Advisors
Now showing items 1-20 of 22
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Analysis of two types of cyclic biological system models with time delays
(Bilkent University, 2011)In this thesis, we perform the stability analysis of two types of cyclic biological processes involving time delays. We analyze the genetic regulatory network having nonlinearities with negative Schwarzian derivatives. ... -
An anti-windup compensator for systems with time delay and integral action
(Bilkent University, 2017-08)Being one of the most popular saturation compensator methods, anti-windup mechanism is commonly used in various control applications. The problems arising from the system nonlinearities are prone to change the behaviors ... -
Computation of the optimal H∞ controller for a fractional order system
(Bilkent University, 2014)This work investigates the H∞ optimal controller design for a fractional order system with time delay. For illustrative purposes, a magnetic suspension system model, derived by Knospe and Zhu is considered. The transfer ... -
Controller design for haptic systems under delayed position and velocity feedback
(Bilkent University, 2012)This thesis considers controller design for haptic systems under delayed position and velocity feedback. More precisely, a complete stability analysis of a haptic system, where local dynamics are described by some ... -
Design of first order controllers for a flexible robot arm with time delay
(Bilkent University, 2016-06)In an earlier work, Gündeş et al. (2007), stabilizing PID controllers for a class of unstable plants with time delays (I/O delays) are obtained. By utilizing this approach and methods given in Özbay and Gündeş (2007, 2014) ... -
Design of P and PI controllers for head positioning in hard disk drives with time delay
(Bilkent University, 2015)In today’s high performance positioning applications, due to stringent design objectives, it is very challenging to cope with input-output time delays. In Hard Disk Drive (HDD) servo system, the information flow between ... -
Design of PD controlleers for unstable infinitive dimensional plants with time-delay
(Bilkent University, 2015)In real life, everything is in movement so there are always continuous transfers, transmissions and transports of people, materials, information and energy to other places. These transfers, transmissions and transports ... -
H (formula) based filtering for systems with time delays and application to vehicle tracking
(Bilkent University, 2007)In this thesis, the filtering problem for linear systems with time delay is studied. The standard mixed sensitivity problem is investigated and the duality between H∞ control problem and H∞ filtering problem is established. ... -
H∞ Filter based target tracking under time delayed measurements
(Bilkent University, 2015-09)In this thesis target traking problem for time delayed linear systems is studied. The standard mixed sensitivity problem is considered with time delayed continuous time processes. Using the duality between control and ... -
A new PI and PID control design method and its application to active queue management of TCP flows
(Bilkent University, 2007)PID controllers are continuing to be used in many control applications due to their simple structures. Design of such controllers for unstable systems with time delays is an active research area. Recently, stabilizing ... -
Numerical computation and implementation of H-infinity controllers for retarded and neutral time delay systems
(Bilkent University, 2017-11)Being the most commonly encountered systems in engineering applications, design of robustly stabilizing H∞ controller with maximum performance for timedelay linear time-invariant systems has been an attractive topic in ... -
Observer design and output feedback Stabilization of time varying systems
(Bilkent University, 2018-07)We study observer design and output feedback stabilization of switched and nonlinear time varying systems. To establish the stability of feedback switched systems with delay, we develop a new extension of a recently ... -
On mixed H2=H∞ controller design for systems with time delay
(Bilkent University, 2018-07)This study discusses mixed H2=H∞ controller design problem for uncertain Linear Time-Invariant (LTI) systems with a time delay. More precisely, the goal is to find an internally stabilizing controller that minimizes ... -
On the structure and implementation of the optimal Q-Parameter in the one-block H-infinity control problem
(Bilkent University, 2020-11)In the robust control theory, H∞ methods are carried out to procure solutions to sensitivity minimization (nominal performance) and robust stability problems in general. These one – block control problems can be ... -
An optimal solution for the multi-agent rendezvous problem appearing in cooperative control
(Bilkent University, 2008)The multi-agent rendezvous problem appearing in cooperative control is considered in this thesis. There are various approaches to this topic as the objectives and problem set-ups vary in real-life rendezvous problems. ... -
Optimality based structured control of distributed parameter systems
(Bilkent University, 2020-12)This thesis proposes a complete procedure to obtain static output feedback (SOF) controllers for large scale discrete time linear time invariant (LTI) systems by considering two criteria: (1) use a small number of actuators ... -
PID controller design for first order unstable time delay systems
(Bilkent University, 2009)In this thesis, problem of designing P, PI and PD-like controllers for switched first order unstable systems with time delay is studied. For each type of controller, the problem is solved in two steps. First, the set of ... -
Reduced order modeling of infinite dimensional systems from frequency response data
(Bilkent University, 2014)In this thesis, a system identification method using frequency response data is studied. Identification method is applied to various types of distributed parameter systems, in particular flexible structures. One of the ... -
Robustly and strongly stabilizing low order controller design for infinite dimensional systems
(Bilkent University, 2018-07)This thesis deals with the robust stabilization of in nite dimensional systems by stable and low order controllers. The close relation between the Nevanlinna-Pick interpolation problem and the robust stabilization is ... -
Smith predictor based controller design for a flexible robot arm
(Bilkent University, 2013)In this thesis, a new Smith predictor based controller is proposed for a flexible robot arm. A typical robot arm model includes high order modes with integral action from torque input to velocity output. Here we can also ...
