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基于PacketTracer和Onenet的物联网家居系统
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作者 黄良歌 叶成荫 +2 位作者 程少杰 侯旭晖 武旭鹏 《移动信息》 2024年第6期313-315,共3页
针对实物物联网家居成本过高、搭建过程复杂的问题,文中使用PacketTracer和OneNet云平台设计了一种物联网智能家居系统。该系统使用PacketTracer方法进行了设计,并通过MCU将智能家居设备远程接入OneNet云平台。测试结果表明,与传统的实... 针对实物物联网家居成本过高、搭建过程复杂的问题,文中使用PacketTracer和OneNet云平台设计了一种物联网智能家居系统。该系统使用PacketTracer方法进行了设计,并通过MCU将智能家居设备远程接入OneNet云平台。测试结果表明,与传统的实物物联网家居相比,该系统不仅缩短了设计周期,还能实现对家居设备的远程控制。 展开更多
关键词 物联网家居 packet Tracer OneNet云平台 远程控制
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Research on robust mean square stability of networked control systems with packet dropout 被引量:5
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作者 Dexiao Xie Xiaodong Han +1 位作者 He Huang Zhiquan Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第1期95-101,共7页
This paper is concerned with the robust stabilization problem of networked control systems with stochastic packet dropouts and uncertain parameters. Considering the stochastic packet dropout occuring in two channels b... This paper is concerned with the robust stabilization problem of networked control systems with stochastic packet dropouts and uncertain parameters. Considering the stochastic packet dropout occuring in two channels between the sensor and the controller, and between the controller and the actuator, networked control systems are modeled as the Markovian jump linear system with four operation modes. Based on this model, the necessary and sufficient conditions for the mean square stability of the deterministic networked control systems and uncertain networked control systems are given by using the theory of the Markovian jump linear system, and corresponding controller design procedures are proposed via the cone complementarity linearization method. Finally, the numerical example and simulations are given to illustrate the effectiveness of the proposed results. 展开更多
关键词 networked control system packet dropout meansquare stability Markovian jump linear system.
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Fault Detection of Networked Control Systems Subject to Access Constraints and Random Packet Dropout 被引量:15
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作者 WANG Yong-Qiang YE Hao +1 位作者 DING Steven WANG Gui-Zeng 《自动化学报》 EI CSCD 北大核心 2009年第9期1230-1234,共5页
关键词 故障检测 网路控制 接入约束 残差
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Stochastic optimal control of networked control systems with control packet dropouts 被引量:1
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作者 Shouwan GAO Gongyou TANG 《控制理论与应用(英文版)》 EI 2012年第3期410-414,共5页
This paper considers the stochastic optimal control problem for networked control systems (NCSs) with control packet dropouts. The proportional plus up to the third-order derivative (PD3) compensation strategy is ... This paper considers the stochastic optimal control problem for networked control systems (NCSs) with control packet dropouts. The proportional plus up to the third-order derivative (PD3) compensation strategy is adopted to compensate for control packet dropouts at the actuator by using the past control packets stored in the buffer. Based onthe strategy, a new NCS structure model with packet dropouts is provided, where the packet dropout is assumed to obey the Bernoulli random binary distribution. In terms of the given model, the stochastic optimal control law is proposed. Numerical examples illustrate the effectiveness of the results. 展开更多
关键词 Networked control systems packet dropout Stochastic systems Optimal control
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Guaranteed Cost Active Fault-tolerant Control of Networked Control System with Packet Dropout and Transmission Delay 被引量:5
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作者 Xiao-Yuan Luo Mei-Jie Shang +1 位作者 Cai-Lian Chen Xin-Ping Guan 《International Journal of Automation and computing》 EI 2010年第4期509-515,共7页
The problem of guaranteed cost active fault-tolerant controller (AFTC) design for networked control systems (NCSs) with both packet dropout and transmission delay is studied in this paper. Considering the packet d... The problem of guaranteed cost active fault-tolerant controller (AFTC) design for networked control systems (NCSs) with both packet dropout and transmission delay is studied in this paper. Considering the packet dropout and transmission delay, a piecewise constant controller is adopted. With a guaranteed cost function, optimal controllers whose number is equal to the number of actuators are designed, and the design process is formulated as a convex optimal problem that can be solved by existing software. The control strategy is proposed as follows: when actuator failures appear, the fault detection and isolation unit sends out the information to the controller choosing strategy, and then the optimal stabilizing controller with the smallest guaranteed cost value is chosen. Two illustrative examples are given to demonstrate the effectiveness of the proposed approach. By comparing with the existing methods, it can be seen that our method has a better performance. 展开更多
关键词 Networked control system (NCS) packet dropout transmission delay active fault-tolerant control (AFTC) guaranteed cost controller.
