Air pressure redundancy brake signal generator and unmanned driving system

The utility model discloses an air pressure redundancy brake signal generator and an unmanned driving system. The air pressure redundancy brake signal generator comprises a valve body assembly, a first brake control unit and a second brake control unit, and the valve body assembly is provided with a first air inlet, a first air outlet, a second air inlet and a second air outlet; the first brake control unit comprises a first piston and a first control valve, and a first gas cavity is defined by the first control valve and the inner wall of the valve body assembly; the second brake control unit comprises a second piston and a second control valve, and a second gas cavity is defined by the second control valve and the inner wall of the valve body assembly. In the utility model, the first piston moves towards the direction of the first control valve, so that the first gas outlet is communicated with the first gas chamber to form primary redundancy; and when the first piston continues to move, the gas in the firs