JAMES H TAYLOR | The University of New Brunswick (original) (raw)

Papers by JAMES H TAYLOR

IEEE Control Systems Society Workshop on Computer-Aided Control System Design, 2000

This paper presents the User Interface (UI) of the MEADt Computer Aided Control Engineering (CACE... more This paper presents the User Interface (UI) of the MEADt Computer Aided Control Engineering (CACE) program. After a brief presentation of the MEAD computer program, the unifying philosophy behind the MEAD U1 is discussed. Main features of this U1 include a "pointand-click'' style interaction, a unifying grouping of similar functionality, and a graphical interface to its CACE data-base management system. A typical modeling, analysis and design scenario illustrates the interface. The use of a User Interface Management System (UIMS) in the design and implementation of the MEAD U1 is thereafter discussed. The MEAD user interface. is implemented using an experimental UIMS developed at GE which supports both Tektronixa terminal and X window based window systems. Some implementational features of the MEAD user interface are: i t is implemented using an object oriented database system, it uses a state tree to specify the dialog control, and it is created entirely by means of a graphical editor thereby avoiding conventional programming. The architecture of the UIMS is described and the implications of creating a user interface with this UIMS are discussed.

Proceedings of the IEEE National Aerospace and Electronics Conference, 1989

Physical system modeling, whether automated or manual, requires a systematic procedure to choose ... more Physical system modeling, whether automated or manual, requires a systematic procedure to choose the appropriate order of a system model. This can be most readily accomplished by determining the appropriate order of the component submodels. With previous schemes, the primary means to determine the required order of component submodels has been to focus on the eigenvalues of the model, speci cally, the behavior of the eigenvalues inside of a circle in the complex plane de ning a given spectral radius. In this paper we develop a new algorithm, fd-moda, that uses changes in a model's frequency response as an algorithm-stopping-criterion. The model's frequency response provides a more comprehensive indication of model performance and adequacy than just the eigenvalues, and is more meaningful in the context of frequency-domain controller design methods.

1993 American Control Conference, Jun 2, 1993

IEEE Control Systems Society Workshop on Computer-Aided Control System Design, 1989

The GE MEAD Project (Multi-disciplinary Expert-aided Analysis and Designs) involves the integrati... more The GE MEAD Project (Multi-disciplinary Expert-aided Analysis and Designs) involves the integration of several computer-aided control engineering (CACE) packages under a supervisor which coordinates the execution of these packages with a data-base manager, an expert system, and an advanced user interface. The principal components are, in functional terms: a supervisor, which integrates the underlying CACE packages and coordinates all activity within the GE MEAD Computer Program (GMCP), an expert system shell and rule bases for "expert aiding" specific procedures to relieve the user from unnecessary low-level detail, a data-base manager to track system models that evolve over time along with associated results, and a user interface, to facilitate access to the CACE package capabilities by permitting the user to work in several modalities, i.e., menu/foxms style, using GE MEAD commands, using the core packages' native commands, or using the GE MEAD Macro Facility.

Proceedings of the 1999 American Control Conference (Cat. No. 99CH36251), 1999

26th IEEE Conference on Decision and Control, 1987

In this paper, we report on recent advances in the design of fully nonlinear controllers for ampl... more In this paper, we report on recent advances in the design of fully nonlinear controllers for amplitude-sensitive nonlinear plants using sinusoidal-input describing function methods. This work includes the development of a new nonlinear controller synthesis approach that includes derivative action in an inner-loop feedback path (nonlinear rate feedback), and its application to a motor + load model with torque saturation and stiction. This approach is capable of treating nonlinear systems of a very general nature, with no restrictions as to system order, number of nonlinearities, configuration, or nonlinearity type; additionally, the techniques can be generalized for the design of nonlinear controllers of different structures. The end result is a closed-loop nonlinear control system that is relatively insensitive to referenceinput amplitude.

Conference on Decision and Control, 1996

A method for online application of optimal reactive power dispatch based on total energy loss min... more A method for online application of optimal reactive power dispatch based on total energy loss minimization (ELM) is presented. In this approach the total energy loss from the present instant over the next hour is minimized. The method uses the load forecast during this period. All the continuous and discrete control variables are adjusted on an hourly basis. During the

2007 Mediterranean Conference on Control & Automation, 2007

The nonlinear dynamic behavior of a helicopter is considered in this paper, using only real-time ... more The nonlinear dynamic behavior of a helicopter is considered in this paper, using only real-time flight data analysis. The main objective of this study is to characterize the vibration mechanism(s), based on the analysis of the time-series data of the dynamical system, specifically acceleration for two different airspeeds with a sampling rate of 1024 Hz.

There has been substantial recent progress in the development of software for computer-aided cont... more There has been substantial recent progress in the development of software for computer-aided control engineering. This includes both "conventional" software as well as environments based on the use of expert systems. One major area has not received much attention until very recenty: data-base management. In this paper, we define a framework for database management, describe a set of design assumptions and corresponding functional requirements, and describe several roles that an expert system can play in this activity.

The classical model predictive control ( MPC) approach is extended to handle uncertainty in the v... more The classical model predictive control ( MPC) approach is extended to handle uncertainty in the variable delay time problem by developing a Smart Delay-time Predictor ap- proach. This new approach builds on the variable delay time estimator technique applied to time-variable flow processe s. The present work has improved the approach proposed by Sayda and Taylor (1) in one important respect: the time delay prediction method presented here eliminates the adverse transient spikes that occurred due to uncertainty i n the variable time delay, i.e., it removes unwanted transien ts caused by miscalculation of the forced response inside the controller. The efficacy and robustness of this technique is demonstrated by controlling a pulp bleaching process using a model predictive control algorithm with a variable delay- time estimator embedded in that controller.

SIAM Journal on Applied Mathematics, 1970

SIAM Journal on Applied Mathematics, 1969