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Identifying Industrial Control Equipment Based on Rule Matching and Machine Learning
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作者 Yuhao Wang Yuying Li +1 位作者 Yanbin Sun Yu Jiang 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第10期577-605,共29页
To identify industrial control equipment is often a key step in network mapping,categorizing network resources,and attack defense.For example,if vulnerable equipment or devices can be discovered in advance and the att... To identify industrial control equipment is often a key step in network mapping,categorizing network resources,and attack defense.For example,if vulnerable equipment or devices can be discovered in advance and the attack path canbe cut off,security threats canbe effectively avoided and the stable operationof the Internet canbe ensured.The existing rule-matching method for equipment identification has limitations such as relying on experience and low scalability.This paper proposes an industrial control device identification method based on PCA-Adaboost,which integrates rule matching and machine learning.We first build a rule base from network data collection and then use single andmulti-protocol rule-matchingmethods to identify the type of industrial control devices.Finally,we utilize PCA-Adaboost to identify unlabeled data.The experimental results show that the recognition rate of this method is better than that of the traditional Nmap device recognitionmethod and the device recognition accuracy rate reaches 99%.The evaluation effect of the test data set is significantly enhanced. 展开更多
关键词 Network mapping network resource industrial control equipment IDENTIFICATION
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Cold Chain Logistics Equipment Management and Control Based on Internet of Things
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作者 秦立公 吴娇 +1 位作者 董津津 袁媛 《Agricultural Science & Technology》 CAS 2012年第5期1133-1138,共6页
The status and supporting policies of cold chain logistics equipment man- agement and control in China were described. The connotation of Internet of Things and its impact on cold chain logistics equipment management ... The status and supporting policies of cold chain logistics equipment man- agement and control in China were described. The connotation of Internet of Things and its impact on cold chain logistics equipment management and control were ana- lyzed from external form to internal nature. Through introducing the value chain and relevant equipments of cold chain logistics, the correlation between the main technologies in Internet of Things and the common indices for cold chain logistics equipment management and control was analyzed in detail. The application values of Internet of Things technologies in cold chain logistics equipment management and control were illustrated, including the sample analysis on the application of radio-frequency identification (RFID). After the establishment of BSC performance evaluation index system of cold chain logistics equipment management and control, the optimization measures and suggestions on cold chain logistics equipment management and control under Internet of Things were put forward. 展开更多
关键词 Internet of Things Cold chain logistics Equipment management and control Radio-frequency identification Balanced scorecard
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Distributed Model Predictive Load Frequency Control of Multi-area Power System with DFIGs 被引量:17
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作者 Yi Zhang Xiangjie Liu Bin Qu 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2017年第1期125-135,共11页
Reliable load frequency control LFC is crucial to the operation and design of modern electric power systems. Considering the LFC problem of a four-Area interconnected power system with wind turbines, this paper presen... Reliable load frequency control LFC is crucial to the operation and design of modern electric power systems. Considering the LFC problem of a four-Area interconnected power system with wind turbines, this paper presents a distributed model predictive control DMPC based on coordination scheme. The proposed algorithm solves a series of local optimization problems to minimize a performance objective for each control area. The generation rate constraints GRCs, load disturbance changes, and the wind speed constraints are considered. Furthermore, the DMPC algorithm may reduce the impact of the randomness and intermittence of wind turbine effectively. A performance comparison between the proposed controller with and without the participation of the wind turbines is carried out. Analysis and simulation results show possible improvements on closed-loop performance, and computational burden with the physical constraints. © 2014 Chinese Association of Automation. 展开更多
关键词 Asynchronous generators Electric control equipment Electric fault currents Electric frequency control Electric load management Electric power systems Model predictive control Optimization Press load control WIND Wind turbines
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Modeling and Simulation of Equipment Material Inventory Control Based on System Dynamics 被引量:2
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作者 WANG Bing CHEN Zhaojie LI Hao 《Journal of Donghua University(English Edition)》 EI CAS 2018年第3期256-260,共5页
