A novel super-twisting sliding mode control structure incorporating fuzzy logic for fuel regulator applications

To address the pronounced fuel supply fluctuations in afterburner fuel regulators, this study proposes a precision control strategy targeting the core metering valve. By integrating the servo valve and metering valve into a valve-controlled hydraulic cylinder system, a transfer function model is established to characterize the system dynamics. A hybrid control framework is developed, combining a super-twisting sliding mode controller (STC) with adaptive fuzzy logic to dynamically adjust sliding mode switching terms. This approach enables disturbance-adaptive regulation of the valve spool position, ensuring rapid tracking of reference signals while significantly reducing displacement errors. The integration of fuzzy logic with an optimized exponential term in the sliding variable further suppresses chattering phenomena, enhancing robustness without compromising tracking agility. These advancements provide a viable solution for high-precision fuel metering in military aeroengines, particularly in scenarios demanding stringent thrust stability and rapid dynamic response.