The composite system of multiple liquid levels and furnace is a kind of complex industrial process with strong coupling
large delay and nonlinear characteristics. For the control of multiple liquid levels and furnace pass temperature in such systems
on the level of decoupling and balance
a variable period prediction control approach based on the total capacity is proposed. So multi-level control and pass temperature balance control is decoupled on the control structure
and coupling analysis shows the feasibility of the method. Then the overall coordination control can be realized. Simulation results on HYSYS Flow sheeting demonstrate the effectiveness of this approach.