Based on eccentricity control principle and eccentricity signal model,an eccentricity compensation project for single stand and reversing cold strip mill was studied.

The effect principle which roller eccentricity affect strip gauge was analyzed,and eccentricity compensation control dynamic structural map which apply Fast Fourier Transport(FFT)method was established.

To reduce the influence of roll eccentricity on thickness of strip,a method of roll eccentricity compensation based on RBF network is introduced which has been used on 5-stand cold tandem mill at Hebei Zhonggang Group.

This rotary planetary gear reducer is used in material elevating equipment ,has novel constructing design of floating planetary carriage and sun gear ,use advantage heat-treating technology and off-center mounting method .

In this paper, compensation techniques of seismic simulation system are introduced primarily, including geometric cross coupling compensation, overturning movement compensation, off center load compensation and force balance compensation.