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51.
排放试验用底盘测功机的设定研究 总被引:4,自引:1,他引:4
根据汽车在道路上和底盘测功机上运行时的受力分析结果,提出了底盘测功机设定原则和负荷设定方法,举例分析了底盘测功机上各种负荷设定方法,并综述欧、日、美排放法规有关底盘测功机的一些规定。 相似文献
52.
T. H. Hwang K. Park S. -J. Heo S. H. Lee J. C. Lee 《International Journal of Automotive Technology》2008,9(1):17-27
The performance of most electronic chassis control systems in the past has been optimized individually. Recently, a great
research effort has been dedicated to the integration of chassis control systems in an effort to improve the vehicle performance.
This involves orchestration of individual control modules so that they can jointly contribute to the enhancement of their
control effect. In this research, two integrated control logics for AFS (Active Front Steering) and ESP (Electronic Stability
Program) have been developed. Of the two logics, one uses a supervisor that rules over the individual modules. The other logic
uses a CL (Characteristic Locus) method, which is a frequency-domain multivariable control technique. The two logics have
been tested under various driving conditions to investigate their control effects. The results indicate that the proposed
integrated control logics can yield vehicle performance that is superior to that of the individual control modules without
any integration scheme. 相似文献
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底盘装配支撑应用于商用汽车底盘装配与工程机械车辆底盘装配,属于装配线附属工装设施.底盘装配支撑结构的适用性、可靠性、耐久性关系到底盘装配线的运行安全与运行效率.文章结合公司在建底盘装配线工艺验证问题整改,对底盘装配支撑结构进行优化,开发出一种适用于驱动桥桥包支撑的实用新型支撑结构. 相似文献
56.
Vehicular emission models play a key role in the development of reliable air quality modeling systems. To minimize uncertainties associated with these models, it is essential to match the high-resolution requirements of emission models with up-to-date information. However, these models are usually based on average trip speed, not on environmental parameters like ambient temperature, and vehicle’s motion characteristics, such as speed, acceleration, load and power. This contributes to the degradation of its predictive performance. In this paper, we propose to use the non-parametric Classification and Regression Trees (CART), the Boosting Multivariate Adaptive Regression Splines (BMARS) algorithm and a combination of them in hybrid models to improve the accuracy of vehicular emission prediction using on-board measurements and the chassis dynamometer testing. The experimental comparison between the proposed CART-BMARS hybrid model with the BMARS and artificial neural networks (ANNs) algorithms demonstrates its effectiveness and efficiency in estimating vehicular emissions. 相似文献
57.
Jing Zhao Xinbo Ma Zhengchao Xie 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2017,55(1):72-103
This paper proposes a novel integrated controller with three-layer hierarchical structure to coordinate the interactions among active suspension system (ASS), active front steering (AFS) and direct yaw moment control (DYC). First of all, a 14-degree-of-freedom nonlinear vehicle dynamic model is constructed. Then, an upper layer is designed to calculate the total corrected moment for ASS and intermediate layer based on linear moment distribution. By considering the working regions of the AFS and DYC, the intermediate layer is functionalised to determine the trigger signal for the lower layer with corresponding weights. The lower layer is utilised to separately trace the desired value of each local controller and achieve the local control objectives of each subsystem. Simulation results show that the proposed three-layer hierarchical structure is effective in handling the working region of the AFS and DYC, while the quasi-experimental result shows that the proposed integrated controller is able to improve the lateral and vertical dynamics of the vehicle effectively as compared with a conventional electronic stability controller. 相似文献
58.
基于UG的客车底盘三维参数化总布置设计系统 总被引:7,自引:1,他引:7
介绍了在建立零部件图形库,底盘参数数据库,底盘设计标准库的基础上,通过UG软件进行二次开发建立的集成于UG环境下的客车底盘参数化三维总布置设计系统,该系统的研制在一定程度上实现了客车底盘的虚拟设计与虚拟开发,详细阐述了系统开发的基本原理和主要方法。 相似文献
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汽车线控驱动技术的发展 总被引:6,自引:0,他引:6
电子技术和控制理论的飞速发展为进一步改善车辆动力学特性及提高主动安全性提供了有效途径,如已经广泛应用的各种底盘控制技术。综述了汽车线控驱动技术的发展现状和相关技术,着重介绍了线控转向、线控制动、线控油门等系统的结构组成、工作原理和性能特点,并讨论了线控驱动的集成化和相关技术要求。 相似文献