Cross-Coupled Sliding Mode Synchronous Control for a Double Lifting Point Hydraulic Hoist

Abstract

This paper proposes a sliding mode synchronous control approach to enhance the position synchronization performance and anti-interference capability of a double lifting point hydraulic hoist. Building upon the cross-coupling synchronous control method, a coupling sliding mode surface is formulated, incorporating the single-cylinder following error and double-cylinder synchronization error. Additionally, a sliding mode synchronous controller is devised to ensure the convergence of both the single-cylinder following and synchronization error. The hyperbolic tangent function is introduced to reduce the single-cylinder following error and the buffeting of the double-cylinder synchronization error curve under sliding mode synchronous control. The simulation results show that the synchronization accuracy of the sliding mode cross-coupling synchronization control in the initial stage of the system is 53.1% higher than that of the Proportional-Derivative (PD) cross-coupling synchronization, and the synchronization accuracy in the steady state of the system is improved by 90%. The designed synchronous controller has better performance under external disturbances.

Research on Speed Cooperative Control Strategy for Rudderless Dual-PMSM Propulsion Ships

“…In Equation (9), ω represents the motor speed, and in Equation (10), J is the moment of inertia for the corresponding motor.…”

“…[9] combined neural PID technology with the CCC strategy, which addressed the oscillation issues associated with traditional PI feedback gain. Various improved sliding mode control strategies have also been explored, such as in [10], where sliding mode control technology was combined with cross-coupled control. By constructing a sliding mode controller, compensation was added to the control loop, and the system response speed was significantly increased.…”