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首页> 外文期刊>Journal of Guidance, Control, and Dynamics >Control Moment Gyro Singularity-Avoidance Steering Control Based on Singular-Surface Cost Function
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Control Moment Gyro Singularity-Avoidance Steering Control Based on Singular-Surface Cost Function

机译:基于奇异面代价函数的控制力矩陀螺回避控制

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Although controlmoment gyros have the advantage of producing large output torques, their singularities hamperntheir use in spacecraft. Many studies have investigated steering laws to avoid singularities. Some of these steeringnlaws are capable only of local avoidance. On the other hand, global steering laws require complex calculations thatnhave to be performed offline. In this study, to establish a semiglobal singularity-avoidance method that does notnrequire a large amount of offline calculation, a geometrical singularity-avoidance steering law is proposed bynintroducing a cost function. This function is termed the surface cost, and it calculates the relation between singularnsurfaces and the given command torque.The steering lawkeeps the cost function lowby adding perturbation torquesnto the angular momentum trajectories of control moment gyros. The effectiveness of the proposed steering law isnvalidated numerically and experimentally.
机译:尽管控制力矩陀螺仪具有产生大输出转矩的优点,但它们的奇异性妨碍了它们在航天器中的使用。许多研究已经研究了转向规律以避免奇异性。这些指导原则中的一些只能局部避免。另一方面,全球转向法则要求进行复杂的计算。在本研究中,为了建立不需要大量精细计算的半全局避免奇异性方法,通过引入成本函数,提出了一种避免几何奇异性的转向律。该函数称为表面成本,它计算奇异曲面与给定命令转矩之间的关系。转向法通过将微扰转矩n添加到控制力矩陀螺仪的角动量轨迹中,从而使成本函数较低。所提出的转向规律的有效性在数值和实验上均未得到验证。

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