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Oxidation tank temperature control method based on fractional order controller

A temperature control method and controller technology, applied in the field of control, can solve problems such as the inability to guarantee the stability, robustness, and dynamic performance of an oxidation tank, and achieve improved fractional-order PID controller parameter optimization efficiency, small overshoot and Effect of Steady State Error, Short Settling Time and Rise Time

Active Publication Date: 2020-11-27
XINJIANG UNIVERSITY
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Problems solved by technology

[0006] The purpose of the present invention is to provide a temperature control method for an oxidation tank based on a fractional-order controller, to solve the problem that the existing fractional-order controller cannot guarantee the stability, robustness and dynamic performance of the oxidation tank in a complex external environment question

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  • Oxidation tank temperature control method based on fractional order controller
  • Oxidation tank temperature control method based on fractional order controller
  • Oxidation tank temperature control method based on fractional order controller

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Embodiment 1

[0047] see figure 1 As shown, in the principle of fractional-order PID control in the prior art, R(t) is a given value, Y(t) is an actual output value, U(t) is an output value of fractional-order PID control, E(t ) is the control deviation; the controller is composed of a proportional unit (P), an integral unit (I) and a differential unit (D). The controller takes the control deviation E(t) as input, and compares the proportional coefficient, the integral coefficient, the differential coefficient, The adjustment of the integral order and the differential order realizes the adjustment of the output U(t). In the control process, given the input signal, that is, the reference signal and the control object, the fractional-order PID controller can process the tracking error to make the output of the control object approach the input signal. The specific processing method is as follows: The Plath transfer function says:

[0048] G(s)=K p +K I the s -λ +K D the s μ ;

[0049]...

Embodiment 2

[0055] see figure 2 As shown, in the bio-oxidation gold extraction process, the oxidation process of bacteria is an exothermic reaction. In order to make the bacteria have a suitable growth environment, it is necessary to add a heat exchange system in the oxidation tank, and adjust the entire system by adjusting the heat of circulating water. temperature.

[0056] According to the process requirements, when the temperature of the oxidation tank is lower than the set value, the regulating valve 2 is opened, and as the temperature of the oxidation tank increases, the opening of the regulating valve gradually decreases until it reaches a given temperature and is completely closed; when the temperature of the oxidation tank When it is higher than the set value, the regulating valve 1 is opened, and the opening degree of the regulating valve increases gradually as the temperature rises, thereby realizing split-range control.

Embodiment 3

[0058] see image 3 As shown, the embodiment of the present invention provides a structural diagram of an oxidation tank temperature control system. The control system includes a fractional-order controller, a regulating valve, a controlled object and a temperature sensor. The fractional-order controller controls the controlled object through a regulating valve, and the temperature sensor The temperature of the controlled object environment is monitored in real time, and the temperature value is fed back to the fractional order controller.

[0059] The invention is a temperature control method of an oxidation tank based on a fractional order controller, comprising the following steps:

[0060] Step 1: Construct the objective function of the fractional-order PID controller parameter tuning problem;

[0061] Step 2: Determine the parameters of the fractional-order PID controller through a hybrid optimization algorithm;

[0062] Step 3: The fractional order PID controller contr...

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Abstract

The invention discloses an oxidation tank temperature control method based on a fractional order controller, and relates to the technical field of control. The method comprises the following steps: 1,constructing a target function of a fractional order PID controller parameter setting problem; 2, determining parameters of the fractional order PID controller through a hybrid optimization algorithm; 3, controling the temperature of the oxidation tank by the fractional order PID controller. The hybrid optimization algorithm in the step 2 is an ACO-PSO hybrid algorithm. According to the invention, the fractional order PID controller parameters are set through the ACO-PSO algorithm; and a control object in the oxidation tank temperature control system is controlled by using the fractional order PID controller after parameter setting is completed. The parameter optimization efficiency and convergence rate of the fractional order PID controller and the control performance of the fractional order PID controller are improved, so that the control system has smaller overshoot and steady-state error, shorter adjustment time and rise time, and stronger anti-interference performance.

Description

technical field [0001] The invention belongs to the technical field of control, in particular to a temperature control method of an oxidation tank based on a fractional order controller. Background technique [0002] Affected by conditions such as high altitude, large temperature difference between day and night, strong wind and heavy snow in alpine areas, the temperature in the oxidation tank shows certain differences in different seasons and different times, and temperature is a necessary condition for the survival of bacteria in the oxidation tank. , Therefore, in order to increase the metallurgical leaching rate, the activity of bacteria in the biological oxidation tank must be increased, and the optimum survival temperature of bacteria in the oxidation tank must be maintained. [0003] The algorithm of the proportional-integral-derivative controller is a summary and imitation of the simple and effective operation mode of human beings, and has the advantages of simple al...

Claims

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Application Information

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IPC IPC(8): G05B11/42G05B13/04C12M1/38
CPCG05B11/42G05B13/042C12M41/12Y02P10/20
Inventor 高丙朋
Owner XINJIANG UNIVERSITY
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