Nonlinear Dynamics Analysis of Generalized Deployment Units

doi:10.3901/JME.2020.11.058

Abstract

Abstract: A generalized deployment unit containing flexible hinges, torsional springs and other non-traditional components is designed. With considering the clearance, friction, collision damping and flexible hinge nonlinearity, a nonlinear dynamic model of generalized deployment unit including nonlinear coupling of clearance and flexible member is established. Through the analysis of the angular displacement, angular velocity, collision frequency and collision force of the deployment process, the influence of the hinge clearance and the stiffness of torsional spring on the stability of the deployment process is obtained. The results show that the clearance has a great influence on the motion stability, which makes the motion of the mechanism appear nonlinear. The nonlinear is mainly reflected in the angular velocity of the driven rod and the amplitude of the collision force. The matching of the stiffness of the torsion spring with its initial moment is an important factor for the smooth development of the generalized deployment unit. The nonlinear phenomenon is suppressed effectively with designing the he stiffness of torsional spring reasonably.

Key words: generalized deployment unit, hinge clearance, nonlinear, flexible hinge, dynamics

CLC Number:

TH113

DONG Hangjia, LI Tuanjie, WANG Zuowei. Nonlinear Dynamics Analysis of Generalized Deployment Units[J]. Journal of Mechanical Engineering, 2020, 56(11): 58-64.

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