Control strategy design method of bag type dust collector

Abstract

The invention discloses a control strategy design method for a bag type dust collector. The method comprises the steps of: constructing a steady-state mathematical model of the frequency of a frequency converter, the opening degree and air flow of an electric control valve, and the air pressure difference of an air purification chamber on the basis of a steady-state data collection scheme and a transient-state data collection scheme of the bag type dust collector; open-loop control experiment process data is collected through a transient process, and model and data support is provided for a subsequent control design scheme. According to the design method, an immune algorithm is adopted to identify a parameter matrix in a state space equation, and the global convergence of a sliding mode control strategy is improved; a discrete sliding mode variable structure control method based on the reaching law is adopted, and the state of the control quantity airflow flow and the air pressure difference of the air purification chamber in the switching surface movement process is effectively analyzed, and the good stability of the whole bag type dust collector system in the state space is kept.

Description

technical field [0001] The invention relates to the field of bag type dust collectors, in particular to a control strategy design method for bag type dust collectors. Background technique [0002] The bag filter is widely used due to its efficient dust removal ability. When the bag filter works, it mainly includes two processes of dust filtration and dust cleaning. The dust filtration process first needs to start the electric control valve at the air outlet, and the induced draft fan starts to run, so that the dust-laden air flow passes through the filter bag, and the dust will be collected by the filter bag. Filtered. Dust cleaning refers to spraying pulsed compressed air through the nozzle to remove the accumulated dust on the filter bag, so that the filter bag can restore the dust removal and filtration ability. In order to make the dust removal efficiency of the bag filter reach a higher state, it is necessary to control the system operation state of the bag filter so ...

AI Technical Summary

Problems solved by technology

Most of the bag filter control systems adopt open-loop control, which is a system control method without feedback information. The traditional open-loop control method is likely to cause problems such as long adjustment time and large steady-state error, which increases energy consumption and reduces It affects the operation efficiency, which is not conducive to the stable progress of the dust removal process

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