Browse Topic: Rapid prototyping

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Model Based Design of Gear Shift Control for Twin Clutch AMT2026-26-00541/16/2026
Model Based Design (MBD) uses mathematical modelling to create, test and refine systems in simulated environment, primarily applied in control system development. This paper discusses an approach to control gear shifting using shift logic on vehicle level for twin clutch transmission using prototype controller. Twin clutch transmission is a concept with two clutches, one at input end of the transmission called primary clutch and the other at output end of the transmission called secondary clutch. This concept is proposed to counter the challenges with conventional transmission which include increased gear shift time and effort in lower gears, potential rollback of vehicle in uphill condition and chance of missed shifts. The advantages of this concept include reduced gear shift effort and improved synchronizer life with potential for reducing the size of the synchro pack. This paper proposes a methodology to develop shift logic, integrate hardware with software, flashing and calibration
Patel, Hiral, Thambala, Prashanth, Tongaonkar, Yogesh, Mosthaf, Joerg, Malpure, Khushal
Manufacturing of Tools for Support Aviation Production using Fused Filament Fabrication and Fused Deposition Modeling Technologies, on the Example of PZL Mielec a Lockheed Martin CompanyF-0080-2024-13245/7/2024
In the proposed article, the authors will focus on two manufacturing method FUSED FILAMENT FABRICATION (FFF) and FUSED DEPOSITION MODELING (FDM) showing examples of application in aviation production and the resulting benefits.
Banaś, Aleksander, Burczy, Kamil, Wojtuszewski, Radosław, Głodzik, Marcin, Gałaczyński, Tomasz
Additive Manufacturing of Threaded Parts for Aerospace applications2022-26-11705/26/2022
Additive manufacturing also known as 3D printing and rapid prototyping is ‘the process of joining materials to make objects from 3D model data, generally layer upon layer. It is a suitable process to produce complex net shape parts, and prototypes. Additive Manufacturing empowers both design and industrial revolution, in various industrial sectors such as aerospace, energy, automotive, medical, tooling and consumer goods. In aerospace today, Additive Manufacturing is bringing lots of advantages and applications but manufacturing threaded fasteners or parts with threads is not much explored. In this study we are exploring this and trying to establish manufacturing threaded parts using additive manufacturing. This is going to give many benefits like reduced part cost, manufacturing and installation time and increased safety. The key features of such parts which makes AM as a best manufacturing method are – angled internal grove, provision for sealant for complete sealing, customized
Shetty, Dr. Kishora, Murthy, Harsha
Game Theory-Based Modeling of Multi-Vehicle and Multi-Pedestrian Interactions While Approaching Unsignalized Crosswalks2022-01-09833/29/2022
Nowadays, numerous efforts are being invested into improvement of road transport safety, especially with respect to vulnerable road users, such as pedestrians. To this end, different passive and active vehicle safety systems, providing warnings and emergency interventions in critical situations to avoid or mitigate collisions, are proposed. For the sake of rapid prototyping of such systems, virtual simulations relying on accurate models are typically used. However, modelling represents a challenging task, as it should capture complex behaviour of both drivers and pedestrians and their interactions over a wide range of driving situations (e.g., near intersections). This paper deals with modelling of vehicle-pedestrian interactions while approaching an unsignalized crosswalk. The study starts from the previously developed model covering simplified single-vehicle and single-pedestrian scenario, which consists of two distinctive parts: (i) expectation model which provides probabilities of
Pavelko, Lea, Skugor, Branimir, Deur, Josko, Ivanovic, Vladimir, Tseng, H. Eric
Zebra Printer in-line Implementation2021-36-00642/4/2022
The project presents the advantages of using agile methodologies such as Scrum and Extreme Programing, for software development inside big company, showing that is feasible to adopt Agile Methods even in large companies’ culture. Analyzing this methodology being applied in a print management software for a zebra printer, demonstrating the characteristics of agile development such as agility in development time and ease of adapting the necessary changes in a Windows forms application with the C language. The application that was used to demonstrate the advantages of these methodologies has three basic functions, managing communication with an external service to validate and pass printer status, which is done through an RS232 communication, information management in database SQLite in the application itself, and control of the information that will be sent to a zebra printer, through an Ethernet communication passing data in ZPL (Zebra Programming Language). The advantages of applying
Oliveira, Lucas Miranda, dos Santos Nunes, Caio C´esar, da Costa, Roberto Coelho
Evaluating the mechanical behavior of fused deposition modeling parameters of Raster angle and Layer thickness effects on as-built and annealed polymer associated composites2021-28-028310/1/2021
