A Novel Three-Position Three-Way Integrate High Speed On/Off Valve Pair With Opposite Reverse-Drive Three-Level Strategy
Shuai Wu, Yi Wang, Renjie Li, Hongtao Jin, Chenglin Hou, Zongxia Jiao
Abstract
Digital hydraulic systems (DHSs) are increasingly adopted in aerospace applications due to their high reliability and robustness. However, the dynamic performance of the high-speed <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on/off</small> valve (HSV) directly affects system response and control accuracy, while aerospace applications simultaneously impose stringent demands on miniaturization. Existing HSV struggle to resolve the tradeoff between high performance and a compact form factor. To address this challenge, this study proposes a novel integrated HSV pair (IHSVP) combined with an opposite reverse-drive three-level strategy (ORTS). Structurally, the IHSVP utilizes a single mover to cooperatively control two ports, achieving a three-position three-way configuration. This innovative design enhances integration and reduces weight while preserving servofunctions. Strategically, the ORTS facilitates active, high-speed closure by energizing an opposing coil. The proposed design is validated through electromagnetic finite element and multiphysics simulations. Experimental results demonstrate that the proposed IHSVP with ORTS, when compared to conventional designs, shortens the total closing time by 59%, expands the linear zone of average flow characteristics by 29%, and completely eliminates pressure overshoot in the step response. These results confirm that the IHSVP with ORTS resolves the conflict between dynamic performance and compactness.