Eur. J. Control最新文献

{"title":"Discussion on: \"Adaptive and Predictive Path Tracking Control for Off-road Mobile Robots\"","authors":"K. Macek, J. Matuško, Agostino Martinelli, R. Siegwart, Jose Alfredo Guerrero Mata, R. Lozano","doi":"10.3166/ejc.13.440-446","DOIUrl":"https://doi.org/10.3166/ejc.13.440-446","url":null,"abstract":"","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"38 1","pages":"440-446"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85291367","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}

{"title":"Discussion on: ''Symmetry Reduction and Control of the Dynamics of a 2-D Rigid Circular Cylinder and a Point Vortex: Vortex Capture and Scattering''","authors":"Sebastián J. Ferraro, D. D. Diego","doi":"10.3166/ejc.13.656-658","DOIUrl":"https://doi.org/10.3166/ejc.13.656-658","url":null,"abstract":"","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"70 1","pages":"656-658"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89417717","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}

{"title":"Discussion on: \"Mean Square Exponential Stability for Stochastic Linear Discrete Time Systems\"","authors":"H. Chizeck, Chun-I Chen, Y. Ji","doi":"10.3166/ejc.12.396-399","DOIUrl":"https://doi.org/10.3166/ejc.12.396-399","url":null,"abstract":"","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"147 1","pages":"396-399"},"PeriodicalIF":0.0,"publicationDate":"2006-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77703353","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}

{"title":"Discussion on: \"Multi-layer Switching Control using Generalized Sampled-data Hold Functions\"","authors":"M. Verwoerd, O. Mason","doi":"10.3166/ejc.12.500-504","DOIUrl":"https://doi.org/10.3166/ejc.12.500-504","url":null,"abstract":"In the paper under discussion, the authors consider the problem of designing switching controllers for plants that are subject to large levels of uncertainty or to abrupt changes in their dynamics. There has been a great deal of interest in this problem in the recent past [7,2], and the potential applications of switching controllers are numerous. For instance, one approach to the design of fault-tolerant systems [3,4] is to construct models and controllers for the various operating conditions corresponding to different system malfunctions. Once the correct plant has been identified, the associated controller is switched on. Of course, in order for this type of scheme to be practical, it is vitally important to be able to identify the correct plant as quickly and efficiently as possible, and tominimise any transient effects which may result from switching to incorrect controllers during the identification process. A major issue in the design of switching control schemes is that the system can switch to destabilising controllers before finally locking onto the correct one, which leads to very poor transient behaviour. We shall refer to such switches as destabilising switches throughout this discussion. The primary contribution of the paper is to describe a novel switching control scheme, which reduces the number of undesirable, destabilising switches that occur while identifying the correct plant. In fact, under a range of assumptions, which we shall discuss in detail below, the correct plant can be identified after a finite number of switches, at most one of which is destabilising. The authors also give an upper bound on the number of switches required in order to find the correct plant. The architecture underpinning the MLSC scheme consists of several layers or levels of controllers. In fact, given n plants, P1, . . . ,Pn, the proposed architecture consists of n 2 layers, each of which contains a number of controllers. The various control layers are constructed in such a way that if i denotes the layer number, C and C0 denote controllers, and P denotes a plant model, then:","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"21 1","pages":"500-504"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73957853","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}

{"title":"Discussion on: A Comparison of Sliding Mode and Unknown Input Observer for Fault Reconstruction","authors":"M. Darouach, M. Zasadzinski, L. Boutat-Baddas","doi":"10.3166/ejc.12.261-277","DOIUrl":"https://doi.org/10.3166/ejc.12.261-277","url":null,"abstract":"where x(t) ∈ IR is the state, u(t) ∈ IR is the known input, v(t) ∈ IR is the unknown input, which can be considered as the effect of the actuator failure, and y(t) ∈ IR is the measurement output. Without loss of generality, we have rank D = q and rankC = p. The problem of the state estimation in this case is the well known unknown input one, see [4] and the references given in [2]. The necessary and sufficient conditions for the existence and the stability of the full order or reduced order observers are","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"10 1","pages":"261-277"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83959753","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}

{"title":"Discussion on: \"Energy-to-Peak Model Reduction for 2-D Discrete Systems in Fornasini-Marchesini Form\"","authors":"O. Kaneko","doi":"10.3166/ejc.12.431-436","DOIUrl":"https://doi.org/10.3166/ejc.12.431-436","url":null,"abstract":"","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"39 1","pages":"431-436"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90252840","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}

