The Experts below are selected from a list of 213 Experts worldwide ranked by ideXlab platform
Daniel J. Burns - One of the best experts on this subject based on the ideXlab platform.
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A Proportional integral extremum-seeking control approach for discrete-time nonlinear systems
International Journal of Control, 2016Co-Authors: Martin Guay, Daniel J. BurnsAbstract:ABSTRACTThis paper proposes a Proportional-integral extremum-seeking control technique for a class of discrete-time nonlinear dynamical systems with unknown dynamics. The technique is a generalisation of existing time-varying extremum-seeking control (ESC) techniques that provides fast transient performance of the closed-loop system to the optimum equilibrium of a measured objective function. The main contribution of the proposed technique is the addition of a Proportional Action that can be used to minimise the impact of a time-scale separation on the transient performance of the ESC system. The integral Action fulfils the role of standard ESC techniques to identify optimal equilibrium conditions. The effectiveness of the proposed approach is demonstrated using a simulation example.
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CDC - A Proportional integral extremum-seeking control approach for discrete-time nonlinear systems
2015 54th IEEE Conference on Decision and Control (CDC), 2015Co-Authors: Martin Guay, Daniel J. BurnsAbstract:This paper proposes a Proportional-integral extremum-seeking control technique for a class of discrete-time nonlinear dynamical systems with unknown dynamics. The technique is a generalization of existing time-varying extremum-seeking control techniques that provides fast transient performance of the closed-loop system to the optimum equilibrium of a measured objective function. The main contribution of the proposed technique is the addition of a Proportional Action that can be used to minimize the impact of a time-scale separation on the transient performance of the extremum-seeking control system. The integral Action fulfills the role of standard ESC techniques to identify optimal equilibrium conditions. The effectiveness of the proposed approach is demonstrated using a simulation example.
Martin Guay - One of the best experts on this subject based on the ideXlab platform.
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A Proportional integral extremum-seeking control approach for discrete-time nonlinear systems
International Journal of Control, 2016Co-Authors: Martin Guay, Daniel J. BurnsAbstract:ABSTRACTThis paper proposes a Proportional-integral extremum-seeking control technique for a class of discrete-time nonlinear dynamical systems with unknown dynamics. The technique is a generalisation of existing time-varying extremum-seeking control (ESC) techniques that provides fast transient performance of the closed-loop system to the optimum equilibrium of a measured objective function. The main contribution of the proposed technique is the addition of a Proportional Action that can be used to minimise the impact of a time-scale separation on the transient performance of the ESC system. The integral Action fulfils the role of standard ESC techniques to identify optimal equilibrium conditions. The effectiveness of the proposed approach is demonstrated using a simulation example.
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CDC - A Proportional integral extremum-seeking control approach for discrete-time nonlinear systems
2015 54th IEEE Conference on Decision and Control (CDC), 2015Co-Authors: Martin Guay, Daniel J. BurnsAbstract:This paper proposes a Proportional-integral extremum-seeking control technique for a class of discrete-time nonlinear dynamical systems with unknown dynamics. The technique is a generalization of existing time-varying extremum-seeking control techniques that provides fast transient performance of the closed-loop system to the optimum equilibrium of a measured objective function. The main contribution of the proposed technique is the addition of a Proportional Action that can be used to minimize the impact of a time-scale separation on the transient performance of the extremum-seeking control system. The integral Action fulfills the role of standard ESC techniques to identify optimal equilibrium conditions. The effectiveness of the proposed approach is demonstrated using a simulation example.
P.r. Krishnaswamy - One of the best experts on this subject based on the ideXlab platform.
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Set point weighting for simplified model predictive control
The Chemical Engineering Journal, 1992Co-Authors: Gade Pandu Rangaiah, P.r. KrishnaswamyAbstract:Abstract Set point weighting (SPW) is a technique for achieving optimum performance of feedback control for both load and set point disturbances. It involves assigning a weighting factor to the set point in the Proportional Action part of the control algorithm. In this paper, simplified model predictive control (SMPC) is modified to include SPW. The modification consists of first tuning the SMPC controller for load disturbances and then optimizing the weighting factor for set point disturbances. The performance of the resulting feedback control system is studied through simulation and the results compared with those in the absence of SPW. In general, the results demonstrate that SPW offers significant benefits at practically no additional expense to digital control systems experiencing both load and set point variations.
