Determination method of firing process performance of cement rotary kiln based on fractional lqg benchmark

Abstract

The invention relates to a cement rotary kiln firing process performance determination method based on a fractional order LQG benchmark. The method comprises the following steps: firstly, acquiring running data of a rotary cement kiln in a firing process, establishing a fractional order model of the rotary cement kiln in the firing process, further solving an optimal input variance and an output variance of the rotary cement kiln in the firing process by using a fractional order LQG reference according to the fractional order model, and finally, establishing a performance balance curve of therotary cement kiln in the firing process. The control precision of the sintering process of the rotary cement kiln can be guaranteed, meanwhile, good input performance is considered, and stable high-precision control and low-energy-consumption control of the sintering process of the rotary cement kiln are achieved.

Description

technical field [0001] The invention belongs to the field of automatic industrial process control, and relates to a method for determining the performance of a cement rotary kiln firing process based on a fractional-order LQG benchmark. Background technique [0002] In the firing process of cement rotary kiln, many controllers of the process control loop have good performance at the initial stage of operation, but after a period of operation, affected by the complex industrial environment, the performance of the controller will decline, resulting in the failure of the control system The decrease of control accuracy will eventually lead to the reduction of cement clinker quality, the increase of enterprise operating costs and the waste of resources. Therefore, it is necessary to design a method for determining the performance of the cement rotary kiln firing process to ensure the control system of the cement rotary kiln firing process. normal operation. [0003] Most of the ...

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Problems solved by technology

[0002] In the firing process of cement rotary kiln, many controllers of the process control loop have good performance at the initial stage of operation, but after a period of operation, affected by the complex industrial environment, the performance of the controller will decline, resulting in the failure of the control system The decrease of control accuracy will eventually lead to the reduction of cement clinker quality, the increase of enterprise operating costs and the waste of resources. Therefore, it is necessary to design a method for determining the performance of the cement rotary kiln firing process to ensure the control system of the cement rotary kiln firing process. normal operation

[0003] Traditional methods are mostly based on MVC benchmarks, but the robustness of MVC benchmarks is poor, and it is impossible to achieve a trade-off with input performance. At the same time, the existing LQG benchmarks can only be used for integer-order processes.

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