Fused deposition Modeling (FDM) is one of the 3D techniques which are mainly used to fabricate the three-dimensional object directly and it is more economical method. The objective of this investigation is to primarily as-build and annealed polymer associated composites of carbon fiber Polyethylene Terephthalate Glycol (CF-PETG) material by FDM with the effect of different raster angle and layer thickness were consider for the prime parameters. The test specimen was prepared by FDM process with different raster angle (00/900, -450, +450, -450+450) and layer thickness (100, 400 microns) with other parameters were kept constant. The study of the mechanical properties such as hardness, tensile and impact test of the as-built and annealed CF-PETG were studied. The best results obtained for annealed specimens printed with raster angle of 00/900 and layer thickness of 100 microns produced more influence in all the mechanical properties. The high strength printed samples were suggested for
Ari Gowder Ravi Kumar, Sivanesh, R, Soundararajan, Dorai, Arivazhakan, Suresh Kumar, Gopinath, Ramesh, Aravind Kumar
Investigations on the Wear Rate Properties on 3D Printed Carbon Fiber Reinforced PLA2021-28-023910/1/2021
Fiber-reinforced polymer composites propose exceptional directional mechanical properties, and combining their advantages with the potential of 3D printing has resulted in many novel research fronts. Industries have started using 3D printed components which are rapidly replacing conventional material components in most of the industries. Carbon fiber reinforced Polylactic Acid (PLA) often finds its application in reasonably high loading conditions working at lesser speed like lightweight gears, spanners, nuts, and bolts. Wear reduction is an important factor that plays an important role in prolonging the component's life. Hence, it is crucial to optimize 3D printing parameters to get desired strength according to the application. The aim of this paper is to conduct the wear rate test on the Fused Deposition Modelled (FDM) printed carbon fiber reinforced PLA parts, to identify the optimum printing parameters which are crucial for wear reduction. Two process parameters i.e. fill density
Raja, Kumar, Naiju, CD, M, Senthil Kumar, Dessalegn, Naol
Evaluation and Comparison of Mechanical Properties of PETG and CF – PETG Fabricated using FDM Process of Additive Manufacturing2021-28-020810/1/2021
The utilization of Additive Manufacturing (AM) technology in the current manufacturing sector is growing day – by – day. This is made possible by the constant development of new materials and techniques to overcome the difficulties that are encountered while fabricating a part. In AM, parts are fabricated by laying successive layers on one another till the complete part is build. This gives AM an edge over conventional manufacturing. Even intricate or hollow parts can be fabricated with the same ease as fabricating a solid part. The key objective of this project is to evaluate and compare mechanical properties of Polyethylene Terephthalate – Glycol modified (PETG) and Carbon fiber reinforced Polyethylene Terephthalate – Glycol modified (CF – PETG), which are fabricated using Fused Deposition Modelling (FDM) process of AM. The ASTM standards D638 and D790 were followed for fabricating tensile test and Flexural test specimens respectively. Subsequently, fractured specimens are analyzed
Raja, Kumar, Naiju, CD, Senthil Kumar, M, Krishnan, Padmanabhan, Dessalegn, Naol
BioPod Takes One Step Closer to Life on MarsTBMG-397829/1/2021
Dassault Systèmes Velizy-Villacoublay, France
Utilizing Engine Dyno Data to Build NVH Simulation Models for Early Rapid Prototyping2021-01-10698/31/2021
As the move to decrease physical prototyping increases the need to virtually prototype vehicles become more critical. Assessing NVH vehicle targets and making critical component level decisions is becoming a larger part of the NVH engineer’s job. To make decisions earlier in the process when prototypes are not available companies need to leverage more both their historical and simulation results. Today this is possible by utilizing a hybrid modelling approach in an NVH Simulator using measured on road, CAE, and test bench data. By starting with measured on road data from a previous generation or comparable vehicle, engineers can build virtual prototypes by using a hybrid modeling approach incorporating CAE and/or test bench data to create the desired NVH characteristics. This enables the creation of a virtual drivable model to assess subjectively the vehicles acoustic targets virtually before a prototype vehicle is available. This approach can also be used with, but not limited to
Thom, Brian, Singh, Vinod, Newton, Gary, Rengarajan, Revathi, Radic, Nebojsa
Curing the Porosity Problem in Additive Manufacturing21AERP08_028/1/2021
Additive manufacturing, also known as 3D printing, allows the fast and cost-effective production of complex high-quality components in a range of materials. The rise of this technology has been fast, and it is rapidly altering the manufacturing landscape. In 2019, the global additive manufacturing market size was valued at $11.58 billion and is predicted to grow at a CAGR (compound annual growth rate) exceeding 14% from 2020 to 2027 (GVR). Additionally, research from Deloitte shows that additive manufacturing is empowering industry 4.0.
