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Diesel engine electronic speed adjusting method based on reinforced study of proportion integration differentiation (PID) controller

A technology of intensive learning and electronic speed regulation, which is applied in engine control, fuel injection control, machine/engine, etc., can solve the problems of no online learning ability, poor adaptability, and difficulty in obtaining teacher signals, so as to improve the adaptability of diesel engine electronic speed regulation capabilities, and the effectiveness of improving operational indicators

Inactive Publication Date: 2012-11-21
HARBIN ENG UNIV
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Problems solved by technology

", its shortcoming is that supervised learning is used for parameter optimization, and the teacher signal of supervised learning is difficult to obtain. In addition, this control method has no online learning ability, so its adaptability is poor

Method used

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  • Diesel engine electronic speed adjusting method based on reinforced study of proportion integration differentiation (PID) controller
  • Diesel engine electronic speed adjusting method based on reinforced study of proportion integration differentiation (PID) controller
  • Diesel engine electronic speed adjusting method based on reinforced study of proportion integration differentiation (PID) controller

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Embodiment Construction

[0024] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0025] to combine figure 1 , the method of the present invention specifically comprises the following steps:

[0026] 1. The speed sensor is used to detect the speed of the diesel engine in real time, and the control parameters of the PID controller are given according to the set speed (target speed adjustment) and the current control strategy, and the PID controller outputs the corresponding control amount in the form of PWM wave.

[0027] 2. The electromagnetic actuator drives the oil pump rack according to the control quantity output by the PID controller, and changes the circulating oil supply of the oil pump to adjust the diesel engine speed.

[0028] 3. Introduce the three performance indicators of speed rise time, speed overshoot and speed amplitude to define the speed control evaluation function. Based on the diesel engine speed information feedback, eval...

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Abstract

The invention aims at providing a diesel engine electronic speed adjusting method based on reinforced study of a proportion integration differentiation (PID) controller. The method includes the following steps that initial values of ratio, integration and differentiation of the PID controller are set according to diesel engine target adjusting rotary speed, an initial control strategy of a decision unit is formed, and output control quantity of the PID controller is calculated; an electromagnetic executer drives a high-pressure fuel pump rack according to the control quantity output by the PID controller, circulation fuel supplement quantity of a fuel pump is changed, and the rotary speed of the diesel engine is adjusted; a value function of a current speed adjusting strategy is calculated, when V*(t)=ma x V(t), the current speed adjusting strategy is the optimal, when V(t) is not equal to ma x V(t), the control strategy is updated, and different PID parameter values are selected; the steps are updated in circulation mode, and finally the value function of the control strategy corresponding to different target rotary speed n1, n2,... meets the condition that V*(t)= ma x V(t). By evaluating and updating PID parameters in real time, online study of an optimal speed adjusting control strategy is achieved, electronic speed adjusting adaptability of the diesel engine is improved, and an operation index of the diesel engine is improved.

Description

technical field [0001] The invention relates to a diesel engine control method, in particular to a diesel engine speed regulation method. Background technique [0002] The century-old diesel engine has outstanding advantages such as high thermal efficiency, wide power range, and good adaptability, and is currently one of the most widely used power machines in the world. The basic condition for the stable operation of a diesel engine is that the output torque is balanced with the external load torque, and the output torque is mainly adjusted by changing the circulating oil supply (this function is realized by the diesel engine speed control system). The speed characteristic of the diesel engine is that the relationship between the output torque and the rotational speed is relatively flat, and the adaptability coefficient is relatively low. Therefore, the rotational speed of the diesel engine is greatly affected by the external load. When the load increases and the speed decr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D1/04
Inventor 王忠巍李学民马修真袁志国刘龙
Owner HARBIN ENG UNIV
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