{"title":"Robust decoupled controller design with quantitative feedback theory","authors":"Jin-Chuan Chang, Yeong-Hwa Chang, Li-Wei Chen","doi":"10.1109/ACC.1998.703081","DOIUrl":"https://doi.org/10.1109/ACC.1998.703081","url":null,"abstract":"We present a robust decoupled controller design method for MIMO systems by combining the Perron-Frobenius theory, Ostrowski's theorem and quantitative feedback theory. Our aim is to find a required robust controller with less complexity such that the required performances are achieved. An example is given to illustrate the feasibility of the proposed method.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129532913","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":"Further experimental results on nonlinear control of flexible joint manipulators","authors":"B. Brogliato, D. Rey","doi":"10.1109/ACC.1998.703019","DOIUrl":"https://doi.org/10.1109/ACC.1998.703019","url":null,"abstract":"We focus on the experimental comparison of feedback controllers for flexible joint manipulators. It completes a previous set of experimental results presented by Brogliato et al. (1998), on a 2 degree-of-freedom (DOF) manipulator with a stiff second joint (50 Nm/rad). The process considered is quite different since it consists of a 1-DOF flexible joint manipulator (i.e. a 4th order linear system) with a high flexibility (3.4 Nm/rad). The main goal of the present work is to apply a systematic way of tuning the gains of backstepping- and energy shaping-like controllers, using a method developed for LQ controllers by De Larminat. It is shown that although other linear controllers could be applied to the process tested in this paper, we restrict ourselves to those control laws that extend to the nonlinear general case of flexible joint manipulators, and yield global stability results.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129917444","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":"A governing equation based fault detection and diagnosis algorithm and its application in a chemical plant","authors":"Jie Zhang, Suzhen Zhang, N. Thornhill","doi":"10.1109/ACC.1998.703079","DOIUrl":"https://doi.org/10.1109/ACC.1998.703079","url":null,"abstract":"This paper describes a governing equation fault detection and diagnosis algorithm, which is based on Kramer's (1987) approach and extended it to deal with multiple faults. The algorithm is specifically designed to overcome disturbances and uncertainties in the process which might result in diagnostic instability. The approach is used to detect and/or diagnose the following faults: sensor faulty status of fails-high and fails-low, sticking valve, plant leaks, and other unanticipated or novel faults. The algorithm was installed on a distributed control system of a PET plant in Dec. 1995, and continues to be used thus demonstrating the success of the fault detection and diagnosis approach.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130496313","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":"Control of LPV systems using a quasi-piecewise affine parameter-dependent Lyapunov function","authors":"Sungyung Lim, J. How","doi":"10.1109/ACC.1998.703604","DOIUrl":"https://doi.org/10.1109/ACC.1998.703604","url":null,"abstract":"This paper presents a new finite-dimensional linear matrix inequality (LMI) formulation for the induced L/sub 2/-norm synthesis of linear parameter-varying (LPV) systems. The approach is based on a nonsmooth dissipative systems theory using a continuous, quasi-piecewise affine parameter-dependent Lyapunov function. The new method is less conservative than previously published techniques based on either affine parameter-dependent Lyapunov functions or robust control techniques. Conservatism is reduced with this new approach because the synthesis uses a very general class of parameter-dependent Lyapunov functions. In contrast to the gridding approach typically used to develop a computationally feasible algorithm, this proposed approach guarantees the synthesis result. We show that the numerical results using our approach, while computationally intensive, can be used to develop many new insights into the potential conservatism of various classes of Lyapunov functions for LPV systems.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126823350","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":"Hybrid power systems with diesel and wind turbine generation","authors":"J. Bialasiewicz, E. Muljadi, S. Drouilhet, G. Nix","doi":"10.1109/ACC.1998.707297","DOIUrl":"https://doi.org/10.1109/ACC.1998.707297","url":null,"abstract":"We present a modular simulation system developed to study the dynamics and to aid in the design of hybrid power systems with diesel and wind turbine generation. The emphasis is placed on the representation of the dynamics of the elements of a real system and on the control aspects of the modules. Each module represents a component of the hybrid power system such as the diesel generator, wind turbine generator, village load, etc. Various system configurations with different load and wind resource profiles can be simulated. This tool can be used to study the transient and the steady-state interaction of the various components of a hybrid system. It is especially useful when a new configuration of a power system is to be analyzed, a new load or wind speed profile has to be included, additional modules have been installed in an existing power system, or an old control strategy is to be replaced by a new one.