Journal of Control Science and Engineering最新文献_第9页

Investigations of the Gas-Liquid Multiphase System Involving Macro-Instability in a Baffled Stirred Tank Reactor 隔板搅拌槽式反应器气液多相体系宏观不稳定性研究

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-10-01 DOI: 10.1155/2016/3075321

Shuo Zhang, Jean Talaga, David Müller, M. Dyląg, G. Wozny

{"title":"Investigations of the Gas-Liquid Multiphase System Involving Macro-Instability in a Baffled Stirred Tank Reactor","authors":"Shuo Zhang, Jean Talaga, David Müller, M. Dyląg, G. Wozny","doi":"10.1155/2016/3075321","DOIUrl":"https://doi.org/10.1155/2016/3075321","url":null,"abstract":"Bubble Sauter Mean Diameter SMD in gas-liquid multiphase system is of particular interest and the quantification of gas characteristics is still a challenge today. In this contribution, multiphase Computational Fluid Dynamic CFD simulations are combined with Population Balance Model PBM to investigate the bubble SMD in baffled stirred tank reactor STR. Hereby, special attention is given to the phenomenon known as the fluid macro-instability MI, which is a large-scale low-frequency fluid velocity variation in baffled STRs, since the fluid MIs have a dominating influence on the bubble breakage and coalescence processes. The simulations, regarding the fluid velocity, are validated with Laser Doppler Anemometry LDA experiments, in which the instant radial velocity is analyzed through Fast Fourier Transform FFT spectrum. The frequency peaks of the fluid MIs are found both in the simulation and in the experiment with a high degree of accuracy. After the validation, quantitative predictions of overall bubble SMD with and without MIs are carried out. Due to the accurate prediction of the fluid field, the influence of the fluid MI to bubble SMD is presented. This result provides more adequate information for engineers working in the field of estimating bubble SMDs in baffled STRs.","PeriodicalId":46052,"journal":{"name":"Journal of Control Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77330182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Novel Relative Navigation Control Strategy Based on Relation Space Method for Autonomous Underground Articulated Vehicles 基于关系空间法的自主地下铰接车辆相对导航控制策略

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-10-01 DOI: 10.1155/2016/2352805

Fengqian Dou, Yu Meng, Li Liu, Qing Gu

引用次数: 3

Vulnerability Analysis of CSP Based on Stochastic Game Theory 基于随机博弈论的CSP脆弱性分析

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-10-01 DOI: 10.1155/2016/4147251

Jiajun Shen, Dong-qin Feng

引用次数: 2

An Improved Backstepping-Based Controller for Three-Dimensional Trajectory Tracking of a Midwater Trawl System 一种改进的基于反步的中水拖网系统三维轨迹跟踪控制器

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-09-01 DOI: 10.1155/2016/1358412

Zhao Yan, Yunsheng Mao, Chenggang Liu

引用次数: 1

Improved Distributed Model Predictive Control with Control Planning Set 基于控制计划集的改进分布式模型预测控制

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-09-01 DOI: 10.1155/2016/8167931

Wei Chen

引用次数: 4

Fault Diagnosis and Fault Tolerant Control for Non-Gaussian Singular Time-Delayed Stochastic Distribution Systems with Disturbance Based on the Rational Square-Root Model 基于有理平方根模型的非高斯奇异时滞随机分布系统故障诊断与容错控制

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-08-01 DOI: 10.1155/2016/9563481

Yuancheng Sun, Zhanhong Liang

引用次数: 2

Gait Tracking Control of Quadruped Robot Using Differential Evolution Based Structure Specified Mixed Sensitivity H∞ Robust Control 基于结构指定混合灵敏度H∞鲁棒控制的四足机器人步态跟踪控制

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-08-01 DOI: 10.1155/2016/8760215

