Repetitive control in momentum compensation for satellite rotating part
Shuang Li · Dianji yu kongzhi xuebao · 2012
According to the negative impact of satellite rotating parts period motion on attitude control accuracy,a compensation wheel is used to counteract the disturbance.Repetitive control method was well known for its advantage of high accuracy in tracking period signal or suppressing periodic interference.By this nature,original PID controller introduced repetitive control for improving angle tracking performance.The friction torque of rotating part downgraded the compensating effect and that also could be restrained by repetitive control for enhancing the compensating result.The motion characteristic of payload was given.The characteristic of friction torque was analyzed based on Karnopp friction model.The simulation section gives compensation simulation,and the results reveal that repetitive control contributes much in the improvement of compensating accuracy,which counteracts 99% momentum disturbance.