新型空间有效载荷控制器接口设计

Interface design of new type space payload controller

基于新型空间有效载荷数据吞吐量大、运动控制精度高与低功耗、轻量化之间的矛盾,采用内部自带DMA控制器的DSP芯片加FreeRAM型FPGA器件构建控制器平台、AQBISS接口电场编码器作为位置反馈元件,并研制了试验样机。样机性能测试结果表明,使用DSP片内DMA控制器从FPGA片内FIFO读取数据,CPU占用率降低至20%;应用MxN排序搜索算法计算编码器绝对位置,编码器测量精度达到16位光电编码器水平。

Future space payload required that controller should have more faster data-through,more higher movement control precise, more lower power and more smaller size than ever. To solve the problem, a new type controller was devised based on DSP with built-in DMA controller and FPGA containing FreeRAM in this paper, moreover, we used AQBISS interface electric field encoder as position feed-back component ,then developed prototype. The performance test indicates that CPU overhead is reduced to twenty percent by reading data through DSP＇s inner DMA controller and FIFO built-in FPGA, the resolution of electric rotary eneoder equals to opto-electrie eneoder with sixteen bits by using the MxN order search algorithm.