How 3D printing could add efficiency to EV power electronics21AUTP05_085/1/2021
“Think production!” Perhaps that advice should be posted on the wall of every design office, R&D lab and advanced technology center in the auto industry. Although obeying that warning is clearly not cost-effective in some instances, others are ostensibly perfect to take their place in volume manufacture. An example is 3D printing (aka additive manufacturing, or AM), but despite a broadening scope that now embraces rapid prototyping and tooling by entire houses, it could do better in series production of auto components, particularly in the new world of EVs. Prof. Peter Wilson of the U.K.'s newly established Institute for Advanced Automotive Propulsion Systems (IAAPS) at the University of Bath, noted the growing adoption of high-speed SiC (silicon carbide) and other wide-band-gap semiconductor devices demonstrates the benefits that 3D printing could have in the production of EV inverters. “SiC devices offer so much opportunity to improve inverter performance,” Wilson said. “But system
Birch, Stuart
Rotorcraft: Application of Existing Aircraft Designed Tires, Wheels and BrakesARP5632 (Current)4/23/2021
This document covers recommendations for the application of existing qualified and approved in-service fixed wing aircraft tires, wheels and brakes to military and commercial rotorcraft. NOTE: This document does not address the use of radial tires due to insufficient data to support their approved use on rotorcraft, see paragraph 4.3.14 for specific impact on ground resonance.
A-5 Aerospace Landing Gear Systems Committee
Unauthorized Laser Illuminations: Pilot Operational ProceduresARP5598A (Current)3/1/2021
This document addresses the operational safety and human factors aspects of unauthorized laser illumination events in navigable airspace. The topics addressed include operational procedures, training, and protocols that flight crew members should follow in the event of a laser exposure. Of particular emphasis, this document outlines coping strategies for use during critical phases of flight. Although lasers are capable of causing retinal damage, most laser cockpit illuminations, to date, has been relatively low in irradiance causing primarily startle reactions, visual glare, flashblindness and afterimages. Permanent eye injuries from unauthorized laser exposures have been extremely rare. This document describes pilot operational procedures in response to the visual disruptions associated with low to moderate laser exposures that pilots are most likely to encounter during flight operations. With education and training, pilots can take actions that safeguard both their vision and the
G10-OL Operational Laser Committee
Innovation on a Larger Scale: Robotic Fiber Placement and 3D PrintingTBMG-385062/1/2021
Washington, DC
Technology Remedies 3D Printing’s “Weak Spot”TBMG-384872/1/2021
Allowing users to create objects from simple toys to custom prosthetic parts, plastics are a popular 3D printing material. But these printed parts are mechanically weak — a flaw caused by the imperfect bonding between the individual printed layers that make up the 3D part.
Special Section: The Winners of the 2020 'Create the Future' Design ContestTBMG-3828312/1/2020
The , launched in 2002 by Tech Briefs Media Group (publishers of Tech Briefs magazine), recognizes and rewards engineering innovations that benefit humanity, the environment, and the economy. The annual contest draws product designs from engineers, students, and entrepreneurs worldwide.
Technology Leaders: Industry Renaissance Transforms Invention, Learning, Production, and TradeTBMG-3819612/1/2020
A profound societal transformation is underway on a scale not seen since the great European Renaissance. Then, Gutenberg’s printing press made books — and the knowledge they contained — available to all. Today, the new book is the experience. Digital technology, which enables virtual experiences, is enabling an Industry Renaissance that is shaking all sectors of society with new ways, both real and virtual, of inventing, learning, producing, and trading.
