Design Of The Magnetorheological Shimmy Damper Controller And Research On Fuzzy Algorithm

With the rapid development of the aviation enterprise,aviation safety is becoming more and more important.The shimmy of the aircraft landing gear is an important part of the safety problem.The shimmy damper is used in modern aircraft to solve the problem of shimmy.The traditional oil damper can only eliminate the shimmy by consuming energy passively.In view of this situation,the research is focused on the magnetorheological damping device which can be controlled by semi-active control.The feasibility and superiority of the magnetorheological damping device are determined.Based on the magnetorheological shimmy damper which is designed in the research group,the controller with fuzzy control algorithm is designed and completed.The good performance of the controller is determined by the shimmy experiment.The main contents of this paper are as follows:The first is Simplified model of magnetorheological damper,and the control model is established by system identification.The second is a control algorithm: It is difficult to accurately determine the magnetorheological damper model.Accordingly,fuzzy control algorithm is chosen.In order to make the algorithm easy to use,PID control is added to the algorithm.It is determined that the algorithm is adaptive fuzzy PID control finally.The simulation results show that the algorithm is feasible.The third is the controller: The controller is designed and made.The controller design is divided into hardware and software parts.The hardware is miniaturized as much as possible in device selection and assembly.The function of modifying the program and collecting the data is realized in the software part.The last part is the experiment: The experiment was divided into vibration damping experiment and taxiing shimmy experiment.The vibration damping experiment proves that the performance of the shimmy damper can satisfy the controller.Taxiing shimmy experiment shows that the control effect is satisfactory with the controller.The experimental results shows that the control algorithm of the controller can make the damping force of the shimmy damper in a good range by adjusting the output current in any time.When the damping force is in this range,the effect of shimmy damper is Satisfactory.It shows that the controller has good following.