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An Acceleration Constrained Control Algorithm for Vehicle Cruise Control System

A constant speed cruise and constraint control technology, which is applied in the field of assisted driving of smart cars, can solve problems such as acceleration constraints, achieve low fuel consumption, avoid excessive acceleration, and satisfy the effect of comfort

Active Publication Date: 2021-07-20
JIANGSU UNIV
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AI Technical Summary

Problems solved by technology

The literature "Research and Simulation of BackStepping Method for Vehicle Adaptive Cruise Control" applies the backstepping design method to design an adaptive cruise nonlinear controller, but does not constrain the acceleration of the vehicle when the longitudinal speed changes

Method used

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  • An Acceleration Constrained Control Algorithm for Vehicle Cruise Control System
  • An Acceleration Constrained Control Algorithm for Vehicle Cruise Control System
  • An Acceleration Constrained Control Algorithm for Vehicle Cruise Control System

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with accompanying drawing.

[0059] The concept of the present invention and the specific working process will be clearly and completely described below with reference to the accompanying drawings and examples. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts all belong to the present invention protected range.

[0060] Such as Figure 1-3 As shown, an acceleration-constrained control algorithm for a vehicle cruise control system consists of a vehicle model, a speed-acceleration model, and an acceleration-constrained controller.

[0061] Firstly, the velocity-acceleration model is established according to the above vehicle model; secondly, the bounds of the acceleration tracking error constraints are calcula...

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Abstract

The invention discloses an acceleration constraint control algorithm of a vehicle constant speed cruise system, which constrains the acceleration of the constant speed cruise vehicle during the speed switching process starting from the fuel consumption of the vehicle and the riding comfort of passengers. The present invention introduces the asymmetric obstacle Lyapunov function into the design of the constant speed cruise speed-acceleration controller. The controller solves the problem of excessive acceleration when the constant speed cruise speed is switched by controlling the wheel torque. The proposed The algorithm can ensure that the acceleration always works in the comfort zone, and the fuel consumption of the car is also improved without violating the constraints. During this process, there is no vibration in the braking torque and wheel speed, which further improves the comfort of the vehicle.

Description

technical field [0001] The invention relates to an intelligent car assisted driving. The control algorithm constrains the acceleration of the vehicle in the speed switching process of the constant speed cruise starting from the fuel consumption of the vehicle and the riding comfort of the passengers. Background technique [0002] The cruise control system is one of the adaptive cruise control strategies for automobiles. The main vehicle takes the speed set by the ACC system as the target speed and drives quickly after reaching the set speed. It automatically controls the longitudinal movement of the vehicle to reduce the driver's fatigue Labor intensity. If there is no vehicle in front of the main vehicle or the distance to the target vehicle ahead is very fast and the speed is very fast, the control mode selection module will activate the cruise mode control module, and the ACC system will The speed automatically adjusts the accelerator pedal, etc., so that the main vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/14B60W40/107
CPCB60W30/14B60W40/107
Inventor 何友国刘鑫袁朝春蔡英凤
Owner JIANGSU UNIV
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