Research On Load Simulation And Measurement Test Platform For A Weapon Tracking Syste

The load simulation and measurement test platform of the weapon servo system is used to simulate the real load of the gun control system in the actual working environment,so as to complete the preliminary debugging of the gun control system under laboratory conditions.This platform is also called an electric load simulator.In this platform,the gun control system,as a load-bearing system,will be subjected to various different loads imposed on it by the loading system in the electric load simulator,thereby completing the semi-physical simulation experiment of the gun control system.Therefore,designing a test platform with fast response speed and high loading accuracy has very important engineering significance.The control strategy of the loading system in the electric load simulator is studied in the paper,and in the meantime,the hardware and software parts of the load simulator platform,and a load simulation and measurement test platform for a certain weapon follow-up system are designed and built respectively.The main content includes the following parts:(1)Introduce the basic components of the electric load simulator.Based on the analysis of the permanent magnet synchronous motor,the mathematical model of the loading system and the carrying system using it as the actuator is established,and the overall model is obtained after the two are coupled.(2)Starting from the three aspects of excess torque,friction and clearance,the factors that affect the loading accuracy and response speed of the electric load simulator are analyzed.Aiming at the existence of excess torque,the angular velocity feedforward compensation method is adopted to suppress its influence on the loaded motor.Among the non-linear factors,friction and clearance have a greater impact,so the dead zone inverse and disturbance observer methods are designed respectively to compensate for their interference to the loading system.(3)According to the control strategy of permanent magnet synchronous motor,combined with the advantages of strong sliding mode robustness,a further design is made.Firstly,a new approaching law is designed to reduce the problems caused by the "chattering" of sliding mode.Then an improved sliding mode observer is designed to realize non-inductive high-precision motor control,thereby improving the system’s adaptability to environmental factors.(4)The software and hardware design are introduced to the two parts of the load simulation and measurement test platform of the servo system.The software part is designed with a visual interface,which can instantly display the working status of the system.The hardware part combines the system function requirements,selects the appropriate type of equipment,designs the relevant circuits,and develops the platform plan.On the basis of the built experimental platform,a semi-physical simulation experiment was carried out.Based on the establishment of a mathematical model,the thesis mainly analyzes the problems of the load simulation and measurement test platform of the servo system,and uses feedforward compensation,sliding mode control and other strategies to improve the system loading accuracy.Finally,the semi-physical simulation experiment proved that the follow-up load simulator designed in this paper can meet the design index requirements and has a certain practicability.