Model Predictive Control of Wave Power Generation for Dual-mode Underwater Vehicles
The working principle of dual-mode underwater vehicles in power generation mode is the same as oscillating double-float wave energy converters(WECs).In order to increase the output power,effective control strategies must be adopted.The model predictive control(MPC)can effectively improve the output power of traditional WECs,but the power take-off(PTO)system is usually simplified as a counter acting force,which is used as the control quantity to optimize the mechanical power output of the system.Based on the structural and functional characteristics of dual-mode underwater vehicles,the propeller is proposed as the actuator of MPC in this paper.In order to verify the effectiveness of the control method,a state-space model of the double-float WEC from wave energy capture to electrical energy output is established,and a MPC controller is established in Simulink.The electric power output of the device with and without MPC under random wave excitation are solved.And the energy output improved by MPC is compared with the energy consumption of the actuator.The results show that the proposed MPC method can effectively improve the electrical power generation.
dual-mode underwater vehicleswave energystate space modelMPC
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