Design, Analysis, and Verification of an Electro- Hydrostatic Actuator for Distributed Actuation System
Yang Li1, Zongxia Jiao1,2, Zimeng Wang1
1National Key laboratory on Aircraft Fight Control, School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China.
Sensors (Basel, Switzerland)
|January 26, 2020
Summary
This study introduces a simplified, low-cost electro-hydrostatic actuator (EHA) for distributed actuation systems. It utilizes a novel linear pump with a collaborative rectification mechanism, eliminating the need for valve control and enhancing efficiency.
Area of Science:
- Engineering
- Mechanical Engineering
- Robotics
Background:
- Distributed actuation systems often require complex and costly terminal solutions.
- Existing actuators may involve intricate valve controls, reducing efficiency and increasing cost.
Purpose of the Study:
- To propose a simplified and low-cost electro-hydrostatic actuator (EHA) for distributed actuation systems.
- To develop an EHA based on a linear drive principle, eliminating the need for traditional valve control.
Main Methods:
- Directly driving a linear pump with a collaborative rectification mechanism.
- Employing two linear oscillating motors to drive the pump units.
- Controlling the actuator via modulation of oscillating amplitude, frequency, and phase difference.
Main Results:
- The proposed EHA structure eliminates the need for valve control for pump rectification.
- High efficiency is achieved through direct pump drive.
- Experimental validation confirms the actuator's structure and control method.
Conclusions:
- The developed EHA offers a simplified and cost-effective solution for distributed actuation.
- The novel collaborative rectification mechanism enhances operational efficiency.
- The proposed control strategy is effective and experimentally validated.
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