Combined Optimization of a Recurve Actuator and its Drive Circuit

Abstract

The integrated modeling and combined optimization of a Recurve actuator and its drive circuit is considered. A finite element model for Euler-Bernoulli beams is developed with appropriate coupling interface to the drive circuit. The finite element model considers appropriate charge variation over the actuator and leads to an energy conservative formulation. The actuator model is coupled to the electric circuit model via a charge-voltage transfer function. The drive circuit is based on a half-bridge switching amplifier topology. Both actuator and circuit physical design variables are considered in the optimization formulation. The objective is to minimize the weight of the system while satisfying performance and stability constraints. The interactions and trade offs between the actuator and the drive circuit are investigated. Optimization results show clear interrelations between the design of the electric circuit and the actuator.