Application of virtual instrument based on CAN bus in multi-motor control system
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摘要: 将虚拟仪器的概念应用到多电机控制系统中,对电机的运动轨迹、电流特性进行实时监控以达到最优控制.采用基于CAN(Controller Area Network)总线的主从式分布结构,在产品研发过程中虚拟仪器取代电机控制中心成为主节点,完成对各个电机控制单元的调试和测量.利用CAN卡和Visual Basic完成了虚拟仪器系统的开发,实现了电机控制算法的实时调节、控制效果的数字化和图形化评估、DSP(Digital Signal Processor)和FPGA(Field Programmable Gate Array)程序的在系统升级以及各种测试环境的模拟,显著提高了某型号X光机的研发效率和产品质量.Abstract: The concept of virtual instruments was applied in a multi-motor control system to monitor each motor’s movement track and character of current, in order to realize optimal control. The multi-motor control system adopted client/server structure based on controller area network (CAN) bus, and the virtual instrument became the host unit replacing the motor control center in the development phase to debug and measure each motor control client unit. The visual instrument was built using CAN card and visual basic. It could adjust proportional-integral differential(PID) parameters of motors controller online, show the result digitally and graphically, update the digital signal processor (DSP) and field programmable gate array (FPGA) program on board and emulate some testing environment, and dramatically improve the development efficiency and product quality of certain type of X-ray machine.
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Key words:
- electric machines /
- control /
- virtual instrument
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[1] 汪海波, 黄宜坚, 王 伟. 基于VI的圆盘式电流变传动机构测控系统[J]. 仪表技术, 2001, 5:12~13 Wang Haibo, Huang Yijian, Wang Wei. Detecting and controlling system of the electrorheological disk actuating mechanism based on VI[J].Instrument Technology, 2001, 5:12~13(in Chinese) [2] 李怀洲, 陈 离, 杨永才. 基于LabVIEW的虚拟PID调节仪[J]. 仪表技术,2004,2:15~16 Li Huaizhou, Chen Li, Yang Yongcai. Virtual PID adjuster based on LabVIEW[J]. Instrument Technology, 2004, 2:15~16(in Chinese) [3] Prichard M S. Advanced multi-functional testing via virtual instrument . IEEE Systems Readiness Technology Conference . Anaheim:Institute of Electrical and Electronics Engineers Inc, 2003. 452~454
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