SBIR Phase II: Closed Loop PC-Controlled Servo-Valve

这个小企业创新研究二期项目将开发一种数字闭环伺服阀执行器，该执行器使用液压马达和泵组件、数字阀、歧管和液压副板。在二期工程中，将开发一种控制算法来精确控制“负载”的位置、速度和加速度。第一阶段通过开发一种采用高速数字流体开关的新型数字开环伺服阀，证明了高性能、全数字化流体控制方法是可能的。最初的原型单元由一个阀门元件、一个电子阀门驱动器和控制元件组成，并在大量流体的情况下进行了快速开关测试。测试确定了阀门的方向控制、流体泄漏、能耗、开关次数、噪声抗扰度、失效模式、脉冲监测以及可靠性和响应特性。结果表明，该系统可用于各种需要稳定、响应灵敏、可重复和/或远程控制流体动力的应用。在第二阶段开发的独特伺服阀将广泛应用于建筑，机床，航空航天，飞机部件系统等行业，以及任何其他流体动力改善控制和可重复性是性能因素的领域。* * * p: \ sbir \ yhashimi \ 9521451 b.doc

*** Woodworth 9521451 This Small Business Innovation Research Phase II project will develop a Digital Closed-Loop Servo-valve actuator that uses a hydraulic motor and pump assembly, a digital valve, a manifold, and a hydraulic sub plate. During the Phase II project, a control algorithm will be developed to precisely control the position, velocity and acceleration of "loads". Phase I demonstrated that a high performance, all digital approach to fluid control was possible by developing an innovative new Digital Open-Loop Servo-valve using a high speed digital fluid switch. Initial prototype units consisting of a valve element coupled to an electronic valve driver and control element were constructed and tested for fast switching speeds with large quantities of fluid. Testing was conducted to determine the valves' directional control, fluid leakage, energy consumption, switching times, noise immunity, failure modes, pulse monitoring, and reliability and response characteristics. Results demonstrated system use in a wide variety of applications requiring stable, responsive, repeatable and/or remote control of fluid power. The unique servo-valve developed during Phase II will have wide application in such industries as construction, machine tooling, aerospace, aircraft component systems, and any other areas where fluid power for improved control and repeatability is a performance factor. *** p:\sbir\yhashimi\9521451b.doc