High-Bandwidth Servovalve for Motion Simulation

Hardware-in-the-loop (HWIL) motion simulation is a valuable tool in testing and development of missile seekers. Increased bandwidth in the simulation is desired to enhance the fidelity of the testing. Existing systems that use servohydraulic actuation are fundamentally constrained because of limits in servovalves and other components. Yet hydraulic actuation retains advantages in the levels of force that can be generated in a compact volume. The key is the servovalve. This research concentrates on the development of high bandwidth servovalves. Component-level requirements will be determined based on multi-axis HWIL needs. Design of servovalves will focus on actuation with either electromagnetic transduction or smart materials. Two alternate architectures will be the bases for designs for a 1 kHz bandwidth valve. A major portion of the valve based on the preferred design will be fabricated and tested, and the design will be updated based on test results. In Phase 2, a unit scaled for a high bandwidth motion simulator will be built. A six-axis motion system based on the valve will be designed and a series of analyses and tests will be used to show the expected performance of the system.