乘用车通风盖板断面设计要求

乘用车通风盖板在整车通风、排水、美观上起着重要作用,因其与前风挡玻璃、翼子板、发动机舱零部件相互配合,结构设计非常复杂,这就需要研发工程师要充分考虑通风盖板开发过程中的设计要求、法规要求、结构限制以及工艺要求和材料选择等因素,本文从通风盖板断面设计入手,重点介绍了通风盖板与对手件配合的断面设计要求。     

汽车电控系统的电磁干扰故障分析及检修

论述了由点火系统、发电机及电动机、继电器、汽车音响设备等汽车内部电磁干扰源产生的电磁干扰机理。通过分析指出,电磁干扰对汽车电控系统中传感器频率信号、微电压信号和执行器线路的占空比信号会产生较大影响。结合实例,介绍了汽车电控系统的电磁干扰故障检修方法。     

纯电动汽车电磁兼容分析与电磁干扰抑制

基于电磁兼容理论和电动汽车的结构,对纯电动汽车进行电磁兼容分析;提出纯电动汽车上抑制电磁干扰的具体措施,试验证明这些方法和措施是行之有效的。     

高铁四线并行不同制式轨道电路的应用方案

通过耦合干扰试验及数据分析,提出不同制式轨道电路区段四线并行邻线干扰的解决方案,并将方案实际运用于高速铁路中进行验证,提出防止高速铁路不同制式轨道区段四线并行邻线干扰的相关措施.     

A line impedance stabilization network for pulse current injection北大核心CSCD

［Objective］Aiming at the deficiency of the existing line impedance stability network (LISN) in the electromagnetic pulse protection capability, a LISN suitable for the pulse current injection (PCI) test of electrical and electronic equipment is proposed. ［Methods］Aiming at the characteristics of high peak value and fast rise of the pulse current in PCI testing, the circuit structure and physical structure of the LISN are improved on the existing basis through PSpice time-domain and frequency-domain simulation combined with engineering design requirements, thereby giving it good nanosecond pulse protection performance and impedance stability at the same time. Pulse current protection performance test and impedance curve test experiments are then designed and carried out.［Results］The experimental results show that the improved LISN can attenuate the injected pulse current by 60 times, while the error of its impedance curve is less than 5% compared with the Type 5 µH LISN in GJB 151B-2013. ［Conclusions］The proposed LISN has good impedance stability and decoupling ability, and can be used in the PCI testing of electrical and electronic equipment in order to protect the power supply and improve the repeatability of testing. © 2023 Chinese Journal of Ship Research. All rights reserved.     

船舶轴舵系安装设备的虚拟设计与装配

以船舶轴舵系安装设备为例,使用SolidWorks软件设计建立轴舵系安装设备的三维实体模型,研究轴舵系安装设备的安装过程和安装工艺,并对轴舵系安装设备的干涉检查及装配约束进行仿真分析,以验证轴舵系安装设备在设计及安装工艺方面的准确性和适用性,对提高造船设备产品质量、降低产品设计误差、缩短生产周期、优化装配流程具有重要意义。