The paper discusses how the inventory control of army equipment material runs sytematically under the two-level maintenance system,and establishes the inventory control model based on system dynamics.On the basis of m... The paper discusses how the inventory control of army equipment material runs sytematically under the two-level maintenance system,and establishes the inventory control model based on system dynamics.On the basis of modeling and simulation,the influence of different inventory upper limit on the whole system is studied,and the optimal inventory control mechanism under the model condition is foud.In addition,through the simulation of two replenishment strategies(s,S) and(T,s,S),the advantages and disadvantages and feasibility of each replenishment strategy are analyzed. 展开更多
关键词 inventory control system dynamics equipment material simulation
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A Systematic Approach for Designing Analytical Dynamics and Servo Control of Constrained Mechanical Systems
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作者 Xiaoli Liu Shengchao Zhen +3 位作者 Kang Huang Han Zhao Ye-Hwa Chen Ke Shao 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI 2015年第4期382-393,共12页
A systematic approach for designing analytical dynamics and servo control of constrained mechanical systems is proposed. Fundamental equation of constrained mechanical systems is first obtained according to Udwadia-Ka... A systematic approach for designing analytical dynamics and servo control of constrained mechanical systems is proposed. Fundamental equation of constrained mechanical systems is first obtained according to Udwadia-Kalaba approach which is applicable to holonomic and nonholonomic constrained systems no matter whether they satisfy the D'Alember's principle. The performance specifications are modeled as servo constraints. Constraint-following servo control is used to realize the servo constraints. For this inverse dynamics control problem, the determination of control inputs is based on the Moore-Penrose generalized inverse to complete the specified motion. Secondorder constraints are used in the dynamics and servo control. Constraint violation suppression methods can be adopted to eliminate constraint drift in the numerical simulation. Furthermore, this proposed approach is applicable to not only fully actuated but also underactuated and redundantly actuated mechanical systems. Two-mass spring system and coordinated robot system are presented as examples for illustration. © 2014 Chinese Association of Automation. 展开更多
关键词 DYNAMICS Inverse problems Numerical methods Pneumatic control equipment
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Nursing bed used in the smart home environment 被引量:4
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作者 QIN Haichun ZHAO Cong +1 位作者 WU Bo ZHANG Li 《Computer Aided Drafting,Design and Manufacturing》 2013年第1期58-61,共4页
According to the bedridden patient's physical condition, one kind of electric nursing bed which can be used in the smart home environment and realize many' kinds of posture transformation. This paper introduces the ... According to the bedridden patient's physical condition, one kind of electric nursing bed which can be used in the smart home environment and realize many' kinds of posture transformation. This paper introduces the mechanical system design of the electric nursing bed and the method of integration with the smart home environment, designs the combined bed board and the mechanical structure of posture transformation, remote controlling equipments in the smart home environment. 展开更多
关键词 posture transformation combined bed board remote controlling equipments
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A practical nonlinear robust control approach of electro-hydraulic load simulator 被引量:10
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作者 Wang Chengwen Jiao Zongxia +1 位作者 Wu Shuai Shang Yaoxing 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2014年第3期735-744,共10页
This paper studies a nonlinear robust control algorithm of the electro-hydraulic load simulator (EHLS). The tracking performance of the EHLS is mainly limited by the actuator's motion disturbance, flow nonlinearity... This paper studies a nonlinear robust control algorithm of the electro-hydraulic load simulator (EHLS). The tracking performance of the EHLS is mainly limited by the actuator's motion disturbance, flow nonlinearity, and friction, etc. The developed controller is developed based on the nonlinear motion loading model. The problems of the actuator's disturbance and flow nonlinearity are considered. To address the friction problem, the friction model of the loading motor is identified experimentally. The friction disturbance is compensated using the obtained friction model. Therefore, this paper considers the main three factors comprehensively. The developed algorithm is easy to apply since the controller can be obtained just with one step back-stepping design. The stability of the developed algorithm is proven via Lyapunov analysis. Both co-simulation and experiments are performed to verify the effectiveness of this method. 展开更多
关键词 CO-SIMULATION Electro-hydraulic load simulator Hydraulic control equipment Nonlinear robust control Parametric uncertainty
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Modeling and Control of Active Suspensions for MDOF Vehicle
