Exercise bicycle constant power output device in microgravity environment

The utility model discloses a constant-power output device of an exercise bicycle in a microgravity environment. The device comprises a supporting assembly used for fixing, a controller connected with the supporting assembly, an electromagnetic damper fixed to the supporting assembly through a bearing and electrically connected with the controller, a driven wheel in transmission connection with the electromagnetic damper and a driving wheel in transmission connection with the driven wheel. The crank is connected with the driving wheel, and the pedal assembly is connected with the crank. According to the utility model, the electromagnetic damper is adopted, so that the power adjustment of the damper is maintained by changing the magnitude of excitation current; the load current of the electromagnetic damper is kept constant through the controller; according to the constant-power exercise bicycle, the footsteps of a trainer are fixed through the pedal assembly so as to overcome microgravity and achieve enough f