【作者】 伊永亮；

【导师】 刘涛；

【作者基本信息】 哈尔滨工业大学 ， 车辆工程， 2010， 硕士

【摘要】 全球化的市场竞争、能源匮乏、环境污染等问题促使人们考虑车辆的燃油经济性问题。作为混合动力技术的一个重要分支,静液传动混合动力车辆也逐渐引起了各国政府、研究机构及汽车制造商的高度重视。二次调节静液传动技术是通过改变液压泵/马达的斜盘倾角,从而改变排量来适应负载的变化。液压储能系统功率密度大,全充和全放能力强,满足短时间车辆制动时的能量转换和储存要求。除此之外,静液传动技术还具有无级变速的精细速度调节、容易实现正反转、操控性强以及可靠性高等优点。因此,将二次调节静液传动技术应用于车辆传动系统中,对研究车辆的能量回收,减少环境污染以及提高车辆的整体性能具有重要意义。本文以二次调节静液传动技术应用于车辆传动系统的驱动与制动控制系统的性能研究为主要内容,对二次调节静液传动车辆控制技术进行了较为全面的研究。在查阅大量国内外有关文献的基础上,本文概述了国内外静液传动混合动力车辆的发展概况,按照能量再生系统与发动机的不同配置形式,将液压混合动力车辆分为四种形式,并对静液传动混合动力车辆的特点做了相关介绍。阐述二次调节静液传动车辆的工作原理,以及几种典型的工作模式。根据控制系统的需求,分别建立了电液伺服阀、液压泵/马达和液压泵-蓄能器组合的动态特性的数学模型,进而建立了液压泵/马达回路控制的数学模型。根据驱动和制动系统的特点设计了转矩控制方式和转速控制方式,建立了相应的数学模型,并对其稳定性进行了分析。根据PID控制和离散滑模变结构控制的特点设计了相应的驱动和制动系统控制器。最后,对本文相关的研究内容进行仿真研究,并对仿真结果进行分析。结果表明,转矩控制方式更适合于驱动和制动系统,而采用离散滑模变结构控制理论设计的驱动和制动系统的鲁棒控制器比传统的PID控制更有效地抑制了系统参数大范围摄动、强非线性以及外界干扰的影响,提高车辆的控制性能。更多还原

【Abstract】 Global competition, energy shortages, environmental pollution problems have prompted people to consider fuel economy issues. Hybrid technology as an important branch, hydrostatic transmission hybrid vehicles have gradually led governments, research institutions and auto makers are highly valued.Hydrostatic transmission with secondary regulation is a new kind of transmission technology, which changes the swash angle of hydraulic pump/motor to adapt to the load change. Hydraulic accumulator has the advantage of higher power density and the ability to accept the high rates and high frequencies of charging and discharging, both of which are favorable for energy conversion and storage requirements during vehicle braking. In addition, hydrostatic transmission with secondary regulation has the advantages of continuously variable speed adjustment, easy to achieve positive inversion and prevent overload of engine and so on. Therefore hydraulic hybrid technology is well suited for luxury passenger cars, sport utility vehicles, light duty trucks and heavy-duty trucks. It is undoubtedly important to apply secondary regulation to developing and exploring new hybrid vehicles to save energy and protect environment. Based on the application of secondary regulation technology in hybrid vehicles, series hybrid vehicles of hydrostatic transmission with secondary regulation are studied and analyzed in depth and breadth in this article.After consulting a lot of related literatures and reference materials at home and abroad, this paper summarizes the development of hydrostatic transmission hybrid vehicles. Energy regeneration system and the engine in accordance with the different configurations, the hydraulic hybrid vehicles are divided into four forms, and the hydrostatic transmission characteristics of hybrid vehicles made related presentations.After studying the operation principle of hydrostatic transmission hybrid vehicles, and the typical work patterns. According to the control system requirements, are established electro-hydraulic servo valve, hydraulic pump / motors and hydraulic pump - energy storage combinations of dynamic performance of the mathematical model, and establish a hydraulic pump / motor loop control model.According to the characteristics of driving and braking system designed torque control mode and speed control mode, established the corresponding mathematical model and analyzed its stability. Under PID control and discrete characteristics of sliding mode control design the corresponding drive and brake system controller.Finally, research related to the contents of this simulation, and analysis of simulation results. The experimental results shown that torque control method is well suit for hydrostatic transmission hybrid system, discrete sliding mode robust controller is better than PID controller and hydraulic regenerative braking strategy and energy control strategy are quite effective.更多还原