Development of a HiL Load Simulator for Experimental Investigation of Translational Oscillating Systems

摘要

In this paper, the principle of a hardware in the loop (HiL) load simulator is applied on an amplitude-controlled translational oscillatory actuator (TOA). For this purpose, an electromechanical actuator is designed and build, that can emulate different oscillating load characteristics. To describe the system, consisting of a translational oscillatory actuator and the HiL actuator, a nonlinear model is derived. Next, a general averaged model is set up comprising several time-varying Fourier coefficient. The controller is based on a linearized averaged model and considers a multi variable structure to control both amplitude and phase of the applied force. Finally, the concept is validated using simulations and experiments. The results show, that the designed controller with the realised hardware can robustly emulate a desired load on an amplitude-controlled TOA under investigation. Because of its high sensitivity to temperature, a force measurement using strain gauges was not applicable. Instead, the output equation of the nonlinear state space model was used to estimate the load force.