Energy Optimal Control of Electro-mechanical Systems Trade-off Demands
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Power Electronics and Drives 2025;10 (45)
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ABSTRACT
The study presents research on the impact of the selection of the required maneuver time on the energy consumption of an electrome-chanical system, using the example of a train. Two different energy conservation control strategies (Energy-Optimal and Energy-Near-Optimal) were applied to assess their consumption as a function of recommended travel time. The optimal control variables are provid-ed by an energy-saving reference position generator, whose outputs are then faithfully followed by means of a feedback control based on field orientation and accomplished with a matched zero-dynamic lag pre-compensator yielding the required closed-loop dynamics. The load torque, consisting of constant, linear, and quadratic components as a function of speed, is treated as a state variable. The po-tential for energy savings by reducing the speed of such systems was verified through MATLAB simulations. As a representative con-trolled electromechanical system, a suburban train unit was chosen for simulations to evaluate the energy consumption of both control approaches.