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129122602","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":"Open-loop and feedback bounded control in linear systems","authors":"S. Mikhailov","doi":"10.1109/ACC.1998.707071","DOIUrl":"https://doi.org/10.1109/ACC.1998.707071","url":null,"abstract":"The classical PID regulators technique gives infinite control time duration and the constraints usually imposed on control do not take into consideration. The saturating linear feedback (SLF) meets the imposed control constraints but the control time is also infinite and the known difficulties restrict implementation of SLF. It is also known that the time-optimal bounded control steers the system to a terminal state in finite time. However, it is not easy to fabricate the switching surface if the dimension of the system is high. Therefore, in most applications, the time-optimal feedback has not been used. We attempt to design a nonlinear bounded feedback that gives the finite control time duration and is not complicated. This technique provides the control with the following properties: the control is presented in closed-loop form, can be calculated online, and meet the imposed constraints; the control is, to some degree, suboptimal and robust. An example is given to illustrate the proposed control technique.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"128 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130683129","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":"Nonlinear observer design with unknown nonlinearity via B-spline network approach","authors":"H. Zhang, C. Chan, K. Cheung, H. Jin","doi":"10.1109/ACC.1998.703049","DOIUrl":"https://doi.org/10.1109/ACC.1998.703049","url":null,"abstract":"A novel approach is proposed to the state estimation of a class of nonlinear systems which consist of known linear part and unknown nonlinear part. A linear observer is first designed then a nonlinear compensation term in the nonlinear observer is determined using the proposed \"deconvolution method\". The B-spline neural network is used to model the estimated compensation term. Three simulation examples are given to compare the effectiveness of the proposed approach and some analytical approaches.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"769 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123889084","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":"Closed-loop model validation; an application to an unstable experimental system","authors":"Li Chen, R. Smith","doi":"10.1109/ACC.1998.694744","DOIUrl":"https://doi.org/10.1109/ACC.1998.694744","url":null,"abstract":"Presents a model validation technique based on closed-loop, sampled, experimental data, which is applicable to open-loop unstable systems. Closed-loop probing signals are used to generate the I/O information for the stabilized system. Sampled measurements are then taken to check the validity of the open-loop unstable system model. A general closed-loop model validation test is derived by applying the lifting theory on the hybrid system at the sampling period. Sufficient conditions are also derived using decimated data sets to alleviate the computation problem. Application to an inverted pendulum experimental system is illustrated.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123985976","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":"A computational linearization principle for observability of nonlinear DAEs near a trajectory","authors":"W. J. Terrell","doi":"10.1109/ACC.1998.703087","DOIUrl":"https://doi.org/10.1109/ACC.1998.703087","url":null,"abstract":"We establish a result on local observability of nonlinear implicit differential systems near a reference trajectory. Observability of the time varying linearization along the trajectory implies local observability for the full system in a neighborhood of the trajectory. The conditions for local observability are verifiable by symbolic and numerical linear algebra, and provide a link with existing results on observability for implicit systems.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"63 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123500998","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":"Robust tracking for high-rise/high-speed elevators","authors":"Jing Li, D. Niemann, H.O. Wang","doi":"10.1109/ACC.1998.703235","DOIUrl":"https://doi.org/10.1109/ACC.1998.703235","url":null,"abstract":"This paper discusses the design of vertical motion control systems for high-rise/high-speed elevators. Two main performance requirements, tracking and releveling, are incorporated into the framework of an output regulation problem. By doing this, we design a single controller which satisfies both performance objectives. This design procedure is based on a local linear model of the elevator dynamics. Since the elevator dynamics change as a function of hoistway position, we utilize the concept of PDC (parallel distributed compensation) to generate a gain-scheduled controller which works for all floors. Simulation results have shown that the performance of this controller is also robust to the anticipated range of parameter uncertainty within the system.","PeriodicalId":364267,"journal":{"name":"Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207)","volume":"27 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120999576","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}