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It is of increasing importance to design and implement vehicle networks for transferring information between electrical control units on Hybrid Electrical Vehicle (HEV). This paper presents a scheme of using Controller Area Network (CAN) technology to realize communication and datasharing between the electrical units on the HEV. The principle and communication protocol of Electrical Control Units (ECU) CAN node are introduced. By considering different sensitivity of the devices to the latency of data transportation, a new design procedure is proposed for the purpose of simplifying network codes and wiring harness, reducing assembly space and weight, improving assembly efficiency, and enhancing fault-diagnose in auto networks. 相似文献
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The general configuration of CEV1 electric vehicle's electrical system and the design scheme of its control sequence are presented, which are modularized by using VMU as master control unit, PMU as power management unit, BMU as battery management unit. It is a rather advanced and practical general design scheme of electric vehicle, because the division of its module function is definite, which is advantage for research, manufacture and maintenance. 相似文献
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WANG Hongxin CHENG Shukang WEN Xishan FU Duan 《武汉大学学报:自然科学英文版》2006,11(2):389-393
This paper deals with the experimental study on the correlation between partial discharge (PD) characteristic parameters and corresponding aging degree of insulation in the course of the aging within eros,s-linked polyethylene (XLPE) insulation. The aging tests were performed on a section of 10 kV transmission cable by means of water needle method. The PD macroscopic characteristic parameters were found to be significantly dependent on the corresponding aging degree of insulation in the course of aging of XLPE, and different kind of aging stage has different characteristics. Beside, there are similar regularity but different PD amplitude in the course of aging of XI.PE insulation in different electrolyte, and their insulation life is different. Therefore, according to the chan ging regularity of the PD macroscopic characteristic parame ters within XLPE insulation judging the aging degree of XLPE insulation will be an effective method. 相似文献
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MAC protocol of ControlNet uses Virtual Token Passing (VTP) to solve the medium access contention, to assure the deterministic and repeatability of message transmission. This paper presents the basic method that VTP uses to transmit real-time I/O message, explicit message and maintenance message in scheduled part, unscheduled part and guardband part respectively. On the basis of analyzing the factors of message transmission delay, the maximum message transmission delay in scheduled part is studied, and the result shows it can be determined, so the deterministic and repeatability of message transmission in ControlNet is validated. 相似文献
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This paper proposed a design of the drivetmin system of an electric bus with ultraeapacitor (UC) as the only on-board power source. The system includes three main parts, namely, UC bank, motor and the converter, vehicle management unit (VMU). Analyses results in detail on the funetional design and ex-periments on work bench of each part were also presented, which validated the reliability of the system. Furthermore, driving results in field of the bus verified the feasibility of the design of the drivetrain sys-tem. The bus has very good dynamic performanees and shows a promising applieations prospeet in the short and medium route buses system. 相似文献
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Shundong Bi Romain Amiot Claire Peyre de Fabrègues Michael Pittman Matthew C.Lamanna Yilun Yu Congyu Yu Tzuruei Yang Shukang Zhang Qi Zhao Xing Xu 《科学通报(英文版)》2021,(9):947-954
Recent studies demonstrate that many avialan features evolved incrementally prior to the origin of the group,but the presence of some of these features,such as ... 相似文献
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针对传统的车辆检测技术检测速度慢和精度低的问题,提出了一种融合注意力的自适应金字塔网络的交通目标检测算法(fusion attentiont adaptive pyramid network,FAAP-Net),可以显著降低交通事故的发生率。为了降低计算复杂度,设计了一种轻量级的互补池化结构(CPS),该结构在宽度和高度上采用了两组不同的池化组合,在保持高精度的同时,显著降低了网络的浮点运算数(GFLOPs)和参数量。为了解决智能交通系统特征图生成过程中的信息损失问题,通过将自适应注意力模块(AAM)和特征增强模块(FEM)引入自适应融合特征金字塔网络(AF-FPN),以融入车辆检测的形状特征。针对车辆细节特征表征弱的问题,引入了一种按通道维度分组的注意力(SA)机制,以增强主干网络对不同车辆检测细节特征的关注,有效提取车辆细节的显著特征。在BDD100K数据集上的实验结果表明,FAAP-Net算法相比于传统算法,平均精度从30.3%提升到43.7%。 相似文献
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本文推导了纱线络卷到筒子两端时稳定性条件的表达式,并以目前两种典型的导纱规律为例,通过实际计算表明,筒子在卷绕到中等偏小的卷装尺寸时,绕到两端的纱圈已经开始滑移,其中圆锥形筒子小端的不稳定现象尤甚。本文得到的稳定性条件表达式及有关结论弥补了专著的不足,对于槽筒沟槽的设计有一定的指导意义。 相似文献
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