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Observer-based H_∞ control over packet dropping networks 被引量:1
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作者 Zhang Dongmei Wang Xingang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2008年第6期1215-1225,共11页
A new controller design problem of networked control systems with packet dropping is proposed. Depending on the place that the observer is put in the system, the network control systems with packet dropping are modele... A new controller design problem of networked control systems with packet dropping is proposed. Depending on the place that the observer is put in the system, the network control systems with packet dropping are modeled as stochastic systems with the random variables satisfying the Bernoulli random binary distribution. The observer-based controller is designed to stabilize the networked system in the sense of mean square, and the prescribed H∞ disturbance attenuation level is achieved. The controller design problem is formulated as the feasibility of the convex optimization problem, which can be solved by a linear matrix inequality (LMI) approach. Numerical examples illustrate the effectiveness of the proposed methods. 展开更多
关键词 networked control systems packet dropping linear matrix inequality
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Fault Tolerant Control for Networked Control Systems with Packet Loss and Time Delay 被引量:5
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作者 Ming-Yue Zhao He-Ping Liu +1 位作者 Zhi-Jun Li De-Hui Sun 《International Journal of Automation and computing》 EI 2011年第2期244-253,共10页
In this paper,a fault tolerant control with the consideration of actuator fault for a networked control system (NCS) with packet loss is addressed.The NCS with data packet loss can be described as a switched system ... In this paper,a fault tolerant control with the consideration of actuator fault for a networked control system (NCS) with packet loss is addressed.The NCS with data packet loss can be described as a switched system model.Packet loss dependent Lyapunov function is used and a fault tolerant controller is proposed respectively for arbitrary packet loss process and Markovian packet loss process.Considering a controlled plant with external energy-bounded disturbance,a robust H ∞ fault tolerant controller is designed for the NCS.These results are also expanded to the NCS with packet loss and networked-induced delay.Numerical examples are given to illustrate the effectiveness of the proposed design method. 展开更多
关键词 Fault tolerant control networked control system (NCS) packet loss actuator fault time delay.
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Stability and Stabilization of Networked Control Systems with Bounded Packet Dropout 被引量:9
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作者 SUN Ye-Guo QIN Shi-Yin 《自动化学报》 EI CSCD 北大核心 2011年第1期113-117,共5页
在这份报纸,与围住的包退学学生一起的联网的控制系统(NCS ) 的一个类的稳定性和稳定问题被调查。一条反复的途径被建议作为 Markovian 与围住的包退学学生一起为 NCS 建模跳线性系统(MJLS ) 。MJLS 的转变可能性由于网络的复杂性是部... 在这份报纸,与围住的包退学学生一起的联网的控制系统(NCS ) 的一个类的稳定性和稳定问题被调查。一条反复的途径被建议作为 Markovian 与围住的包退学学生一起为 NCS 建模跳线性系统(MJLS ) 。MJLS 的转变可能性由于网络的复杂性是部分未知的。在考虑下面的系统是更一般的,它完全用盖住系统知道并且完全未知的转变可能性作为二个空间案例。而且, sensor-to-controller 和 controller-to-actuator 包退学学生同时被考虑。为内在的系统的随机的稳定性和稳定的足够的条件经由线性矩阵不平等(LMI ) 被导出明确的表达。最后,二个解说性的例子被给表明建议结果的有效性。 展开更多
关键词 控制系统 稳定性 NCSs HVAC
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A novel intrusion detection model for the CAN bus packet of in-vehicle network based on attention mechanism and autoencoder 被引量:1
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作者 Pengcheng Wei Bo Wang +2 位作者 Xiaojun Dai Li Li Fangcheng He 《Digital Communications and Networks》 SCIE CSCD 2023年第1期14-21,共8页
The attacks on in-vehicle Controller Area Network(CAN)bus messages severely disrupt normal communication between vehicles.Therefore,researches on intrusion detection models for CAN have positive business value for veh... The attacks on in-vehicle Controller Area Network(CAN)bus messages severely disrupt normal communication between vehicles.Therefore,researches on intrusion detection models for CAN have positive business value for vehicle security,and the intrusion detection technology for CAN bus messages can effectively protect the invehicle network from unlawful attacks.Previous machine learning-based models are unable to effectively identify intrusive abnormal messages due to their inherent shortcomings.Hence,to address the shortcomings of the previous machine learning-based intrusion detection technique,we propose a novel method using Attention Mechanism and AutoEncoder for Intrusion Detection(AMAEID).The AMAEID model first converts the raw hexadecimal message data into binary format to obtain better input.Then the AMAEID model encodes and decodes the binary message data using a multi-layer denoising autoencoder model to obtain a hidden feature representation that can represent the potential features behind the message data at a deeper level.Finally,the AMAEID model uses the attention mechanism and the fully connected layer network to infer whether the message is an abnormal message or not.The experimental results with three evaluation metrics on a real in-vehicle CAN bus message dataset outperform some traditional machine learning algorithms,demonstrating the effectiveness of the AMAEID model. 展开更多
