Stability Study For A Multi-Electric Aircraft Power System

Driven by the demand to cope with the environmental pollution and reduce the cost of aircraft operation,the aircraft industry is making great efforts to develop more-electric aircraft(MEA)technology.More electric aircraft technology aims to use more efficient and more reliable electrical power to replace the conventional hydraulic,pneumatic and mechanical power,thus to reduce the volume and weight of the aircraft,improve fuelburn efficiency,reduce gas emissions and alleviate environmental problems.Typically,the incremental input impedances of these loads are negative,which would eventually reduce the system damping and make the system more prone to oscillation.Therefore,the stability issue of the power system of a more electric aircraft has becoming the research focus worldwide.The stability of a multi-electric aircraft is embodied in the analysis of the static and dynamic characteristics of its power system.For the specific multi-electric aircraft,this paper first studies the physical characteristics of the key actuators in the power system,and establishes its mathematical model.Then,using Taylor series to carry out small signal linearization processing,realizes the linear small signal with its dynamic characteristics.The model is analyzed.The stability analysis of the system is carried out by using the eigenvalue method.The stability boundary of the system is determined.At the same time,the stability of the system is analyzed when the system parameters change.The parameter design suggestions for ensuring the stability of the system are obtained.The static characteristics of multi-electric aircraft is to establish the Monte Carlo reliability model of its power system,and then apply the information entropy algorithm to obtain the reliability analysis of the gas power system,and theoretically prove the efficiency of the information entropy based reliability analysis method.Feasibility;Finally,the algorithm is implemented by an example,and the result provides an important reference for the stable operation of the system.In this paper,the simulation model of the research system is established in Matlab/Simulink and simulated.The simulation results finally verify the correctness of the stability analysis and parameter optimization selection theory.