Dynamic balance control system and method for rotary machine

The invention discloses a dynamic balance control system and method for a rotary machine, and belongs to the field of rotary machine balance control. The system comprises a first displacement sensor, a second displacement sensor, a third displacement sensor, a fourth displacement sensor, a communication unit, an upper computer, a main control program, a data acquisition card, a controller, a photoelectric switch, a motor, a mass block and a contact switch, wherein the main control program is installed in the upper computer, the first displacement sensor, the second displacement sensor, the third displacement sensor and the fourth displacement sensor are connected with the communication unit, the communication unit, the upper computer and the data acquisition card are connected in sequence, the controller and the photoelectric switch are connected with the data acquisition card, and the motor, the mass block and the contact switch are connected with the controller. and a sub-controller is correspondingly conne