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Longitudinal acceleration control method based on MAP diagram and online calibration

A technology of longitudinal acceleration and MAP diagram, which is applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of automobile cost control, usability, and real-time control, and reduce system development time Effects of cost and economic cost, reduction of system development cost, and shortening of system development cycle

Inactive Publication Date: 2017-10-27
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of calculation of the model, it is difficult to meet the requirements of real-time control
Based on the method of machine learning, the required sample size is large, the cycle is long, and the required processor cost is high, which makes it difficult to control the cost of the car
At the same time, because the driving behavior characteristics of the actual driver are different due to the difference of the person, the state of the driver, and the traffic environment, it is difficult to obtain and accurately describe, so that there is a large error in its control, and it is difficult to meet the requirements of usability.

Method used

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  • Longitudinal acceleration control method based on MAP diagram and online calibration
  • Longitudinal acceleration control method based on MAP diagram and online calibration
  • Longitudinal acceleration control method based on MAP diagram and online calibration

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Experimental program
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Embodiment approach

[0050] The invention designs a longitudinal acceleration control method based on MAP and online calibration for the following control of the longitudinal acceleration of the vehicle by the lower controller. The MAP diagram based on the parametric model can meet the real-time requirements of the control system while compensating the nonlinear characteristics of the system, and has certain versatility, which can reduce the economic and time costs caused by road tests. On the one hand, the online calibration process can correct the control error caused by the model and test accuracy through the collection and statistical analysis of the real-time running data of the vehicle; Control the MAP diagram for correction to ensure the control accuracy of the system and the stability of operation during the vehicle's service life. Concrete implementation scheme is as follows:

[0051] Step 1. Use the vehicle dynamics software to establish an accurate vehicle longitudinal dynamics paramet...

specific Embodiment

[0089] Taking a B-class car platform as an example, the road simulation experiment is carried out based on the Carsim platform

[0090] Step 1: Build a vehicle dynamics model.

[0091] According to the dynamic model in CarSim, select similar models of the same level (body shape and size, power system structure,) as the reference model. According to the structure of the vehicle dynamics model in CarSim, the characteristic parameters of system components such as body size, engine, transmission, final drive, tires, hydraulic brakes, etc. are input in sequence, and the longitudinal dynamic model of the experimental target vehicle is built.

[0092] Step 2: Build a simulated road experiment environment.

[0093] Build a simulated road experiment simulation environment in CarSim.

[0094] 2.1 Set up the simulation environment. In CarSim, set the Driver Controls in order to open the ring valve, brake pressure, fixed gear position, and driver path following mode; set the simulated r...

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Abstract

The present invention provides a longitudinal acceleration control method based on MAP diagram and online calibration. The method comprises the steps of (1) establishing a vehicle longitudinal dynamics parameter model and building a vehicle simulation environment, (2) inputting target vehicle model parameters into the model, (3) carrying out a simulation road test to draw a vehicle longitudinal acceleration control MAP diagram, (4) with the combination of an approximate linear system formed by the MAP diagram and vehicle longitudinal dynamics, giving a corresponding guide longitudinal acceleration, and (5) carrying out online calibration on the base of the drawn MAP diagram. The method is the longitudinal acceleration control method based on the MAP diagram, system development cost brought by a road test can be reduced, the system development period is shortened, the online calibration is used to carry out further precise calibration on a common vehicle speed interval and a corresponding acceleration interval, on one hand, the inaccuracy of vehicle longitudinal dynamics model modeling can be made up, on the other hand, a problem of system aging caused by the increase of using time can be relieved.

Description

technical field [0001] The invention belongs to the technical field of automobile auxiliary driving, in particular to a longitudinal acceleration control method based on a MAP map and online calibration. Background technique [0002] In recent years, driver assistance systems and automatic driving technologies have received more and more attention. Among them, the adaptive cruise control system can realize the automatic control of various working conditions such as constant speed cruise, automatic follow-up driving, parallel driving and lane-changing overtaking. Driving, which can effectively reduce the driver's driving intensity and improve vehicle safety and comfort, has gradually become a research and development hotspot in recent years. [0003] The adaptive cruise control system usually adopts a layered control algorithm. The upper controller usually designs different control modes according to typical traffic conditions. and the control algorithm in the corresponding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 叶一凡赵健吴坚
Owner JILIN UNIV
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