针对交流伺服系统高速高精度的控制需求,设计了一种基于DSP和FPGA的高速数字控制器,并通过高速USB接口与上位机进行高速数据交互. 以DSP为核心控制器,完成控制算法、SVPWM计算;以FPGA为辅助控制器,控制FT245 RL高速USB通信模块,便捷实现以USB为接口的交流伺服系统与上位机之间实时数据的高速传输;上位机采用LabVIEW虚拟仪器技术编写,实时监测交流伺服系统运行状态,并对速度环控制参数进行自整定运算,将整定后的控制参数实时发送给数字控制器. 实验结果验证,上位机监测实时准确,控制参数整定正确,交流伺服系统响应速度快、控制精度高、稳定性好,具有良好的实用性.%According to the control demand of AC servo system with high speed and high precision, a digital controller based on DSP and FPGA was designed and the high-speed USB interface as the means of interac-tion between the AC servo system and PC. A DSP was used as core controller to complete computing the control algorithm and SVPWM. A FPGA was used as auxiliary controller to control the high speed USB module of FT245RL, the PC and servo system with the USB interface have efficiently realized high speed real-time data interaction. The parameter data of the AC servo system was monitored and analyzed by Lab-VIEW virtual instrument in PC. The PC executed the speed loop auto-tuning algorithm and sent the tuned control parameter to the digital controller through USB. The experimental results verify that the PC monitor real-time and accurate, control parameter tuning correct, the AC servo system has high control precision, stability. The system has good practicality.
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