Improved Health Evaluation Method of Composite Space Electromechanical Actuator Based on Impact Factor and Single Concave Function

Electromechanical systems must have high reliability, high safety, and high maintainability. It is of great significance to prevent the overall failure of the aircraft caused by the failure of the mechanical and electrical system components and to carry out condition monitoring, rapid fault diagnosis and positioning, accurate prediction of faults, and evaluation of the remaining life of key components of the electromechanical system. After combing and analyzing the typical fault mode and fault characteristics of electromechanical actuators and its fault characteristics, this paper analyzes the traditional layer-by-layer mapping method based on Euclidean distance in the composite space and finds that its practical application in the health evaluation of electromechanical actors has some shortcomings. Therefore, on this basis, an improved layer-by-layer mapping evaluation method based on impact factor and single concave function mapping is proposed, and the advantages of the improved layer-by-layer mapping evaluation method over the traditional layer-by-layer mapping method based on Euclidean distance are verified through simulation experiments.