Linear actuator drive control apparatus

Details Linear actuator drive control apparatus Linear actuator drive control apparatus

1990-02-22

1991-10-08

Ip, Paul

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318135, 318640, 310309, G05B 1100

Patent

active

050557602

ABSTRACT:
The drive control apparatus for a linear actuator according to the present invention uses fine actuators, such as an electrostrictive element, so that it is possible to manufacture a linear actuator drive control apparatus obtaining big driving force in spite of a size considerably smaller than the conventional magnetic motor and linear motors utilized electromagnetic force. In addition, since the fine actuator and the driving base repeats their fixings and seperatings, it is possible to make the driven stroke range of the driving base wide. Since the fixing operation and the separating operation are carried out when the speeds of the fine actuator and of the driving base are almost the same, generation of the shock due to sudden speed change of the fine actuator and the driving base at the same of their fixing and separating is prevented, and it is possible to obtain smooth driving of the driving base. Control of the speeds of the fine actuator enables to finely and precisely control the speed of the driving base.

REFERENCES:
patent: 4087729 (1978-05-01), Yamazaki et al.
patent: 4359289 (1982-11-01), Barrus et al.
patent: 4456934 (1984-06-01), Wedman et al.
patent: 4754185 (1988-06-01), Gabriel et al.
patent: 4808901 (1989-02-01), Sakamoto
patent: 4809001 (1985-04-01), Wakabayashi et al.

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