Circuit Design And Development Of Seeker Servo Control System Based On DSP+FPGA Platform

This topic is derived from the development of an optical seeker servo control system.The circuit design and FPGA interface development of the seeker servo control system are introduced in the thesis,and the Crosstalk phenomenon between parallel lines on PCB is analyzed and simulated.First,the overall design of the seeker servo control system is carried out according to the requirement of functions and performance indicators,and comes up with the proposal of hardware design which using DSP and FPGA as the controllers.The key components are selected according to the overall circuit design and the estimation of load moment.On the basis of contents above,the design and simulation verification of the loop control structure of the system are completed.Secondly,the Crosstalk phenomenon is analyzed and simulated.The four factors of influencing Crosstalk phenomenon are simulated and analyzed separately according to the formation mechanism of Crosstalk phenomenon between parallel lines on PCB.The countermeasures to suppress Crosstalk phenomenon are put forward based on the results of simulation and engineering experience.Thirdly,the circuit design and PCB design of the system are mainly completed.The detailed circuit design of the control circuit board and the decoding circuit board are performed respectively according to the division of circuit function.On the basis of referring to the countermeasures against crosstalk phenomenon,the two PCBs are designed respectively.Fourthly,the FPGA interface modules are designed in detail.Two key technologies that state machine design and detection of signal edge used in FPGA development are introduced.The clock module,RDC interface module,communication interface module,gyroscope interface module,driver interface module,DI interface module and XINTF interface module are designed and the functional simulations of them are carried out respectively.Fifthly,the debugging and testing of the system are finished.The loop control structure of the system is closed-loop debugged on the basis of finishing the debugging of the control circuit board and the decoding circuit board respectively.The debugging of the main functions of the system and the testing of performance indicators are completed finally.