Research On The Control System Of The Precision Centrifuge In The Composite Platform Body

Foreign research institutions use test system composed of composite structure ofcentrifuge and linear vibrator to simulate spacecraft launch or reentry of overloadingand vibration in complex dynamic environment, this composite form of equipmentcan provide more realistic environmental conditions, while also revealing complexstate and damage which can indeed occur during flying or lanching.Simulating such acomplex and dynamic environment will help raise awareness of the complex anddynamic environment, establish precise error coefficient, improve the measurementaccuracy of inertial instrument, increase research capacity and research tools,implement research on consistency of heaven and earth.This subject main researches key technology problems of precision measurementand control on precision centrifuge, such as the structure form of centrifugal machinesystem, precise angular position measurement, a embedded controller design basedon DSP, real-time communication between PC and DSP controller, and systemsimulation test analysis, the software and hardware design of centrifugal machinecontrol system, debugging problem of experiment turntable,and centrifugal machinecycle disturbance of features, control strategy of suppressing periodic interferenceand so on.Centrifugal machine control system which is targeted at the realization of anembedded controller in-depth studies real-time controllers based on DSP and FPGA,Key technical problems involved in the implementation process include design anddebugging of the system, the implementation process of the closed-loop simulationsystem and system implementation. This subject carries out research work includingangular position measurement of centrifuge components, the main controller,communication modules, DA conversion, closed-loop simulation system forverification, motors and drives, and several other key modules.The subject models the control system on centrifugal machine, studies the keyissues such as small phase margin of control system, low mechanical resonancefrequency and limited bandwidth.It also designs advanced tuning controller andanalysis the centrifuge simulation system. The subject carried out debugging andclosed-loop frequency response testing on the experiment turntable. when debuggingthe experiment turntable system we finds a large number of problems such as largeand resonant peak, the high bandwidth and soft stiffness in the mid-range and lowfrequencies. In order to solve these problems the subject proposes solutions andimplements the solutions on the experiment turntable.The aboving work makes goodpreparation for the centrifuge systems.Control system program design researches on how to realize tuning controller and realizes precise control of speed and position. centrifuge control system is basedon industrial control computer. the subject designs control interface in the PC andrealizes the real-time detection and control of DSP, completes the monitoring taskssuch as human-computer interaction and complex data management system.Embedded controller FPGA Module implements a precise angular position resolution,and communicats with the DSP controller.Considering the problems of dynamic unbalance and motor ripple torque whichaffects system performance, the subject uses repetitive control strategy to makedisturbances rejection control, designs repetitive controller and makes simulationanalysis, analysis and tests the repetitive control system performance. the abovingwork provides references for the actual system...