Simulation Modeling And Analysis Of Gyrowheel

The Gyrowheel,as a new component of the spacecraft attitude control system,can simultaneously have the ability to act as an actuator to output control torque in a spacecraft attitude control system and as the attitude sensor to measure the attitude of the spacecraft relative to the inertial space.It is the feature that the gyrowheel can act as an actuator and a sensor at the same time,which can significantly reduce the volume,quality and cost of the hardware part of the spacecraft attitude control system.This is of great significance in the development of microsatellites.This paper first compares with the traditional dynamic gyro,introduces the mechanical structure of the gyrowheel,defines the relevant coordinate system and establishes the two-axis motion equation based on the Euler dynamic equation.On this basis,the working mechanism of the gyrowheel as the attitude control element for the sensitive spacecraft tilting and output torque is described.Afterwards,the gyrowheel was mathematically modeled based on the multi-rigid system dynamics and verified with the Simulink module.On this basis,the method of establishing the Adams virtual prototype is described.Using the virtual prototype simulation model established by Adams,the above-mentioned multi-body dynamic model is verified and the correctness of the ideal model is determined.Based on the obtained model,four kinds of unsatisfactory factors,were proposed and verified respectively.This kind of non-ideal factor adds the consistency of the latter two simulation models,and thus further analyzes the effects of four undesirable factors on the gyrowheel rotor motion characteristics through simulation data and concludes.Finally,on the basis of verifying the consistency between the cross universal joint in the actual prototype and the flexible structure in the simulation model,the prototype test experiment was conducted to compare the change trend of the output characteristics of the actual prototype and the simulation model under the same experimental conditions.The simulation model of the friction torque of the supporting structure was added for verification and the limitation of the simulation model was proposed.