Design Of The Special Controller For Adjustment Mechanism On The High Precision Antenna Side

In recent years, with the rapid development of computer technology and electronic technology, in order to meet the demand of modern communication equipment, antenna is need to develop indifferent directions, the continuous improvement of the emergence of reflector antenna is the antenna working frequency results. Antenna at work, requires accurate tracking of target acquisition, on the need to support platform has high running accuracy and stiffness and fast dynamic response characteristics. With the rapid progress and completion of control technology, the motion controller has been accepted by more and more industry domain as an independent automation control product because of its fast response, high control precision, smooth motion and price and market foundation advantage. Have been widely used in aerospace, robotics, textile, machine tool, military etc.The research object of this thesis is the side antenna high precision adjustment mechanism, it mainly used in reflector antenna of large caliber and high frequency segment. Especially for the antenna system in the process of operation, high precision antenna system needs the side at the same time path to movement according to the certain requirements of the trajectory. The mechanism installed six axis adjustment platform to realize side in the movement of the space, so as to ensure the electrical performance of antenna, and when the antenna in the process of operation, the side can form a curve in space, and according a certain trajectory movement. Therefore, through the common scheme of multi-axis motion controller after the analysis and comparison,the paper finally proposes a "ARM+FPGA" special motion controller design scheme,and complete the development of specific hardware and software.In this thesis, the design of the six degree of freedom platform control system using the "PC+special motion controller " in the form of. The PC software according to the request of movement to planning movement trajectory, send the control command,through the RS-232 serial communication transmitted to the motion controller, it parsing instruction,then send the motor commands to the servo drive through the CAN bus. The special motion controller is composed of ARM Cortex-M3(LPC1769) and FPGA(EP2C5T144C8) and its peripheral circuit, the LPC1769 as the main CPU, make full use of its high performance and ultra low power consumption and characteristics of CAN channel. According to the function and performance requirements of adjustment mechanism, the hardware circuit of motion controllers were designed in detail, include power module, ARM processor module, FPGA module,communication module, CAN module, SSI interface module, limit protection module. The software mainly through the preparation of the ARM controller to realize the analysis, communication and motor control function, and uses VHDL hardware description language in the FPGA to realize the SSI interface of magnetostrictive displacement sensor signal detector, limiting the protection logical function.Through the above work,after the motion control platform is completed, testing the special controller for functional and performance, and test the adjustment precision motion control platform, the test results indicate: the side surface of the high precision antenna adjustment special motion controller smooth operation, high reliability and precision can meet the predetermined requirement.