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作者 李克强 郑四发 +2 位作者 杨殿阁 连小珉 永井正夫 《Tsinghua Science and Technology》 SCIE EI CAS 2003年第2期224-230,共7页
An MDOF model was developed including the influence of factors such as the engine, the seats, and the passengers to describe vehicle motion using a reduced order model of the controller designed by using the H∞ contr... An MDOF model was developed including the influence of factors such as the engine, the seats, and the passengers to describe vehicle motion using a reduced order model of the controller designed by using the H∞ control method. The control system performance has been investigated by comparing the H∞ controller with a linear quadratic (LQ) controller. 展开更多
关键词 control equipment control systems Degrees of freedom (mechanics)
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Optimization Based on Convergence Velocity and Reliability for Hydraulic Servo System 被引量:5
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作者 Muhammad Babar Nazir 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2009年第4期407-412,共6页
This article presents an optimal hybrid fuzzy proportion integral derivative (HFPID) controller based on combination of proportion integral derivative (PID) and fuzzy controllers, by which the parameters could be ... This article presents an optimal hybrid fuzzy proportion integral derivative (HFPID) controller based on combination of proportion integral derivative (PID) and fuzzy controllers, by which the parameters could be evaluated by global optimization either in convergence velocity or in convergence reliability. Focusing on the nonlinear factors of hydraulic servo system, this article takes advantage of PID and fuzzy logic controller integrated with scaling factors to acquire precise tracking performances. To further improve the performances, it provides new developed optimization with rapid convergence to attain reliable approach probability. Focusing on the performance indictors of evolutionary algorithm, this article presents a new technique to predict reliability of the optimization algorithm. Statistics authenticates the effectiveness and robustness of the optimization. Further, many simulation and experimental results indicate that the optimal HFPID could acquire perfect immunity against parametric uncertainties with external disturbance. 展开更多
关键词 adaptive control system novel evolutionary algorithm hydraulic control equipment convergence velocity convergencereliability OPTIMIZATION
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Tunable fiber ring laser employing a Sagnac interferometric filter 被引量:2
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作者 金晓峰 周柯江 《Chinese Optics Letters》 SCIE EI CAS CSCD 2005年第10期600-602,共3页
A tunable erbium-doped fiber ring laser employing an all-polarization-maintaining fiber loop filter is proposed and demonstrated. The lasing frequencies can be selected by properly adjusting the polarization controlle... A tunable erbium-doped fiber ring laser employing an all-polarization-maintaining fiber loop filter is proposed and demonstrated. The lasing frequencies can be selected by properly adjusting the polarization controller in the cavity. 展开更多
关键词 control equipment ERBIUM Fiber lasers Frequencies INTERFEROMETRY Optical filters Polarization Tuning
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A new method of studying collapsibility of loess
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作者 Yuanqing ZHU Zhenghan CHEN 《Frontiers of Structural and Civil Engineering》 SCIE EI 2009年第3期305-311,共7页
A new triaxial testing system that could control suction in wetting-induced collapsible tests was success-fully developed to study the suction effects on wetting-induced collapsible deformation.The pedestal of the tri... A new triaxial testing system that could control suction in wetting-induced collapsible tests was success-fully developed to study the suction effects on wetting-induced collapsible deformation.The pedestal of the triaxial cell was made up of two parts,and the equipment not only could control suction but also could make water accessible to soil.A pressure/volume-controlled equip-ment was combined with the triaxial system to measure the water volume absorbed by samples accurately and to add pressure on water to filtrate into the sample.The apparatus could measure volume change precisely and keep the deviator stress unvaried,as well as measure the volume of water filtrating into the samples exactly.A triaxial collapsible testing procedure was described using the new apparatus for undisturbed collapsible loess with controlled suction.Furthermore,a series of double triaxial collapsible tests were conducted under different suctions and the same net cell pressure,and tests under different net cell pressures and the same suction were also done.It was indicated that the collapsible deformation increased with the increasing suction,and the effect of the net cell pressure on collapsible deformation was remarkable.The new triaxial apparatus was a useful facility to study the collapsible behavior of loess. 展开更多
关键词 triaxial apparatus for collapsible soils con-trolled suction pressure/volume controlled equipment double triaxial collapsible test single triaxial collapsible test
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