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    • 4. 发明申请
    • MOMENTUM MANAGEMENT SYSTEM FOR REACTION WHEEL BY USING NULL SPACE VECTOR AND METHOD
    • 通过使用空间空间向量和方法来反应车轮的动态管理系统
    • US20090159753A1
    • 2009-06-25
    • US12341393
    • 2008-12-22
    • Jo Ryeong YimShi Hwan OhSeon Ho LeeHyun Ho SeoYong Bok KimHye Jin LeeHong Taek ChoiKi Lyuk Yong
    • Jo Ryeong YimShi Hwan OhSeon Ho LeeHyun Ho SeoYong Bok KimHye Jin LeeHong Taek ChoiKi Lyuk Yong
    • B64G1/28
    • B64G1/283B64G2001/245
    • A reaction wheel momentum management method using a null space vector is provided. In accordance with this method, when any one of at least four reaction wheels used for triaxial control is made unavailable or degraded, a degraded wheel is used as long as possible for improving the mobility of the behavior of a satellite. The method provides momentum management for an N-number of reaction wheels W1, W2, . . . WN used for triaxial control of a satellite B by using a null space vector, and includes the steps of: (S10) measuring the current speed and momentum of the wheels in real time and comparing the measured current speed and momentum with a preset maximum speed and momentum; (S20) calculating a zero torque Tn based on a difference between the current speed and momentum and the maximum speed Wi,max and momentum Hi,max by the step (S10); (S30) adding the zero torque acquired by the step (S20) to a wheel torque Ta required for controlling and stabilizing the attitude of the satellite; and (S40) making the wheels reach an optimum bias momentum state by using the input torque of the wheels acquired by the step (S30).
    • 提供了使用零空间矢量的反作用力矩管理方法。 根据该方法,当用于三轴控制的至少四个反作用轮中的任何一个使得不可用或劣化时,尽可能长时间地使用降级的轮来改善卫星的行为的移动性。 该方法为N个反作用轮W1,W2提供动量管理。 。 。 WN用于通过使用零空间矢量对卫星B进行三轴控制,并且包括以下步骤:(S10)实时测量车轮的当前速度和动量,并将测量的当前速度和动量与预设最大速度进行比较 和势头; (S20)通过步骤(S10),基于当前速度和动量与最大速度Wi,max和动量Hi,max之间的差计算零转矩Tn; (S30)将由步骤(S20)获取的零转矩加到控制和稳定卫星姿态所需的车轮转矩Ta上; (S40)通过使用由步骤(S30)获取的车轮的输入转矩使车轮达到最佳偏压动量状态。