Abstract
Finite-time controllers robust to inertia matrix uncertainty for satellite attitude stabilization control and attitude tracking control are developed in this chapter. A three-stage finite sliding mode is constructed to improve system convergence rate. The singularity issue is solved by using the property of Euler axis when it is paralleled to angular velocity. Based on this finite-time-sliding mode, finite-time controller is developed to ensure the system state could reach the sliding mode in finite time. System inertia matrix uncertainty and disturbance torque is considered in this chapter. The control torque constraint is also considered to ensure the norm of control torque does not exceed system upper bound. Finite-time stability of the controller is proved and the controller performance is demonstrated by simulation results.
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