Gimbal disturbance calibration and compenstion

Details Gimbal disturbance calibration and compenstion Gimbal disturbance calibration and compenstion

2005-07-28

2008-10-14

Shriver, J. Allen (Department: 4136)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Aeronautical vehicle

C701S013000, C701S222000

Reexamination Certificate

active

07437222

ABSTRACT:
Various embodiments of the present invention are directed to precision control system for spacecraft gimbaled payloads. Embodiments of the invention provide an innovative technique of calibrating gimbals disturbances to directly canceling gimbal control disturbances. Such a calibration system includes a receiver for receiving telemetry data for pointing a payload, a processor for calculating a disturbance parameter vector for a gimbal disturbance model with the telemetry data and a transmitter for transmitting the disturbance parameter vector to compensate for pointing error when applied in pointing the payload. The gimbal disturbance model comprises a harness stiffness term, a disturbance harmonics term and at least one friction hysteresis term. The telemetry data may be time matched prior to calculating the disturbance parameter vector. Typically, the telemetry data comprises gimbal angle and applied torque data and the disturbance parameter vector is calculated from convergence of an iterative gradient computation with the telemetry data.

REFERENCES:
patent: 3368411 (1968-02-01), Sann
patent: 4082005 (1978-04-01), Erdley
patent: 4596989 (1986-06-01), Smith et al.
patent: 4752884 (1988-06-01), Slafer et al.
patent: 4758957 (1988-07-01), Hubert et al.
patent: 5222023 (1993-06-01), Liu et al.
patent: 5587714 (1996-12-01), Chu et al.
patent: 5751078 (1998-05-01), Loewenthal
patent: 6000661 (1999-12-01), Price et al.
patent: 6175783 (2001-01-01), Strength et al.
patent: 6317660 (2001-11-01), Barker et al.
patent: 6339734 (2002-01-01), Liu et al.
patent: 6463365 (2002-10-01), Anagnost et al.
Dahl, P.R., “A Solid Friction Model” TOR-158 (3107-18)-01, The Aerospace Corporation, May 1968.
Olsson et al., “Friction Models and Friction Compensation” European Journal of Control, Dec. 1988, No. 4 pp. 176-195.
Janiec, M., “Friction Compensation By The Use of Friction Observer”, Master Thesis. Department of Automatic Control, Lund Institute of Technology, Oct. 2004.
Tao G. et al., “Adaptive Control of Nonsmooth Dynamic Systems”, 2001, pp. 211-248.

Affiliated with

Also associated with

Rating

Gimbal disturbance calibration and compenstion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gimbal disturbance calibration and compenstion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gimbal disturbance calibration and compenstion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3988175