A practical and effective approach to active suspension control

A new approach to the control of Automotive Active Suspensions driven by electrohydraulic actuators is presented. Many studies on Active Suspensions focused on implementing a desired force between sprung and unsprung masses. It is shown why the introduction of this controllable force is difficult to achieve. A novel reformulation of the Active Suspension problem, based on prescribing a given displacement between the sprung and unsprung masses, is introduced and the advantages of this approach are discussed. As a result of the reformulation, the Active Suspension problem is transformed from previously examined 'force-tracking' problems to a 'displacement-tracking' problem. Once the reformulation is accomplished, the ability for a well designed servo-control methodology to achieve the desired tracking goals is increased for the particular hardware configuration considered in this work, subject to fundamental limitations on control-plant structure. Experimental results which demonstrate the benefits of this approach are presented on a 1 degree of freedom (DOF) system.     

机车信号记录器数据分析处理系统的设计与实现

从铁路现场的实际需要出发，提出了机车信号记录器数据分析处理系统的具体设计思想和实现方法。该方法是以虚拟仪器技术为基础，结合数字信号处理（DSP）、计算机软件和智能测试等技术建立起来的，具有结构简单、性能稳定、灵活性强、交互性好和维护简单等优点。实践证明，该系统满足铁路现场对机车信号记录器记录数据分析处理的要求。     

基于FameView的港口监控系统设计

基于组态软件开发的码头实时监控系统能很好地实现港口生产的自动化要求.以某港口20万吨级铁矿石码头实时监控系统为例,介绍基于FameView组态软件的港口监控系统的设计方法.     

基于现场总线CAN的实时监控系统研究与设计

分析了国内工业监控系统现场通信技术的发展和存在的问题，介绍了CAN技术的主要特点和优势，建立了一种基于cAN总线网络的实时监控系统模型，并详细阐述了CAN总线节点硬件和软件的设计方法、CAN总线用户层协议的设计以及主监控站硬件配置和数据收发程序设计．     

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目前中国城市道路交通控制系统基本上是引用SCOOT、SCAT等国外开发的系统，这些系统皆是建立在机动车为主的道路交通条件基础之上的被动型控制系统。实践证明：这些系统不仅不适应中国的混合道路交通情况，在连续流与间断流的协调控制、公共汽车交通优先控制方面也存在问题，更难以适应于中国城市发展智能交通系统（ITS）的需要。本文是国家重点基础研究规划（973）子项目“城市交通监控与管理系统”的研究成果之一，针对中国城市道路交通的特点及以往交通控制系统的问题和未来发展的需要，提出了适用于中国城市的实时自适应控制与管理系统。     

港口机械结构应力实时监测系统研究

为了掌握港口机械承载结构工作时的技术状态,采用动态应变仪进行数据采集,用Visual C 编写实时监控软件对采集的数据进行处理,实现对港口机械结构应力的在线实时监测.分析了港口机械结构应力实时监测系统的硬件组成和软件结构,提供了对动态应变仪进行操作的函数,给出了基于VC的动态应变实时监测软件的开发方法.     

基于实时仿真平台的大功率柴油机控制策略开发与验证

针对大功率共轨柴油机的控制,设计了相应的EMS控制策略,包括柴油机的工况判断与切换、喷油控制、油轨压力控制。基于实时仿真平台,通过实时仿真对EMS控制策略进行了调整与优化,对EMS的轨压控制、喷油控制等策略进行了验证,证明了控制策略设计合理、功能正常,可以用于实际大功率柴油机的控制试验。     

A real-time signal control strategy for mitigating the impact of bus stops at urban signalized intersections

Buses stopping at transit stops reduce the capacity of signalized intersections, which can lead to excessive delays for all users. In order to avoid such phenomena, signal control strategies can be utilized. This article presents a real-time signal control strategy to mitigate the impact of bus stop operations on traffic operations along an undersaturated approach. The objective of the proposed strategy is to ensure that any residual queues due to a bus stopping are fully dissipated as soon as possible by increasing the green time for the bus stop approach as soon as the bus departs. In addition, this strategy ensures that the cross-street approaches do not become oversaturated. Kinematic wave theory is utilized to track the formation and dissipation of queues and determine the green extension (or red truncation) for the subject approach. The benefits achieved from the proposed strategy are illustrated through simulation tests at a single intersection for a variety of bus stop and bus operation characteristics. Average delay and average queue length for the bus stop and cross-street approaches, as well as for the whole intersection, are used to assess the performance of the strategy. The tests performed indicate that the signal control strategy can achieve substantial reductions in delay for the bus stop approaches and the intersection as a whole without adversely affecting the cross street operations, when the demand at those cross streets is low.     

共轨柴油机ECU仿真平台研究

提出了共轨柴油机仿真平台的设计思路、具体框架和基于Matlab/Simulink的具体实现方法,该平台提供了软件在环、硬件在环和故障仿真模拟测试等多项功能。在共轨ECU硬件在环测试中取得了与原机试验极为接近的效果,并通过故障仿真模拟测试发现了被测ECU控制策略和硬件设计方面的失误,在实际应用中验证了其准确性和可靠性。     

城市公共自行车交通系统实施机制

自行车交通由个体交通向准公共交通的转化,是城市实施公交优先战略、城市交通可持续发展战略的重要政策与举措之一。给出了公共自行车交通系统（PBS）的概念,分析总结了欧洲及国内部分城市PBS的实践与经验教训。指出适合发展PBS的城市应具备的自然环境条件,并提出因子评价法用以判断我国适宜发展该系统的城市。提出要从规划与管理、社会意识与宣传、经营与运作、技术支撑4个层面制定相关政策,保障PBS的实施,补充和完善城市综合交通系统,并分别讨论了4个层面机制包含的具体内容。