Linear dc motor vibration controller

Details Linear dc motor vibration controller Linear dc motor vibration controller

1987-01-06

1990-01-30

Salce, Patrick R.

Electricity: motive power systems

Linear-movement motors

244164, 244170, 310 12, B64G 138, G05B 1158

Patent

active

048975826

ABSTRACT:
A linear force actuator system for stabilizing a support structure employs a linear dc motor whose primary winding is driven by a pulse width modulation control signal representative of a force input, through which the secondary member of the motor which acts as an inertial mass, is to be controllably translated. For improved control accuracy, the actuator system of the invention employs a pair of feedback loops, one of which monitors the current in the motor's primary winding to maintain a constant force output to the secondary member and a secondary of which monitors long term deviations from the center of the secondary member and corrects for centering offsets. An opto-electronic position sensing arrangement monitors the movement of the secondary member whereby precise control of commutation of the coils of the primary winding and a smooth translation of the secondary member are obtained.

REFERENCES:
patent: 3839664 (1974-10-01), Dirks et al.
patent: 4361776 (1982-11-01), Hayashi et al.
patent: 4424948 (1984-01-01), Muhlfelder et al.
patent: 4463300 (1984-07-01), Mayne et al.
patent: 4525659 (1985-06-01), Imahashi et al.

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