Method and apparatus for calculating rotational inertia of multi-body dynamic model and vehicle body model

A moment of inertia and model technology, which is applied in calculation, design optimization/simulation, CAD numerical modeling, etc., can solve the problems of reducing the accuracy of multi-body vehicle models and difficult body moment of inertia, shortening modeling time, improving Accuracy, the effect of improving precision

Active Publication Date: 2017-02-22
BAIC MOTOR CORP LTD
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Problems solved by technology

[0003] However, due to the differences in mass distribution and components between the multi-body dynamics model and the physical prototype (prototype car), it is difficult to obtain accurate moment of inertia of the body through experiments, which greatly reduces the accuracy of the multi-body vehicle model.

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  • Method and apparatus for calculating rotational inertia of multi-body dynamic model and vehicle body model
  • Method and apparatus for calculating rotational inertia of multi-body dynamic model and vehicle body model
  • Method and apparatus for calculating rotational inertia of multi-body dynamic model and vehicle body model

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Embodiment Construction

[0029] 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 designate 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 and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] The method and device for calculating the multi-body dynamics model of the vehicle and the moment of inertia of the vehicle body model proposed by the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0031] figure 1 is a flow chart of a method for calculating the moment of inertia of a vehicle body model according to an embodiment of the present invention. Such as figure 1 As shown, the calculation method of the moment of inertia of the body model includes the fo...

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Abstract

The invention discloses a method and an apparatus for calculating rotational inertia of a multi-body dynamic model and a vehicle body model. The method comprises the following steps of obtaining a tire stress state of a vehicle in a static condition to serve as a wheel load of each wheel of the vehicle; obtaining basic parameters of the vehicle; calculating a centroid position of a multi-body complete vehicle model of the vehicle according to the wheel load of each wheel of the vehicle, and calculating complete vehicle rotational inertia of the vehicle according to the basic parameters of the vehicle; and calculating the rotational inertia of the vehicle body model of the vehicle according to the centroid position of the multi-body complete vehicle model of the vehicle and the complete vehicle rotational inertia. According to the method, the rotational inertia of the vehicle body model of the vehicle can be quickly calculated, so that the modeling duration is shortened and the accuracy of the vehicle body model is improved.

Description

technical field [0001] The invention relates to the technical field of automobile simulation, in particular to a multi-body dynamics model of a vehicle and a calculation method and device for moment of inertia of the vehicle body model. Background technique [0002] When building a multi-body dynamics model of a vehicle, the moment of inertia of the vehicle body affects the accuracy of the multi-body dynamics model under steering conditions. [0003] However, due to the differences in mass distribution and components between the multi-body dynamics model and the physical prototype (prototype car), it is difficult to obtain accurate moment of inertia of the body through experiments, which greatly reduces the accuracy of the multi-body vehicle model. . Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. [0005] For this reason, the first object of the present invention is to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20G06F2111/10
Inventor 兰志宇张立玲刘明卓黄黎韩东
Owner BAIC MOTOR CORP LTD
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