A kind of mechanic modeling method for spacecraft cable considering spatial constraints

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (16) : 8-13.

YOU Bin-di，ZHENG Tian-jiao，CHEN Jun，YANG Bin-jiu

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Abstract

In order to overcome drawbacks of the discrete model and adapt to the complex spatial constraints in spacecraft, a mechanic modeling method of spacecraft cable considering spatial constraints is proposed based on thin elastic rod. And continuous mechanic model of the cable is established. The spatial position and attitude of the cable are described by inertial coordinate system and local coordinate system. And then, static equilibrium equation of the cable considering deadweight and spatial constraints is deduced. Typical conditions of space constraints in the routing process are analyzed. Furthermore, mechanic models of the cable with none constraint, endpoint constraint, contact surface constraint and clamp constraint are established, and they are solved and analyzed using the numerical method. Regularities of forces of the cable with none constraint, contact surface constraint and clamp constraint are obtained. The results show that mechanic properties of the cable can be improved effectively by combining the clamp constraint and contact surface constraint reasonably in the routing process. Universality and feasibility of the model are verified. Therefore, conclusions have important academic value and engineering significance to the mechanic modeling of the flexible cable and routing process.

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flexible cable / mechanic modeling / spatial constraints / simulation analysis

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YOU Bin-di，ZHENG Tian-jiao，CHEN Jun，YANG Bin-jiu. A kind of mechanic modeling method for spacecraft cable considering spatial constraints[J]. Journal of Vibration and Shock, 2015, 34(16): 8-13

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