Research On Efficiency Evaluation Method Of More Electric Aircraft Electromechanical System

Electromechanical system is an important part of the more electric aircraft.Comprehensive performance of electromechanical system is a necessary prerequisite for flight,upgrade and maintenance of aircraft,which directly affects the completion degree of a given task.Reliable performance evaluation is helpful to analyze the actual operation,the structure and function design of the electromechanical system.Also,it is a powerful tool to study the system’s ability that needed to complete the task.In this paper,the energy-oriented more electric aircraft electromechanical system is the research object.Started from improving the reliability of efficiency results,systematic research is carried out on the effectiveness evaluation method of the electromechanical system.Firstly,an efficiency evaluation method of the aircraft electromechanical system is discussed,which is composed of index system design and evaluation system design.The overall efficiency evaluation method is analyzed.Basic theories of energy distribution and flight stage characteristics of the electromechanical system are studied.Then,detailed effectiveness index system has been designed.Combining with the structure and function of the aircraft electromechanical system,the energy distribution of electromechanical system is studied.And based on the task characteristics of electromechanical system efficiency,a construction mode of efficiency evaluation index system for electromechanical system is constructed.According to the model,the performance evaluation index system of more electric aircraft electromechanical system based on energy is developed.At the same time,the effectiveness evaluation system is studied in detail.Combined with belief graph and grey correlation theory,the reliability calculation and unified expression of qualitative and quantitative index data are realized.The relative weight of the index system is analyzed by using the combined weight method of AHP and entropy weight method.By using extended Bayesian theory and linear weighting method,the index data fusion and system comprehensive efficiency are studied.Finally,an evaluation example is set up by using the distributed simulation platform of a more electric aircraft electromechanical system.The proposed efficiency evaluation method system is applied.Experiment results show that the proposed efficiency evaluation method system is stable and feasible.The performance evaluation software of electromechanical system of more electric aircraft is designed by MATLAB software.The function of efficiency evaluation method system proposed in this paper is realized.It provides an auxiliary tool for studying the efficiency of electromechanical system of more electric aircraft.