National Key laboratory on Aircraft Fight Control, School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China.
Ningbo Institute of Technology, Beihang University, Ningbo 315800, China.
Sensors (Basel). 2020 Jan 23;20(3):634. doi: 10.3390/s20030634.
In order to provide a simplified and low-cost solution of the terminal for a distributed actuation system, this paper proposes an electro-hydrostatic actuator (EHA) based on the linear drive principle. The proposed actuator is directly driven by a linear pump with a collaborative rectification mechanism, whose performance relies on the collaboration of the internal two units. A pair of linear oscillating motors are employed to drive the two pump units respectively. The control of the actuator is based on the modulation of the oscillating amplitude, frequency, and phase difference of the two motors. The advantage of this actuator is that no more valve control is needed to rectify the linear pump besides the high efficiency of the direct pump drive. In this paper, both schematic and detailed structure of the actuator is presented. The kinematic and dynamic characteristics are analyzed and modeled, based on which the control method is proposed. The experiments verify the validity of the actuator structure and control.
为了为分布式致动系统的终端提供简化和低成本的解决方案，本文提出了一种基于线性驱动原理的电静液执行器 (EHA)。所提出的执行器由带有协同整流机构的线性泵直接驱动，其性能依赖于内部两个单元的协同作用。一对线性振荡马达分别用于驱动两个泵单元。执行器的控制基于两个马达的振荡幅度、频率和相位差的调制。该执行器的优点是除了直接泵驱动的高效率之外，不需要更多的阀控制来整流线性泵。本文介绍了执行器的原理图和详细结构。分析和建模了运动学和动力学特性，在此基础上提出了控制方法。实验验证了执行器结构和控制的有效性。
