Control strategy for simulator moving platform with enhanced reliability

The primary objective of this paper is to design a control system for an indirect frequency converter for a linear actuator employed in a 6DOF moving platform, which finds utility in simulating vehicles, aircraft, and drivers' or pilots' training. To achieve the desired performance, the proposed control strategy for the indirect frequency converter aims to accomplish two crucial goals. Firstly, it must ensure a highly responsive actuator with exceptional dynamic characteristics. Secondly, it must establish appropriate electromagnetic compatibility with the grid and the possibility of energy recuperation. Considering that the simulator is intended to be used in collaboration with a training crew, it becomes paramount to prioritize the reliability and safety of its operation. However, ensuring the reliability of the linear actuator's winding (slider) position sensor, which can be particularly challenging in this context, is crucial. As a solution, the control algorithm of the converter's output section has been extended to incorporate sensorless position and velocity estimation. This addition addresses the challenge of the position sensor mechanical installation and enhances the system's overall reliability. Selected experimental tests proved the proposed converter control system.