Abstract: This paper describes the design of pseudorandom binary sequence correlator based on the principles of on-line identification. An experimental procedure is suggested, Therefore a multi-periods inverse-repeat m sequence is synchronized with real time binomial weighted averaging in order to eliminate the effect of polynomial drift to the estimated impulse response. The system is prior excited by a periodic pseudorandom signal. it can eliminate the effects of non-stationary process. Two m sequence of inverse-repeat shifting 1/2 half-periods can be considered as independent Sequence, which identify a multidimensionall system. The experiments have proved the effectiveness of these methods which increases identification accuracy and eniarge. The functon of The equipment function. At last, this paper presents the on-line identification and the on-line regulaton of control systems for cold rolling mills.