Products of Tomorrow: October 2020TBMG-3780010/1/2020
This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.
Rapid Prototyping of Cable and Connectors for Unique ApplicationsTBMG-3783310/1/2020
The need for new connector and cable, or modified versions of standard interconnection systems, is growing exponentially. Highly portable electronics and the extension of their use in unique, rugged applications (often in challenging environments), are demanding new designs as well as performance. This is a period of rapid technology development, as designers create new products and instruments with higher-speed circuits that run faster, last longer, and go places we could not imagine.
Laser Wire Additive Manufacturing SystemTBMG-3789110/1/2020
ADDere Additive Manufacturing Waukesha, WI 414-327-0000
Fluoride Materials for Extra-Thin Computer ChipsTBMG-3782710/1/2020
Smaller and more compact is the direction in which computer chips are moving. Two-dimensional (2D) materials are considered to have great potential since they are as thin as a material can possibly be — in extreme cases, they consist of only one single layer of atoms. This makes it possible to produce novel electronic components with tiny dimensions, high speed, and optimal efficiency.
Designing Connectivity Solutions for an Electric Aircraft FutureTBMG-3788710/1/2020
The levels of voltage and current needed in electric-powered vertical takeoff and landing aircraft (eVTOL), personal air vehicles (PAVs), and rotorcraft systems are high and going higher. That’s because electric propulsion motors, inverters, controllers, batteries, and sensor-laden electric aircraft require significant amounts of power.
3D Additive Manufacturing with a High-Power Electron GunTBMG-3781210/1/2020
Electron beam additive manufacturing is a rapidly growing industry. Electron guns capable of reaching higher energies and higher average power can enable larger melt pools, higher production speed, and permit a broader range of materials for metal additive applications.
Designing Connectivity Solutions for an Electric Aircraft Future20AERP10_0310/1/2020
The levels of voltage and current needed in electric-powered vertical takeoff and landing aircraft (eVTOL), personal air vehicles (PAVs), and rotorcraft systems are high and going higher. That's because electric propulsion motors, inverters, controllers, batteries, and sensor-laden electric aircraft require significant amounts of power. High voltages and high kW peak outputs present many implementation challenges. Designers can meet these challenges by understanding how proper product selection and a “follow-the-wire” design approach enable high-power connectivity solutions. Some of the hurdles that designers need to overcome include the following.
Engineers 3D-Print Sensors Onto Moving OrgansTBMG-376689/1/2020
A new technique allows 3D printing of hydrogel-based sensors directly on the surface of organs, such as lungs — even as they expand and contract. The technology was developed to support robot-assisted medical treatments. According to the researchers, along with a robot's ability to assist a surgeon with removing a tumor from a lung, for example, this technology could 3D print a sensor onto the surface of the lung to monitor how well it functions during and following the procedure.
User Interface Development Tools Speed Time to Market for More Intuitive ProductsTBMG-373558/1/2020
Over the years, technological innovation has allowed the medical equipment sector to become a mission-critical part of the healthcare industry, delivering such benefits as lower operating costs and improved patient outcomes. But competitive pressures are driving the need for device developers to provide a richer experience for users, incorporating broader capabilities and features and more options.
Wraparound SensorsTBMG-374748/1/2020
A low-cost, printed, flexible sensor was developed that can wrap around power cables to precisely monitor electrical loads. Using an inkjet printer, researchers deposited wires on a flexible plastic substrate, then wove in a magnetic strip to channel the flux produced by an electric current, making the sensor suitable to install in tight spaces.
Making Data Logging, Replay and Prototyping More Efficient20AVEP07_057/1/2020
High levels of continuity and compatibility are vital to avoid interruptions in the development process - and reduce cost. The development of advanced driver assistance (ADAS) and highly automated driving systems poses great challenges for OEM and supplier engineers. It is important, therefore, that powerful, flexibly configurable development systems optimally support the various use cases in data-driven development to make it as efficient as possible. In the case of functionality for both ADAS autonomous driving, the chain of effects can be divided into several steps, starting with environment detection with the aid of extensive sensor technology - including camera, radar, lidar and ultrasonics - and ending with the final implementation of the driving strategy and actuator control (Fig. 2).
