A method for decoupling and continuous estimation of vehicle mass and road resistance of electric vehicles

A technology of vehicle mass and road resistance, applied in the field of transportation, can solve problems such as increasing algorithm difficulty and calculation amount

Active Publication Date: 2021-04-06
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the longitudinal dynamic equation of the vehicle, the coupling problem makes the parameter estimation of the two influence each other, and also increases the difficulty and calculation amount of the algorithm

Method used

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  • A method for decoupling and continuous estimation of vehicle mass and road resistance of electric vehicles
  • A method for decoupling and continuous estimation of vehicle mass and road resistance of electric vehicles
  • A method for decoupling and continuous estimation of vehicle mass and road resistance of electric vehicles

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Embodiment Construction

[0065] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0066] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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Abstract

An embodiment of the present invention provides a decoupling estimation method for the vehicle mass and road resistance of an electric vehicle, including: decoupling estimation of the vehicle mass and road resistance during the starting process, obtaining the estimated mean value of the vehicle mass and the road resistance coefficient; The mean value of the quality estimate, using a linear full-dimensional state observer, continuously estimates the road resistance coefficient during the vehicle's driving process. The invention also provides a method for continuously estimating the vehicle mass and road resistance under driving cycle working conditions. The embodiment of the present invention is applicable to electric vehicles whose driving force of the power system and braking torque of the braking system can be accurately obtained, including pure electric vehicles, hybrid electric vehicles with pure electric starting capability, etc.; Electric vehicles; the estimated coefficient of road resistance is the sum of grade resistance and rolling resistance and does not require separate estimates of grade resistance or rolling resistance.

Description

technical field [0001] The invention relates to the field of traffic technology, in particular to a method for decoupling and continuously estimating the vehicle mass of an electric vehicle and road resistance. Background technique [0002] For electric vehicles (pure electric vehicles or hybrid electric vehicles), energy management is an important part of vehicle control. Vehicle mass and road resistance are important parameters that affect the energy management and dynamics control of electric vehicles. Only by accurately obtaining the vehicle mass and road resistance parameters can the instantaneous energy consumption of the vehicle be calculated accurately, which is one of the basic conditions for optimal control of energy management. [0003] Since the vehicle mass and road resistance cannot be directly measured, parameter estimation using various methods and algorithms is currently the main method used in the industry. For example, a method using the least squares me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W40/06B60W40/13G06F17/11G06F17/16
CPCB60W40/06B60W40/13G06F17/11G06F17/16
Inventor 陈宏伟耿聪
Owner BEIJING JIAOTONG UNIV
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