Numerical Simulation of Solar Array with Shape Memory Alloy in Active Vibration Control
The objective of this study is to develop a general design scheme for shape memory alloys (SMA) intelligent structure. The scheme involves dynamic modeling and closed-loop simulation in a finite element environment. First, the structure of multi-body finite element model simulating the real solar array is established. SMA wire is appended on the model. The physical value of the strain, displacement, velocity and acceleration at the sensors locations separately is acted as the feedback signal. The value is multiplied by the control gain to calculate the voltage inputted to SMA wire. The finite element model is then modified to accept control laws and perform closed-loop simulations. Finally numerical examples have demonstrated the efficiency of the vibration control.
Y. L. Zhang et al., "Numerical Simulation of Solar Array with Shape Memory Alloy in Active Vibration Control", Applied Mechanics and Materials, Vols. 29-32, pp. 589-595, 2010