Mertens, Frank, Müller, Marius
SAE TOMORROW TODAY: The Future of Urban Air Mobility128946/19/2020
We take to the sky as a pioneering voice in VTOL, Mark Moore, the Engineering Director of Aviation at Uber Elevate, joins host Grayson Brulte to walk through his journey from NASA to Uber and how eVTOLs (electric vertical takeoff and landing aircraft) will lead to redesigned cities with transportation freedom. Mark breaks down the misconceptions of eVTOLs and their benefits compared to helicopters, including reduced noise pollution and the safety parameters built into eVTOL design that create thrusting control redundancies to ensure continued operation even if a part is broken. He shares his unique perspective on how the traditional roles of commercial operators and government agencies have flipped with Silicon Valley leading the charge on the technological innovations and capital investment for eVTOLs. The two discuss Uber's Elevate strategy of collaboration for the establishment of an ecosystem of developers, public officials and key stakeholders to make the endeavor a reality. Mark
Hineman, Marcie
Soft Tactile Logic Distributes Decision-Making Throughout Stretchable MaterialTBMG-370476/1/2020
Soft tactile logic was developed that can make decisions at the material level where the sensor is receiving input, rather than relying on a centralized, semiconductor-based logic system. The resulting device is not quite a robot and not quite a computer but has characteristics of both.
Practical 3D Printing of Antennas and RF Electronics20AERP06_056/1/2020
Additive manufacturing can reduce the time and material costs in a design cycle and enable on-demand printing of customized parts. New multi-material 3D printers that can print both metal and dielectric materials enable the additive manufacturing of antennas and RF components. Developments in software are critical to leveraging this capability; good tools allow more effort to go towards creation than implementation. Three devices are described in detail in this article to demonstrate the 3D printing of RF components. First, a Marchand balun is presented, demonstrating rapid prototyping of a complex, multilayer RF circuit. Next, a monopole array is shown with an integrated beam-steering network and radome to show rapid prototyping of a complete antenna system. Finally, a bowtie antenna with rounded corners is presented, showing good performance in the Kuband.
New Tech Takes Radiation Out of Cancer ScreeningTBMG-369185/1/2020
A new, inexpensive technology could save lives and money by routinely screening women for breast cancer without exposure to radiation. The system uses harmless microwaves and artificial intelligence (AI) software to detect even small, early-stage tumors within minutes.
Xcelerating innovation, HONDA-STYLE20AUTP05_035/1/2020
Honda's pragmatic approach to partnering with tech startups is delivering promising results. For the past five years, Honda Innovations, part of the automaker's R&D enterprise, has been quietly running a collaborative, open-innovation program at six locations around the world. Known as the Honda Xcelerator, its overall mission is not unlike those of other mobility OEMs looking to engage with tech startups. This equates to funding for rapid prototyping, providing access to a collaborative workspace, and letting them work with mentors within Honda to develop products for at least one of eight focus areas. These areas include AI and robotics, connected vehicles, human-machine interface (HMI), industrial innovation, personal or shared mobility, vehicle data business, in-vehicle apps and energy innovation. But Honda's approach, at its Xcelerator offices in Israel, Japan, Detroit, China and Mountain View, California, is unique. The 72-year-old mobility company is careful about the startups
Blanco, Sebastian
Micromolding: Achieving Exacting Medical Device Manufacturing RequirementsTBMG-369295/1/2020
It is undoubtedly fair to say that one of the key sectors driving innovation in the area of micromolding is the medical device industry. Demand for minimally invasive curative and diagnostic procedures is growing exponentially, and because of this, medical device manufacturers have been designing (and seeking to manufacture) smaller and smaller components, with thinner walls, and complex and miniature features. Couple this with the overarching demand from patients and healthcare providers to rationalize the costs associated with medical treatment, and medical device OEMs are constantly on the lookout for cost-effective and efficient manufacturing processes.
Device Tests Drugs on Tumor TissueTBMG-368285/1/2020
Testing cancer treatments relies mostly on trial and error; patients may undergo multiple time-consuming and hard-to-tolerate therapies in pursuit of one that works. Recent innovations in pharmaceutical development involve growing artificial tumors to test drugs on specific cancer types. These models take weeks to grow and don’t account for an individual patient’s biological makeup, which can affect treatment efficacy.