Antonio Visioli - One of the best experts on this subject based on the ideXlab platform.
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Fuzzy logic based set-point weight tuning of PID controllers
IEEE Transactions on Systems Man and Cybernetics - Part A: Systems and Humans, 1999Co-Authors: Antonio VisioliAbstract:A methodology, based on fuzzy logic, for the tuning of Proportional-integral-derivative (PID) controllers is presented. A fuzzy inference system is adopted to determine the value of the weight that multiplies the set-point for the Proportional Action, based on the current output error and its time derivative. In this way, both the overshoot and the rise time in set-point following can be reduced. The values of the Proportional gain and the integral and derivative time constant are determined according to the well-known Ziegler-Nichols formula so that a good load disturbance attenuation is also assured. The methodology is shown to be effective for a large range of processes and is valuable for industrial settings since it is intuitive, it requires only a small extra computational effort, and it is robust with regard to parameter variations. The tuning of the parameters of the fuzzy module can be easily done by hand or by means of an autotuning procedure based on genetic algorithms.
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ID Tuning with Fuzzy Set-point
1998Co-Authors: Antonio Visioli, Giovanna FinzjAbstract:In this paper, a novel method, based on fuzzy logic, for the tuning of Proportional-IntegraI-Derivat~ve controllers is described. The m ain idea is to multiply the set-point for the Proportional Action by a parameter, which is determined in a fuzzy way, depending on the current value of the system error and its derivative. The values of the Proportional guan and the integral and derivative time constants are assigned according to the well-known Ziegler-Nichols formula. Thus, both a good load disturbance attenuation and a good step response can be achieved. Moreover, an autotuning procedure for the overall system can be implemented by means of genetic algorithms. Simulation results show the improvements obtained by this approach that can be carried out at the expense of a small extra computational effort and with a simple modification of the typical existing industrial setup.
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PID tuning with fuzzy set-point weighting
Proceedings of the 1998 IEEE International Conference on Control Applications (Cat. No.98CH36104), 1Co-Authors: Antonio Visioli, Giovanna FinziAbstract:A novel method based on fuzzy logic for the tuning of PID controllers is described. The main idea is to multiply the set-point for the Proportional Action by a parameter, which is determined in a fuzzy way, depending on the current value of the system error and its derivative. The valves of the Proportional gain and the integral and derivative time constants are assigned according to the well-known Ziegler-Nichols formula. Thus, both a good load disturbance attenuation and a good step response can be achieved. Moreover, an auto-tuning procedure for the overall system can be implemented by means of genetic algorithms. Simulation results show the improvements obtained by this approach that can be carried out at the expense of a small extra computational effort and with a simple modification of the typical existing industrial setup.
Lanyi Sun - One of the best experts on this subject based on the ideXlab platform.
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Design and control of a middle-vessel batch distillation for separating DMC–EMC–DEC mixture
Chinese Journal of Chemical Engineering, 2018Co-Authors: Minyan Zhu, Mengqi Chen, Hou Yafei, Lanyi SunAbstract:Abstract In this paper, the mixture of dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate was separated by middle-vessel batch distillation with feeding in middle-vessel and process control characteristics were researched. The steady state simulation results in Aspen Plus were exported to Aspen Dynamics. Then control effect of liquid level control with HighSelector, composition control (structure1, structure2) and temperature control (Proportional Action, Proportional integration Action) were proposed. Composition control structure 2 and temperature control with PI Action were investigated to achieve a good control effect.
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design and control of a middle vessel batch distillation for separating dmc emc dec mixture
Chinese Journal of Chemical Engineering, 2017Co-Authors: Minyan Zhu, Yafei Hou, Mengqi Chen, Lanyi SunAbstract:Abstract In this paper, the mixture of dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate was separated by middle-vessel batch distillation with feeding in middle-vessel and process control characteristics were researched. The steady state simulation results in Aspen Plus were exported to Aspen Dynamics. Then control effect of liquid level control with HighSelector, composition control (structure1, structure2) and temperature control (Proportional Action, Proportional integration Action) were proposed. Composition control structure 2 and temperature control with PI Action were investigated to achieve a good control effect.
