Helicopters in high-speed forward flight often generate High-Speed Impulse (HSI) noise, presenting a major challenge for noise control and narrowing the range of helicopter use. This paper proposes a novel method for active noise reduction by adjusting the rotor diameter length, effectively delaying HSI noise onset and reducing HSI noise impact. Utilizing the CLORNS solver and the Ffowcs Williams-Hawkings (FW-H) equation, this approach was tested on the AH-1G rotor through simulation analysis. The study simulated the rotor's dynamic diameter length changes, analyzing the effect of crucial parameters on the sound field. Results indicate that this method significantly controls the production of rotor high-speed pulse noise, achieving a noise reduction of up to 2dB at critical operational points. This research aids in formulating specific rotor noise control laws and expands the range of scenarios for helicopter usage.

Ding, Yan, Zhao, Guoqing, Wang, Bo, Zhao, Qijun, Chen, Xi

Medical Device Machining: Precise and Reliable Parts for Critical Applications

TBMG-4695311/1/2022

Investigations of Process and Component Parameters for the Number of Particles and Size Distribution of a Supercharged DI-SI Engine

2022-01-07003/29/2022

Due to the short mixture formation times in the direct injection of modern gasoline engines, there is an increase in the emission of undesirable particle emissions in gasoline engines. As a result of previous studies with a portable emission measurement system (PEMS) of raw emissions and cleaned emissions, the particle number (PN) of the sampling point after the catalyst was higher than before the catalyst at the same process parameters and engine operating points. Based on this reproducible phenomenon, several theories were proposed. The theories set up dealt on the one hand with the question of process control with regard to the formation of particles, but also fundamentally with the question of whether conventional exhaust gas aftertreatment systems (3-way catalytic converters) are suitable for influencing the number of particles. In addition, studies of the oil consumption via the blow-by system and its influence on particle emissions also played a role. To verify these theories

Dost, Tobias, Schambach, Ricardo, Getzlaff, Joern

Instrumental Color Difference Measurement for Exterior Finishes, Textiles, and Colored Trim

J1545_20211212/30/2021

The practice applies to parts and materials used in vehicle manufacture which are intended to be acceptable color matches to a specified color standard. This practice is intended for use with parts or materials that are opaque or nearly so and does not apply to transparent materials. Materials covered by this practice include topcoat paint finishes, interior soft trim, interior and exterior hard trim, and exterior film.

Textile and Flexible Plastics Committee

RM13006 - Process Control Methods

AESQRM0062021099/7/2021

AS13100 AESQ Quality Management System Requirements for Aero Engine Design and Production Organizations Standard was created to replace customer specific quality requirements – leading to simplification and harmonization between engine manufacturer supply chains. AS13100 is supported by a series of 13 AESQ Reference Manuals (RM) that provide additional detail on certain subjects to describe the intent of the standard and to provide guidance on deployment. The Reference Manuals are designed to enable the supply chain to deploy the AS13100 requirements efficiently and effectively. The AESQ RMs provide case studies, guidance material, forms and checklists specific to each section of the standard to aid the user with implementation.

Aerospace Engine Supplier Quality Strategy Group

Achieving High Marks for Medical Device Makers: Ultrashort Pulse Lasers

TBMG-397659/1/2021

Reliability is vital for medical device manufacturers. To accommodate such high levels of dependability, device makers use quality process control and before-market and after-market traceability to ensure the highest level of integrity and compliance for their devices and instruments. This article addresses the challenging medical device marking concerns for device makers and shows how ultrashort pulse laser marking systems can solve this critical issue.

Assembly and Soldering Criteria for High Quality/High Reliability Soldering Wire and Cable Termination in Aerospace Vehicles

AS4461D (Current)

7/23/2021

This standard is applicable to manual soldering and machine soldering processes utilizing controlled soldering devices, for electrical connections for wiring and cabling used in aerospace vehicles. Description of a component or device herein is not to be construed as authorizing the use of the component or device.

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install

Assembly and Soldering Criteria for High Quality/High Reliability Soldering Wire and Cable Termination in Aerospace Vehicles

AS4461D-TEST-REC (Historical)7/23/2021

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install

ARP6400 (Current)6/7/2021

This ARP specifies the recommended methods of handling silver coated conductors and shield, by the conductor fabricator, wireinsulator, distributors, harness or assembly houses, and OEM’s. Red Plague mitigation depends upon each link in the chain of supply handling the wire and cable properly.

