Fixed-time bounded H infinity tracking control of a single-joint manipulator system with input saturation

Based on Lyapunov finite-time stability theory and backstepping strategy, we put forward a novel fixed-time bounded H infinity tracking control scheme for a single-joint manipulator system with input saturation. The main control objective is to maintain that the system output variable tracks the desired signal at fixed time. The advantages of this paper are the settling time of the tracking error converging to the origin is independent of the initial conditions, and its convergence speed is more faster. Meanwhile, bounded H infinity control is adopted to suppress the influence of external disturbances on the controlled system. At the same time, the problem of input saturation control is considered, which effectively reduces the input energy consumption. Theoretical analysis shows that the tracking error of the closed-loop system converges to a small neighbourhood of the origin within a fixed time. In the end, a simulation example is presented to demonstrate the effectiveness of the proposed scheme.