电机转速自适应测量方法及其在DSP上的实现

本文在分析几种常用的基于编码器测速方法的基础上,提出了一种高性能的自适应速度测量方法。该方法选择一个可变的时间周期和编码器脉冲数来测量单位时间内的编码器脉冲数,再通过简单的计算得到转速的测量值。数字信号处理器(DSP)芯片集成有正交脉冲编码电路,并且数据处理速度快,实时性强。本文中提出的方法在电机控制专用DSP芯片TMS320 LF2407A上进行了实现。实验研究表明,可以在提高低速时的测速准确度的同时,提高系统的响应时间。该方法已经在自主研发的全数字伺服驱动系统中得到了成功应用。

By analyzing and comparing the existing ways of measuring velocity, the paper proposes a highperformance adaptive velocity measurement. The proposed method selects a variable time period and pulses of encoder to measure pulses in unit time, then gets velocity by simple computation. The Digital Signal Processor (DSP) includes quadrature encoder pulse (QEP) circuits, it is very quick at data processing and has strong real time feature. The proposed method is implemented based on motor control DSP chip TMS320 LF2407A. Finally the results of experiments show that the proposed method can increase the speed measurement accuracy even at very low speed and the system response times at the same time, compared to currently known method. It has successfully been used in full digital servo drive system.

中国科学院知识创新工程重大(KGCX-SW-15)