A load torque compensation scheme under the speed measurement delay
Kichul Hong; Kwanghee Nam
Industrial Electronics, IEEE Transactions on
Volume 45, Issue 2, Apr 1998 Page(s):283 - 290
Digital Object Identifier   10.1109/41.681227
Summary:The average speed detection method involves a measurement delay, which can cause a serious instability problem to the unknown load torque observer. The instability can be cured by inserting an artificial delay into the torque-filtering path of the observer. Also, by utilizing the concept of the phase lead compensator, we propose a method of designing an arbitrary high-order low-pass filter (Q filter). Through the results of simulation and experiments, we show that our proposed method yields more robust and improved results than the conventional load torque observer

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