High Quality Velocity Detection of Incremental Encoder for Servo Drive

Abstract:

Considering the contradiction of detection speed and detection accuracy of incremental encoder, a novel digital velocity detection N/S algorithm is proposed in this paper. The algorithm of velocity detection mainly consists of two parts: the pulse sliding counting and velocity synchronous updating. In order to reduce the pulse-detection time delay, the pulse-sliding-counting method is used to count the encoder pulses during the sampling period, and the pulse-pattern sequences are obtained sequentially. In order to improve the accuracy of velocity detection, synchronization of velocity updating and pulse-mode alternation is applied, which reduces the calculation error caused by asynchronization of velocity updating. The experimental results are shown to demonstrate that the measurement speed and measurement accuracy are improved simultaneously by using of the proposed algorithm.

• Periodical: Advanced Materials Research (Volume 1039)
• Pages: 320-327
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1039.320
• Online since: October 2014
• Authors: Jie Jin, Su Rong Huang*
• Keywords: Incremental Encoder, N/S Method, Pulse Sliding Counting, Synchronous Sampling, Velocity Detection

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