关键词 controller area network bus packet In-vehicle network Attention mechanism Autoencoder
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Impulsive controller design for nonlinear networked control systems with time delay and packet dropouts 被引量:2
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作者 Xianlin Zhao Shumin Fei Jinxing Lin 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第3期414-418,共5页
The globally exponential stability of nonlinear impul- sive networked control systems (NINCS) with time delay and packet dropouts is investigated. By applying Lyapunov function theory, sufficient conditions on the g... The globally exponential stability of nonlinear impul- sive networked control systems (NINCS) with time delay and packet dropouts is investigated. By applying Lyapunov function theory, sufficient conditions on the global exponential stability are derived by introducing a comparison system and estimating the corresponding Cauchy matrix. An impulsive controller is explicitly designed to achieve exponential stability and ensure state con- verge with a given decay rate for the system. The Lorenz oscillator system is presented as a numerical example to illustrate the theo- retical results and effectiveness of the proposed controller design procedure. 展开更多
关键词 nonlinear impulsive networked control system (NINCS) exponential stability packet dropout.
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Observer-based H-infinity control in multiple channel networked control systems with random packet dropouts 被引量:1
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作者 Weiwei CHE Jianliang WANG Guanghong YANG 《控制理论与应用(英文版)》 EI 2010年第3期359-367,共9页
This paper investigates the observer-based H-infinity control problem for networked control systems (NCSs) with random packet dropouts. A general packet dropout model with multiple independent stochastic variables i... This paper investigates the observer-based H-infinity control problem for networked control systems (NCSs) with random packet dropouts. A general packet dropout model with multiple independent stochastic variables in the multiple channels case is adopted to describe the data missing in the limited communication channels. With the consideration of the sensor-to-controller and controller-to-actuator packet dropouts at the same time, a new method is pro- posed based on a separation lemma to design an observer-based H-infinity controller, which exponentially stabilizes the closed-loop system in the sense of mean square and also achieves a prescribed H-infinity disturbance attenuation level. A numerical example is given to illustrate the effectiveness of the proposed control method. 展开更多
关键词 Networked control system (NCS) H-infinity control Separation lemma Random packet dropouts LMI
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Fault detection observer design for networked control system with long time-delays and data packet dropout 被引量:3
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作者 Xuan Li Xiaobei Wu +1 位作者 Zhiliang Xu Cheng Huang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第5期877-882,共6页
Focusing on the networked control system with long time-delays and data packet dropout,the problem of observerbased fault detection of the system is studied.According to conditions of data arrival of the controller,th... Focusing on the networked control system with long time-delays and data packet dropout,the problem of observerbased fault detection of the system is studied.According to conditions of data arrival of the controller,the state observers of the system are designed to detect faults when they occur in the system.When the system is normal,the observers system is modeled as an uncertain switched system.Based on the model,stability condition of the whole system is given.When conditions are satisfied,the system is asymptotically stable.When a fault occurs,the observers residual can change rapidly to detect the fault.A numerical example shows the effectiveness of the proposed method. 展开更多
关键词 networked control system fault detection long timedelays data packet dropout.
