The Development Of CCD Two-dimension Directed Device Controller Based On DSP

Satellite remote sensing is an important domain of artificial satellite application. Its correlation technique received great attention in world countries. As the FY-1 C/D pole orbit service meteorological satellite triumphantly launched and run on 1999 and 2002, the impact of meteorological satellite of china increasingly grow up, and playing a more and more important role .This project is cooperated by our lab and Beijing Institute of Space Machine and Electricity, the aim of which is to develop a DSP controller of a two-dimension directed device for a satellite inter-space camera, and on this basis, made a research on the Theory & Practice of the control mode of motion control, and finally achieved the aim of improving the dynamic performance and contrail accuracy of system. The research findings finally will have application in the CCD Mapper Sensor of FY-4 meteorological satellite which will be launched off in 2010, The theory and realistic significance of this research is very important for the improving of the image formation technique of china satellite remote sensing .In the integrated design process, this project provided precise Trans function and simple Trans function and brought the integrated scheme. The controller adopts TMS320F240 DSP as its main control unit, using code wheel for angle measurement, using synchronous serial communications interface for the duplexing data communication between the controller and the upper computer, using RS-232 interface for the communication between the pitch axis controller and the azimuth axis controller, and then developed the interface circuit to the motor driver. The hardware of controller has the advantages of high reliability, small sizes and low cost. Using C language to develop DSP program with CC2000 compiler. The software which follows structurization and modularization principles, has the characteristics of better real-time quality, high reliability and maintenance facility. In addition, the interface problem and the logic relative of the superior processor are solved by using a CPLD. After finishing the general planning, the article presents the design concepts, constructions and realizations of each part. At the same time, schematic diagrams and interface circuits were given.Then, the designed controller was adjusted grounding on the working above. The results of the experiment show that the brushless DC Motor servo system controlled by our controller runs well and has the advantages of no overshoot, better real-time quality, good responding and location precision.