Open Loop Nonlinear Optimal Tracking Control of a Magnetostrictive Terfenol-D Actuator

摘要

A homogenized energy model was implemented in a model-based nonlinear control design to accurately track a reference displacement signal for high frequency magnetostrictive actuator applications. Rate dependent nonlinear and hysteretic magnetostrictive constitutive behavior is incorporated into the finite-dimensional optimal control design to improve control at high frequency. The integration of the rate-dependent nonlinear and hysteretic magnetostrictive constitutive model in the control design minimized the amount of feedback required for precision control. The control design is validated experimentally and shown to accurately track a reference signal at frequencies up to at least 1 kHz.