Failure detection and correction system for redundant control el

Details Failure detection and correction system for redundant control el Failure detection and correction system for redundant control el

1978-04-17

1981-04-07

Truhe, J. V.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

244165, 244194, 318648, 318649, G05B 2302

Patent

active

042609429

ABSTRACT:
Apparatus and a related method for detecting failures of control elements, such as skewed-axis reaction wheels with closed-loop speed control, used in satellite attitude control systems, and for compensating for such failures and thereby maintaining continuity of operation. The apparatus includes a wheel loop model for simulating operation of each of the reaction wheels and speed control loops in the satellite, and for deriving an estimated wheel speed from a command speed for each wheel. By comparing the estimated speed of each wheel with the corresponding actual or observed speed, the apparatus determines whether a failure was occurred in the wheel, or in its control loop. Upon detection of such a failure, the apparatus disconnects driving power from the failed wheel, modifies the corresponding wheel loop model to reflect disconnection of power, and reconfigures a distribution matrix in such a manner that a set of desired momentum commands with respect to the vehicle axes is properly redistributed among the remaining reaction wheels. Compensation is also made for the momentum contributions of failed wheels that continue to spin after being powered down.

REFERENCES:
patent: 3422327 (1969-01-01), McBrayer et al.
patent: 3440504 (1969-04-01), Boskovich et al.
patent: 3999729 (1976-12-01), Muhlfelder et al.

Affiliated with

Also associated with

Rating

Failure detection and correction system for redundant control el does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Failure detection and correction system for redundant control el, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Failure detection and correction system for redundant control el will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-291273