Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission mechanisms  

作　　者：Shufei QIAO Long QUAN Yunxiao HAO Lei GE Lianpeng XIA 

机构地区：[1]Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Frontiers of Mechanical Engineering》2023年第2期189-204,共16页机械工程前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51875385 and 51805349).

摘　　要：Servo-hydraulic actuators(SHAs)are widely used in mechanical equipment to drive heavy-duty mechanisms.However,their energy efficiency is low,and their motion characteristics are inevitably affected by uncertain nonlinearities.Electromechanical actuators(EMAs)possess superior energy efficiency and motion characteristics.However,they cannot easily drive heavy-duty mechanisms because of weak bearing capacity.This study proposes and designs a novel electromechanical-hydraulic hybrid actuator(EMHA)that integrates the advantages of EMA and SHA.EMHA mainly features two transmission mechanisms.The piston of the hydraulic transmission mechanism and the ball screw pair of the electromechanical transmission mechanism are mechanically fixed together through screw bolts,realizing the integration of two types of transmission mechanisms.The control scheme of the electromechanical transmission mechanism is used for motion control,and the hydraulic transmission mechanism is used for power assistance.Then,the mathematical model,structure,and parameter design of the new EMHA are studied.Finally,the EMHA prototype and test platform are manufactured.The test results prove that the EMHA has good working characteristics and high energy efficiency.Compared with the valve-controlled hydraulic cylinder system,EMHA exhibits a velocity tracking error and energy consumption reduced by 49.7% and 54%,respectively,under the same working conditions.

关 键 词：electromechanical-hydraulic hybrid actuator(EMHA) INTEGRATION transmission mechanisms power assistance energy efficiency working characteristics 

分 类 号：TH11[机械工程—机械设计及理论]