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Controller design for networked control system with data packet dropout and transmission delays 被引量:2
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作者 Xinping GUAN Shuangfeng DAI Chengnian LONG 《控制理论与应用(英文版)》 EI 2007年第3期227-232,共6页
In this paper, the stabilization problem for a class of networked control systems (NCSs) with data packet dropouts and transmission time delays is considered, where the delays are time-varying and uncertain, the dat... In this paper, the stabilization problem for a class of networked control systems (NCSs) with data packet dropouts and transmission time delays is considered, where the delays are time-varying and uncertain, the data packet dropout is modeled as a two-state Markov chain. To compensate the lost packet, a data packet dropout compensator is established. Thus a more realistic model for such NCSs is presented. Sufficient conditions for the stabilization of the new resulting system are derived in the form of linear matrix inequalities (LMIs). Numerical example illustrates the solvability and effectiveness of the results. 展开更多
关键词 Networked control system Network-induced time delays Data packet dropout Markov chain Linear matrix inequalities
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含丢包和量化的网络控制系统随机鲁棒稳定 被引量:1
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作者 王后能 牛松梅 李自成 《控制工程》 CSCD 北大核心 2024年第2期288-294,共7页
针对一类含有随机丢包和考虑信号量化情况下的网络控制系统,通过量化状态反馈控制方法,研究了系统的随机鲁棒稳定性问题。采用满足伯努利分布的随机变量对丢包过程进行建模;同时,采用对数量化器对传感器-控制器通道的信号进行量化,利用... 针对一类含有随机丢包和考虑信号量化情况下的网络控制系统,通过量化状态反馈控制方法,研究了系统的随机鲁棒稳定性问题。采用满足伯努利分布的随机变量对丢包过程进行建模;同时,采用对数量化器对传感器-控制器通道的信号进行量化,利用扇形界的方法将产生的量化误差描述为扇形界的不确定性。设计状态反馈控制器,结合所设计的量化器和随机丢包模型,利用Lyapunov函数和线性矩阵不等式方法得到系统稳定和鲁棒稳定的充分条件。最后,利用数值仿真实例验证了所提方法的有效性。 展开更多
关键词 网络控制系统 丢包 量化 状态反馈
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Research on robust fault-tolerant control for networked control system with packet dropout 被引量:50
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作者 Huo Zhihong Fang Huajing 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2007年第1期76-82,共7页
A kind of networked control system with network-induced delay and packet dropout, modeled on asynchronous dynamical systems was tested, and the integrity design of the networked control system with sensors failures an... A kind of networked control system with network-induced delay and packet dropout, modeled on asynchronous dynamical systems was tested, and the integrity design of the networked control system with sensors failures and actuators failures was analyzed using hybrid systems technique based on the robust fault-tolerant control theory. The parametric expression of controller is given based on the feasible solution of linear matrix inequality. The simulation results are provided on the basis of detailed theoretical analysis, which further demonstrate the validity of the proposed schema. 展开更多
关键词 Networked control system (NCS) Fault-tolerant control (FTC) Asynchronous dynamical systems (ADS) Integrity design packet dropout Time delay
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Gyration:基于RTT测量的报文偏转拥塞控制算法
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作者 陆平静 余佳仁 袁郭苑 《计算机工程与科学》 CSCD 北大核心 2024年第11期1908-1915,共8页