{"title":"Discussion on: \"Sensor Gain Fault Diagnosis for a Class of Nonlinear Systems\"","authors":"H. Noura, A. Chamseddine","doi":"10.3166/ejc.12.536-544","DOIUrl":"https://doi.org/10.3166/ejc.12.536-544","url":null,"abstract":"The paper by Y. Wang and D. H. Zhou proposesa method to diagnose sensor gain faults for a class ofnonlinear systems. It classifies faults into two classes:the conditionally identifiable faults and the con-ditionally detectable faults. The authors also proposeanalgorithmtofindtheidentifiableandthedetectablefaults. An observer and an adaptive law aredesigned to estimate the attenuation coefficients","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"134 1","pages":"536-544"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73962452","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}

{"title":"Discussion on: \"FDI Using Multiple Parity Vectors for Redundant Inertial Sensors\"","authors":"C. Chan","doi":"10.3166/ejc.12.450-454","DOIUrl":"https://doi.org/10.3166/ejc.12.450-454","url":null,"abstract":"In this paper, a fault detection and isolation technique based on the average of the parity vectors is presented. The parity vector sensitive only to specific faults is obtained first using existing methods [1,2]. A fault detection function defined as the average of q parity vectors obtained in previous time periods is then computed. Faulty sensors are accommodated or included in the estimation of the triad positions in the inertial navigation system (INS) if this function is less than a certain threshold. The main advantage of the proposed method is that it reduces the probability of false alarms and wrong isolations, and at the same time increases the probability of correct isolation, as more measurements are used in the estimating the triad positions. The accommodation threshold for fault detection is also derived based on the variance of the measurement noise of the sensors. The implementation and performance of the method are illustrated using simulation and experiments. It should be noted that the concept of fault accommodation introduced by the authors has a unique meaning. In the paper, fault accommodation is interpreted as whether or not to include a faulty sensor in the estimation of the triad positions of the INS, whilst other authors [3,4] are concerned also with the compensation of faults in faulty sensors in order to minimize their effect on the estimation of the triad positions. Another interesting result presented in the paper is that the triad positions of the INS, x(tk), obtained including faulty sensors having faults with a magnitude less than the accommodation threshold is more accurate than that obtained by excluding them. This inference comes from the result that the variance of the estimated triad positions, ^ xðtkÞ, including the faulty sensors is smaller than that obtained without them. However, it should be noted that ^ xtkÞ obtained by including faulty sensors has a bias of ðH T HÞ � 1 H T VFi fðtkÞ, as given by (7) in the paper,","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"22 1","pages":"450-454"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89459735","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}

{"title":"Discussion on: \"Transfer Functions and Statistical Analysis of FDLCP Systems Described by Higher-order Differential Equations\"","authors":"T. Hagiwara","doi":"10.3166/ejc.12.574-576","DOIUrl":"https://doi.org/10.3166/ejc.12.574-576","url":null,"abstract":"","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"98 1","pages":"574-576"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76075701","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}

{"title":"Discussion on: \"Adaptive Variable Structure Maneuvering Control and Vibration Reduction of Three-axis Stabilized Flexible Spacecraft\"","authors":"S. Gennaro, Xing-gang Yan","doi":"10.3166/ejc.12.669-672","DOIUrl":"https://doi.org/10.3166/ejc.12.669-672","url":null,"abstract":"with ∆A, ∆B uncertainty matrices, A, B, C the nominal matrices, Φ(u) a nonlinear continuous function, x, u, y the state, input and output of the system, and f ∈ R a disturbance. The design is based on the adaption of the bounds on the uncertainty matrices and the disturbance, through the application of Barbalat lemma, as common in adaptive control. The theoretical results are then applied to the attitude control of flexible spacecraft subject to external disturbances. The subject of the paper is of interest in attitude control of flexible structures. Many contributions can be found in the literature. In fact, in the last decades the research effort has been focused on the nonlinear nature of the spacecraft model, and various works are available either in for rigid [10, 17, 24, 2] or flexible spacecraft [18, 20, 21, 22, 1, 12, 14], also in the digital setting [19, 9]. The robustness of these nonlinear controllers has been one of the main issues addressed [23, 11, 13]. In this perspective, the present paper raises some perplexities, both for the theoretical and the application contributions. In the remaining of this discussion some observations, which can be considered as issues for further research activities, are illustrated. The authors assume that the uncertainties ∆A, ∆B and the disturbance f are matched by the input","PeriodicalId":11813,"journal":{"name":"Eur. J. Control","volume":"25 1","pages":"669-672"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91279386","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}