Kinematic And Dynamic Analysis Of Space Deployable Boom Systems

This paper is focussed on the deployable boom system (DBS) of Geospace Double Star Exploration Project (DSP) of Chinese Accademy of Sciences. The main content of the paper is as following:1. This paper introduces applicable design results for DBS, such as configurations, stuctural designs and the deploying processes, which are bases for the following analyses.2. This paper gives out the theoretic bases of the deploying kinematic analysis of DBS, and based on the deploying principle of deployable booms, this paper derives an analytical model of deployable booms for DSP. Considering the topology of the boom systems, this paper discussed the DBS's two placements on the satellite and two corresponding movements for the booms. In this paper, such two movements are discussed in depths , and digital simulations have been made to check the probability. The analysis results show that the palcement styles and the rotating angles of such a large scale deployable boom systems are functional importantly. The motions and damps of the boom systems also take importance. If motions become larger, the time for the booms to reach their spreaded states is shorter, and the impact velocities become larger , the impact accelerations become larger too. Stronger elasticity causes a larger impact acceleration, while a lager damp gets a reduced acceleration. Motions and damps can be applied to enhance the reliability of the system.3. This paper setup a finite element model of the DBS for structural analysis of the modal and static conditions of the DBS at launching and spreading states. The modal analysis result shows that the vertical and horizontal frequencies of DPS undeployed are high enough and suffice the dynamic stiffness requested for launching. But the large spread length and light weight effect the low frequency of DBS deployed, so considerations should be taken to the effects of other systems of the satellite. The static analysis result shows that the displacements of the DBS are small under the joint affect of vertical and horizontal loads, and stresses are low, so the stiffness and intensity are good enough.