High-Tech Printing May Help Eliminate Painful ShotsTBMG-369165/1/2020
Engineers have created tiny needles that mimic parasites that attach to skin and could replace hypodermic needles. While 3D printing builds objects layer by layer, 4D goes further with smart materials that are programmed to change shape after printing. Time is the fourth dimension that allows materials to morph into new shapes.
Smart Bandages Monitor and Tailor Treatment for Chronic WoundsTBMG-368665/1/2020
Chronic skin wounds from burns, diabetes, and other medical conditions can overwhelm the regenerative capabilities of the skin and often lead to persistent infections and amputations. Non-healing chronic wounds are a significant medical problem. Patients are often older, non-ambulatory, and limited in their ability to provide self-care, yet non-healing wounds are typically treated in an outpatient setting or at home.
Engine-in-the-Loop Study of a Hierarchical Predictive Online Controller for Connected and Automated Heavy-Duty Vehicles2020-01-05924/14/2020
This paper presents a cohesive set of engine-in-the-loop (EIL) studies examining the use of hierarchical model-predictive control for fuel consumption minimization in a class-8 heavy-duty truck intended to be equipped with Level-1 connectivity/automation. This work is motivated by the potential of connected/automated vehicle technologies to reduce fuel consumption in both urban/suburban and highway scenarios. The authors begin by presenting a hierarchical model-predictive control scheme that optimizes multiple chassis and powertrain functionalities for fuel consumption. These functionalities include: vehicle routing, arrival/departure at signalized intersections, speed trajectory optimization, platooning, predictive optimal gear shifting, and engine demand torque shaping. The primary optimization goal is to minimize fuel consumption, but the hierarchical controller explicitly accounts for other key objectives/constraints, including operator comfort and safe inter-vehicle spacing. This
Xu, Chu, Groelke, Ben, Alvarez Tiburcio, Miguel, Earnhardt, Christian, Borek, John, Pelletier, Evan, Boyle, Stephen, Huynh, Brian, Wahba, Mohamed, Geyer, Stephen, Graham, Christopher, Magee, Mark, Palmeter, Kyle, Naghnaeian, Mohammad, Brennan, Sean, Stockar, Stephanie, Vermillion, Christopher, Fathy, Hosam
A Platform for Quick Development, Simulation and Test of Autonomous Driving Vehicles2020-01-07134/14/2020
This paper proposes a platform to conduct rapid development, simulation and test of autonomous driving vehicles. By combining the advantages of rapid prototyping and software development, the proposed platform could automatically generate codes and download them into domain controllers, therefore the efficiency of development process of the core functions of ADAS can be largely improved. The platform is made up of scene simulation, vehicle dynamics simulation software, a rapid prototyping system, a chassis drive-by-wire control and road-load simulation system. Meaningful tasks including key algorithm development, MIL simulations, domain controller based HIL tests and the development of drive-by-wire systems can all be accomplished by the platform. Since that the E/E architecture of vehicles, intra-vehicle communication and physical characteristics of drive-by-wire systems are well considered, the platform ensures that the developed domain controllers can be directly deployed to road
Qiong, Wu, Man, Adm Jiang Jian, Wei, Liang Hua, Bing, Li Wei
Design Optimization and Aerodynamic Analysis of a Hybrid Blended Wing Body- VTOL Unmanned Aerial Vehicle2020-01-04724/14/2020
Unmanned Aerial Vehicles (UAVs) can be effectively used to serve humanitarian relief efforts during environmental disasters. Designing such UAVs presents challenges in optimizing design variables such as maximizing endurance, maneuverability and payload capacity with minimum launch and recovery area. The Blended Wing Body (BWB) is a novel aircraft configuration offering enhanced performance over conventional UAVs. Designing a blended wing configuration UAV takes into account interdependency between aerodynamic performance and stability. Designing BWB is peculiar and is investigated in this paper with a view to achieve an aerodynamically stable and structurally sound configuration. The designed UAV is a hybrid of a tailless blended-wing-body and a tri-copter configuration with two forward tilt motors for transition into cruise flight after vertical take-off and back to multirotor while landing (VTOL-Vertical Take Off and Landing). The BWB is iteratively optimized in XFLR-5 for Dynamic
Bahl, Pranav, Rastogi, Vikas, bainsla, Amit, Sharma, Nitin
