Research On Probabilistic Robust Control Of High Speed Aircraft Based On Improved Fireworks Algorithm

In recent years,research on high-speed aircraft has gradually become a major research direction in the aerospace field.With the rapid development of related supporting technologies,the flight environment faced by high-speed aircraft is becoming more and more complicated,and the uncertainty in the flight process is also increasing.Therefore,more stringent requirements have been imposed for robust control methods which are suitable for high speed aircraft.However,the traditional robust control method is more conservative in the processing of uncertainty in the flight control system,and it is difficult to simultaneously consider the robust stability and other control performance of the aircraft.This paper has carried out related research on high-speed aircraft with uncertainty.The main work is as follows:Firstly,the commonly used coordinate system is defined and the conversion relationship between coordinate systems is derived.The atmospheric environment during the flight of high-speed aircraft is introduced.The six-degree-of-freedom model of the aircraft is established according to Newton's law of motion.Then,the secondary factor was neglected to establish the linear deviation model of the aircraft,which laid the foundation for the design of the controller and the six-degree-of-freedom simulation experiment.Secondly,this paper proposes a novel approach of ?-suboptimum tracking guaranteed cost controller applied for the high-speed aircraft longitudinal attitude model.Then,in order to solve the problem that the robust reliability of the verification system requires a large amount of time-consuming Monte Carlo simulation,this paper introduces the reliability theory into the design of the robust controller,and a probabilistic robust control method is studied.Then,for the optimization problem of probabilistic robust controller,a robust controller optimization method based on improved fireworks algorithm is studied.By introducing the mutation and crossover operation in the differential evolution algorithm,an improved fireworks algorithm is proposed.According to the performance requirements of high-speed aircraft,the improved fireworks algorithm is used to optimize the probabilistic robust control parameters.Finally,the six degrees of freedom simulation of high-speed aircraft is carried out for the probabilistic robust controller design method based on improved fireworks algorithm.The feasibility and effectiveness of the proposed method are verified.