Unlock instant, AI-driven research and patent intelligence for your innovation.

A Dynamic Estimation Method of Vehicle State Parameters

A technology of dynamic estimation and vehicle state, which is applied in the field of dynamic estimation of state parameters, can solve the problems of signal noise having a great influence on the estimation result, high hardware cost, etc., and achieve good estimation effect, reduced hardware cost, and good usability

Active Publication Date: 2019-02-12
CHINA FIRST AUTOMOBILE
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the methods disclosed in the above-mentioned Patent Documents 1 and 2 rely on the on-board accelerometer or on-board GPS when estimating the vehicle state parameters, which requires high hardware costs
When the road conditions are complex, the signal noise has a great influence on the estimation results

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Dynamic Estimation Method of Vehicle State Parameters
  • A Dynamic Estimation Method of Vehicle State Parameters
  • A Dynamic Estimation Method of Vehicle State Parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0036] figure 1 It is a flow chart of the method for dynamic estimation of vehicle state parameters in the present invention. Such as figure 1 As shown, the method for dynamic estimation of vehicle state parameters in the present invention mainly includes two parts: vehicle mass estimation and road gradient estimation. Before introducing the dynamic estimation method of vehicle state parameters in the present invention, the formulas used in the present invention for estimating the vehicle mass and road gradient are introduced.

[0037] First, in order to estimate the vehicle dynamic mass, the vehicle dynamics equation shown in the following formula (1) can be established.

[0038]

[0039] In the formula, F x is the longitudinal driving force; m ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a vehicle state parameter dynamic estimation method. The vehicle state parameter dynamic estimation method comprises the following steps that in a set sampling period, the wheel speed information provided by a vehicle CAN bus and the output torque information of a drive device are collected, and the collected information are preprocesses; based on the collected wheel speed information and the output torque information, the whole vehicle dynamic mass of a vehicle is estimated; and based on the estimated whole vehicle dynamic mass, the road grade is estimated. According to the vehicle state parameter dynamic estimation method, the whole vehicle-mounted CAN bus information is used as an information source, no accelerometer or GPS is needed, and hardware cost is reduced. A signal is derived from the CAN bus, and the dynamic estimation method is insensitive to the vehicle working condition state and external disturbance and good in system environment adaptability and estimation effect and has good usability.

Description

technical field [0001] The invention relates to a method for dynamically estimating state parameters of a vehicle, in particular to a method for dynamically estimating state parameters of an electric vehicle with a motor as a power source. Background technique [0002] Accurate vehicle state parameters (vehicle quality information and road slope information) are of great significance for improving the control effect of some intelligent subsystems widely used in vehicle control systems. These intelligent subsystems can be: uphill assistance system, active emergency braking system, ESP system, etc. The vehicle state parameters can also be used for estimating the road surface adhesion coefficient, estimating the remaining mileage and so on. [0003] Patent Document 1 (Application No.: 201210071906.3) discloses a vehicle-mounted road gradient detection method and device, which uses a vehicle-mounted vehicle speed sensor to detect vehicle speed information in real time, and esti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60W40/105B60W40/13B60W40/076
CPCB60W40/076B60W40/105B60W40/13B60W2520/10
Inventor 郭福军杨兴旺
Owner CHINA FIRST AUTOMOBILE