Research On The Design And Platform Compensation Algorithm Of A Certain Airborne Radar Control System

In this paper, the design process of a certain type of airborne radar control system and how the applicative platform compensation algorithm can be deduced are presented. With the design of the related software and hardware, this control system is produced initially.First of all, this paper describes the background, the development status of the project through the whole world and discusses the main concern in the project.Then a scheme for the Overall Design of a certain type of airborne radar control system is presented, including the structure of the whole system, the design of the hardware control circuit, the power consumption of the circuit, the estimation of the motor load and the selection of the main components. The hardware control circuit is based on DSP+FPGA for the core controller, in which system the DSP is adopted to realize the core algorithm and FPGA is used as the auxiliary controller. FPGA and DSP are combined with XINTF.Next, FPGA hardware interface circuit is described detailly in this paper. The Virtex-5series FPGA is used for the hardware design platform, and all the interface circuits are designed and developed by Verilog under the development environment of ISE13.1. The concrete circuit design and programming is based on Top-Down structure, divided from top to bottom according to function, which includes 3 RS422 serial port, 1 SSI encoder interface, 1 ABZ encoder interface, 1 RS232 serial port, 1 XINTF interface, 1 DA Interface, DIDO Interfaces and so on.In order to make sure the stability of the platform, a related compensation algorithm is introduced later. In this airborne radar servo control system, the application of compensation ensures that antenna can work steadily during the process of attitude changing by isolating the adverse effects. At first the background of compensation algorithm for the platform is introduced. Then The theoretical derivation of pitch and roll of the platform is introduced. Based on these theories a theoretical compensation algorithm of a composite motion consist of pitch and roll of the platform is discussed, and the DSP implementation of the platform is introduced.At last, this paper introduces the commissioning and debugging of the system, it is mainlyabout functions of FPGA interface, system performance testing and solving problems brought during the process. The functional debugging of FPGA interface contains the debugging of the communication interface, feedback interface, XINTF interface and DA interface. In this way, the correctness and stability of the interface an be guaranteed. The system performance testing consist of testings of current loop, speed loop and position loop. With the adjustment of the related parameters can make sure these three loops work in optimal state. And in the process of debugging, the Load problem of DSP and FPGA,drive enable problem, axis gear drive problem are solved.In the end, in this paper summarized the whole content and all of work has been done, and puts forward the problems and improvement methods.