Dynamics and reliability analysis of the deployment process of spring folding wing

Abstract

A “X” type spring folding wing is taken as the research object in this paper, and schematic diagrams of unfolding and locking process are drawn according to its structure and working principle. The theoretical model of kinematics and dynamics which considering the gravity moment is established by simplifying the geometric model of deployment mechanism of the folding wing, so the curve of deployment angle and angular velocity of the outer wing during the deployment process can be obtained. The pulley diameter, preload force and stiffness of the spring-actuated are taken as random variables, and the deployment time and angular velocity are regarded as evaluation indicators. The Monte Carlo method is used to analyse the reliability of deployment process of the folding wing, and the reliability of the deployment process is obtained. The results show that the reliability of the deployment process of the spring folding wing is high.

Reliability Evaluation for Cable-Spring Folding Wing Considering Synchronization of Deployable Mechanism

“…The structure of the research object in the present research is same as that in [2]. Each cable-spring folding wing is mainly composed of a group of lateral deployable mechanism and two groups of longitudinal locking mechanisms.…”

“…The folding wing resting in the launch tube is initially constrained by the inner wall at a certain angle. Then, the unconstrained folding wing deploys rapidly under the action of the deployable mechanism during ejection of the missile [2]. Subsequently, the locking pins are engaged to lock up the folding wing in a timely and accurate manner.…”

“…On the basis of rigid-flexible coupling dynamics analysis of the deployable mechanism, a novel reliability evaluation method for the cable-spring folding wing is proposed, which has applicable values for solving the key problems, such as its being time-consuming and incomplete evaluation. The literature [2] has discussed the working principle of the folding wing, analyzed the dynamic characteristics while neglecting the friction torque, and calculated the reliability considering only three factors. Based on the previous related research and focusing on the phenomenon of asynchrony between the upper and lower wings, this paper provides a novel idea for comprehensively evaluating the reliability of cable-spring folding wing.…”

Mobility Analysis of Space Deployable Truss Considering Joint Clearance and Friction

“…Zhao et al [5] present for constant and non-constant random variable distribution parameter, then proposed improved active learning Kriging method to calculate the reliability of deployment performance. Gao et al [6] select pulley diameter, preload force and stiffness of the spring-actuated as random variables, deployment time and angular velocity as evaluation indicators, then use Monte Carlo method to analyze the reliability of deployment of folding wing. Hu et al [7] base on the condition of truss element deploying, establish the mobility model of deploying motion, then analyze and solve deployment mobility by First Order Second Moment method.…”