带高低挡电动汽车变速装置的设计与开发

多数电动汽车采用固定速比的1挡减速器,存在电机效率低,续驶里程短等问题.基于此,改用2挡变速传动方案,设计了一种新型高低挡变速电动汽车驱动系统.对传动系统的速比进行了优化设计,2挡传动比分别为6.7和10.5;将高低挡位变速器与驱动系统集成于一体.研发了一种体积小、强度高、功能性强且性能稳定的差速器.经实际道路试验,该新型电动汽车能耗降低了6.8％,续驶里程延长了7.2％.     

某轻客驱动桥的有限元模态分析与NVH性能优化

以国内某新型轻客驱动桥的NVH性能为研究对象,根据整车噪声测试结果,结合驱动桥的噪声测量数据,并运用ABAQUS软件进行模态有限元分析。针对主减齿轮啮合噪声和驱动桥的整车共振提出相应改进措施,并进行试验验证。试验结果表明,理论分析计算和改进措施有效,为后期驱动桥的设计和改进提供了参考。     

电机控制系统主电路及驱动电路的设计

本文中选用的无刷直流电动机的电机本体采用星形连接的三相对称绕组,同时功率器件组成的逆变器为桥式电路。文章主要叙述了控制系统的硬件电路设计过程。以EasyARM2100开发板为核心的控制单元,主电路及驱动单元行了阐述,并对硬件设计也作出了相应的解释。     

Development of Malaysian urban drive cycle using vehicle and engine parameters

Vehicles travelling in actual urban areas are mostly in idle, low or medium speeds, which reflects engine part-load condition. These regularly visited engine conditions, in reality affect the fuel economy during actual driving. Thus, understanding the characteristics of the actual driving conditions will enable many other benefits besides legislation. This paper presents the development of a preliminary Malaysian urban drive cycle with the inclusion of the engine parameters and characteristics, acquired through an actual urban driving on numerous urban roads in Malaysia that represents the actual consumer’s daily driving experience. The actual engine parameters and its characteristics are integrated into the assessment measures in an attempt to formulate representable drive cycle and fuel consumption data. The initial drive cycle is composed of 17 sequences selected from the actual on-the-road conditions to represent the Malaysian urban driving. The average fuel economy of the established Malaysian urban drive cycle was then measured on a test bench using the same engine from the vehicle. The recorded fuel economy with Malaysian urban drive cycle is 8.5% below the actual Malaysian urban driving which is closer estimation to the actual driving compared to the current in-practice NEDC which shows to be 43.1% below the actual Malaysian urban driving. Thus, Malaysian urban drive cycle is better in representing the Malaysian urban driving conditions compared to the NEDC in terms of the average fuel economy measurements.     

Active heave compensation of floating wind turbine installation using a catamaran construction vessel

The application of floating wind turbines is limited by the high cost that increases with the water depth. Offshore installation and maintenance continue to consume a high percentage of the project budget. To improve the installation efficiency of the floating offshore wind turbine, a novel concept is proposed by the SFI MOVE project. Several wind turbine superstructure components are preassembled onshore and carried to the installation site by a catamaran construction vessel. Each assembly can then be installed using only one lift, and the concept is less sensitive to weather conditions. In this paper, a control algorithm of the proposed hydraulic active heave compensator system is developed using singular perturbation theory to cancel the relative motion between the spar top and gripped preassembly bottom. Closed-loop stability is proven, and the simulation results show that the installation efficiency is improved with an increase in the acceptable weather conditions.     

汽车驱动桥总成磨合机机械设计

根据汽车驱动桥总成传动机构空载磨合需要及相关工艺检测要求,结合各类驱动桥总成结构尺寸、转动力矩等相关参数,规划设备整体结构布置,并通过主材选取、各部位结构设计、传动系统设计、液压泵站方案设计、各项配置选型、安全防护设计等一系列工作,完成磨合机的机械设计方案并通过设计评审,保证顺利实现各项功能,满足磨合使用要求。     

汽车十字轴万向节转向机构的运动学设计及优化

通过在Altair/MotionView环境下建立的转向系统和整车虚拟平台,研究了十字轴万向节转向机构的运动学特性.阐述了包括虚拟仿真、系统试验、主观评估的十字轴万向节转向机构面向整车动力学性能和零件开发的系统设计和优化方法,并运用该方法进行了某车型转向机构优化设计.     

液压冲击器新型先导式配流阀的研究

介绍了作者最新研究设计的一种新型先导式配流阀，使用该阀可以实现液压冲击器的压力反馈控制，即通过调节先导阀的调定压力，来控制液压系统的压力，从而达到无级调节液压冲击器冲击能的目的，对新代进行了静态分析和动态计算机仿真研究，为进一步研制该阀提供了理论依据。     

沥青混凝土摊铺机刮板停转故障分析

以VOGELE S1800型摊铺机为例，分析了刮板停转故障的原因，并由此提出了进口摊铺机正常使用中液压系统应注意的几个重要问题。     

由PLC电控系统控制的液压卷耳机

由ＰＬＣ电控系统控制的Ｈ１６０／２５液压卷耳机是在引进英国ＦＢ公司的卷耳机样品的基础上发展的经有手动和半自动两种工作方式。该机的工作原理是将加热的弹簧钢板绕芯轴卷制，从而形成卷耳或包耳。该机是一机多用，它集切头－卷耳－成型于一体，可卷制平耳，垂耳及包耳。