Abstract
Electro-hydrostatic actuator (EHA) has significance in a variety of industrial tasks. For the purpose of elevating the working performance, we put forward a sliding mode control strategy for EHA operation with a damping variable sliding surface. To start with, a novel sliding mode controller and an extended state observer (ESO) are established to perform the proposed control strategy. Furthermore, based on the modeling of the EHA, simulations are carried out to analyze the working properties of the controller. More importantly, experiments are conducted for performance evaluation based on the simulation results. In comparison to the widely used control strategies, the experimental results establish strong evidence of both overshoot suppression and system rapidity.
Highlights
Electro-hydrostatic actuator (EHA) is considered a good solution in a wide range of industrial applications such as spacecraft [1], aircraft [2], robotics [3,4,5,6], vehicles [7], and heavy-duty suspension [8]
For establishing an optimal control strategy for EHA operation, we propose a novel sliding mode control with damping variable sliding surface (DV-SMC) strategy
In order to verify the superiority of the DV-SMC strategy, an EHA system is built and operated on MATLAB/Simulink software published by MathWorks
Summary
Electro-hydrostatic actuator (EHA) is considered a good solution in a wide range of industrial applications such as spacecraft [1], aircraft [2], robotics [3,4,5,6], vehicles [7], and heavy-duty suspension [8]. As reported in [13], “The last level of individualization is the separate assignment of the EHA systems to each actuator. This configuration combines the best features of both hydraulic and electric technologies.”
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