Control system for electromechanical linear actuator

Résumé fourni par la source

Background: Improving the reliability of mainline pipelines. Aim: To develop and implement, within the SimInTech environment, a block diagram of an electromechanical linear actuator with an integrated control system, and to determine the resulting torque developed by the drive and its ability to match the operating loads encountered during gate travel. Methods: An integrated approach to control system synthesis for a direct-drive electromechanical linear actuator of a mainline pipeline gate valve is considered. Analytical expressions for the components of load torque, incorporated into the plant mathematical model, are derived both analytically and through simulation. Using the Ansys engineering analysis suite, and accounting for the varying hydraulic circuit parameters and the drive's external hydraulic characteristics, the loads exerted on the actuator by the working fluid during valve closure are established and approximated by an exponential function. The key parameters governing the selection of drive mechanism power are justified based on motor design specifics and the liquid transport process. The control law ensuring a prescribed gate traversal speed is substantiated. Control performance indices are determined based on the correlation coefficient of the approximated load characteristic. Results: A block diagram of an electromechanical linear actuator with an integrated control system was developed and implemented in SimInTech. The resulting torque characteristic of the drive is presented, and its agreement with the actual loads during gate movement is demonstrated. Conclusion: Simulation results confirm that the developed control system delivers the required dynamic performance for the electromechanical linear actuator of the gate valve.

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