Actuator Fault Detection for Sampled-Data Systems in H∞ Setting

Actuator fault detection for sampled-data systems was investigated from the viewpoint of jump systems.With the aid of a prior frequency information on fault, such a problem is converted to an augmented H∞ filtering problem. A simple state-space approach is then proposed todeal with sampled-data actuator fault detection problem. Compared with the existed approaches, the proposed approach allows parameters of the sampled-data system being time-varying with consideration of measurement noise.     

无人水下航行器网络控制器设计

传统无人水下航行器采用集中式结构设计,导致系统计算负担重、容错能力差、结构复杂.设计并实现了基于分布式结构的网络控制器,分析系统的工作原理,建立网络控制模型,设计网络控制器数据传输协议,并给出了硬件设计思路和软件开发,通过试验对网络控制器进行了验证。     

Controllability, Observability and Stability for a Class of Fractional-Order Linear Time-Invariant Control Systems

IntroductionThe concepts of controllability and observabil-ity,introduced by Kalman[1] ,are of extreme im-portance in control theory and engineering. Thereal objects are generally fractional[2 ] ,however,the control systems used so far are all consideredas integer- order systems.Disregarding the real or-der of the systems was caused mainly by the com-plexity and the absence of adequate mathematicaltools.The fractional calculus theory was devel-oped by a lotof mathematicians and the applicatio…     

基于实时信息的城市道路交通状态评价指标体系研究

分析建立城市道路交通状态评价指标体系的目的和作用,从不同角度对城市道路交通状态的含义进行界定.以实时采集到的各类交通信息为基础,针对交通指挥、交通引导和交通控制等系统的需求,建立了一套城市道路交通状态评价指标体系,并提出了各指标的计算方法.     

静音发电机组在野战车载系统中的应用技术研究

简要介绍了静音发电机组的外军应用情况及技术特点,提出了研制过程中涉及的关键技术及其方案。     

Finite element calculations of rail vibration countermeasures

Elastic waves may constitute a nuisance for people living close to high-speed lines. In order to decrease the spread of vibrations, it is common to reinforce the ground with lime cement columns. This article presents the results of simulations of three different ways to install the columns. The calculations have been done with an integrated rigid body—finite element model. Equations from various physical domains are merged into one big system. The results indicate that the straight configuration works best to protect the track. When attention is focused on preventing vibrations from the soil, the leaning column method is more effective. The chosen technique would depend on the aims of the countermeasure.     

轨道交通牵引供电系统仿真中的算法研究

由于城市轨道交通直流供电系统建模后表现出非线性特性,对模型求解的仿真算法大都基于迭代技术。文章介绍了双重线性迭代和牛顿迭代两种算法,并从收敛效果和快速性两方面对它们进行了测试对比分析,同时通过改变电路结构模型和选用合适的迭代算法得到了理想的仿真效果。     

光学定位系统在封接定位中的应用

在分析光学定位系统的设计原理和结构的基础上,重点探讨了该系统采用自控技术在封接定位中的具体应用及其实现定位精度要求的具体方法,并对系统的应用效果进行全面评估。     

专家模拟系统在柔性制造系统设计中的应用

柔性制造系统设计的好坏直接影响其成败，文中提出了专家模拟系统在柔性制造系统设计中应用的思路，讨论了运用多库协同技术和旁路链接推理的实现方法，实例证明十分有效。     

基于安全通信的风险分析技术应用

本文主要介绍了用于列车控制等信号系统设计过程中的风险管理技术,着重描述了风险的概念和分析的过程,并介绍了依据欧洲铁路标准EN50126中风险分析的要求,具体对联锁系统的安全通信子系统进行了风险分析实践的描述。