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�������պ����ѧѧ�� 2008, Vol. 34 Issue (02) :229-233    DOI:
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1. �Ͼ����պ����ѧ ���¼����о�Ժ, �Ͼ� 210016;
2. �Ͼ����պ����ѧ �Զ���ѧԺ, �Ͼ� 210016
Underactuated control of micro-satellite using thrusters based on ��(w,z)�� parametrization
Liu Haiying1, Wang Huinan2, Chen Zhiming2*
1. Academy of Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Chin;
2. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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Abstract�� Aimed at the attitude stabilization of micro-satellite under actuator failure, a control scheme based on the (w,z) parametrization was proposed. The (w,z) parametrization is a new attitude describing method, which describes the attitude of satellite using two perpendicular rotations thus complements the Euler angles and quaternion. Using (w,z) parametrization method the kinematics and dynamics model were established, and three controllers named spin-axis stabilization, angular velocities stabilization and attitude stabilization were designed, which applied on three aspect of non-symmetry satellite under actuator failure. Numerical examples of underactuated control by micro-thrusters which is based on pulse width modulation(PWM) technology demonstrated the effectiveness of the derived method.
Keywords�� micro-satellite   underactuated control   attitude control   thrusters   pulse width modulation(PWM)     
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About author: ����ӱ(1980-),��,������ʦ��,��ʿ,nuaalhy@sina.com.
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����ӱ,������,��־��.���� (w,z) ��������΢С��������Ƿ��������[J]  �������պ����ѧѧ��, 2008,V34(02): 229-233
Liu Haiying, Wang Huinan, Chen Zhiming.Underactuated control of micro-satellite using thrusters based on ��(w,z)�� parametrization[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(02): 229-233
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