Procedure for filtering the speed feedback signal
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United States of America Patent
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May 17, 1994
Grant Date -
N/A
app pub date -
Jun 3, 1992
filing date -
Jun 5, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A procedure is disclosed for filtering the speed feedback signal in an elevator motor drive which is provided with a speed controller and in which the speed of rotation of the motor is measured. The procedure of the invention involves sampling the speed feedback signal, producing a prediction of the next sample by a predicting procedure that filters the noise in the speed feedback signal, and forming an estimate of the latest sample by delaying the prediction by a time corresponding to one sample.
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