Method for detecting intermittent oscillation of industrial control circuits in online manner
A technology of industrial control and detection method, which is applied in the direction of electrical testing/monitoring, etc., and can solve problems such as the sub-signal components are easily mixed with each other, the oscillation detection is unfavorable, and the regularity of the oscillation component cannot be quantitatively calculated, etc.
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[0084] Taking the performance evaluation of the main heating furnace in the delayed coking production process of a large petrochemical enterprise in China as an example, the detection method of the intermittent oscillation of the industrial control loop with the viscous characteristic of the control valve is described in detail.
[0085] like figure 1 As shown, the petrochemical process heating furnace is an important link in the production process and one of the main energy consumption units. The stable control of the furnace outlet temperature is of great significance for improving product quality and reducing energy consumption.
[0086] The heating furnace obtains heat through the gas supply, and the gas volume fluctuates according to the change of the upstream oil. It is necessary to control the air intake air volume to make the gas gas fully burn to obtain the maximum heat. The heat in the furnace will cause waste of fuel and loss of economic benefits. Therefore, the out...
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