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Time Domain Full Vehicle Interior Noise Calculation from Component Level Data by Machine Learning

Mercedes-Benz AG-Dimitrios Ernst Tsokaktsidis, Clemens Nau
Technical University of Munich-Steffen Marburg
  • Technical Paper
  • 2020-01-1564
To be published on 2020-06-03 by SAE International in United States
Computational models directly derived from data gained increased interest in recent years. Data-driven approaches have brought breakthroughs in different research areas such as image-, video- and audio-processing. Often denoted as Machine Learning (ML), these approaches are not widely applied in the field of vehicle Noise, Vibration and Harshness (NVH) yet. Related works mainly discuss the topic with respect to structural health monitoring, psychoacoustics, traffic noise and as improvement to existing numerical simulation methods. Vehicle interior noise is a major quality criterion for today’s automotive development. To estimate noise levels early in the development process, deterministic system descriptions are created by utilizing time-consuming measurement techniques. This paper examines whether pattern-recognizing algorithms are suitable to improve the prediction process for a steering system. Starting from operational measurements, a procedure to calculate the sound pressure level in the passenger cabin is developed and investigated. Component time domain data serves as basis for the computation. The important inputs are determined by a correlation analysis. Input selection is followed by data reduction. After preprocessing, a supervised learning environment is established.…
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Human Factor Considerations in the Implementation of IVHM

HM-1 Integrated Vehicle Health Management Committee
  • Aerospace Standard
  • AIR6915
  • Current
Published 2020-03-20

This SAE Aerospace Information Report (AIR) offers information on how human factors should be considered when developing and implementing IVHM capabilities for both military and civil fixed wing aircraft. These considerations will cover the perception, analysis, and action taken by the flight crew and the maintenance personnel in response to outputs from the IVHM system. These outputs would be onboard realtime for the flight crew and post flight for maintenance. This document is not intended to be a guideline; it is intended to provide information that should be considered when designing and implementing future IVHM systems.

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Unsettled Technology Opportunities for Vehicle Health Management and the Role for Health-Ready Components

VHM Innovations LLC-Steve Holland
  • Research Report
  • EPR2020003
Published 2020-03-17 by SAE International in United States
Game-changing opportunities abound for the application of vehicle health management (VHM) across multiple transportation-related sectors, but key unresolved issues continue to impede progress. VHM technology is based upon the broader field of advanced analytics. Much of traditional analytics efforts to date have been largely descriptive in nature and offer somewhat limited value for large-scale enterprises. Analytics technology becomes increasingly valuable when it offers predictive results or, even better, prescriptive results, which can be used to identify specific courses of action. It is this focus on action which takes analytics to a higher level of impact, and which imbues it with the potential to materially impact the success of the enterprise. Artificial intelligence (AI), specifically machine learning technology, shows future promise in the VHM space, but it is not currently adequate by itself for high-accuracy analytics. The recent push for health-ready components offers hope in resolving some of the issues slowing the implementation of VHM technology. Health-ready components are those components that provide the necessary functionality or information to allow them to be gracefully integrated into…
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Guidelines for Writing IVHM Requirements for Aerospace Systems

HM-1 Integrated Vehicle Health Management Committee
  • Aerospace Standard
  • ARP6883
  • Current
Published 2019-12-03 by SAE International in United States
This Aerospace Recommended Practice (ARP) provides guidance on developing requirements for systems that include Integrated Vehicle Health Management (IVHM) capability [REF1], [REF18]. IVHM is increasingly being implemented on military and commercial aircraft. Some examples include the F-35 Joint Strike Fighter (JSF) [REF1] and the AH-64 Apache [REF3] in the military domain, and the B787 [REF4] and A350XWB [REF5] in the commercial domain. This document provides a systematic approach for developing requirements related to the IVHM capabilities of a vehicle system. This document is not intended to repeat general guidelines on good requirements writing [REF13], [REF20]. Instead, the focus is on the unique elements, which need to be considered for IVHM and the resulting specific guidelines that will help define better requirements and hence better systems. The multi-faceted nature of IVHM should include the process of requirements gathering. Therefore, this document presents some guidance on how to go about this task. The document also includes some case studies that illustrate, in a practical manner, what a good set of IVHM requirements might look like. These have…
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Web-Based Technology Assesses Structural Health

  • Magazine Article
  • TBMG-35445
Published 2019-11-01 by Tech Briefs Media Group in United States

Understanding how cars, planes, bridges, and other structures handle vibrations and dynamic loads can be critical to their design and performance. Researchers have developed a new way to measure the response of civil, mechanical, and aerospace structures to dynamic loads and analyze their structural health.

