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1994 Proceedings of IEEE International Conference on Control and Applications

24-26 Aug. 1994

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Displaying Results 1 - 25 of 319
  • Vulcanization process: a stochastic method for identification and control problem

    Publication Year: 1994, Page(s):533 - 535 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    This paper deals with the coupling of deterministic and stochastic methods in order to solve identification and control problems arising in the industrial process of vulcanization. Elastomers and rubber composite materials are used in many high technology industries and a severe control of their mechanical and thermal properties must be exerted. These properties are closely connected to the curing... View full abstract»

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  • Proceedings of IEEE International Conference on Control and Applications

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (466 KB)
    Freely Available from IEEE
  • On the robust control of robot manipulators including actuator dynamics

    Publication Year: 1994, Page(s):559 - 564 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    A simple robust nonlinear control law that incorporates the manipulator dynamics as well as dynamics of actuators is developed in this paper. The inertial parameters of the manipulator and the electrical parameters of the actuators are considered to be of uncertain values. In contrast to the known methods, the presented design procedure is based on less restrictive assumptions regarding to the cha... View full abstract»

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  • Industrial applications of predictive functional control to rolling mill, fast robot, river dam

    Publication Year: 1994, Page(s):1643 - 1655 vol.3
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    After a brief presentation of predictive functional control (PFC), three applications are described: 1) thickness control of a cold rolling mill; 2) water level control of the Rhone river; and 3) position control of a fast robot. The paper focuses on how to implement PFC and what can be expected from this technology View full abstract»

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  • A new control method applied to robots with joint elasticity

    Publication Year: 1994, Page(s):565 - 570 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    This paper presents an application example of a novel disturbance-rejection control method. The example considers a flexible-joint robot where actuator dynamics is not ignored. After a review and a discussion of the state of art in controling flexible-joint robots, the novel method is derived for the general case and then applied to the considered example. The key feature of this method is to tran... View full abstract»

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  • Robust control design for a spaceborne telescope guidance system

    Publication Year: 1994, Page(s):1591 - 1594 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Robust control approach is applied to a system with a constant dynamics factor and a variable matrix of rigid cross-links R(γ): high-precision guidance system for a telescope, mounted at a satellite hull. Region of possible operation regime Γ is dissected into a number of subregions {Γn}, each of those is described by a nominal cross-links matrix R an... View full abstract»

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  • Signal detection using a hybrid system model

    Publication Year: 1994, Page(s):1829 - 1834 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The hybrid system is an extension of the state-space system model which allows for random and abrupt changes in the model parameters. It has been used in the control and estimation literature to model a number of phenomena including subsystem failures, piecewise approximations for nonlinear systems, and target maneuverability. This paper describes a novel application of the hybrid system to the fi... View full abstract»

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  • Adaptive sliding mode control of manipulator tracking an unknown surface

    Publication Year: 1994, Page(s):571 - 572 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    Concerns the problems of trajectory/force control for constrained manipulators. Several adaptive control schemes have been adopted for constrained manipulators tracking known surface. However, exact knowledge about constrained surface is not always available that causes the necessity to study the problem of robot tracking on unknown surface. Under the assumption of perfect knowledge of robot param... View full abstract»

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  • Application of generalized predictive control to a solar power plant

    Publication Year: 1994, Page(s):1657 - 1662 vol.3
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This paper presents an application of generalized predictive controllers to the distributed collector field of a solar power plant. Two control algorithms are proposed, one based on a gain scheduling algorithm and the other on a nonlinear prediction of the free response. The results obtained at the plant are shown View full abstract»

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  • Enhancing hydrostatic gear efficiency through nonlinear optimal control strategies

    Publication Year: 1994, Page(s):403 - 408 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Energy efficiency is a common control goal for many applications, especially in vehicles or ships. This goal stands usually in contradiction with another common goal, fast response. In the case of hydrostatic gears, two basic system configurations are used, which allow better efficiency-the primary control setup-or faster responses-the secondary control. In this paper, (1) a different control setu... View full abstract»

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  • Comparison of different methods of bilinear time series prediction

    Publication Year: 1994, Page(s):1835 - 1839 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Prediction has applications in time series analysis, feedforward control, and many other situations in which knowledge of the future behavior of process is desired. Algorithm of prediction results from a model of process or phenomenon. In this paper minimum variance bilinear predictor for the general form of bilinear time series model is considered. Bilinear predictor is compared with neural netwo... View full abstract»

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  • Non-linear control of a flight simulator motion system

    Publication Year: 1994, Page(s):365 - 370 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    This paper describes work towards a non-linear multivariable controller for a flight simulator motion system. Significant performance improvements are expected over current industrial practice as a consequence of the following controller features: a compensation technique using non-linear pressure feedback to linearise the response of the electrohydraulic actuators; compensation for the main non-l... View full abstract»

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  • Robot controller specification using SART approach

    Publication Year: 1994, Page(s):303 - 308 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The SART (Structured Analysis Real Time) specification method is considered to allow a more detailed and rigorous analysis of robot controller specification. A comparison is first developed between block diagrams and SART stream diagrams in the basic example of a joint control loop. Then the SART approach is applied to the two fundamentals levels of the robot controller: joint control and trajecto... View full abstract»

