Control system and method for dual-redundancy electric steering engine

The invention provides a control system for a dual-redundancy electric steering engine. The control system comprises a first motor and a second motor for power input of a differential epicyclic gear train speed reducer for controlling the steering engine, a first position sensor and a second position sensor used for acquiring motion state of the steering engine, and a first digital control unit and a second digital control unit used for respectively receiving signals of the first position sensor and the second position sensor, the first motor and the second motor are respectively provided with a first brake and a second brake, the first brake and the second brake are respectively connected with output terminals of the first digital control unit and the second digital control unit, the first digital control unit and the second digital control unit respectively send control signals to the first motor and the second motor via a first inverter and a second inverter, the first inverter and the second inverter are respectively provided with a first bridge current sensor and a second bridge current sensor used for transmitting bridge current sampling signals to the first digital control unit and the second digital control unit, the first digital control unit and the second digital control unit respectively receive steering instruction signals for controlling a computer via a CAN bus interface, the first digital control unit and the second digital control unit are mutually connected and communicate with each other, and the first digital control unit and the second digital control unit are heat backups to each other.