Abstract
This paper presents a novel intelligent fault-tolerant control method for a kind of more electric aircraft AC/DC hybrid electrical power system, in order to ensure the safe operation of the engine and improve the power supply quality. The more electric aircraft electrical power system was combined with an aircraft engine, two generators, two AC/DC rectifiers, two DC/AC inverters, DC loads, and AC loads. A multi-objective optimization intelligent sliding mode fault-tolerant controller was obtained for aircraft engine with actuator faults. Each of AC/DC rectifiers is 12-pulse autotransformer rectifier unit with active power filter. Active power filter was used to realize the desired performance of DC bus. Intelligent fractional order PI controller is presented for AC/DC rectifier by considering multiple performance indexes. In order to guarantee the AC-side has satisfying voltage, current, and frequency, no matter the sudden change of AC load that happens or DC/AC fault that occurs, the virtual synchronous generator control method was used for DC/AC inverters. Simulation results verify the effective of the proposed more electric aircraft AC/DC hybrid electrical power system.
Highlights
In conventional aircrafts, secondary energy sources include hydraulic, pneumatic, and electrical energy
An intelligent faulttolerant control (FTC) method is presented for a kind of more electric aircraft (MEA) alternating current (AC)/direct current (DC) hybrid electrical power system in this paper
A multi-objective optimization Intelligent sliding mode fault-tolerant control (SMFTC) method is proposed for aircraft engine, with fault actuators being considered, to ensure that the states of aircraft engine have strong robustness and fault-tolerance performance
Summary
Secondary energy sources include hydraulic, pneumatic, and electrical energy. It is necessary to design suitable control methods for MEA electrical power system including aircraft engines. Reference [24] used an adaptive tabu search algorithm and neural network to control the active power filter (APF) in MEA, making the AC power frequency be 400Hz. with the increasing complexity of modern engineering systems, the possibility of occurring faults increases as well. The purpose of this paper is to present a AC/DC hybrid power system for MEA and the corresponding intelligent FTC method, to ensure the safe operation of the engine, improve the power supply quality, and achieve multi-objective optimization of the system. The presented MEA AC/DC hybrid power system can meet the demand for electrical energy and safe operation of engine, while taking into account the diversity of electrical equipment on MEA
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