Browsing by Author "Koumboulis, F. N."
Now showing items 120 of 40

Adaptive asymptotic disturbance attenuation for a permanent magnet DC motor
Koumboulis, F. N.; Kouvakas, N. D.; Pantelios, A. G.; Mertzios, B. G. (2001)The problem of speed control of a permanent magnet DC motor with unknown parameters and unknown external load torque is formulated in the form of an adaptive control problem based on the design requirement of asymptotic ... 
Automatic steering control of unmanned vehicles
Koumboulis, F. N.; Skarpetis, M. G. (2000)The problem of robust automatic steering of an autonomous unmanned vehicle is studied. The problem is solved using a robust PD feedback controller feeding back the path error and the front steering angle. The design goal ... 
Characterization of the allowable perturbations for disturbance rejection and data sensitivity
Koumboulis, F. N. (1996)In this paper the problem of disturbance rejection and data sensitivity is studied for the case of linear time invariant systems. Using a proportional state feedback law, the necessary and sufficient conditions for the ... 
Command following and disturbance rejection for drillstring systems
Skarpetis, M. G.; Koumboulis, F. N.; Ladopoulos, T. (2000)In this paper a PD state feedback law is proposed to control the angular velocity of the bit of an drillstring system. The design objective is: the angular velocity of the bit to follow a desired signal independently from ... 
Controller design for lateral manoeuvres in electromagnetic wind tunnels
Koumboulis, F. N.; Skarpetis, M. G. (1996)The roll angle, the yaw angle and the sideslip position of test aircrafts in electromagnetic wind tunnels, are independently controlled. The problem is proven to be always solvable by applying a static state feedback law ... 
Decoupling of singular systems via PD feedback
Koumboulis, F. N.; Mertzios, B. G. (1996)The problem of inputoutput decoupling of singular systems via proportional plus derivative (PD) feedback is solved. The necessary and sufficient condition for the problem to have a solution is established. A special ... 
Decoupling of the longitudinal modes of advanced aircraft
Skarpetis, M. G.; Koumboulis, F. N. (1996) 
Disturbance decoupling of singular systems via PD feedback
Koumboulis, F. N.; Mertzios, B. G. (1999)The problem of disturbance decoupling of singular systems via proportional plus derivative (PD) feedback is solved. The necessary and sufficient condition for the problem to be solvable is established as a rank condition ... 
Feedback controlling against chaos
Koumboulis, F. N.; Mertzios, B. G. (2000)A PD (Proportional plus Derivative) feedback controller is proposed for the control of chaotic dynamic systems. Using this feedback law the design requirement of command matching is satisfied independently of the perturbations ... 
Generalized Hankel matrix for the minimal realization of singular systems
Koumboulis, F. N.; Mertzios, B. G. (1996)A generalized Hankel matrix (in pencil form) is introduced. Based upon this definition the dimension of the minimal realization and the controllability and observability properties are related in a straight forward way. ... 
Indirect adaptive neural control for precalcination in cement plants
Koumboulis, F. N.; Kouvakas, N. D. (2002)Control of the precalcination degree in the precalciner of cement plants is a problem of great importance due to its effect to the quality of the clinker, the consumed energy and the byproducts of the whole cement pyroprocess. ... 
Inputoutput decoupling for linear systems with nonlinear uncertain structure
Koumboulis, F. N.; Skarpetis, M. G. (1996)in this paper the problem of inputoutput decoupling for linear systems with nonlinear uncertain structure, via an independent of the uncertainties static state feedback law, is studied and solved for the first time. The ... 
Inputoutput triangular decoupling and data sensitivity (vol 32, pg 569, 1996)
Koumboulis, F. N. (1996) 
Meeting transfer function requirements via static measurement output feedback
Koumboulis, F. N.; Tzierakis, K. G. (1998)The important transfer function design problems of inputoutput decoupling, exact model matching and disturbance rejection, via static measurement output feedback, are studied for the case of generalized state space systems. ... 
Multi  Objective robust control for 4WS cars
Skarpetis, M. G.; Koumboulis, F. N. (2000)The problem of robust regional stabilization with simultaneous robust triangular decoupling (RRSRTD) for a four wheel steering car (4WS) is studied. First the robust triangular technique is applied to the 4WS car in order ... 
Noninteracting control for helicopter in straight horizontal flight
Koumboulis, F. N.; Skarpetis, M. G.; Griparis, M. K. (1998)Pitch angle and forward velocity are decoupled via a static state feedback law for the case of helicopter in straight horizontal flight. The set of stability derivatives for which decoupling is satisfied, is explicitly ... 
Noninteracting control of descriptor systems involving disturbances
Koumboulis, F. N.; Tzierakis, K. G. (1997)For minput poutput descriptor systems involving disturbances, it is proven that if the problem of disturbance rejection is solvable via staticstate feedback and the inputoutput transfer function matrix is right invertible, ... 
Numerical integration of fluid dynamics problems by discrete dynamical systems
Koumboulis, F. N.; Skarpetis, M. G.; Mertzios, B. G. (2000)A discrete time algorithm for the numerical solution of the NavierStokes equations, namely the set of nonlinear partial differential equations (PDEs) characterizing the how of viscous and compressible fluids is presented. ... 
On Kalman's controllability and observability criteria for singular systems
Koumboulis, F. N.; Mertzios, B. G. (1999)The controllability and observability properties of a singular system are extensively studied The definitions of controllability, Rcontrollability, and impulse controllability are introduced via characteristics of the ... 
On the Derivation of the Nonlinear Discrete Equations Numerically Integrating the Euler PDEs
Koumboulis, F. N.; Skarpetis, M. G.; Mertzios, B. G. (1998)The Euler equations, namely a set of nonlinear partial differential equations (PDEs), mathematically describing the dynamics of inviscid fluids are numerically integrated by directly modeling the original continuousdomain ...