Abstract: An active energy storage component is a new type of gas-electric hybrid energy storage component proposed to address the shortcomings of existing hydraulic accumulators. However,there is an energy coupling problem between hydraulic energy,compression gas energy,and electrical energy,which leads to poor anti-interference ability during operation and reduces the energy-saving efficiency of the working hydraulic system.In order to solve the problem of poor anti-interference ability,a system architecture that uses active energy storage components to achieve arm potential energy regeneration was proposed based on the working characteristics of the hydraulic circuit of the hydraulic excavator arm.A self-disturbance control strategy and its parameter optimization method were designed to solve problems such as interference and parameter uncertainty by designing an expansion state observer. To verify the feasibility of the control strategy,the structure of the active energy storage component was first introduced,followed by the design of a self-disturbance controller based on the active energy storage component as the control object. A simulation model of the arm potential energy regeneration system based on the active energy storage component was established and experimentally verified. The research results show that the recovery efficiencies of the accumulator mode,normal control mode,and self-disturbance control mode are 42.81 %,56.76 %,and 58.60 %,respectively;the reuse efficiencies are 96.01 %,97.06 %,and 95.81 %,respectively;and the regeneration efficiencies are 41.1 %,55.1 %,and 56.1 %,respectively. The simulation and experimental results also show that the self-disturbance control strategy proposed for the active energy storage component effectively improves the control performance and enhances the system pressure stability.

Key words: active energy storage component, hydraulic accumulator, active disturbances rejection controller, arm potential energy regeneration, hydraulic energy-saving