Method for estimating automobile quality and road grade by taking parameter coupling relationship into consideration

A technology of road slope and coupling relationship, which is applied in the field of intelligent transportation, can solve the problem of increasing the complexity of the estimation process of roads, and achieve the effect of improving adaptability, precision and comfortable driving

Inactive Publication Date: 2018-12-07
CHONGQING UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many methods in this regard, a common difficulty lies in the decoupling of the vehicle's own parameters (weight, etc.) and external resistance (slope) changes. In addition, the time-varying nature of the road also increases the complexity of the estimation process

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  • Method for estimating automobile quality and road grade by taking parameter coupling relationship into consideration
  • Method for estimating automobile quality and road grade by taking parameter coupling relationship into consideration
  • Method for estimating automobile quality and road grade by taking parameter coupling relationship into consideration

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Embodiment Construction

[0032] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] see Figure 1 to Figure 3 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arb...

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Abstract

The invention discloses a method for estimating the automobile quality and road grade by taking a parameter coupling relationship into consideration. The method comprises the steps that firstly, automobile state data and automobile inherent parameters are obtained, and an acceleration a at the time of k and a speed changer transmission ratio i<g> is calculated; secondly, an automobile qualitymodel and a road grade model are established; thirdly, a least square quality estimation model and a Kalman filter grade estimation model are constructed based on the automobile quality model and theroad grade model correspondingly; and fourthly, combined estimation of the automobile quality and the road grade is conducted through nested cyclic iteration. According to the method, real-time road grade information and the automobile load situation are provided for an automobile intelligent system, the important basis is provided for automatic driving assisting decision, environment-friendly driving and automatic speed changer gear-shifting control, and thus safe, economical and comfortable driving is realized.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, and in particular relates to a method for estimating vehicle quality and road gradient considering parameter coupling relationship. Background technique [0002] Real-time estimation of vehicle dynamics model parameters is the basis of vehicle control, and vehicle mass and road gradient are important parameters in vehicle dynamics model. Accurate and real-time estimation of vehicle mass and road gradient can effectively improve vehicle dynamics and economy. On-line adjustment of the shift control strategy according to the vehicle quality can not only make the vehicle run more smoothly during the automatic shift process, but also obtain a more economical shift control strategy. Based on information such as road gradient, speed and acceleration, the vehicle power coefficient can be calculated, thereby estimating the engine power required to overcome air resistance and rolling resistance, t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/076B60W40/13
Inventor 赵敏孙棣华杨凡
Owner CHONGQING UNIV
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