Spaceflight mechanism constant speed rotation system

The invention provides a spaceflight mechanism constant speed rotation system. The spaceflight mechanism comprises a host computer, a servo drive, a brushless direct current motor and a feedback object resolver. The host computer is used for sending a control command signal to the servo drive and receiving a telemetry signal fed back by the servo drive. The servo drive receives and decomposes the control command signal and controls the brushless direct current motor to rotate according to the control command signal. The brushless direct current motor rotates according to a certain direction and a constant rotation speed under the control of the servo drive. The feedback object resolver carries out real-time detection on an angle signal of the brushless direct current motor and sending the signal to the servo drive. The servo drive controls the brushless direct current motor to keep the constant rotation speed according to the angle signal. According to the invention, FPGA is used as the core control module of