Analysis of influence of notch filter on the system stability

Two methods,namely conventional notch filter and general notch filter,of control of unbalance vibration for an electrostatic levitation system are presented in this paper.The performance of the two ways is compared as well.On the condition of keeping the system stability the central frequency of the conventional notch filter is restricted by the systematic parameters and its algorithm is easy to realize,on the contrary the general notch filter is not,which are confirmed through simulation on computers.