Secondary optimization control method for firing process of rotary cement kiln

Abstract

The invention discloses a secondary optimization control method for the firing process of a rotary cement kiln. A process model is established by collecting input and output data; a process state change and an output tracking error are combined to form a new process state quantity and thus a new process model is established; and then a controller is designed by using a quadratic objective functionand an optimal update law is designed. According to the invention, the state change and output tracking error are introduced into the process and thus the adjustment of the controller becomes flexible, so that the fault tolerance of the system is improved; and the influence of partial actuator failures is reduced.

Description

technical field [0001] The invention belongs to the field of automatic industrial production process control, and relates to a secondary optimization control method for the firing process of a cement rotary kiln. Background technique [0002] In actual industrial production, industrial production process modeling and control strategies are becoming more and more important. At the same time, due to the high requirements for product quality and operational safety, the operating specifications of industrial production process production are becoming more and more stringent, which leads to the control system The probability of failure increases. For example, in the actual cement rotary kiln firing process, the kiln head coal injection actuator failure is particularly common, mainly reflected in the kiln head coal injection valve failure, which will reduce the quality of the final cement clinker, At the same time, considering that the firing process of the cement rotary kiln wil...

AI Technical Summary

Problems solved by technology

[0002] In actual industrial production, industrial production process modeling and control strategies are becoming more and more important. At the same time, due to the high requirements for product quality and operational safety, the operating specifications of industrial production process production are becoming more and more stringent, which leads to the control system Increased probability of failure

For example, in the actual cement rotary kiln firing process, the kiln head coal injection actuator failure is particularly common, mainly reflected in the kiln head coal injection valve failure, which will reduce the quality of the final cement clinker, At the same time, considering that the actuator is powered off or stuck, the firing process of the cement rotary kiln will no longer be controllable, and it will be meaningless to design the controller accordingly

Images