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Perspectives on Integrating Structural Health Monitoring Systems into Fixed-Wing Military Aircraft

Aerospace Industry Steering Committee on Structural Health
  • Aerospace Standard
  • AIR6245
  • Current
Published 2019-09-18 by SAE International in United States

This SAE Aerospace Information Report (AIR) is prepared for stakeholders seeking information about the evolution, integration, and approval of SHM technologies for military aircraft systems. The report provides this information in the form of (a) two military organizations’ perspectives on requirements, and (b) general SHM challenges and industry perspectives. The report only provides information to generate awareness of perspectives for military aircraft and, hence, assists those who are involved in developing SHM systems understanding the broad range of regulations, requirements, and standards published by military organizations that are available in the public domain from the military organizations.

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IVHM Design Guidelines

HM-1 Integrated Vehicle Health Management Committee
  • Aerospace Standard
  • ARP6407
  • Current
Published 2019-07-29 by SAE International in United States
This Aerospace Recommended Practice (ARP) provides guidance for the design of an integrated vehicle health management (IVHM) capability that will extend the vehicle’s inherent design to enable health management of the platform and its components. This guidance is technology-independent; the principles are generally applicable to the majority of potential IVHM design scenarios, including “clean sheet” system design, where IVHM is considered as a primary design consideration, and the retrofit design, where existing systems are modified and leveraged with the IVHM capability. In either case, this ARP provides guidance for designing the IVHM capability from the feasibility assessment to the conceptual design analysis and to the development design phases, with considerations given to trade studies, metrics, and life cycle impacts.
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Landing Gear Structural Health Monitoring

A-5 Aerospace Landing Gear Systems Committee
  • Aerospace Standard
  • AIR6168A
  • Current
Published 2019-05-23 by SAE International in United States
This SAE Aerospace Information Report (AIR) discusses past and present approaches for monitoring the landing gear structure and shock absorber (servicing), opportunities for corrosion detection, methods for transient overload detection, techniques for measuring the forces seen by the landing gear structure, and methods for determining the fatigue state of the landing gear structure. Landing gear tire condition and tire pressure monitoring are detailed in ARP6225, AIR4830, and ARP6137, respectively. Aircraft Brake Temperature Monitoring Systems (BTMS) are detailed in AS1145.
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Data Interoperability for Aerospace IVHM Systems

Infosys-Ravi Kumar G. V. V.
SAP-Martin Whitfield
Published 2019-03-19 by SAE International in United States
Aerospace systems today are generating a lot of data and for the most part all this data is being generated by siloed entities (by various stakeholders like components/sub-system manufacturers, OEMs, operators) and ends up living within the four walls of these individual entities. For the industry to fully benefit from this data there needs to be a transparent way to share this data while strictly controlling the proprietary nature of the data and adhering to all contracts. The SAE HM-1 technical committee is writing an aerospace information report (AIR) 6904 to describe a digital data landscape and approach that can support health management [1]. Integrated vehicle health management (IVHM) systems cut across many disciplines and boundaries and can benefit from structured landscape and well defined approach. For example, data associated with a fault in an aircraft subsystem like the engine must travel through multiple systems and boundaries before it can be analyzed by the cognizant personnel. Today the landscape is pretty ad-hoc; with not many standards governing the data handling, storage, analysis, and disposal. This…
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SAE Author Podcast: IVHM, Civil Aviation and the Passenger Experience

  • Podcast
  • 12414
Recorded 2019-02-20

Ian K. Jennions, Professor and Director of the IVHM Centre, Cranfield University, U.K, discusses Integrated Vehicle Health Management, and how it impacts the way aircraft are and will be maintained in the future. This is also a topic covered in his upcoming title, The World of Civil Aviation, published by SAE International.