A COMPENSATION OBSERVER METHOD FOR THE IMPROVEMENT OF PERFORMANCE OF LOW- SPEED REACTION WHEEL

WANG Bingquan; LI Ying; YANG Di

doi:10.11728/cjss1999.04.362

Volume 19 Issue 4

Dec. 1999

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Article Navigation > Chinese Journal of Space Science > 1999 > 19(4): 362-367

WANG Bingquan, LI Ying, YANG Di. A COMPENSATION OBSERVER METHOD FOR THE IMPROVEMENT OF PERFORMANCE OF LOW- SPEED REACTION WHEEL[J]. Chinese Journal of Space Science, 1999, 19(4): 362-367. doi: 10.11728/cjss1999.04.362

Citation:

WANG Bingquan, LI Ying, YANG Di. A COMPENSATION OBSERVER METHOD FOR THE IMPROVEMENT OF PERFORMANCE OF LOW- SPEED REACTION WHEEL[J]. Chinese Journal of Space Science, 1999, 19(4): 362-367. doi: 10.11728/cjss1999.04.362

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A COMPENSATION OBSERVER METHOD FOR THE IMPROVEMENT OF PERFORMANCE OF LOW- SPEED REACTION WHEEL

doi: 10.11728/cjss1999.04.362 cstr: 32142.14.cjss1999.04.362

Department of Aerospace and mechanics, Harbin institute of Technology, 150001

Received Date: 1999-01-08
Rev Recd Date: 1999-07-15
Publish Date: 1999-12-24

Abstract

Abstract

The dynamic equation of the low-speed reaction wheel used to stabilize a satellite's three-axis attitude is put forward on the base of Dahl friction model, andaccording to this the phenomenon that the reaction wheel's speed crossing zero disturbs satellites attitude is analyzed. Anonlinear observer is used to estimate thefriction torque in order to compensate it. Simulation results prove that this methodcan compensate the reaction wheel low-speed friction, and improve attitude pointingaccuracy and stability.
- Reaction wheel low-speed friction,
- Three-axis attitude stability control,
- Nonlinear observer