【摘要】：隨著汽車保有量的不斷增加,汽車交通事故頻發(fā),這給人們帶來了大量的經(jīng)濟財產損失和嚴重的人身安全威脅,導致汽車發(fā)生交通事故的原因有很多,其中“爆胎”是重要原因之一,而且爆胎往往能引發(fā)嚴重的交通事故。另外現(xiàn)代轎車多數(shù)采用前置前驅前轉向的布置形式,一旦發(fā)生轉向輪的爆胎,車輛的驅動、轉向和制動性能都會發(fā)生劇烈改變,相對于后輪而言,轉向輪的研究意義更大一些。本文在借鑒國內外相關研究成果的基礎上,以Pacejka89魔術輪胎為基礎,充分考慮了爆胎過程中爆胎持續(xù)時間、輪胎的力學與幾何特性的變化、輪胎胎壓以及各輪胎載荷的轉移等因素的影響,建模過程中通過對滾動阻力系數(shù)、徑向剛度、側偏剛度、縱向滑移剛度等幾個重要變量進行適當?shù)男拚?來實現(xiàn)爆胎后輪胎特性的改變,從而得到了更加準確的爆胎模型。本文在假設駕駛員生理和心理狀態(tài)良好的前提下,研究爆胎后駕駛員的典型反應(即緊急轉向與制動),建立爆胎后轉向操縱模型和制動模型,使用Matlab/Simulink軟件對模型進行了表達,并整合駕駛員模型與修正后的爆胎模型,對12種不同工況下的爆胎汽車進行了仿真,分析了爆胎后駕駛員不同的操作方法對汽車運行軌跡和動力學特性的影響,積累了一些數(shù)據(jù),總結了一些經(jīng)驗,為車輛爆胎后駕駛員的應急處置提供幫助,也為爆胎后車輛穩(wěn)定控制系統(tǒng)的研發(fā)提供一定基礎。
[Abstract]:With the continuous increase of vehicle ownership, automobile traffic accidents occur frequently, which brings people a large number of economic and property losses and serious personal safety threats. There are many reasons leading to vehicle traffic accidents. Tire burst is one of the important reasons, and it can cause serious traffic accidents. In addition, most modern cars use the front steering arrangement. Once the tire burst of the steering wheel, the driving, steering and braking performance of the vehicle will change dramatically. Compared with the rear wheel, the research significance of the steering wheel is more significant. In this paper, based on the domestic and foreign related research results, based on Pacejka89 Magic Tire, the change of tire duration, tire mechanical and geometric properties during the process of tire explosion is considered. In the process of modeling, some important variables such as rolling resistance coefficient, radial stiffness, lateral deflection stiffness, longitudinal slip stiffness, and so on, are modified properly in the process of modeling, such as tire pressure and tire load transfer. In order to realize the change of tire characteristics after tire burst, a more accurate tire burst model is obtained. Based on the assumption that the driver is in good physical and psychological condition, this paper studies the typical reaction of the driver after the tire burst (i.e. emergency steering and braking), and establishes the steering control model and braking model after the tire burst. Matlab/Simulink software is used to express the model, and the driver model and modified tire model are integrated to simulate 12 kinds of tire exploding vehicles under different working conditions. This paper analyzes the influence of the driver's different operation methods on the running track and dynamic characteristics of the vehicle after the tire burst, accumulates some data, summarizes some experiences, and provides help for the driver's emergency disposal after the tire burst. It also provides a basis for the research and development of vehicle stability control system after tire burst.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：U463.341

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