高效的拥塞控制一直是数据中心网络领域的一个重要挑战。往返时延RTT的精确测量是基于RTT的反应型拥塞控制算法的关键。基于Swift拥塞控制算法,提出一种基于RTT测量的报文偏转拥塞控制算法——Gyration,将偏转报文延迟添加到RTT计算过程... 高效的拥塞控制一直是数据中心网络领域的一个重要挑战。往返时延RTT的精确测量是基于RTT的反应型拥塞控制算法的关键。基于Swift拥塞控制算法,提出一种基于RTT测量的报文偏转拥塞控制算法——Gyration,将偏转报文延迟添加到RTT计算过程,在偏转拥塞控制算法中增加偏转延迟的测量,使RTT计算更准确,更加精确地评估网络拥塞情况。实验结果表明,相比Swift算法,在重负载的Cache Follower、Data Mining、Web Search和Web Server流量模式下,Gyration将流完成时间FCT缩短了20%,80%,13%和60%,吞吐量提高了38%,6%,15%和2%,实现了对数据中心网络更加及时、精确的拥塞控制,有效缓解了数据中心网络拥塞问题。 展开更多
关键词 数据中心网络 拥塞控制 报文偏转 往返时延 流完成时间
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具有访问约束和数据丢包的网络化系统H_(∞)鲁棒控制
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作者 祝超群 姚兴启 《兰州理工大学学报》 CAS 北大核心 2024年第5期86-93,共8页
针对同时存在访问约束和数据丢包的网络化控制系统,研究了H_(∞)鲁棒控制方法的设计问题.首先,采用Bernoulli随机过程来描述系统的数据丢包过程,并根据介质访问约束的随机访问机制建立了离散时间马尔可夫跳变系统模型;其次,通过Lyapuno... 针对同时存在访问约束和数据丢包的网络化控制系统,研究了H_(∞)鲁棒控制方法的设计问题.首先,采用Bernoulli随机过程来描述系统的数据丢包过程,并根据介质访问约束的随机访问机制建立了离散时间马尔可夫跳变系统模型;其次,通过Lyapunov稳定性理论和LMI技术导出闭环系统随机稳定的充分条件,并设计了相应的H_(∞)鲁棒控制器,使得闭环系统随机稳定并具有给定的H_(∞)性能;最后,通过仿真算例验证了所提控制方案的正确性和有效性. 展开更多
关键词 网络化控制系统 介质访问约束 数据丢包 H_∞鲁棒控制
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DIP改革背景下负向医疗行为成因及治理策略分析
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作者 侯慧玉 张少华 +3 位作者 田溢卿 王建斌 李景涛 王亚珍 《医学与哲学》 北大核心 2024年第14期28-31,共4页
从医保管理部门、医疗机构和参保患者三个维度对医保支付方式改革背景下负向医疗行为的成因进行分析,发现以下问题:医保管理部门的法律制度不健全、部门联动缺失、双向沟通机制不完善,医疗机构的管理精细化程度不够、绩效考核体系落后... 从医保管理部门、医疗机构和参保患者三个维度对医保支付方式改革背景下负向医疗行为的成因进行分析,发现以下问题:医保管理部门的法律制度不健全、部门联动缺失、双向沟通机制不完善,医疗机构的管理精细化程度不够、绩效考核体系落后、双向转诊落实不理想,部分参保患者存在负向就医行为。因此,避免负向医疗行为发生的治理策略包括:医保管理部门应健全法律制度体系、建立部门联动机制、拓展双向沟通渠道,医疗机构应推进管理精细化程度、调整绩效考核体系、建立分级诊疗秩序,参保患者应提高道德感使命感,共同维护医保基金安全。 展开更多
关键词 医疗保险 按病种分值付费 医疗费用控制 负向医疗行为
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网络控制系统中利用主动丢包的重放攻击检测方法
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作者 胡健坤 尹逊和 陈丽红 《北京交通大学学报》 CAS CSCD 北大核心 2024年第2期134-143,共10页
为实现网络控制系统(Networked Control Systems,NCS)中重放攻击的检测,在现有研究利用物理水印检测重放攻击的启发下,设计了利用主动丢包对重放攻击进行实时检测的方法 .首先,在理论层面上,利用系统输出的残差构建检测函数,并通过受攻... 为实现网络控制系统(Networked Control Systems,NCS)中重放攻击的检测,在现有研究利用物理水印检测重放攻击的启发下,设计了利用主动丢包对重放攻击进行实时检测的方法 .首先,在理论层面上,利用系统输出的残差构建检测函数,并通过受攻击前后检测函数的变化,证明该检测方法的有效性.然后,以一辆四轮汽车为被控对象,比较车辆受攻击前后速度与检测函数的变化.最后,综合考虑车辆对重放攻击的检测结果与速度跟踪结果,确定车辆的最优主动丢包率的范围区间.结果表明:加入主动丢包前,车辆受到重放攻击时,速度会发生剧烈变化而检测函数几乎没有变化;加入主动丢包后,车辆受到重放攻击时,速度剧烈变化的同时检测函数也产生了剧烈的变化;主动丢包率为12%~16%时,系统既能够准确地检测出重放攻击,又能够保证车辆平稳行驶,为后续的重放攻击检测研究提供了参考. 展开更多
关键词 网络控制系统 重放攻击 主动丢包 卡方检测
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DIP付费试点下内蒙古某三甲医院按病种医疗费用控制研究 被引量:3
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作者 王文鑫 周东波 +2 位作者 李玉霞 彭宏宇 曲建卫 《卫生软科学》 2024年第2期10-13,共4页
[目的]为有效降低住院医疗费用、减轻群众就医负担提供实证依据。[方法]收集国家DIP付费试点城市某医院试点前(2021年)与试点后(2022-2023年)相应数据。采用结构变动度分析方法对医疗费用结构进行分析,采用方差分析法对各年度参保住院... [目的]为有效降低住院医疗费用、减轻群众就医负担提供实证依据。[方法]收集国家DIP付费试点城市某医院试点前(2021年)与试点后(2022-2023年)相应数据。采用结构变动度分析方法对医疗费用结构进行分析,采用方差分析法对各年度参保住院患者医疗费用负担的差异性进行分析。[结果]2021-2023年度次均住院总费用、药品费、耗材费、实验室检查费、影像检查费、其他医疗服务费间差异均具有统计学意义(P<0.01)。2021-2022年医疗费用结构变动度(23.71%)最高,其中,影像学检查占比结构变动值为-6.52%,药品费用占比结构变动值为-5.33%。2021-2023年,各年住院患者医保报销费用、患者自付费用、患者自付比例差异均具有统计学意义(P<0.001)。[结论]按病种医疗费用控制工作的开展,使住院总费用呈逐年下降趋势,药品费用、影像学检查费用下降幅度较大,但耗材费用与实验室检查费结构变动幅度较小。 展开更多
关键词 DIP付费 结构变动 医疗费用控制
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