A Direct Lyapunov-Backstepping Approach for Stabilizing Gantry Systems with Flexible Cable
Keywords:flexible systems, overhead crane, field oriented control, Lyapunov direct method
Trolley positioning and payload swinging control problem of a flexible cable gantry crane system are addressed in this paper. The system’s equations of motion that couple the crane’s cable and actuators dynamics are derived via extended Hamilton’s principle. The control signal is designed based on the Lyapunov direct method to derive control force and backstepping technique is employed to determine input signal for the actuator. The stability of the closed loop system is proven analytically. Numerical simulations are included to demonstrate the effectiveness and robustness of the closed-loop system.
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