A method for generating a new type of rollover early warning indicator based on derivative iterative prediction
A technology of early warning indicators and rollovers, which is applied to the driver's input parameters, control devices, vehicle components, etc., can solve the problems of poor reliability and stability of the anti-rollover system, inaccurate rollover warning indicators, etc. The ability to roll over, the effect of ensuring reliability and stability
Active Publication Date: 2022-08-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The rollover early warning index can further consider the impact of future time prediction on rollover, and is more accurate than the traditional rollover early warning index, which solves the problem that the rollover early warning index mentioned above is not accurate enough and cannot predict the future time. The problem of poor reliability and stability of the rollover system
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[0074] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.
[0075] refer to figure 1 As shown, a method for generating a new type of rollover early warning indicator based on derivative iterative prediction of the present invention includes the following steps:
[0076] (1) Establish a four-degree-of-freedom dynamic model of the vehicle, including: longitudinal motion, lateral motion, yaw motion, and roll motion;
[0077] refer to Figure 2a , Figure 2b As shown, the four-degree-of-freedom dynamic model of the vehicle contains degrees of freedom: roll motion rotating around the roll axis x-axis, longitudinal motion along the x-axis horizontal displacement, yaw motion rotating around the z-axis, and y-axis along the y-axis The lateral movement o...
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The invention discloses a method for generating a new type of rollover early warning indicator based on derivative iterative prediction. The steps are as follows: establishing a vehicle four-degree-of-freedom dynamic model, including: longitudinal motion, lateral motion, yaw motion, and roll motion; The established vehicle four-degree-of-freedom dynamic model, and considering the influence of unsprung mass and inertial force on vehicle rollover, the force and moment balance analysis of sprung mass and unsprung mass were carried out respectively, and the traditional rollover warning index LTR was analyzed. Improvement; combined with the above improved rollover warning indicator LTR * , using the derivative iterative prediction method to generate a new type of rollover early warning indicator PTLTR. The invention analyzes the rollover early warning index, considers the influence of the unsprung mass and inertial force of the whole vehicle on the rollover, improves the lateral load transfer rate, and proposes a new rollover early warning index based on the derivative iteration theory.
Description
technical field [0001] The invention belongs to the technical field of automobile safety, and in particular relates to a method for generating a new type of rollover warning index based on derivative iterative prediction. Background technique [0002] The appearance of automobiles has brought great changes to human life. In recent years, with the rapid development of social economy, automobiles have been widely popularized and used as a means of transportation, and have become a necessity in people's lives. However, due to the rapid growth of the number of cars, the traffic flow on the road is increasing day by day, and a series of safety accidents have also occurred, which has become a major problem in modern society. [0003] Some vehicles, such as SUVs, passenger cars, trucks, etc., have a high center of mass, large mass, and low suspension stiffness, which are prone to rollover accidents. Although the proportion of rollover accidents is low, the fatality rate is very h...
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IPC IPC(8): B60W30/04B60W40/10
CPCB60W30/04B60W40/10B60W2030/043B60W2520/10B60W2520/105B60W2520/12B60W2520/125B60W2540/18
Inventor 曹铭纯王春燕刘利锋王展赵万忠刘晓强秦亚娟张自宇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS