新型空间有效载荷控制器接口设计

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。
关键词：有效载荷控制器 DSP FPGA 电场编码器 AQBISS
Abstract: 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 encoder equals to opto-electric encoder with sixteen bits by using the MxN order search algorithm.
Keywords: payload controller, DSP, FPGA, electric field encoder, AQBISS