Self correcting arrangement for self compensation of an operatin

Electricity: motive power systems – Positional servo systems – With compensating features

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318560, 31856818, G05D 23275

Patent

active

057739528

ABSTRACT:
A device for providing self compensation of an operating position servo, as when external forces influence movement of a movable object, for example, when turning a wheel chair seat, has a position encoder for outputting position signal sets and for turning of the movable object, servo circuitry with elements for simultaneously signal handling at least two sets of controlling position signals, each set having at least two positioning signals. The servo circuitry includes a coupling device having at least two coupling members which are switchable between a first position which passes a respective one of the at least two velocity dependent signal components of the second set of controlling positioning signals to circuitry producing a drive powering signal and a second position at least temporarily substituting a corresponding one of the at least two velocity dependent signal components of the second set of controlling position signals with a respective one of the at least two position signal components of the first set of controlling positioning signals and through this said second position of the coupling members to produce self compensation by at least temporarily producing a self-corrected value of the at least two velocity dependent signal components of the second set of controlling positioning signals, and causing the self-corrected value to be accepted as a new initial drive powering signal which is maintained as the drive powering signal by the servo when the coupling members are switched back and attain said first switching position.

REFERENCES:
patent: 4194184 (1980-03-01), Hartmann et al.
patent: 5561242 (1996-10-01), Naumann et al.

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