Simulation method for minimum turning radius of four-wheel steering belt differential vehicle

A technology of turning radius and four-wheel steering, applied in the fields of instrumentation, geometric CAD, electrical digital data processing, etc., can solve the problems of no unified designer, use, and simulation level work without relevant research.

CN113722847APending Publication Date: 2021-11-30的卢技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-11-30

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Abstract

The invention provides a simulation method for the minimum turning radius of a four-wheel steering belt differential vehicle. The method comprises the steps that: a vehicle dynamics model is established in a steering system in Carsim according to existing parameters, and the accuracy of necessary parameters is ensured; a Python interface in Carsim is defined, the Python interface comprises a path configuration file and input variables and output variables of a model, and an observation variable of a tire mark center of a wheel on the outermost side is established; and by writing a corresponding py control file, minimum turning radius simulation meeting requirements on a vehicle model is performed in Carsim. The Carsim vehicle dynamics model, the four-wheel steering, the torque control strategy and the Python interface control program are effectively connected together, and simulation of the four-wheel steering and the control strategy is effectively achieved.
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Description

Technical field

[0001] The invention belongs to the field of automobile technology, and more particularly to a simulation method of a minimum turn radius of four-wheel steering belt differential vehicles. Background technique

[0002] The minimum turn radius characterizes the ability of the car to be bent through a narrow curvature or bypassing an obscuring obstacle. The automotive manipulation stability directly related to the turn radius is directly related to the safety of the car, which has long been one of the main performances of modern cars. The minimum turn radius will be considered as a very important indicator in the early stage of automobile research and development. For traditional front wheel or uniaxial steering engines, the minimum turn radius can be obtained by theoretical formula, but for other models, such as high levels Some four-wheel steering on the vehicle even include the differential speed. There is no unified formula for the design personnel in the existi...

Examples

Embodiment Construction

[0030] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

[0031] MINIMUMTURN RADIUS OF CAR is a rotary disk to the limit position, and the vehicle is turned from the center plane of the outer steering wheel (lead straight) central plane on the support plane at the lowest stabilizing vehicle speed. That is, the radius of the round of the round of the round, such as figure 1 Show. It is largely characterized by the ability of the car to be bent through a narrow curvature or bypassing an obscuring obstacle.

[0032] In the traditional vehicle development process, generally in the design initial stage will be based on market demand and total arrangement, the theoretical calculation of the minimum turn radius, because most of them are two-wheel drive models, generally adopted the following calculation formula:

[0033] Calculate with the steering wheel outer wheel center track:

[0034]

[0035] Or calculate...