| 改善反作用轮低速性能的补偿观测器方法 |
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| 引用本文： | 王炳全,李瀛.改善反作用轮低速性能的补偿观测器方法[J].空间科学学报,1999,19(4):362-367. |
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| 作者姓名： | 王炳全 李瀛 |
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| 作者单位： | 哈尔滨工业大学航天工程与力学系!１５０００１ |
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| 摘 要： | 基于Ｄａｈｌ摩擦模型，给出了用于卫星姿态三轴稳定控制的反作用轮低速动力学方程，就反作用轮转速过零对卫星姿态产生的扰动现象进行了分析，提出了一种利用非线性观测器估计摩擦力矩，并予以补偿的补偿观测器方法。仿真结果表明，该方法改善了反作用轮低速性能，提高了卫星姿态控制的指向精度和稳定度。
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| 关 键 词： | 反作用轮 低速摩擦 姿态稳定控制 观测器 |
A COMPENSATION OBSERVER METHOD FOR THE IMPROVEMENT OF PERFORMANCE OF LOW- SPEED REACTION WHEEL |
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| 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. |
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| Authors: | WANG Bingquan LI Ying YANG Di |
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| 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. A nonlinear 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. |
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| Keywords: | Reaction wheel low-speed friction Three-axis attitude stability control Nonlinear observer |
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