ADRC gas injection quantity closed-loop control method based on high-pressure natural gas circulation gas injection quantity real-time detection

Abstract

The invention discloses an ADRC gas injection quantity closed-loop control method based on high-pressure natural gas circulation gas injection quantity real-time detection, which comprises the following steps: collecting an inlet pressure signal, and taking the inlet pressure signal as gas injection quantity change information based on the same change rule of the change rate of the inlet pressure signal and the gas injection quantity of an injector; establishing an air injection quantity prediction model by using an RBF neural network and training to obtain an air injection quantity calculation model to solve a real-time air injection quantity; and based on an ADRC controller, the difference between the real-time air injection amount and the target air injection amount is obtained, an error is calculated through a TD tracking differentiator, the difference value is subjected to error-based control amount output through a nonlinear control law NLSEF, real-time total disturbance compensation output by an extended observer ESO is superposed, a next air injection pulse width instruction is given to output the target air injection amount, and the previous steps are iterated. According to the method, the problems of large overshoot, low control speed and the like of traditional PID control are solved, and real-time closed-loop control with online sensing information as feedback is realized.

Description

technical field [0001] The invention relates to the technical field of power energy, in particular to a closed-loop control method of ADRC injection volume based on real-time detection of the injection volume of a high-pressure natural gas cycle. Background technique [0002] With the increasingly stringent emission regulations, various mainstream dual-fuel engine technologies cannot meet the requirements of power performance and emission performance at the same time, and the rapid development of engine electronic control technology has become one of the leading technologies in the internal combustion engine industry. The fuel engine provides an extremely superior policy basis, broad market demand and huge development potential, which has led to the natural gas direct injection technology becoming the only way for the technological development of the natural gas engine industry. [0003] Due to the complex pneumatic-hydraulic-electrical structure inside the injector, its wor...

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Problems solved by technology

[0007] For this reason, the object of the present invention is to propose a kind of ADRC gas injection volume closed-loop control method based on the real-time detection of high-pressure natural gas circulation injection volume, which overcomes the traditional PID control Large overshoot, slow control speed and other problems, realize real-time closed-loop control with online perception information as feedback

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