Identification, Modeling, and Filtering of the Quantization Error in Encoder Equivalent Output

Encoder equivalent output is widely used in modern industrial drives equipped with tools for improving the encoder resolution. A standard application for this output is electronic gearing for controlling slave amplifiers via the encoder equivalent output of a master drive. If left uncorrected, this noise would report unreal noise to the user, or lead to unstable motion in electronic gearing applications. This invention, provides a mathematical deterministic estimator for modeling the noise harmonics. Experimental data has been used in identifying this artifact and validating the deterministic noise estimator. Noise characteristics such as speed and update rate dependency are illustrated with both experimental and numerical results.

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For Information, Contact:
Mike Miller
Senior Licensing Manager
Virginia Tech Intellectual Properties, Inc.
(540) 443-9228
Milad Hosseinipour
Mehdi Ahmadian