Deployment analysis of deployable antennas considering cable net and truss flexibility

Abstract Dynamic analysis of antennas during the deployment is very important. Several successful methods have been demonstrated. However, few studies have been conducted on the deployment analysis of antennas with cable net and flexible truss. This paper presents an analysis method of the deployment of antennas consisting of cable net and flexible truss. First, a beam element is used to model the flexible truss and a cable element with a transition function is used to model the cable net from slack to tension state. Then, the deployment of the antenna is planned and the corresponding variation of the length of the driving cable is obtained. Due to the fact that antennas deploy very slowly in space, the mechanism analysis problem for the antenna during deployment is discretized to several quasi-static configuration analysis problems. By using the principle of minimum potential energy, the equilibrium state of the quasi-static configuration at an instant of the deployment is computed. Numerical simulation of 2 m aperture mesh reflector antenna was performed. The numerical results are compared with previous works, and the validity of the method is demonstrated.

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