AE-8D Wire and Cable Committee

Chord Method of Evaluating Surface Microstructural Characteristics

ARP1820C (Current)

5/19/2021

This practice provides a method for evaluating microhardness and microstructure very close (0.002 inch (0.051 mm) or less) to the surface of a disk specimen. Specific accept/reject criteria for partial decarburization (3.7.1), inadvertent carburization/nitriding (3.7.3), total decarburization/intergranular oxidation (3.8), and other characteristics evaluated are to be found in the applicable specification where this ARP is referenced.

AMS E Carbon and Low Alloy Steels Committee

Cast Aluminum Alloy Composite 4.6Cu - 3.4Ti - 1.4B - 0.75Ag - 0.27Mg (205.0/TiB2/3p-T7P) Investment Cast, Solution and Precipitation Heat Treated

AMS4471B (Historical)

4/22/2021

This specification covers a dilute aluminum/TiB2 metal matrix composite in the form of investment castings.

AMS D Nonferrous Alloys Committee

Metal Powder Feedstock Size Classifications

AMS7025 (Current)

4/22/2021

This specification covers particle size classifications and corresponding particle size distribution requirements for metal powder feedstock conforming to a classification.

AMS AM Additive Manufacturing Metals

Aluminum Alloy, Castings 5.0Si - 1.2Cu - 0.50Mg (355.0-T51) Precipitation Heat Treated

AMS4210M (Current)

4/22/2021

This specification covers an aluminum alloy in the form of castings.

AMS D Nonferrous Alloys Committee

Metal Powder Feedstock Size Classifications

AMS7025-TEST-REC (Historical)4/22/2021

This specification covers particle size classifications and corresponding particle size distribution requirements for metal powder feedstock conforming to a classification.

AMS AM Additive Manufacturing Metals

RM13006 - Process Control Methods

AESQRM0062021033/8/2021

Aerospace Engine Supplier Quality Strategy Group

Application of Selective Assembly as an Aerospace Design for Manufacturing and Assembly Principle for Effective Variation Management in Aerospace Assemblies

2021-01-00053/2/2021

Aerospace engine parts are complex precision-engineered products with tighter assembly tolerances produced by conventional and non-conventional manufacturing processes. Variations in these manufacturing processes have to be controlled, process risks mitigated, and managed effectively, to facilitate the ease of aero-engine assembly to reduce overall variation and improve the assembly quality. One such technique is the application of the Selective Assembly as a Design for Manufacturing and Assembly (DfMA) tool. The paper details the methodology of Selective Assembly, its applications, benefits, and limitations in the aerospace industry along with a framework case study with a focus on ease of assembly and meeting the design intent of the assembly fit with the detailed study on the current traditional assembly process. The focus is to analyze the current challenges faced on the application of the Selective assembly of Aero-engine components through a case study on the development and

Rajamani, Mani Rathinam

Creating High-Precision Glass for NIR Lasers

TBMG-386333/1/2021

Erbium (Er) doped phosphate glass exhibits many beneficial properties, which has led to an increased demand in recent years for Er:glass lasers for applications as wide-ranging as laser rangefinding, long-distance communications, dermatology, and laser-induced breakdown spectroscopy (LIBS). Erbium fiber amplifiers enable rapid global communication in the transpacific cable between Hong Kong and Los Angeles, Er:glass laser rangefinders are increasingly used in defense applications and reconnaissance, and Er:glass aesthetic lasers are gaining traction for removing scarring and even treating hair loss caused by androgenetic alopecia.

Essentials of PCBA Cleaning for Wearables

TBMG-3815312/1/2020

Wearable healthcare is on the rise. In fact, the wearable medical devices market size was valued at over USD 9.0 billion in 2018 and is expected to witness 39.4 percent CAGR from 2019 to 2025. The demand for digital wellness, remote monitoring, and diagnostics means an increasing requirement to produce complex miniature electronic components with ever-tighter tolerances. This brings with it printed circuit board assembly (PCBA) cleaning challenges that must be addressed at the design stage in order to ensure reliability. This article discusses how PCBA cleaning can be incorporated into the planning and production of wearables and the essential methods to be used.

Small Innovations Could Help Robotic Surgery Become Big Business

TBMG-3808011/1/2020

Material and equipment innovations, coupled with the stepped-up collaborative efforts of device manufacturers and their supply partners, continue to advance the development of micro parts and devices used in minimally invasive surgical (MIS) procedures for orthopedic, neurostimulation, and cardio, to name a few disciplines. This article takes a closer look at this trend and how smaller parts and devices will likely play bigger roles in the advancement of robotic surgery and telesurgery, followed by examples of robotic platforms in use at healthcare facilities in the United States and abroad.

