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In this paper, the optimal control problem to achieve lunar module soft landing with least fuel consumption is considered. The precise three dimensional dynamics is employed to describe the motion of the lunar module. By introducing two new state equations, a closed loop optimal control law is designed with a parameter matrix K to be determined which is the solution of a riccati like differential...
The pneumatic valve is a position control plant with uncertain parameters and unknown disturbances such as friction and discharge fluctuation. An adaptive nonlinear switching-type robust control strategy is proposed to adjust the valve position in a closed loop manner. The controller consists of a feedforward compensator, a linear state feedback term, a parameter and constant disturbance identifier,...
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