2015 |
Hyungbo Shim / Stephan Trenn A Preliminary Result on Synchronization of Heterogeneous Agents via Funnel Control Proceedings Article In: Proc. of 2015 IEEE 54th Conference on Decision and Control, pp. 2229-2234, IEEE, Osaka, Japan, 2015. Abstract | Links | BibTeX | Tags: Adaptive control @inproceedings{ShimTrenn15, We propose a new approach to achieve practical synchronization for heterogeneous agents. Our approach is based on the observation that a sufficiently large (but constant) gain for diffusive coupling leads to practical synchronization. In the classical setup of high-gain adaptive control, the funnel controller gained popularity in the last decade, because it is very simple and only structural knowledge of the underlying dynamical system is needed. We illustrate with simulations that “funnel synchronization” may be a promising approach to achieve practical synchronization of heterogeneous agents without the need to know the individual dynamics and the algebraic connectivity of the network (i.e., the second smallest eigenvalue of the Laplacian matrix). For a special case we provide a proof, but the proof for the general case is ongoing research. |
2014 |
Hyungjong Kim / Hyungbo Shim / Nam Hoon Jo Adaptive Add-on Output Regulator for Rejection of Sinusoidal Disturbances and Application to Optical Disc Drives Journal Article In: IEEE Transactions on Industrial Electronics, vol. 61, no. 10, pp. 5490-5499, 2014. Abstract | Links | BibTeX | Tags: Adaptive control, Control system synthesis @article{KimShimJo14, In this paper, we revisit an add-on output feedback controller that achieves output regulation and disturbance rejection. By add-on controller, we mean an additional controller, which runs harmonically with a preinstalled controller that has been in operation for the plant. When the disturbance attenuation performance of the preinstalled controller is not satisfactory, the add-on controller can be used to eliminate the disturbance. Some advantages of the proposed add-on controller include that it can be designed without much information about the preinstalled controller and it can be plugged in the feedback loop any time in operation without causing unnecessary transient response. In particular, we propose an adaptive add-on controller, which can eliminate sinusoidal disturbances of unknown frequencies. Both simulation and experimental results of the track-following control for optical disc drive systems confirm the effectiveness of the proposed method. |
2008 |
Jung-su Kim / Tae Woong Yoon / Hyungbo Shim / Jin Heon Seo Switching Adaptive Output Feedback MPC for a Class of Input-constrained Linear Plants Journal Article In: IET Control Theory and Applications, vol. 2, no. 7, pp. 573-582, 2008, ISSN: 1751-8644. Abstract | Links | BibTeX | Tags: Adaptive control @article{KimYoonShimSeo08, An adaptive output feedback model predictive control (MPC) for an uncertain input-constrained neutrally stable linear plant using control-relevant switching is presented. By employing an input-to-state stabilising MPC as the multi-controller, switching adaptive output feedback MPC is proposed for the system. Unlike previous methods for handling uncertainties on the basis of minmax MPC laws or techniques for linear parameter varying systems, the proposed MPC scheme employs model switching to deal with modelling uncertainties through adaptation; a best model is selected for the MPC law from time to time. The proposed scheme using finite prediction horizon guarantees global stability. Simulation results are given to show the effectiveness of the scheme. |
List of English Publication
2015 |
A Preliminary Result on Synchronization of Heterogeneous Agents via Funnel Control Proceedings Article In: Proc. of 2015 IEEE 54th Conference on Decision and Control, pp. 2229-2234, IEEE, Osaka, Japan, 2015. |
2014 |
Adaptive Add-on Output Regulator for Rejection of Sinusoidal Disturbances and Application to Optical Disc Drives Journal Article In: IEEE Transactions on Industrial Electronics, vol. 61, no. 10, pp. 5490-5499, 2014. |
2008 |
Switching Adaptive Output Feedback MPC for a Class of Input-constrained Linear Plants Journal Article In: IET Control Theory and Applications, vol. 2, no. 7, pp. 573-582, 2008, ISSN: 1751-8644. |