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  • A MISO sliding mode control for a high speed EMS MAGLEV-vehicle using disturbance estimation

    Publication Year: 1994, Page(s):587 - 592 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The levitation system of high speed electromagnetic system (EMS) MAGLEV-vehicles has been successfully controlled by sliding mode control (SMC). This nonlinear control method is robust with respect to parameter variations and force disturbances but fails to compensate guideway disturbances just like linear controllers. To maintain the desired robustness and minimize the effect of guideway disturba... View full abstract»

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  • New predictive techniques: control axis solutions

    Publication Year: 1994, Page(s):1663 - 1668 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Improving performances of machine-tools can be achieved with predictive control laws instead of classical PID controllers. Previous studies dealing with generalized predictive control (GPC) have proved that a better efficiency is possible, coupled to a simple implementation due to autotuning procedures. But the limitations of these techniques may be reached with strong specifications of very high ... View full abstract»

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  • An integrated robust/neural controller with gas turbine applications

    Publication Year: 1994, Page(s):411 - 415 vol.1
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Two considerations are presented for the design of a nonlinear gas turbine controller, the rejection of unknown nonlinear disturbances and the change of parameters in the approximate turbine model (regarding different engine operating points). The fixed robust linear controller is enhanced by the nonlinear control signal of neural networks to obtain the performance robustness View full abstract»

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  • Optimal indoor temperature control with the use of a predictor

    Publication Year: 1994, Page(s):1843 - 1848 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This article deals with optimal control of the indoor temperature in a building. The control system tries to find an economic optimum to supply heat to the building with the use of a predictor for the indoor temperature, while maintaining a comfortable temperature in the building. A general control structure is described that uses a linear objective function, which is minimized by linear programmi... View full abstract»

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  • Design of a robust controller for a grinding system

    Publication Year: 1994, Page(s):1579 - 1584 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    In designing a compensator for a robust force controlled grinding system several constraints must be considered. It is critical that the grinding force is decoupled from the feed velocity of the system. Therefore, two separate control loops are designed, a feed velocity loop and a force loop. Besides decoupling the force and velocity, a variety of other system performance specifications must be ac... View full abstract»

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  • An example of multivariable combustion, control design within individual channel design framework

    Publication Year: 1994, Page(s):741 - 746 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    In this paper an approach to multivariable combustion control design within the individual channel design (ICD) framework for analysis and control design is presented. ICD is a framework which involves an interplay between customer specification, uncertain plant characteristics, and the multivariable feedback design itself. Established multivariable methods and process engineering knowledge can ei... View full abstract»

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  • Nonlinear feedback and robust tracking control of articulated vehicles

    Publication Year: 1994, Page(s):373 - 378 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    In this paper, firstly, the nonlinear system equations including explicit output equations which describe the articulated vehicles with double trailers are given, nonlinear feedback and diffeomorphic transformation techniques based on differential geometry theory are then applied to totally linearize the nonlinear model. Finally, the PD controller and variable structure compensator are designed fo... View full abstract»

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  • Nonlinear control of multidrive vehicular robots

    Publication Year: 1994, Page(s):79 - 80 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    In this paper a new approach to the path tracing of automatic vehicles is developed on the basis of modern nonlinear and multivariable control methods. The proposed control strategy and appropriate algorithms allow one to improve the operating performances of the vehicle as well as to solve problems caused by nontrivial arrangement of the drive wheel modules and complexity of the path prescribed View full abstract»

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  • Parallel processing systems for passive ranging during helicopter flight

    Publication Year: 1994, Page(s):107 - 112 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Images from an electro-optical sensor provide a covert way of detecting objects in the flight path of a low-flying helicopter. Passive ranging consists of processing a sequence of images using techniques based on optical flow computation and recursive estimation. The passive ranging algorithm has to extract obstacle information from imagery at rates varying from five to thirty or more frames per s... View full abstract»

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  • Experimental results for a robust position and force controller implemented on a direct drive robot

    Publication Year: 1994, Page(s):309 - 314 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    In this paper we present the results obtained from the implementation of a robust position/force controller on a two-degree-of-freedom direct drive robot. The controller is based on the theoretical work presented by McClamroch et al. (1988) and Grabbe et al. (1993), which guarantees globally uniformly ultimately bounded (GUUB) position tracking error and bounded force tracking error. The controlle... View full abstract»

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  • Design and analysis of the nonlinear feedback linearizing controller for an EMS system

    Publication Year: 1994, Page(s):593 - 598 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The analysis and the implementation of nonlinear feedback linearization control of electro-magnetic suspension (EMS) system using DSP are presented. We show that an EMS system is nonlinear feedback linearizable and that the proposed nonlinear feedback controller for an EMS system is robust against mass parameter perturbation and constant force disturbance. Some tests were conducted for experimenta... View full abstract»

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  • A versatile visual inspection tool for the manufacturing process

    Publication Year: 1994, Page(s):1505 - 1510 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The dynamically changing nature and the complex behaviour of processes in manufacturing cells dictate the need for lean, agile and flexible manufacturing systems. This research describes a versatile, intelligent vision system capable of performing a variety of tasks for the manufacturing process. The key features of the system are reconfigurability, adaptation, and real-time performance. It is bas... View full abstract»

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