Parallel redundant actuator systems

Details Parallel redundant actuator systems Parallel redundant actuator systems

1987-06-12

1988-11-29

Shoop, Jr., William M.

Electricity: motive power systems

Torquing motors

318254, 318138, 318671, G05B 1700

Patent

active

047884835

ABSTRACT:
A parallel redundant actuator system of the kind wherein the signal in each of a plurality of lanes (31A, 31B, 31C) comprises the difference between a demand signal and a signal indicating the position of an output member of the system and the output member (3) takes up a position determined by the output of a summing arrangement (21) for the outputs of the lanes and wherein between the input of each lane and the output of the summing arrangement each lane has a non-linear input/output characteristic whose slope over a range of values of input in which changes of input due to failure of another lane occur is greater than if the characteristic were linear over the range of values of input over which the lane is capable of operation. The arrangement is intended to reduce the change in position of the output member which occurs on failure of a lane.

REFERENCES:
patent: 4159444 (1979-06-01), Bartlett et al.
patent: 4642539 (1987-02-01), Hinds

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