Modeling of cement raw material vertical grinding system and nonsingular terminal sliding mode control

摘要

In this paper, for the cement raw material vertical grinding system, firstly, we collect the field data to establish the mathematical model of the delay difference equation, and transform it into the state space equation by the method of variable substitution. Then, the nonsingular terminal sliding mode controller is designed to realize the fast convergence, the double power approach law is adopted to improve the system dynamics and an integral term is added to the sliding mode controller to suppress the effect of time delay on system stability. Lyapunov function proves that the sliding surface can converge to zero in a finite time. Finally, the simulation results show that the control scheme proposed is effective.