A new approach to robust reliable H∞ control for uncertain nonlinear systems

This paper focuses on the optimal robust reliable H_∞ control for a class of uncertain nonlinear systems with actuator faults. A new method of annihilating uncertain matrix is proposed. Based on this approach, a new method of disposing of the phenomenon of uncertain matrices multiplication is provided. In accordance with the method, the optimal robust reliable H_∞ control problem for uncertain nonlinear systems is settled by employing state feedback, in terms of linear matrix inequality (LMI). Finally, two illustrative examples are given to show the feasibility and validity of the proposed method.     

Internet可靠多点投递拥塞控制研究进展

Ｉｎｔｅｒｎｅｔ可靠多点投递拥塞控制研究是当前可靠多点投递协议研究的活跃领域,许多多点投递拥塞控制机制已经提出来了。文中首先提出了Ｉｎｔｅｒｎｅｔ可靠多点投资拥塞控制的基本问题,然后概述解决这些问题的方案和遇到的困难,最后指出将来的工作方向。     

MODEL-BASED DEVELOPMENT OF REAL-TIME SOFTWARE SYSTEM FOR ELECTRONIC UNIT PUMP SYSTEM

A real-time operating system (RTOS), also named OS, is designed based on the hardware platform of MC68376, and is implemented in the electronic control system for unit pump in diesel engine. A parallel and time-based task division method is introduced and the multi-task software architecture is built in the software system for electronic unit pump (EUP) system. The V-model software development process is used to control algorithm of each task. The simulation results of the hardware-in-the-loop simulation system (HILSS) and the engine experimental results show that the OS is an efficient real-time kernel, and can meet the real-time demands of EUP system; The built multi-task software system is real-time, determinate and reliable. V-model development is a good development process of control algorithms for EUP system, the control precision of control system can be ensured, and the development cycle and cost are also decreased.     

Inrush current estimation and hot-swapping for safe parallel battery pack

ABSTRACT

Batteries used in electric vehicles and microgrid applications use battery modules connected in series to satisfy the voltage required for each system, and battery modules are connected in parallel to increase capacity. In this parallel connected system, in order to disconnect and reconnect a specific battery module or to reconnect a new battery module, the battery module to be newly connected should have a small state of charge (SOC) difference from the existing battery modules. In particular, when a new battery is to be connected under a load current, there is a problem that excessive inrush current may occur in a specific battery module due to the load current distributed to each module and the current due to the SOC difference. Therefore, in this paper, we propose a method of estimating the inrush current through an equivalent electrical modelling analysis for the case where a battery module is newly added in a system in which the battery modules are connected in parallel. In addition, the power management algorithm for the battery pack system with inrush current estimation is presented. The proposed method is validated through simulations and experiments of a battery pack system in which 10 battery modules of 710V and 120Ah are connected in parallel.     

基于GPRS的路用试验仪器远程监测系统的可靠通信技术研究

介绍了基于GPRS的路用试验仪器远程监测系统的组网方案,分析了公路工地实验室的特点,制定了重发机制、心跳机制、校验机制和本地端将数据进行编号并备份存储,远程端索要数据等保障系统可靠通信的通信协议,并详细介绍了通信的软件实现。工程应用和通信可靠性试验证明设计的远程测量系统具有较高的通信可靠性和运行稳定性。     

基于依参数分离算子的鲁棒可靠滤波器设计

针对凸面体不确定系统并考虑传感器发生故障的情况, 基于二次型分离算子进行了鲁棒可靠滤波器设计的研究. 利用不确定系统鲁棒镇定时的拓扑解释, 采用分离算子将不含故障描述的系统矩阵与故障描述矩阵进行解耦, 从而获得对故障不敏感的鲁棒可靠滤波器. 为进一步降低设计的保守性, 文中还给出了一种依参数分离算子的滤波器存在条件, 并将滤波器设计转化为线性矩阵不等式 (LMIs) 表述的凸优化问题. 仿真实例验证了文中所提出设计方法的有效性.     

使用主动前向纠错技术的可扩展的可靠组播协议

在分析研究了一些现有可靠组播协议的基础上,提出了一种主动前向纠错的可扩展可靠组播协议AFR,该协议能够使传送丢失数据的恢复包本地化,且只能到达需要它的组播接收者,从而节省了网络资源,降低了对接收者处理能力的要求,而所需要的开销也非常小。     

分布式计算中可靠的数据放置方法

数据放置活动在以计算为主的分布式计算中被看作是次要的任务。文章将数据放置工作与计算工作区别对待,定义分布式计算过程中的数据放置模型,给出数据放置协议和可靠的数据传输算法,使得数据放置活动在分布式计算中像计算工作一样被排列、调度、监控、管理以及检测。对数据放置方法进行了系统的评价,取得了较好的效果。     

具有FACTS设备的多目标电网规划

提出了具有灵活交流输电 (FACTS)设备的多目标妥协规划模型 ,综合考虑了FACTS设备对电网规划的经济性和可靠性两方面的影响 ,并采用混合遗传—模拟退火算法求解了该模型。算例结果表明FACTS设备能够提高电网规划的经济性及经济性与可靠性的综合水平 ,并证明了多目标电网规划妥协模型及其解算方法的有效性     

悬挂式曲轴调质热处理生产线的研制

介绍悬挂式曲轴调质热处理生产线的研制过程 ,阐述在加热炉炉门和炉顶密封、曲轴悬挂输送快速出炉、淬火 ,快速均匀冷却、设备程序运行可靠等方面的研制方法以及生产线的研制结论。