【摘要】：在國內(nèi)市場(chǎng),隨著社會(huì)經(jīng)濟(jì)水平的提高,車輛的操縱穩(wěn)定性、駕駛安全性逐漸被消費(fèi)者所側(cè)重,而四驅(qū)汽車由于其獨(dú)特的驅(qū)動(dòng)方式所具有的駕駛潛能也越發(fā)受到廣大消費(fèi)者的追捧,相比于傳統(tǒng)兩輪驅(qū)動(dòng)模式,四驅(qū)汽車則能夠充分發(fā)揮整車動(dòng)力性,充分利用路面所能提供給車輛的附著極限。本文以某款適時(shí)四驅(qū)車輛為例,對(duì)其進(jìn)行了整車動(dòng)力學(xué)分析,重點(diǎn)研究了轉(zhuǎn)向工況下扭矩分配對(duì)整車性能狀態(tài)的影響,并通過設(shè)計(jì)扭矩分配控制策略合理有效的識(shí)別和追蹤了駕駛員轉(zhuǎn)向意圖,提高了整車操縱穩(wěn)定性。本文的主要研究?jī)?nèi)容如下:1)本文首先研究分析了國內(nèi)外對(duì)于四驅(qū)技術(shù)的研究現(xiàn)狀及發(fā)展?fàn)顩r,并針對(duì)分時(shí)四驅(qū)、適時(shí)四驅(qū)、全時(shí)四驅(qū)的結(jié)構(gòu)及性能特點(diǎn)進(jìn)行了深入分析,與此同時(shí)展開了整車動(dòng)力學(xué)分析,并基于MATLAB/SIMULINK軟件搭建了七自由度整車模型,模型包括整車動(dòng)力學(xué)部分、發(fā)動(dòng)機(jī)部分、傳動(dòng)系統(tǒng)部分以及輪胎附著模塊、輔助計(jì)算模塊。為便于針對(duì)性分析,采用分塊式建模方法,為下一步進(jìn)行整車性能分析奠定了基礎(chǔ)。2)基于某適時(shí)四驅(qū)汽車,對(duì)其動(dòng)力性進(jìn)行了分析,并研究了不同路面、不同車速和不同轉(zhuǎn)向工況下軸間扭矩分配和輪間扭矩分配對(duì)汽車質(zhì)心側(cè)偏角及橫擺角速度的影響規(guī)律。以此為基礎(chǔ)提出了基于扭矩分配控制的分層協(xié)調(diào)控制系統(tǒng),以線性二自由度半車模型為參考對(duì)象,設(shè)計(jì)了以扭矩分配系數(shù)為輸出對(duì)象的自適應(yīng)PID控制器結(jié)構(gòu)。3)對(duì)設(shè)計(jì)的控制系統(tǒng)及控制器開展了典型工況下的整車性能仿真驗(yàn)證,同時(shí)利用VG440陀螺儀及轉(zhuǎn)角傳感器進(jìn)行了實(shí)車試驗(yàn),并基于采集所得數(shù)據(jù)及NI PXI設(shè)備構(gòu)建了扭矩分配硬件在環(huán)試驗(yàn)平臺(tái),對(duì)整車模型及控制系統(tǒng)結(jié)構(gòu)的有效性進(jìn)行了試驗(yàn)驗(yàn)證。結(jié)果顯示:該控制策略能較好的追隨駕駛員的轉(zhuǎn)向意圖,車輛行駛穩(wěn)定性得到提升,試驗(yàn)結(jié)果也驗(yàn)證了控制系統(tǒng)的有效性。
[Abstract]:In the domestic market, with the improvement of social and economic level, the stability of vehicle handling and driving safety are gradually being emphasized by consumers. Because of their unique driving potential, four-drive cars are increasingly sought after by consumers. Compared with the traditional two-wheel drive mode, four-drive cars can give full play to the power of the whole vehicle. Make full use of the adhesion limit that the road can provide to the vehicle. In this paper, taking a timely four-drive vehicle as an example, the dynamic analysis of the vehicle is carried out, and the influence of torque distribution on the performance of the vehicle under steering condition is studied. The torque distribution control strategy is designed to identify and track the steering intention of the driver reasonably and effectively, and improve the handling stability of the whole vehicle. The main research contents of this paper are as follows: firstly, this paper studies and analyzes the present situation and development of the four-drive technology at home and abroad, and analyzes the structure and performance characteristics of time-sharing four-drive, timely four-drive and full-time four-drive. At the same time, the dynamic analysis of the whole vehicle is carried out, and based on the MATLAB/SIMULINK software, the vehicle model with seven degrees of freedom is built. The model includes the whole vehicle dynamics part, the engine part, the transmission system part and the tire attachment module, and the auxiliary calculation module. In order to facilitate the specific analysis, the block modeling method is used to lay the foundation for the next step of the whole vehicle performance analysis. 2) based on a timely four-drive vehicle, the dynamic performance of the vehicle is analyzed, and the different road surfaces are studied. The effect of torque distribution between shafts and wheel on the deflection angle and yaw angular velocity of vehicle mass center under different speed and different steering conditions. Based on this, a hierarchical coordinated control system based on torque distribution control is proposed. The linear two-degree-of-freedom half-car model is taken as the reference object. An adaptive PID controller with torque distribution coefficient as output object is designed. 3) the designed control system and controller are simulated and verified under typical operating conditions. At the same time, the VG440 gyroscope and angle sensor are used to carry out the actual vehicle test, and based on the collected data and NI PXI equipment, the torque distribution hardware in loop test platform is constructed, and the validity of the whole vehicle model and the control system structure is tested and verified. The results show that the control strategy can follow the steering intention of the driver and improve the vehicle driving stability. The experimental results also verify the effectiveness of the control system.
【學(xué)位授予單位】：安徽農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U467

