Advances in Control Theory and Applications: Selected papers from TOK 2013

Abstract

The Turkish National Committee of Automatic Control (TOK) is the National Member Organization (NMO) of IFAC in Turkey. The TOK meeting is a major national meeting on automatic control, which has been organized annually since 1994 with the aim of reporting on recent advances in control theory and applications in Turkey. The 15th TOK national meeting (TOK 2013) was held at Inonu University in Malatya, Turkey, on 26–28 September 2013. It was organized by Inonu University and Istanbul Technical University, and supported by TOK. All papers submitted to TOK 2013 were reviewed by three separate reviewers; 185 papers were accepted for oral presentation and 63 papers for poster presentation. The TOK 2013 technical programme consisted of 31 oral sessions (three being special sessions) and four poster sessions. The programme also included three plenary lectures, given by leading experts in the field – Professors Derek P. Atherton from the University of Sussex, UK, YangQuan Chen from the University of California, Merced, USA, and _ Ismail Yuksek from Yildiz Technical University, Turkey. A preconference workshop programme was organized on 25 September, with lectures presented by Professor Derek P. Atherton and Professor YangQuan Chen. All accepted papers for TOK 2013, which were written in Turkish, were screened for this special issue of the Transactions of the Institute of Measurement and Control. Eleven papers were selected and extended versions, written in English, were further reviewed by three different reviewers, whom we thank for their efforts. These papers constitute this special issue. ‘Design of a multiple-model switching controller for ABS braking dynamics’, by M. Dousti, S.C. Baslamisli, E. T. Onder and S. Solmaz: the purpose of this study is to design high-performance active braking control and observer algorithms for passenger vehicles equipped with electromechanical brake systems. These algorithms are designed to be adaptive with changing driving and road conditions in a switched multiple-model manner to ensure high performance and robustness. The effectiveness of a set of multiple-model switching lead-lag controllers is evaluated during transitions between different road friction coefficients. Meanwhile, a multiple-model switching observer algorithm is developed to estimate the shape of the tyre braking force curve with respect to the longitudinal slip. Each switched observer predicts signals according to its preset tyre model. The observers are designed based on different Burckhardt tyre models that are parameterized for different road conditions. In the simulations, the value of the friction coefficient is assumed to be unknown and our switching algorithms are observed to estimate successfully the varying friction coefficients by comparing a quadratic cost function of measured signals from the vehicle with signals generated by observers. It is demonstrated that the proposed algorithms provide high reliability and fast response, thus ensuring a stopping distance close to the theoretical minimum. ‘Receding horizon HN control of time-delay systems’, by F.Y. Tas xc xikaraoglu, L. Ucun and I.B. Kuc xukdemiral: this paper deals with the disturbance rejection problem for discrete-time linear systems having time-varying state delays and control constraints. The study proposes a novel receding horizon HN control method utilizing a linear matrix inequality based optimization algorithm, which is solved in each step of run-time. The proposed controller attenuates disturbances having bounded energies on controlled output, and ensures the closed-loop stability and dissipation while meeting the physical control input constraints. The originality of the work lies on the extension of the idea of the well-known HN receding horizon control technique developed for linear discretetime systems to interval time-delay systems having timevarying delays. The efficiency of the proposed method is illustrated through simulation studies that are carried out on a couple of benchmark problems. ‘Stability region analysis in Smith predictor configurations using a PI controller’, by F.N. Deniz, N. Tan, S.E. Hamamci and I. Kaya. This paper deals with the stabilization problem