Single-Use Applications Maximize Biomanufacturing Agility

TBMG-3806611/1/2020

Biopharmaceutical manufacturing is changing. With the rise of biologics and personalized medicine, the industry is appreciating the single-use manufacturing style. Instead of large-scale production processes, manufacturers are finding it pays to be agile — which is why many are increasingly adopting single-use technologies to turn over new products and batches quickly and efficiently. Single-use technologies utilize disposable bioprocessing equipment in place of traditional stainless steel. By eliminating the time-consuming clean-in-place (CIP) and steam-in-place (SIP) processes between batches, single-use technologies cut down on the costs of labor, materials, and utilities — all while shortening time to market.

Taking Benchtop Fluid Dispensing to a New Level of Process Control

TBMG-3807611/1/2020

Pneumatic benchtop fluid dispensers encompass a range of models that can accommodate specific fluid application processes with a wide scope of functionality. The latest benchtop dispensers provide a high degree of process control, capable of dispensing adhesives, solder pastes, and all other assembly fluids with high consistency. Handling fluid dispensing of dots, beads, and fills under a broad range of conditions, these units are equipped with multiple capabilities to refine the dispensing process. Features such as 0–100 psi air pressure regulation, timed-shots, vacuum control to keep thin fluids from dripping, digital time/pressure displays, and electric foot pedals help operators maintain process control.

Utilizing Casting Technologies on Legacy Part

F-0076-2020-16279

10/5/2020

Sikorsky has developed a specification outlining the use of three casting technologies: simulation, additive manufacturing of the mold and low pressure casting. This specification has been used in the past on new development projects with positive results, reducing lead times and number of pours to produce a useable part. When the S-92 program needed to develop a second source for a casting, they worked with Magellan Aerospace to implement the specification. The project proceeded on time with all castings able to be used. Some elements of the specification were modified to work with a legacy part design, including the use of statistical process controls to reduce variability in crucible pouring.

Woodworth, Heather, Featheringham, Andrew

Unsettled Technology Domains in Industrial Smart Assembly Tools Supporting Industry 4.0

EPR20200189/29/2020

“Smart” refers to tools that are “specific, measurable, achievable, reasonable/realistic, and time bound.” Smart assembly tools are used in many industries, including automotive, aerospace, and space for measuring, inspecting, gauging, drilling, and installing all existing fastening systems. Inside the Industry 4.0 environment, these tools have a huge influence on Information and Communication Technology (ICT), assembly cost reduction, process control, and even the product and process quality.These four domains—and their undefined nature—are the focus of this SAE EDGE™ Research Report. The technical issues identified here need to be discussed, the goals clarifying the scope of the industry-wide need to be aligned, and the issues requiring standardization need prioritized.NOTE: SAE EDGE Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies of interest to the mobility industry. The goal of SAE EDGE Research Reports is to

Roye, Thorsten

LSR Technology: A New Dimension in Design of Medical Devices

TBMG-37349

8/1/2020

Today’s medical device manufacturers are facing changing and more challenging requirements for their products. Users are demanding less-invasive devices, and in some cases, wearable devices that are robust and long lasting. Regulations are becoming ever more stringent and costly, especially in terms of biodegradability. Yet at the same time, device manufacturers want to meet user demands by including the latest technologies, while keeping their costs under control.

Cable, Thermocouple Extension, Shielded and Unshielded

AS5419B (Current)

6/2/2020

This SAE Aerospace Standard (AS) covers the requirements for thermocouple extension cable. Manufacturers of primary thermocouple wire in accordance with this specification must be qualified to the similar wire type specified in Table 1.

AE-8D Wire and Cable Committee

Cable, Thermocouple Extension, Shielded and Unshielded

AS5419B-TEST-REC (Historical)6/2/2020

AE-8D Wire and Cable Committee

Chromaticity Requirements for Ground Vehicle Lamps and Lighting Equipment

J578_202004 (Current)

4/29/2020

This SAE Standard defines and provides a means for the control of colors employed in motor vehicle external lighting equipment, including lamps and reflex reflectors. The document applies to the overall effective color of light emitted by the device in any given direction, and not to the color of the light from a small area of the lens. It does not apply to pilot, indicator, or tell-tale lights.

Lighting Standard Practices Committee