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王鈺明;王其東;陳黎卿;;面向多目標(biāo)滿意度的分動(dòng)器設(shè)計(jì)方案優(yōu)選[J];機(jī)械設(shè)計(jì);2015年12期

2 王亮;鄭泉;陳黎卿;胡芳;;面向多目標(biāo)滿意度的分動(dòng)器與整車匹配優(yōu)化[J];機(jī)械設(shè)計(jì);2015年07期

3 林程;徐志峰;周逢軍;曹萬科;;分布式驅(qū)動(dòng)電動(dòng)汽車穩(wěn)定性分層控制策略研究[J];北京理工大學(xué)學(xué)報(bào);2015年05期

4 劉樹成;魏巍;楊陽;閆清東;;發(fā)動(dòng)機(jī)動(dòng)態(tài)特性組合神經(jīng)網(wǎng)絡(luò)建模新方法[J];北京理工大學(xué)學(xué)報(bào);2014年11期

5 張學(xué)玲;賈巨民;柴樹峰;;越野車雙聯(lián)非圓行星齒輪差速器的設(shè)計(jì)[J];機(jī)械傳動(dòng);2014年11期

6 余勝威;曹中清;;基于人群搜索算法的PID控制器參數(shù)優(yōu)化[J];計(jì)算機(jī)仿真;2014年09期

7 Pan SONG;Chang-fu ZONG;Masayoshi TOMIZUKA;;基于終端滑�？刂频乃妮啰�(dú)立驅(qū)動(dòng)汽車轉(zhuǎn)矩分配方法(英文)[J];Journal of Zhejiang University-Science A(Applied Physics & Engineering);2014年09期

8 郭孔輝;楊杰;;大側(cè)傾角下UniTire穩(wěn)態(tài)側(cè)傾側(cè)偏工況側(cè)向力模型[J];機(jī)械工程學(xué)報(bào);2014年08期

9 許洪斌;鄢敏麗;王偉;黃德見;黃家勇;楊長輝;;基于拓?fù)鋬?yōu)化方法的分動(dòng)器箱體輕量化設(shè)計(jì)[J];機(jī)械傳動(dòng);2014年04期

10 張聰;王振臣;程菊;劉建旺;;4WIS-4WID車輛橫擺穩(wěn)定性AFS+ARS+DYC滑�？刂芠J];汽車工程;2014年03期

相關(guān)碩士學(xué)位論文 前2條

1 何錚斌;轉(zhuǎn)向工況下四輪驅(qū)動(dòng)汽車扭矩分配控制研究[D];重慶大學(xué);2012年

2 呂紅明;橫擺率跟蹤控制的四輪轉(zhuǎn)向汽車操縱穩(wěn)定性[D];東南大學(xué);2004年

，

本文編號(hào)：2172708