Weighted grey target theory based fault-tolerant motor health status assessment method

Abstract

The invention discloses a weighted grey target theory based fault-tolerant motor health status assessment method. The method includes the steps of 1), introducing a grey target theory, setting a grey target under the condition of no standard model and finding out a target center from the grey target; 2), selecting a frequency band energy value of a fault-tolerant motor electromagnetic torque as a status indicator of health assessment; 3), adopting a wavelet packet-grey neural network method to further predict the frequency band energy value to obtain a pattern sequence to be identified prior to grey target transformation and target center degree calculation; 4), based on the target center degree classification principle, subjecting health status of a fault-tolerant motor to quantitative classification; 5), meanwhile considering weight of different frequency bands during assessment of the fault-tolerant motor health status, adopting grey contribution degree to improve the grey target algorithm, judging out the degree of good or bad status a system is in, providing quantified system health status, and laying a foundation for formulating fault tolerant transient control strategies.

Description

technical field [0001] The invention relates to a method for measuring the health state of a fault-tolerant motor based on weighted gray target theory. Background technique [0002] The electric actuation system is one of the key technologies for multi-electric aircraft and all-electric aircraft. It is widely used in aircraft control, environmental control, wheel brakes, fuel and other key systems that affect flight safety. Therefore, it is required to In addition to high reliability and high fault tolerance, different systems have other requirements for the electric actuation system. For example, the control system also requires the electric actuation system (mainly referring to the motor) to have a large speed regulation range, fast start and braking. And strong anti-interference ability, etc., its performance directly affects the safety of the aircraft. At present, the fault-tolerant structure design of the drive motor and its drive control circuit has become the key to ...

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Problems solved by technology

[0004] In recent years, although my country has done a lot of work and achieved many results in health management, it is generally the overall structure and process design of the health management system, and the research on the health management of key airborne components of the aircraft. It is not deep enough, especially the research on the health monitoring and management technology of the electromechanical actuation system, which is closely related to the flight safety and combat effectiveness of fighter aircraft, has not yet started, and there are many gaps with countries such as the United Kingdom and the United States

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