Fuzzy Control Strategy of Hydraulic Road Pressure Power Generation System

Abstract Vehicles traveling on roads produce substantial pressure energy, which offers a novel approach to addressing the power supply needs of roadside facilities. This study proposes a hydraulic energy storage-based road pressure power generation system and develops a system model that delineates the transmission path of wheel pressure energy when a vehicle passes. It also investigates the impacts of different vehicle types and operating speeds on the power generation system. Theoretical models are established for pressure energy capture, hydraulic energy storage, proportional flow valves, as well as torque balance and power transmission between hydraulic motors and generators. A dual-target fuzzy control strategy is proposed to regulate both the opening pressure of the accumulator and the opening degree of the proportional flow valve, thereby enhancing the stability of the system’s output. Simulation and experimental results demonstrate that the adoption of this two-stage fuzzy control strategy enables the energy storage unit to select the optimal opening pressure according to real-time traffic conditions, stabilize the flow rate of the energy release unit, and improve the power generation efficiency of the system. This work lays a solid theoretical foundation for the collection and utilization of road pressure energy.