Lágy számítástudományi uniform módszer kifejlesztése komplex nemlineáris rendszerek globális stabilizálására = Development of a Uniform Softcomputing Based Concept for Global Stabilization of Complex Nonlinear Systems

Céloknak megfelelően: 1) A TP-modell transzformáció és az qLPV (nemlineáris) dinamikus modellek politopikus alakjának HOSVD alapú kanonikus formája és annak numerikus rekonstrukciója bizonyítással együtt elkészült. További konvex burok manipulációs eljáráscsalád is készült, és ennek irányításelméleti és tervezési létjogosultsága bizonyításra került. Az eredmények alapján a pályázat vezetője ERC IDEAS második fordulóba jutott (~9000 EU pályázatból az első 5%-ba került), az MTA értekezése is már magába foglal eredményeket. Az eredmények 13 folyóirat (impakt.f: 4.6) és 13 nemz.köz. konferencia közleményben jelentek meg (ezekre 20 független hiv). 2) Egy könyv készült az eredményekből, mely a CRC Press Taylor & Francis tudományos kiadó elfogadott publikálásra, továbbá egy jegyzet is megjelenés alatt van ISBN 963 421 415 0 3) Egy teljes MATLAB toolbox készült mérnöki alkalmazásokhoz, MATLAB weboldalon vagy a tptool.sztaki.hu oldalról letölthető (a toolboxot 743 különböző érdeklődő tekintette meg a honlapon 63 országból) 4) Nyári képzést tartott a témavezető más európai országból érkező doktoranduszoknak az eredményekről. Meghivott szemináriumot tartott az eredményekről Hong kong-ban és Japánban. 5) A külföldi kapcsolatok (Hong Kongi Kinai Egytem) közös pulikácókkal erősödtek. | According to the goals: 1)The numerical reconstruction of the TP model transformation and the HOSVD based canonical form of polytopic qLPV (non-linear) models with their proof were completed. A set of methods for convex hull manipulation was also developed. It was also proven that the convex hull manipulation is an important part of the system control design. Based on these results the PI of this project was selected into II round of the ERC IDEAS program (he was selected into the first 5% of 9000 EU applicants). His dissertation for D.Sc. degree also includes some of these results. The result were published in 13 journal papers (imp.f: 4.6) and in 13 int.conf. papers 20 independent citations. 2)The result are also introduced in a book that was accepted by the CRC Press Taylor & Francis Editor for publication. A University text book is also under edition: ISBN 963 421 415 0 3)A MTALAB toolbox was also completed for engineering use. It can be downloaded from MATLAB website or from tptool.sztaki.hu (734 independent visitor from 63 countries were registered on the websites) 4) The PI was giving a summer course for Ph.D. students from different European countries. He also gave invited seminars in Hong Kong and Japan. 5) The cooperation with the Chinese University of Hong Kong resulted further publications

Representing the model of impedance controlled robot interaction with feedback delay in polytopic LPV form: TP model transformation based approach

The aim of this paper is to transform the model of the impedance controlled robot interaction with feedback delay to a Tensor Product (TP) type polytopic LPV model whereupon Linear Matrix Inequality (LMI) based control design can be immediately executed. The paper proves that the impedance model can be exactly represented by a finite element TP type polytopic model under certain constrains. The paper also determines various further TP models with different advantages for control design. First, it derives the exact Higher Order Singular Value Decomposition (HOSVD) based canonical form, then it performs complexity trade-off to yield a model with less number of components but rather effective for LMI design. Then the paper presents various different types of convex TP model representations based on the non-exact model in order to investigate how convex hull manipulation can be performed on the model. Finally the presented models are analyzed to validate the accuracy of the transformation and the resulting TP type polytopic LPV models. The paper concludes that these prepared models are ready for convex hull manipulation and LMI based control design

Friction compensation in TP model form - Aeroelastic wing as an example system

The aim of this paper is to fit the friction compensation problem in the field of modern polytopic and Linear Matrix Inequality (LMI) based control design methodologies. The paper proves that the exact Tensor Product (TP) type polytopic representations of most commonly utilized friction models such as Coulomb, Stribeck and LuGre exist. The paper also determines and evaluates these TP models via a TP model transformation. The conceptual use of the TP model of the friction is demonstrated via a complex control design problem of a 2D aeroelastic wing section. The paper shows how the friction model and the model of the aeroelastic wing section can be merged and transformed to a TP type polytopic model - by TP model transformation - whereupon LMI based control performance optimization can immediately be executed to yield an observer based output feedback control solution to given specifications. The example is evaluated via numerical simulations. © 2015, Budapest Tech Polytechnical Institution. All rights reserved

Transition Between TS Fuzzy Models and the Associated Convex Hulls by TS Fuzzy Model Transformation

One of the primary objectives underlying the extensive 20-year development of the TS Fuzzy model transformation (originally known as TP model transformation) is to establish a framework capable of generating alternative Fuzzy rules for a given TS Fuzzy model, thereby manipulating the associated convex hull to enhance further design outcomes. The existing methods integrated into the TS Fuzzy model transformation offer limited capabilities in deriving only a few types of loose and tight convex hulls. In this article, we propose a radically new approach that enables the derivation of an infinite number of alternative Fuzzy rules and, hence, convex hulls in a systematic and tractable manner. The article encompasses the following key novelties. Firstly, we develop a Fuzzy rule interpolation method, based on the pseudo TS Fuzzy model transformation and the antecedent Fuzzy set rescheduling technique, that leads to a smooth transition between the Fuzzy rules and the corresponding convex hulls. Then, we extend the proposed concept with the antecedent Fuzzy set refinement and reinforcement technique to tackle large-scale problems characterized by a high number of inputs and Fuzzy rules. The paper also includes demonstrative examples to illustrate the theoretical key steps, and concludes with an examination of a real complex engineering problem to showcase the effectiveness and straightforward execution of the proposed convex hull manipulation approach

The International Division of Labor in Economists' Field: Academic Subordination in Exchange for Political Prerogatives in Argentina

Since the 1970s, economics has emerged as a global profession, with economists becoming main characters of the intellectual and political life in many countries. Inspired by Bourdieu, several analyses faced the challenge of “theorizing fields beyond the nation-state” (Buchholz 2016). Some scholars emphasized that internationalization entailed a growing asymmetry between dominant and dominated participants: the former acting as “exporters” and the latter as “importers” of ideas (Dezalay and Garth 2002). Others pointed out the process of “creative destruction” that accompanied the globalization of local fields (Fourcade 2006). Finally, still others noted the emergence of a new field of globalized experts and think tanks (Medvetz 2012). Through a socio-historical depiction of economists in Argentina, we problematize the subordinated role of peripheral economists. Rather than a dominant-dominated logic, we identify a new international division of labor. Based on more than 60 interviews with economists, archival research, and statistical analyses, this paper shows that while a dependent position in the global academic field reduced Argentinian economists’ theoretical autonomy, it gave them the scientific authority that in turn paved the road to access very well-paid work as consultants and high-level public servants