【摘要】：隨著能源問(wèn)題、環(huán)境污染問(wèn)題的凸顯,純電動(dòng)和混合動(dòng)力等新能源汽車發(fā)展迅猛,與普通汽車相比電氣部件也越來(lái)越多。這使得新能源汽車電氣部件在溫度、濕度、振動(dòng)、沖擊作用下老化、性能降低、失靈的風(fēng)險(xiǎn)大大提高。因此,新能源汽車電氣部件綜合環(huán)境試驗(yàn)的重要性就更為突出。在掌握隨機(jī)信號(hào)分析、生成以及振動(dòng)臺(tái)隨機(jī)控制的基礎(chǔ)上,通過(guò)需求分析,確定了新能源汽車零部件綜合環(huán)境試驗(yàn)系統(tǒng)研究的總體方案,其中包含振動(dòng)模擬系統(tǒng)開(kāi)發(fā)和新能源汽車零部件綜合環(huán)境試驗(yàn)系統(tǒng)開(kāi)發(fā)兩大主要內(nèi)容。振動(dòng)模擬系統(tǒng)為新能源汽車零部件綜合環(huán)境試驗(yàn)系統(tǒng)提供前期理論研究和試驗(yàn)的支持。本文完成了振動(dòng)模擬系統(tǒng)硬件選型、搭建及調(diào)試,基于LabVIEW開(kāi)發(fā)的上位機(jī)軟件,實(shí)現(xiàn)了振動(dòng)模擬系統(tǒng)的實(shí)時(shí)控制,該系統(tǒng)不僅對(duì)振動(dòng)控制技術(shù)中特定功率譜密度隨機(jī)信號(hào)生產(chǎn)原理、頻譜均衡以及功率譜密度估計(jì)等進(jìn)行深入研究,而且用通用計(jì)算機(jī)和上位機(jī)軟件替代振動(dòng)控制器,實(shí)現(xiàn)振動(dòng)臺(tái)的隨機(jī)控制,降低成本。通過(guò)實(shí)驗(yàn)對(duì)振動(dòng)模擬系統(tǒng)的隨機(jī)控制性能進(jìn)行驗(yàn)證,實(shí)驗(yàn)結(jié)果表明控制精度良好。對(duì)新能源汽車在普通城市公路上以特定車速行駛時(shí),底板位置的振動(dòng)加速度進(jìn)行分析,得出振動(dòng)加速度功率譜密度,并在振動(dòng)模擬系統(tǒng)上進(jìn)行其功率譜密度的復(fù)現(xiàn)實(shí)驗(yàn),其復(fù)現(xiàn)效果良好,為以后研究路面不平激勵(lì)振動(dòng)的綜合環(huán)境試驗(yàn)方法打下基礎(chǔ)。本文還完成了新能源汽車零部件綜合環(huán)境試驗(yàn)系統(tǒng)硬件選型、搭建及調(diào)試,開(kāi)發(fā)的上位機(jī)軟件可實(shí)現(xiàn)數(shù)據(jù)記錄、在線分析以及離線分析等功能,在溫濕振動(dòng)綜合振動(dòng)試驗(yàn)臺(tái)架上進(jìn)行溫度、濕度、正弦振動(dòng)試驗(yàn)和溫度、濕度、隨機(jī)振動(dòng)試驗(yàn),試驗(yàn)結(jié)果驗(yàn)證了所開(kāi)發(fā)的新能源汽車零部件綜合環(huán)境試驗(yàn)系統(tǒng)可實(shí)現(xiàn)系統(tǒng)所需功能,具有良好的穩(wěn)定性和可靠性。
[Abstract]:With the problems of energy and environmental pollution, new energy vehicles, such as pure electric vehicles and hybrid electric vehicles, are developing rapidly, and more electrical components compared with ordinary vehicles. This makes the electrical parts of the new energy vehicle under the temperature, humidity, vibration, impact aging, performance degradation, the risk of failure is greatly increased. Therefore, the importance of comprehensive environmental testing of electrical components of new energy vehicles is more prominent. On the basis of mastering random signal analysis, generation and random control of vibration table, through demand analysis, the overall scheme of research on integrated environmental test system of new energy automobile parts is determined. It includes two main contents: the development of vibration simulation system and the development of integrated environmental test system of new energy automobile parts. The vibration simulation system provides early theoretical research and experimental support for the integrated environmental test system of new energy automobile parts. In this paper, the hardware selection, setting up and debugging of the vibration simulation system are completed. The host computer software based on LabVIEW is developed to realize the real-time control of the vibration simulation system. The system not only deeply studies the principle of random signal production, spectrum equalization and power spectral density estimation in vibration control technology, but also replaces the vibration controller with general computer and upper computer software. The random control of vibration table is realized and the cost is reduced. The stochastic control performance of the vibration simulation system is verified by experiments, and the experimental results show that the control accuracy is good. This paper analyzes the vibration acceleration of the bottom plate of a new energy vehicle at a specific speed on a common urban highway, and obtains the power spectral density of the vibration acceleration, and carries out a repetition experiment of the power spectrum density on the vibration simulation system. The reappearance effect is good, which lays a foundation for the future research on the comprehensive environmental test method of the road surface vibration caused by uneven excitation. In this paper, the hardware selection, setting up and debugging of the integrated environment test system for new energy automobile parts are also completed. The upper computer software developed can realize the functions of data recording, on-line analysis and off-line analysis, etc. Temperature, humidity, sinusoidal vibration test and temperature, humidity, random vibration test were carried out on the temperature and humidity vibration test bench. The experimental results show that the developed integrated environmental test system of new energy automobile parts can achieve the required functions and has good stability and reliability.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U469.7;U467.3

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