Real-Time Embedded Models for Simulation and Control of Clean and Fuel-Efficient Heavy-Duty Diesel Engines2020-01-02574/14/2020
The ever increasing demand for fuel economy and stringent emission norms drives researchers to continuously innovate and improve engine modes to implement adaptive algorithms, where the engine states are continuously monitored and the control variables are manipulated to operate the engine at the most efficient regime. This paper presents a virtual engine developed by modeling a modern diesel engine and aftertreatment which can be used in real-time on a control unit to predict critical diesel engine variables such as fuel consumption and feed gas conditions including emissions, flow and temperature. A physics-based approach is followed in order to capture vital transient airpath and emission dynamics encountered during real driving condition. A minimal realization of the airpath model is coupled with a cycle averaged NOx emissions predictor to estimate transient feed gas NOx during steady state and transient conditions. The complete airpath and NOx emission model was implemented on a
Duraiarasan, Saravanan, Salehi, Rasoul, Wang, Fucong, Stefanopoulou, Anna, Allain, Marc, Mahesh, Siddharth
Prototype Patch Acts Like Heart TissueTBMG-364234/1/2020
Bioengineers from Trinity have developed a prototype patch that does the same job as crucial aspects of heart tissue.
High-Area Rapid 3D PrintingTBMG-363874/1/2020
High-Area Rapid Printing (HARP) enables a record-breaking throughput that can manufacture products on demand. The prototype HARP system is 13 feet tall with a 2.5-square-foot print bed and can print about half a yard in an hour. It can print single, large parts or many different small parts at once.
Light Attack Reconnaissance Helicopter Secures Vertical Lift DominanceTBMG-366164/1/2020
Sikorsky, a Lockheed Martin Company Stratford, CT 203-386-4000
Wireless System Powers Devices Inside the BodyTBMG-361693/1/2020
In the brain, implantable electrodes that deliver an electrical current are used for a technique known as deep brain stimulation, which is often used to treat Parkinson’s disease or epilepsy. These electrodes are now controlled by a pacemaker-like device implanted under the skin, which could be eliminated if wireless power is used. Wireless brain implants could also help deliver light to stimulate or inhibit neuron activity through optogenetics, which so far has not been adapted for use in humans but could be useful for treating many neurological disorders.
Leading Women in Engineering & Science: Making their Mark in Medical HistoryTBMG-362703/1/2020
While women are still underrepresented in STEM fields, including the medical device industry, those who have chosen science and engineering as a profession are making a huge impact. The women in this industry are passionate about bringing solutions to the market that improve patient outcomes and transform patient’s lives. They have broken through barriers to go on to develop transformational devices, fight diseases, and create revolutionary materials. This feature presents insights from a handful of these women, including industry leaders, inventors, entrepreneurs, and those inspiring other women through education.
Q&A: Solid Silk - A Biocompatible, Sustainable, Degradable Building BlockTBMG-361753/1/2020
David Kaplan, Stern Family Professor of Engineering at Tufts University’s College of Engineering, and his team have developed a unique and practical method for processing silk into solid form for products such as rods and plates for medical implants.
Multiple Sensors Aid in Development of an Electrical Vertical Takeoff and Landing AircraftTBMG-361573/1/2020
Beta Technologies (South Burlington, VT) has built a prototype Electrical Vertical Takeoff and Landing aircraft (eVTOL) and is putting it through the wringer. They are using wireless sensor systems from Parker LORD, MicroStrain® Sensing Systems (Williston, VT) to monitor the structures and functions of the prototype, both on a test stand and in flight.
Additive Manufacturing of Precision Optics at Micro and NanoscaleTBMG-357631/1/2020
In optical manufacturing, additive manufacturing (AM), as an advanced manufacturing method, has been gaining interest because of its capabilities in the fabrication of extremely complex shapes. Applications of AM in the fabrication of single optical components (e.g. optical crystal) or systems (e.g. the making of an eagle eye) at the microscale or macroscale level have been the focus of recent developments. AM is an especially good fit for products that require a high level of customization.
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