A model based controller design approach for the TCV tokamak

2002 ◽  
Author(s):  
G. Ambrosino ◽  
M. Ariola ◽  
A. Pironti ◽  
J.B. Lister ◽  
P. Vyas
Keyword(s):  
Controller Design ◽  
Design Approach ◽  
Model Based

scholarly journals Systematic Controller Design Methodology for Variable-Speed Wind Turbines

2000 ◽  
Vol 24 (3) ◽  
pp. 169-187 ◽  
Author(s):  
M. Maureen Hand ◽  
Mark J. Balas
Keyword(s):  
Linear Model ◽  
Wind Turbines ◽  
Controller Design ◽  
Design Approach ◽  
Systematic Design ◽  
Variable Speed ◽  
Point Selection ◽  
Model Based ◽  
Non Linear ◽  
Linearization Point

Variable-speed, horizontal axis wind turbines use blade-pitch control to meet specified objectives for three regions of operation. This paper provides a guide for controller design for the constant power production regime. A simple, rigid, non-linear turbine model was used to systematically perform trade-off studies between two performance metrics. Minimization of both the deviation of the rotor speed from the desired speed and the motion of the actuator is desired. The robust nature of the proportional-integral-derivative controller is illustrated, and optimal operating conditions are determined. Because numerous simulation runs may be completed in a short time, the relationship between the two opposing metrics is easily visualized. Traditional controller design generally consists of linearizing a model about an operating point. This step was taken for two different operating points, and the systematic design approach was used. The surfaces generated by the systematic design approach using the two linear models are similar to those generated using the non-linear model. The gain values selected using either linear model-based design are similar to those selected using the non-linear model-based design. The linearization point selection does, however, affect the turbine performance. Inclusion of complex dynamics in the simulation may exacerbate the small differences evident in this study. Thus, knowledge of the design variation due to linearization point selection is important.

scholarly journals Towards Automatic Model Based Controller Design for Reconfigurable Plants

2008 ◽  
Vol 41 (2) ◽  
pp. 342-346 ◽  
Author(s):  
Axel G. Michelsen ◽  
Roozbeh Izadi-Zamanabadi ◽  
Jakob Stoustrup
Keyword(s):  
Controller Design ◽  
Model Based

From Conception to Implementation: A Model Based Design Approach

2004 ◽  
Vol 37 (22) ◽  
pp. 29-34 ◽  
Author(s):  
Giovanni Gaviani ◽  
Giacomo Gentile ◽  
Giovanni Stara ◽  
Luigi Romagnoli ◽  
Thomas Thomsen ◽  
...  
Keyword(s):  
Design Approach ◽  
Model Based

scholarly journals A Model-Based Control Design Approach for Linear Free-Piston Engines

2017 ◽  
Vol 139 (11) ◽  
Author(s):  
T. N. Kigezi ◽  
J. F. Dunne
Keyword(s):  
Control Design ◽  
Linear Quadratic Regulator ◽  
Design Approach ◽  
Linear Quadratic ◽  
Free Piston ◽  
Model Based Control ◽  
Model Based ◽  
Bottom Dead Center ◽  
Free Piston Engine ◽  
Advanced Control

A general design approach is presented for model-based control of piston position in a free-piston engine (FPE). The proposed approach controls either “bottom-dead-center” (BDC) or “top-dead-center” (TDC) position. The key advantage of the approach is that it facilitates controller parameter selection, by the way of deriving parameter combinations that yield both stable BDC and stable TDC. Driving the piston motion toward a target compression ratio is, therefore, achieved with sound engineering insight, consequently allowing repeatable engine cycles for steady power output. The adopted control design approach is based on linear control-oriented models derived from exploitation of energy conservation principles in a two-stroke engine cycle. Two controllers are developed: A proportional integral (PI) controller with an associated stability condition expressed in terms of controller parameters, and a linear quadratic regulator (LQR) to demonstrate a framework for advanced control design where needed. A detailed analysis is undertaken on two FPE case studies differing only by rebound device type, reporting simulation results for both PI and LQR control. The applicability of the proposed methodology to other common FPE configurations is examined to demonstrate its generality.

Control-oriented modeling for the electrodynamic levitation with permanent magnet Halbach array

2021 ◽  
pp. 1-19
Author(s):  
Yongpan Hu ◽  
Zhiqiang Long ◽  
Yunsong Xu ◽  
Zhiqiang Wang
Keyword(s):  
Permanent Magnet ◽  
Controller Design ◽  
Levitation Force ◽  
Model Based ◽  
Halbach Array ◽  
Validation Experiment ◽  
Electromagnetic Models ◽  
Two Stages ◽  
Poor Stability ◽  
Maximum Minimum

Poor stability of the permanent magnet electrodynamic levitation hinders its application in the maglev field. Therefore, building a control-oriented model to improve its stability is most challenging. However, intractable electromagnetic models leading to an implicit relationship between levitation force and gap, yields a barrier for model-based controller design. To solve the above-mentioned problem, this paper develops a control-oriented model by two stages. Specifically, the first stage is to show an explicit formula of the levitation force with regard to the levitation gap by neglecting end effect; meanwhile the “maximum–minimum rectification” method is put forward to evaluating an accurate levitation force. The second stage is to bring forth the control-oriented model on basis of the estimated levitation force. Although the paper focus mainly on the development of the control-oriented model, an example of PD controller is provided to verify its validation. Experiment results demonstrate the estimated levitation force is highly consistent with the real one. Simulation results show that the control-oriented model is sufficiently reliable. The research bridges the gap between the physical model and the model-based controller for the electrodynamic levitation with permanent magnet Halbach array.

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