The Research And Design Of The Turntable Balance Wheel Control System

Space-borne two-dimensional turntable is the rotating device which installed on thesurface of satellite to bear the optical detection equipment. When two-dimensional turntabletracks the target fast, it will bring the counteractive torque to the satellite. Because the rotaryinertia of the satellite is smaller，this torque will disturb the attitude of satellite, even bring thesatellite out of control. In order to reduce or eliminate the interference of the torque，Balance-wheel device must be installed in the two-dimensional turntable to offset theinterference torque. However, there is noise and interference in the Balance-wheel controlsystem, such as friction interference, speed measure noise and so on, which give disturbanceto the attitude control system. To solve this problem, reasonable control algorithm and controlcircuit should be designed. Based on the project of “Balance-wheel control system design”,the realization and design of circuit and controller for Balance-wheel is described and theBalance-wheel control system is deeply researched in this thesis.In the first place, the outline and the dynamic model of Balance-wheel are given. Thenthe torque mode and speed mode Balance-wheel control system are designed and elaborated.Then we did depth anlysis for the motor (brushless DC motor)’s structural principle andcontrol strategy of Balance-wheel system.And the velocity measurement system which to thecore of Resolver is deeply researched.The dissertation mainly discusses the design of Balance-wheel’s speed closed-loopcircuit controller, includes the design of main performance index of system,controlscheme,each components and interface,etc. In which,the integtated control chip MSK4310constituted the core of the driver module of the system; integtated chip AD2S80, AD2S99constituted the core of the speed feedback control circuit system;analog circuit speed PIcontroller is designed based on op amp integrated circuit LM324. The results of experimentindicate that the hardware system can meet the mission requirements.