Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1991-08-02
1993-03-16
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
318568240, 318568250, 318490, 388909, 3642674, G05B 2302
Patent
active
051947897
ABSTRACT:
A memory mirror system having a mirror 19, two constant speed motors 16,18 each controlling an axis of mirror movement, position feedback signals 26,28 from each motor, switch inputs 12, a diagnostic push button 40, and an electronic controller 10, is provided with a diagnostic procedure after a self-test push button 40 has been depressed by automatically driving the mirror to the center of movement when manual movement is not requested, thereby allowing system level failures, such as position feedback sensor failures, to be detected quickly by visual inspection of mirror movement as the mirror attemps to return to the origin, without altering existing memory settings or disconnecting the controller 10 from the system. When manual movement is not requested for a predetermined period of time, the diagnostic procedure is prevented from running.
REFERENCES:
patent: 4682088 (1987-07-01), Sullivan
patent: 4929878 (1990-05-01), Hansen
patent: 4940322 (1990-07-01), Hamamoto et al.
DePardo Gerald L.
Ro Bentsu
United Technologies Automotive Inc.
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