Research On The Control Methods Of Three-axis Simulation

As the hardware for simulation and measurement of inertial sensors, three-axisturntable is indispensable. Its accuracy not only affects the test results of inertialcomponent, but also ensures the accuracy and performance of aerospace.This paper analyzes the required performance of overall system of the turntable, andgives the structure of its software and hardware. Then select the motors, sensors and soon. Based on the existing difficulties in actual control, the article has done several aspectsof work as below.Firstly, based on the theoretical of Kinetic equation and Transformation Theory, thispaper derives the dynamics model of three-axis turntable control system. As the model isa strongly coupled non-linear model, the method of state feedback and dynamiccompensation to decouple the control system is proposed in order to make the design ofcontrol system easier.To achieve the proposed indicators, this article designs the control systems of eachframework, which are double closed-loop control systems including the speed-loop andposition-loop. Correcting speed loop can decrease its response time. In position-loopcontrol system this paper uses PID, fuzzy PID control methods. To increase the systembandwidth but does not change the stability of the system at the same time, this paperproposes a hybrid control strategy.As the PID and fuzzy PID control methods have limitations, we proposes a bacterialfeeding method to optimize the PID parameters.Finally, the paper introduces four kinds of friction models frequently used in thecontrol system, according to the data measured of turntable, friction model is established.In order to overcome adverse effects of friction, the article proposes to use theacceleration feedback control program.