Attitude Dynamics Modeling And Control For Spinning Solar Sail

Spinning solar sail is different from the traditional type of solar sail, which does not require rigid structure to support its membrane. It can deploy the membrane by the centrifugal force, and can be folded into a smaller volume. So spinning solar sail has a great significance in the studying of solar sail research. However, we need to solve the problem of the deployment control, the attitude angle control and the membrane vibration control of spinning solar sail before it can be successfully used. This paper is mainly focused on the three aspects above on the basis of studying of the spinning solar sail.As to the deployment control of spinning solar sail, we adopt two-step deployment method of spinning solar sail. And we do research on the first step of the deployment, which has decisive effect on the deployment process. After the analyzing of the folding technique for the membrane, the model of deploying the spinning solar sail used two-step deployment method is studied. Then, the existing control algorithm of MK controller is improved and realized the first step of deploying the spinning solar sail.As to the attitude angle control of spinning solar sail, we use the reflectivity control method and the reaction control method which is a traditionaj controlling method to control the attitude angle of spinning solar sail. Attitude dynamics model is established under two control methods. And then we design particle swarm optimization and linear quadratic optimization controller for the two models above. At last, we achieve the asymptotically tracking of the optimal target angle.As to the membrane vibration control of spinning solar sail, we study the vibration mechanism of the membrane first, and establish the vibration dynamics model for the spinning solar sail. Then, when the state of the model can be completely measured, the linear quadratic controller is designed to suppress the vibration of the membrane. In consideration of the problem of actuator saturation, the input constraints anti-saturation controller is designed to suppress the vibration of the membrane. And when the state of the model cannot be completely measured, output feedback controller is designed. Finally, the simulations are carried out and the results show the effectiveness of the method.