A single axis Integrated Power and Attitude Control System(IPACS) with double flywheels,including its working principle and configuration,were given to simulate the charge,discharge and the attitude control process during the full sun and the eclipse.The simulation analysis results show that single axis IPACS with double flywheels is feasible.The impact of the system parameter on the control precision was discussed,then the parameter optimization approach was offered.A experimental equipment of single axis attitude control and energy storage system was founded and the experiments on 20 000 r/min speed show that the system can be used to store and release energy while adjusting the attitudes of a platform or a satellite.The angle of the platform can be controlled within 1.5° and 1.2′,respectively,when the bus DC voltage is 24 V and the fluctuating is less than 1.8%.After eliminating unbalance affection,such as the difference in motors,the scheme using flywheels to perform the energy storage and attitude control in the satellite is effective.