The Research On Control Compensation Method Of Electro-hydraulic Servo System Of Aircraft Steering Gear

The electro-hydraulic servo system of aircraft rudder is a ground simulation equipment to simulate the load change in the real operation process of the rudder.It can test the performance of the rudder under the laboratory conditions,and has the characteristics of non-linear and time-varying.In the actual working process of the system,there will be errors between the output value and the expected value,which is the surplus force.The existence of redundant force has a serious impact on the stability,loading accuracy,response speed and other important performance indexes of the system.Therefore,it is of great significance to study the electro-hydraulic servo system of the aircraft rudder how to combine the structural characteristics of the system to minimize the interference of redundant forces and improve the control performance of the system.Based on the analysis of the research status of the surplus force suppression method of the electro-hydraulic servo system of the aircraft rudder at home and abroad,the structure and working principle of the system are studied firstly,and the overall mathematical model of the system is obtained by establishing the mathematical model of the main components.Secondly,an improved artificial bee colony algorithm is proposed,which adopts cloud model and variable neighborhood search as the selection strategy and method of bee observation stage,to solve the problem of lack of diversity of algorithm and easy to fall into local optimum,which not only keeps the exploration ability of algorithm,but also enhances the mining ability.Then,the PID controller parameters are self-tuning on-line by using the improved artificial bee colony algorithm to control the electro-hydraulic servo system of the aircraft rudder,so as to realize the precise tracking of the command force of the rudder in the complex dynamic environment.Finally,the simulation results show that the method can meet the requirements of the control performance of the electro-hydraulic servo system of the aircraft rudder.Compared with the traditional artificial bee colony algorithm,the method has better tracking ability and redundant force suppression effect,and has a certain application value.