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Vehicle speed prediction method and device

A technology of vehicle speed and predicted value, applied in the field of measurement, which can solve the problems of low versatility and large error

Active Publication Date: 2019-11-22
BYD CO LTD
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Problems solved by technology

[0003] The purpose of this disclosure is to provide a vehicle speed prediction method and device for solving the problems of low versatility and large errors of traditional speed measurement methods

Method used

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  • Vehicle speed prediction method and device
  • Vehicle speed prediction method and device

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Embodiment Construction

[0087] The specific implementation manners of the present disclosure will be described in detail below in conjunction with the accompanying drawings, examples of which are shown in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0088] Before describing the vehicle speed prediction method and device provided in the present disclosure, the application scenarios involved in the various embodiments of the present disclosure are firstly introduced. The application scenario can be any kind of vehicle, such as a car. The car is not limited to trad...

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Abstract

The invention relates to a vehicle speed prediction method and device. The method comprises the steps of obtaining a wheel speed sample set and a longitudinal accelerated speed of N wheels of a vehicle in a current period; building a dynamic prediction model according to the wheel speed sample set and the longitudinal accelerated speed of the current period, and correcting the dynamic prediction model according to error correction parameters obtained in the last period; obtaining a state space vector according to a preset state space model and the wheel speed sample set; utilizing the corrected dynamic prediction model to obtain the vehicle speed prediction value of the current period according to the state space vector and the longitudinal accelerated speed of the current period; obtaining an error sample set according to vehicle speed prediction values of the current period and M periods before, and reference wheel speed measured values of the current period and M periods; obtainingerror correction parameters used for the next period according to the error sample set for calculation of the next period. By means of the vehicle speed prediction method and device, the prediction accuracy of the vehicle speed can be improved, and errors are reduced.

Description

technical field [0001] The present disclosure relates to the technical field of measurement, and in particular, to a vehicle speed prediction method and device. Background technique [0002] As cars play more and more important roles in people's daily life, the improvement of all aspects of car performance has become a matter of great concern to everyone, especially the speed of cars in various scenarios such as driving, braking, and sideslip. Prediction, the predicted vehicle speed is a very important state parameter for the realization of automotive electronic control, and the current vehicle speed prediction method generally collects the wheel speeds of the four wheels based on the wheel speed sensors, obtains the acceleration values ​​of the four wheels and estimates the four wheel speeds. The vehicle speed corresponding to the wheel, and then judge whether it is the braking condition or the driving condition according to the wheel acceleration value. According to differ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W40/105
CPCB60W40/105B60W2520/105B60W2520/28B60W2720/10
Inventor 李艳张宏洲吴小珂刘媛郭海
Owner BYD CO LTD
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