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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.
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.
항공기 시스템 설계와 안전성평가에 운영경험 반영 사례 연구
구민성,Koo, Min-Sung 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.2
Airworthiness authorities specify the technical standards of airworthiness that propose minimum requirement of the commercial transport category and apply the rules in the certification process to ensure the safety of the aircraft. The Federal Aviation Administration and other national airworthiness authorities define the fatal accident risk levels for the safety assessment of the aircraft system and establish standard procedures to apply both qualitative and quantitative analysis techniques. However, an accident or incident may occur by the combination of various factors, although the aircraft is designed in accordance with the strict standards and approval by the Airworthiness Authorities. There are some key factors, such as human error, unpredictable complex system failures, degradation of the components reliability, improper maintenance task and intervals. Risk can be reduced by reflecting aircraft operational experience with similar types of aircraft in the process of aircraft development and safety assessment. Result of the root cause analysis for the Airbus A300-600 incident in which the aircraft engine reverser was deployed in the air have been introduced to reflect the design of system and related components. Also, this paper suggests to create a big-database in order to provide a feed-back to the FAR Part 25 transport category design and safety assessment of the operational experience.
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.
Min-Sung Koo(구민성),Ho-Lim Choi(최호림) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.18 No.1
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.
A Global Regulation Method of Nonlinear Systems with Unbounded Parameters Under State Feedback Frame
Min-Sung Koo(구민성),Ho-Lim Choi(최호림) 제어로봇시스템학회 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.
Measurement Feedback Control of a Class of Nonlinear Systems via Matrix Inequality Approach
Min-Sung Koo(구민성),Ho-Lim Choi(최호림) 제어로봇시스템학회 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.