【摘要】：動(dòng)力耦合裝置是混聯(lián)式混合動(dòng)力汽車的核心部件，其動(dòng)態(tài)性能直接影響到混合動(dòng)力汽車傳動(dòng)系統(tǒng)的傳動(dòng)性能。由豐田公司研發(fā)生產(chǎn)的混合動(dòng)力汽車——Prius是目前最成功的混合動(dòng)力汽車產(chǎn)品，其動(dòng)力耦合裝置系統(tǒng)THS已經(jīng)申請(qǐng)了專利保護(hù)。我國(guó)要加快混合動(dòng)力汽車的研發(fā)，必須研發(fā)具有自主知識(shí)產(chǎn)權(quán)的動(dòng)力耦合裝置。本文結(jié)合國(guó)家自然科學(xué)基金項(xiàng)目——“多場(chǎng)耦合條件下混合動(dòng)力汽車動(dòng)力耦合器的設(shè)計(jì)理論與方法(51075179)”,對(duì)差速耦合式混合動(dòng)力汽車PSD的驅(qū)動(dòng)機(jī)理、傳動(dòng)齒輪接觸分析、臺(tái)架實(shí)驗(yàn)測(cè)試數(shù)據(jù)降噪處理以及PSD動(dòng)態(tài)特性進(jìn)行了一些研究。 (1)分析了汽車差速器的工作原理，指出了豐田混合動(dòng)力系統(tǒng)THS和PSD具有類似的功能。然后通過Advisor軟件對(duì)差速耦合式混合動(dòng)力汽車PSD的轉(zhuǎn)速和扭矩進(jìn)行仿真分析，指出了其左右半軸齒輪之間具有較大的轉(zhuǎn)速差，并且大轉(zhuǎn)速差一直伴隨于PSD工作的始終。 (2)對(duì)PSD輪系參數(shù)進(jìn)行了重新設(shè)計(jì)，同時(shí)對(duì)PSD傳動(dòng)齒輪進(jìn)行了有限元接觸分析。通過有限元接觸分析，給出了PSD傳動(dòng)齒輪的應(yīng)力變化規(guī)律、應(yīng)力擴(kuò)散規(guī)律以及應(yīng)力分布規(guī)律。 (3)研究了基于小波閾值的信號(hào)降噪處理方法。對(duì)于基函數(shù)的選擇、分解層數(shù)的選擇、閾值的確定以及閾值函數(shù)的確定問題進(jìn)行了討論，在前人研究的基礎(chǔ)上提出了一個(gè)新的閾值函數(shù)，并通過方波信號(hào)、Leleccum信號(hào)驗(yàn)證了提出的閾值函數(shù)具有良好的降噪性能。最后對(duì)PSD臺(tái)架實(shí)驗(yàn)測(cè)試轉(zhuǎn)矩和轉(zhuǎn)速信號(hào)進(jìn)行了降噪處理。 (4)建立了PSD多剛體和柔體聯(lián)合的動(dòng)力學(xué)仿真模型，對(duì)PSD在正常和失效工況的動(dòng)態(tài)特性進(jìn)行了仿真分析，指出PSD連接發(fā)電機(jī)一端的嚙合沖擊較小，連接電動(dòng)機(jī)一端的嚙合沖擊較大，同時(shí)PSD在失效工況下，其行星齒輪轉(zhuǎn)速產(chǎn)生了巨大的波動(dòng)。 本文的研究對(duì)于PSD測(cè)試數(shù)據(jù)降噪處理及動(dòng)態(tài)特性分析提供了參考，具有一定的工程指導(dǎo)意義。
[Abstract]:Power coupling device is the core component of hybrid electric vehicle (HEV). Its dynamic performance directly affects the transmission performance of HEV transmission system. Prius, a hybrid vehicle developed and manufactured by Toyota, is the most successful hybrid vehicle product. Its power coupling device system, THS, has applied for patent protection. In order to speed up the research and development of hybrid electric vehicles, China must develop power coupling devices with independent intellectual property rights. Combined with the National Natural Science Foundation of China "Design Theory and method of Hybrid Electric vehicle Power Coupler under Multi-field Coupling condition (51075179)", the driving mechanism and gear contact analysis of differential coupled hybrid electric vehicle (PSD) are discussed in this paper. The noise reduction of test data and the dynamic characteristics of PSD are studied in this paper. The main contents are as follows: (1) the working principle of automobile differential is analyzed, and the similar functions of Toyota hybrid power system THS and PSD are pointed out. Then the PSD speed and torque of differential coupling hybrid electric vehicle are simulated and analyzed by Advisor software. It is pointed out that there is a great speed difference between the left and right half axle gears, and the large speed difference has always been accompanied by the work of PSD. (2) the parameters of PSD gear train are redesigned and the finite element contact analysis of PSD transmission gear is carried out. Through finite element contact analysis, the law of stress variation, stress diffusion and stress distribution of PSD transmission gear are given. (3) the method of signal denoising based on wavelet threshold is studied. The selection of basis function, the selection of decomposition layer number, the determination of threshold value and the determination of threshold function are discussed. A new threshold function is proposed on the basis of previous studies, and a new threshold function is proposed by means of square wave signal. The Leleccum signal verifies that the proposed threshold function has good noise reduction performance. Finally, the signal of torque and rotational speed measured by PSD bench is processed by noise reduction. (4) the dynamic simulation model of PSD multi-rigid body and flexible body is established. The dynamic characteristics of PSD under normal and failure conditions are simulated and analyzed. It is pointed out that the meshing impact at one end of PSD connected generator is relatively small. The meshing impact at one end of the connecting motor is great, and the planetary gear speed of PSD fluctuates greatly under the failure condition. The research in this paper provides a reference for the noise reduction of PSD test data and the analysis of dynamic characteristics.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：U469.7

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本文編號(hào)：2372979