Ho-Lim Choi

Bio: Ho-Lim Choi is an academic researcher from Dong-a University. The author has contributed to research in topics: Nonlinear system & Control theory. The author has an hindex of 13, co-authored 95 publications receiving 558 citations.

Output Feedback Regulation of a Chain of Integrators With an Unbounded Time-Varying Delay in the Input

Abstract: There are several results on the stabilization or regulation of a chain of integrators in the presence of a constant or time-varying delay in the input. However, the existing results commonly assume that the delay is restricted to be bounded. In this paper, the regulation problem of a chain of integrators with an unbounded time-varying delay in the input is considered. We propose an output feedback controller with a time-varying gain-scaling factor which is determined based on the condition of time-varying rate of the delay. As a benefit over the existing results, the delay is now allowed to be unbounded under the proposed condition. Also, uncertain delays can be accommodated with the proposed controller. Moreover, our proposed control scheme exhibits robustness such that the considered system can be extended to include some uncertain feedforward nonlinearities.

Global Regulation of a Class of Uncertain Nonlinear Systems by Switching Adaptive Controller

Abstract: There are several results on the stabilization or regulation of nonlinear systems with either triangular or feedforward nonlinearity. However, the existing results are applicable to their considered systems when the nonlinearity structure is known a priori. In this technical note, we propose a switching adaptive controller which tunes the dynamic gain depending on the nonlinearity structure. Thus, as a benefit over the existing results, the structural information on the nonlinearity is not needed. Although the linear growth condition is assumed, the rate of growth is unknown and arbitrary large with our control scheme.

Linear System Theory

Abstract: Chapter 8 establishes the relationship between the input and output power spectral densities of a linear system. Limitations on results are carefully detailed and the case of oscillator noise is considered. The theory is extended to multiple input-multiple output systems.

Nonlinear Functional Analysis And Its Applications

Abstract: nonlinear functional analysis and its applications is available in our book collection an online access to it is set as public so you can get it instantly. Our books collection hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Merely said, the nonlinear functional analysis and its applications is universally compatible with any devices to read.