Research On The Dynamics And Control Of An Air Defense V-MRLS On The Move

With the change of modern warfare mode,new requirements have been put forward for the combat mode of vehicle-mounted multiple rocket launcher system(V-MRLS).The improvement of processing technology and the development of rocket guidance technology have made it possible for V-MRLS to achieve firing between marches.The V-MRLS firing on the move tuning accuracy is more fixed firing not only considering the gas jet,but also the influence of nonlinear factors such as road excitation and vehicle suspension at different road grades.It has become an important direction in the field of rocket launcher research to study the design deviation of rocket launcher tuning and firing process through firing dynamics control,and then improve the accuracy of rocket launcher firing.For the complex system of V-MRLS,the main problem of designing a high-precision control strategy is how to ensure the accuracy and robustness of the system under the action of different road levels and random excitation.In this paper,we use a vehicle-mounted anti-aircraft multiple rocket launcher system,which is a system with strong nonlinear characteristics and uncertain external perturbations,as the object of research,and adopt the control scheme of V-MRLS dynamics with permanent magnet synchronous motor as the actuator through the study of dynamics control theory and technology.The main contents of the paper are as follows.(1)Establish a V-MRLS firing dynamics model based on multi-body system dynamics theory,analyze the mathematical model of permanent magnet synchronous motor in detail,design a PID controller for the pitch and slew mechanism with this actuator,and perform simulation calculations on the system,the results show that the system can achieve good control effect under the condition of small external interference,and after the external input conditions change,the system The performance deteriorates after the external input conditions change.Therefore,a new control strategy is needed to improve the robustness.(2)Since the V-MRLS is characterized by large changes in parameters and loads,and strong uncertainty of external disturbances,PID control cannot meet the requirements of accuracy and robustness,and the sliding mode control method is proposed to overcome the system uncertainty.However,the sliding mode control has the problem of jitter,which needs to be further studied to suppress the jitter while taking into account the system performance.(3)The fuzzy adaptive control method is combined with the sliding mode variable structure control to overcome the uncertainty of the system,and the fuzzy adaptive real-time estimation of the boundary of the external disturbance to maintain the accuracy and robustness of the control system,while minimizing the jitter phenomenon.The simulation results show that the control method effectively reduces the static error of the system,enhances the robustness of the system,and suppresses the jitter to a certain extent.In this paper,we study the dynamics and control method of the V-MRLS,and discuss the accuracy and robustness of the servo system of V-MRLS,and the adopted method and conclusions are of certain reference value for the tactical index of V-MRLS.