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BP-RNN gearshift integral PID algorithm for automobile chassis dynamometer

A technology of automobile chassis and variable speed integration, which is applied to controllers with specific characteristics, electric controllers, etc., can solve problems such as insufficient accuracy and static error, and achieve good versatility, avoid accumulated errors, and reduce overshoot. Effect

Inactive Publication Date: 2019-08-30
CHANGAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of BP~RNN variable speed integral PID algorithm facing the automobile chassis dynamometer, in order to solve the problem that the PID algorithm in the prior art has static error and causes insufficient accuracy

Method used

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  • BP-RNN gearshift integral PID algorithm for automobile chassis dynamometer
  • BP-RNN gearshift integral PID algorithm for automobile chassis dynamometer
  • BP-RNN gearshift integral PID algorithm for automobile chassis dynamometer

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Embodiment Construction

[0039] In this embodiment, a BP-RNN variable speed integral PID algorithm for automobile chassis dynamometer is disclosed, and the method includes the following steps:

[0040] Step 1: Sampling the running state of the automobile chassis dynamometer at historical moments, obtaining historical sampling data, and using the historical sampling data as a training set;

[0041] Step 2: Establish and initialize the BP neural network model, use the training set obtained in step 1 to train the BP neural network model and correct the weight coefficients of each layer of the BP neural network to obtain an optimized BP neural network model;

[0042] Step 3: Establish and initialize the RNN network model, use the training set obtained in step 1 to train the RNN network model and correct the weight coefficients of each layer of the RNN network to obtain an optimized RNN network model;

[0043] Step 4: Sampling the running state of the automobile chassis dynamometer at the current moment to...

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Abstract

The present invention belongs to the technical field of automatic control, and particularly relates to a BP-RNN gearshift integral PID algorithm for an automobile chassis dynamometer. The algorithm comprises the following steps: step 1, the running status of the automobile chassis dynamometer at historical moments is sampled to obtain historical sampling data as a training set; step 2, a BP neuralnetwork model is established, initialized and trained, and a weight coefficient of each layer in the BP neural network is modified; step 3, a RNN network model is established, initialized and trained, and a weight coefficient of each layer in the RNN network is modified; step 4, the running status of the automobile chassis dynamometer at the present is sampled to obtain the current sampling data,the current sampling data is respectively input into the BP neural network model and the RNN network model to obtain parameters of the automobile chassis dynamometer PID controller; step 5, the control quantity is calculated to control the automobile chassis dynamometer. The invention can effectively solve the problem that an integral term coefficient of the traditional gearshift integral PID isdifficult to judge; the amount of processed data is greatly reduced; and the cumulative error is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a BP-RNN variable speed integral PID algorithm for automobile chassis dynamometers. Background technique [0002] Automobile chassis dynamometer is a special machine for measuring automobile dynamic performance, chassis output power, multi-working condition emission indicators and fuel consumption. It uses the moment of inertia of the flywheel inertia to simulate the moment of inertia when the car is running and the inertia of the car's linear motion mass, and uses a loading device to simulate the air resistance, rolling resistance and climbing resistance of the non-driving wheel during the operation of the car. , to simulate the road surface through the rotating motion of the drum, and dynamically detect the running status of the car. In order to make the operation of the drum of the automobile chassis dynamometer meet the real-time requirements in the wor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 周洲程鑫陈宇轩赵祥模张立成郝茹茹尚旭明王钰韩睿之王宏飞常惠
Owner CHANGAN UNIV
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