Procedure for filtering the speed feedback signal

Details Procedure for filtering the speed feedback signal Procedure for filtering the speed feedback signal

1992-06-03

1994-05-17

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

318799, 318807, 388801, H02P 5165

Patent

active

053135490

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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patent: 4990840 (1989-02-01), Migda
patent: 5008543 (1991-04-01), Bertrand
patent: 5124626 (1992-06-01), Thoen
Ovaska, S. J. "Multistage digital prefiltering of noise tachometer signals", Sep. 1988, pp. 466-468.
Neuvo Y. and Heinonen P., "FIR-Median Hybrid Filters with Predictive FIR Substructures", Jun. 1988, pp. 892-899.
Oppenheim A. V., Schafer R. W., "Discrete-Time Signal Processing", 1989, pp. 290-317.
Putas I., Venetsampoulus A. N., "Nonlinear Digital Filters", 1990, pp. 63-65.

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