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구민성,최호림,임종태 제어·로봇·시스템학회 2014 International Journal of Control, Automation, and Vol.12 No.4
In this paper, feedback linearization method is proposed for nonlinear systems with a time varying delay in states. The diffeomorphism is presented to linearize the state-delayed nonlinear system if time-varying delay is known. Furthermore, we propose a control scheme to stabilize the approximate feedback linearizable system under the proposed conditions if the first order derivative of time-varying delay and the parametric uncertainties are finite and measurable.
Measurement Feedback Control of a Class of Nonlinear Systems via Matrix Inequality Approach
구민성,최호림,Koo, Min-Sung,Choi, Ho-Lim Institute of Control 2014 제어·로봇·시스템학회 논문지 Vol.20 No.6
We propose a measurement state feedback controller for a class of nonlinear systems that have uncertain nonlinearity and sensor noise. The new design method based on the matrix inequality approach solves the measurement feedback control problem of a class of nonlinear systems. As a result, the proposed methods using a matrix inequality approach has the flexibility to apply the controller. In addition, the sensor noise can be attenuated for more generalized systems containing uncertain nonlinearities.
구민성,최호림,Koo, Min-Sung,Choi, Ho-Lim Institute of Control 2015 제어·로봇·시스템학회 논문지 Vol.21 No.8
We present an output feedback controller for a class of nonlinear systems with uncertain nonlinearity and sensor noise. The sensor noise has both a finite constant component and a time-varying component such that its integral function is finite. The new design and analysis method is based on the matrix inequality approach. With our proposed controller, the states and output can be ultimately bounded even though the structure of nonlinearity is more general than that in the existing results.
Global Regulation of a Class of Nonlinear Systems with High-order Triangular Type Nonlinearity
구민성,최호림,임종태 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.4
The problem of global regulation is investigated for a class of nonlinear systems which contain some high-order terms. We propose a high-order scaling state-feedback controller with appropriate dynamic gains. Compared to existing results, the condition on the nonlinearity is flexible due to the freedom of choosing the bounding positive function of the nonlinearity. Thus, the nonlinear systems with some high-order nonlinearities which do not belong to existing conditions can be globally regulated.
구민성,Gu, Min-Seong 한국데이터베이스진흥원 2005 디지털콘텐츠 Vol.1 No.-
국내에 플레이스테이션2와 X박스 게임 큐브가 정식으로 발매된지 거의 3년이 다 돼간다. 그동안 우리는 외산 비디오 게임을 즐기기만(소비하기만)했을 뿐 자체적인 콘텐츠를 만들어 내지는 못했다. 그러나 이런 이야기도 이젠 사라질 때가 되었다. 일본에서 15만장의 판매고를 올린 마그나카르타:진흥의 성혼이 나왔기 때문이다.
A Global Regulation Method of Nonlinear Systems with Unbounded Parameters Under State Feedback Frame
구민성,최호림,Koo, Min-Sung,Choi, Ho-Lim Institute of Control 2016 제어·로봇·시스템학회 논문지 Vol.22 No.3
In this paper, we consider a regulation problem of nonlinear systems under two triangular conditions where there possibly exist unbounded parameters in the systems. We propose a state feedback controller with dynamic gains in order to deal with unbounded parameters based on the condition of the time-varying rate of the growing parameter. The analysis of our control scheme is carried out by Lyapunov stability method. Our control method is verified by simulation results.
구민성,최호림,Koo, Min-Sung,Choi, Ho-Lim Institute of Control 2016 제어·로봇·시스템학회 논문지 Vol.22 No.7
We deal with the regulation problem of nonlinear systems with time-varying delays in both the states and input. A new state feedback controller with dynamic gains is developed based on matrix inequality and non-predictor methods. The proposed control scheme is analyzed using the Razumikhin theorem, and its effectiveness is demonstrated with simulation results.