Petrus Sutyasadi, M. Parnichkun

{"title":"Gait Tracking Control of Quadruped Robot Using Differential Evolution Based Structure Specified Mixed Sensitivity H∞ Robust Control","authors":"Petrus Sutyasadi, M. Parnichkun","doi":"10.1155/2016/8760215","DOIUrl":"https://doi.org/10.1155/2016/8760215","url":null,"abstract":"This paper proposed a control algorithm that guarantees gait tracking performance for quadruped robots. During dynamic gait motion, such as trotting, the quadruped robot is unstable. In addition to uncertainties of parameters and unmodeled dynamics, the quadruped robot always faces some disturbances. The uncertainties and disturbances contribute significant perturbation to the dynamic gait motion control of the quadruped robot. Failing to track the gait pattern properly propagates instability to the whole system and can cause the robot to fall. To overcome the uncertainties and disturbances, structured specified mixed sensitivity H∞ robust controller was proposed to control the quadruped robot legs’ joint angle positions. Before application to the real hardware, the proposed controller was tested on the quadruped robot’s leg planar dynamic model using MATLAB. The proposed controller can control the robot’s legs efficiently even under uncertainties from a set of model parameter variations. The robot was also able to maintain its stability even when it was tested under several terrain disturbances.","PeriodicalId":46052,"journal":{"name":"Journal of Control Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83669697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Synchronization of the Fractional-Order Brushless DC Motors Chaotic System 分数阶无刷直流电机混沌系统的同步

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-08-01 DOI: 10.1155/2016/1236210

Shiyun Shen, P. Zhou

引用次数: 4

Decentralized Robust Adaptive Output Feedback Stabilization for Interconnected Nonlinear Systems with Uncertainties 不确定互联非线性系统的分散鲁棒自适应输出反馈镇定

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-08-01 DOI: 10.1155/2016/3656578

Qiang Yang, Ming-Wu Zhu, Tao Jiang, Jin He, Jianying Yuan, Jianda Han

{"title":"Decentralized Robust Adaptive Output Feedback Stabilization for Interconnected Nonlinear Systems with Uncertainties","authors":"Qiang Yang, Ming-Wu Zhu, Tao Jiang, Jin He, Jianying Yuan, Jianda Han","doi":"10.1155/2016/3656578","DOIUrl":"https://doi.org/10.1155/2016/3656578","url":null,"abstract":"Based on adaptive nonlinear damping, a novel decentralized robust adaptive output feedback stabilization comprising a decentralized robust adaptive output feedback controller and a decentralized robust adaptive observer is proposed for a large-scale interconnected nonlinear system with general uncertainties, such as unknown nonlinear parameters, bounded disturbances, unknown nonlinearities, unmodeled dynamics, and unknown interconnections, which are nonlinear function of not only states and outputs but also unmodeled dynamics coming from other subsystems. In each subsystem, the proposed stabilization only has two adaptive parameters, and it is not needed to generate an additional dynamic signal or estimate the unknown parameters. Under certain assumptions, the proposed scheme guarantees that all the dynamic signals in the interconnected nonlinear system are bounded. Furthermore, the system states and estimate errors can approach arbitrarily small values by choosing the design parameters appropriately large. Finally, simulation results illustrated the effectiveness of the proposed scheme.","PeriodicalId":46052,"journal":{"name":"Journal of Control Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77447867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Decentralized Control of a Group of Homogeneous Vehicles in Obstructed Environment 障碍物环境中同质车辆群的分散控制

IF 1.7

Journal of Control Science and Engineering Pub Date : 2016-08-01 DOI: 10.1155/2016/7192371

V. Pshikhopov, M. Medvedev, A. Kolesnikov, R. Fedorenko, B. Gurenko

{"title":"Decentralized Control of a Group of Homogeneous Vehicles in Obstructed Environment","authors":"V. Pshikhopov, M. Medvedev, A. Kolesnikov, R. Fedorenko, B. Gurenko","doi":"10.1155/2016/7192371","DOIUrl":"https://doi.org/10.1155/2016/7192371","url":null,"abstract":"The presented solution is a decentralized control system with a minimal informational interaction between the objects in the group. During control and path planning the obstacles are transformed into repellers by the synthesized controls. The main feature distinguishing the developed approach from the potential fields method is that the vehicle moves in the fields of forces depending not only on the mutual positions of a robot and an obstacle but also on the additional variables allowing solving the problem of robot’s path planning using a distributed control system (Pshikhopov and Ali, 2011). Unlike the work by Pshikhopov and Ali, 2011, here an additional dynamic variable is used to introduce stable and unstable states depending on the state variables of the robot and the neighboring objects. The local control system of each vehicle uses only the values of its own speeds and coordinates and those of the neighboring objects. There is no centralized control algorithm. In the local control algorithms the obstacles are represented as vehicles being a part of the group which allows us to unify the control systems for heterogeneous groups. An analysis was performed that proves existence and asymptotic stability of the steady state motion modes. The preformed simulation confirms the synthesis and analysis results.","PeriodicalId":46052,"journal":{"name":"Journal of Control Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80471903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7