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AIRBORNE ENGINE VIBRATION MONITORING (EVM) SYSTEM, GUIDELINES FOR PERFORMANCE STANDARD FOR
- Aerospace Standard
Published October 28, 2005 by SAE International in United States
This SAE Aerospace Standard (AS) provides guidelines for the functional, performance, qualification and acceptance testing, and documentation requirements for the components of an airborne engine vibration monitoring (EVM) system which is intended for use as a turbojet engine rotor unbalance indicating system, per FAR 25.1305 (D)(3) on transport category airplanes.
For the purpose of this document, this means a system which can provide real-time flight deck displays of engine vibration caused by rotor unbalance, throughout the flight envelope, which are suitable for:
Relating to engine vibration limits (where such limits are specified)
Use in ice shedding procedures
Helping the flight crew to determine which engine has the higher level of vibration, following an engine damage event.
As a minimum, the functional capability for such a system shall include the ability to compute and display vibration levels specifically related to the rotational speed(s) of the engine rotor(s). Systems which can produce only broadband vibration outputs have been used in the past but they are not considered suitable for the above purposes. Some EVM systems may also generate other outputs, suitable for such functions as engine vibration trend monitoring or trim balance calculation, but these are considered to be outside the scope of the requirements for a minimum system.
This document also defines some recommended, optional, functions and features which, while they are outside the scope of minimum requirements, are nevertheless considered to be highly desirable for a practical system.
It should be noted that systems incorporating capabilities such as described above are also sometimes referred to by the abbreviation AVM. However, there are, or can be, airborne measurements taken of vibrations from sources other than the engines.
For the purpose of this document the more descriptive term, engine vibration monitor (EVM), will be used.
|Technical Paper||Simplified Test Bench to Provide Fast Objective and Subjective Vibration Analysis|
|Technical Paper||Torsional Vibration Absorbers: A Testing and Evaluation Apparatus|
|Technical Paper||Active Remote Dynamic Absorber|
Data Sets - Support Documents
No Datasets Available
BackgroundEngine condition monitoring and rotorcraft HUMS(Health and Usage Monitoring Systems)can be used as a tool to track and restore engine performance, improve problem diagnosis, suggest solutions, promote better commercial and military aircraft operation, minimize in-flight failures, and reduce costs of engine maintenance. Because of these and other continuing objectives, the need for consolidated action by a group of experts to promote engine monitoring and rotorcraft condition monitoring know-how and standards was identified. It was deemed appropriate by the SAE Propulsion Division to assign this task to a special committee designated as Committee E-32. The committee has existed for over 40 years and has 26 active members. Purpose / Charter E-32 Committee serves as a forum to gather, record, and publish expert information in the discipline of aerospace propulsion system health management. The Committee gathers and analyzes requirements for propulsion system health management for the various types of air vehicle propulsion systems and develops standards and recommendations for the adoption of aerospace propulsion system health management devices that affect the operation of propulsion systems. Objectives Identifies potential propulsion system parameters suitable for sensing (pressure, temperature, vibration, etc.) and considerations involved in selecting parameters (potential problems, accuracy, cost, etc.), Analyzes the various approaches to aerospace propulsion system health management (e.g., airborne vibration health management systems, fault prediction capabilities, ground software interfaces, etc.) and establishes criteria for cost effective systems, and guidance regarding best practices for designing propulsion health management systems, Develops appropriate standards for aerospace propulsion system health management equipment and techniques; e.g., types of sensors, identification of signals which should be led to common diagnostic connectors, etc., Develops new requirements and uses for aerospace propulsion system health management to promote sustainable and cost effective operation of air vehicles, and Hosts technical conferences related to health management of propulsion systems. Provide a means to gain regulatory approval for utilizing EHM data in a range of maintenance activities.
|AIR1839||A Guide to Aircraft Turbine Engine Vibration Monitoring Systems|
|ANSI/S2.11||This document is not part of the subscrption.|
|ARINC404A||Air Transport Equipment Cases and Racking|
|ARINC600||This document is not part of the subscrption.|
|FAA/AC 25-1309.1A||This document is not part of the subscrption.|
|FAA/AC20-115B||This document is not part of the subscrption.|
|FAA/AC20-136||This document is not part of the subscrption.|
|FAA/AC21-16C||This document is not part of the subscrption.|
|FAA/AC25-1309.1||This document is not part of the subscrption.|
|FAR21.611||This document is not part of the subscrption.|
|FAR25.1309||This document is not part of the subscrption.|
|ISA-RP37.2||This document is not part of the subscrption.|
|MIL-HDBK-217||This document is not part of the subscrption.|
|RTCA/DO-160C||This document is not part of the subscrption.|
|RTCA/DO-178B||This document is not part of the subscrption.|
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