Double-closed-loop redundant control valve port independent electro-hydraulic valve and working method thereof

The invention relates to a double-closed-loop redundant control valve port independent electro-hydraulic valve and a working method thereof. The double-closed-loop redundant control valve port independent electro-hydraulic valve integrates a displacement-force feedback mechanical inner closed loop control mode and an electric feedback outer closed loop control mode. The electric feedback outer closed-loop control realizes valve port flow closed-loop control and execution mechanism back pressure closed-loop control under temperature compensation according to collected pressure, oil temperature and main valve core displacement signals, and improves the valve port flow control precision and the pressure control precision; the displacement-force feedback mechanical inner closed loop can still ensure that the system functions normally operate under certain precision in an electric feedback outer closed loop failure mode, and the redundancy and reliability of the system are improved; meanwhile, a failure switching module is arranged, through a displacement-force feedback mechanical inner closed loop stable switching control strategy, stable switching from electric closed loop failure to mechanical inner closed loop is achieved, and the system stability is improved; double-closed-loop redundancy control can be flexibly switched on and off according to working conditions, and the working condition adaptability is high.