Study Of Health Simulation And Evaluation Technology For Vehicle’s Control System

The research of integrated vehicle health management (IVHM) technology andflight control simulation technology is aimed at in the paper, the overall framework ofhealth simulation and evaluation research for vehicle’s control system (flight controlsystem) is established, as a starting point, based on the description of component-leveland system-level health status, hierarchical modeling method research is carried out，the work of component-level health simulation and evaluation, system-level hybridsimulation is done, and the entire frame system’s rationality and effectiveness areverified.Around health simulation and evaluation of vehicle’s control system, the mainwork and results include:(1) Starting from functional stratification, health management ways andcomposition, the basic principle of integrated health management for vehicle’s controlsystem is expounded; as a basis, the overall framework of health simulation andevaluation is set up, the system processes treating health model analysis as aprecondition, health model’s establishment as foundations, health status evaluation aspurpose are established.(2) Starting from the idea of functional modeling, the three major components’functional models (steering gear, inertial measurement unit (IMU), and flight controlcomputer (FCC)) of the vehicle’s control system are set up and model calibration isdone, through the effective analysis of health parameters, health mode tables areestablished, mathematical description of health injection ways are presented, healthmodeling work of flight control components is completed. In addition, in order toconverge with the health evaluation, the simulation database is designed and appliedresearch of component-level health simulation technology is carried out based ongenetic algorithm, and the component’s measuring point configuration program isoptimized and validated.(3) Based on data-driven methods, component-level parameter estimation model isput forward, which is able to characterize the mapping relationship between themeasurement vector and the health parameter vector, but a single model is limited bythe principle defect of modeling method, the accuracy is not always high enough, for theissue, a fusion model is set up to improve the accuracy drawing on the decision fusionideological, applied research of component-level health evaluation technology is carriedout based on BP neural network and support vector machine regression, and accordingto the lack of measurement information, self-adjustment factor set is constructed toperfect the fusion model. In addition, according to the health evaluation process (measuring point data→health parameters→health indicators), the component-leveland system-level health indicators are listed.(4) Each component’s health simulation is often carried out in the respectiveprofessional design software, view of this situation, system-level hybrid simulation isput forward as a solution idea, including the creation of simulation model in thecomponents’ professional design software and output behavior model based ondata-driven method, demands for integrative modeling of system-level health simulationare achieved, which laid the foundation of creating health behavior model forsystem-level simulation, and a preliminary exploration of the system-level hybridsimulation is carried out based on the PID control circuit.