基于新型空間有效載荷數據吞吐量大、運動控制精度高與低功耗、輕量化之間的矛盾， 采用內部自帶DMA 控制器的DSP 芯片加FreeRAM 型FPGA 器件構建控制器平臺、AQBISS 接口電場編碼器作為位置反饋元件，并研制了試驗樣機。樣機性能測試結果表明，使用DSP 片內DMA 控制器從FPGA 片內FIFO 讀取數據，CPU 占用率降低至20%；應用MxN 排序搜索算法計算編碼器絕對位置，編碼器測量精度達到16 位光電編碼器水平。
關鍵詞：有效載荷控制器 DSP FPGA 電場編碼器 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