Extracting Fine Position from Sinusoidal Encoder Using Tracking Loop Method
Haitao Qin · Computing Technology and Automation · 2011
The accuracy of position sensor directly affects the servo control performance,currently extracting fine position from sinusoidal encoder is the primary means to obtain high-accuracy position.For such disadvantage,the algorithm of Extracting fine position is time-consuming,this article research on the implementation and the tracking loop method for extracting fine position from sinusoidal encoder,providing the block diagram of the algorithm and the design parameters to reducing the computation time,it greatly improves the speed range and the accuracy of position.Finally this algorithm is implemented on the ARM processor,the sampling frequency is up to 500kHz,each performance meet the requirements of servo position sensor,with a very high value.