Browsing Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics by Author "Zhang, Y."
Now showing items 1-17 of 17
-
Article
Adaptive control of a class of slowly time varying systems with modeling uncertainties
Fidan, B.; Zhang, Y.; Ioannou, Petros A. (2005)In a recent work, a new linear adaptive controller based on certainty-equivalence and backstepping design, which promises a level of transient and asymptotic performance comparable to that of the tuning functions adaptive ...
-
Article
Autonomous intelligent cruise control using front and back information for tight vehicle following maneuvers
Zhang, Y.; Kosmatopoulos, Elias B.; Ioannou, Petros A.; Chien, C. C. (1999)During manual driving, most human drivers often use information about the speed and position of the preceding and following vehicles in order to adjust the position and speed of their vehicles. The purpose of this paper ...
-
Article
Backstepping Control of Linear Time-Varying Systems with Known and Unknown Parameters
Zhang, Y.; Fidan, B.; Ioannou, Petros A. (2003)The backstepping control design procedure has been used to develop stabilizing controllers for time invariant plants that are linear or belong to some class of nonlinear systems. The use of such a procedure to design ...
-
Article
Combined Variable Speed Limit and Lane Change Control for Highway Traffic
Zhang, Y.; Ioannou, Petros A. (2017)Variable speed limit (VSL) control of highway traffic is expected to improve traffic mobility, safety, and environment, especially during incidents. However, most existing VSL controllers show significant benefits in ...
-
Conference Object
Combined Variable Speed Limit and Lane Change Control for Truck-Dominant Highway Segment
Zhang, Y.; Ioannou, Petros A. (Institute of Electrical and Electronics Engineers Inc., 2015)Traffic demand of trucks is rapidly increasing on highway networks, which harms highway traffic mobility, safety and the environment. Variable speed limit (VSL) control is considered to be able to improve the traffic ...
-
Article
Continuous dependence of entropy solutions to the Euler equations on the adiabatic exponent and mach number
Chen, G. -Q; Christoforou, Cleopatra; Zhang, Y. (2008)We establish the L1-estimates for continuous dependence of entropy solutions to the full Euler equations away from the vacuum on two physical parameters: the adiabatic exponent γ → 1 that passes from the non-isentropic to ...
-
Article
Dependence of entropy solutions in the large for the euler equations on nonlinear flux functions
Chen, G. -Q; Christoforou, Cleopatra; Zhang, Y. (2007)We study the dependence of entropy solutions in the large for hyperbolic systems of conservation laws whose flux functions depend on a parameter vector μ. We first formulate an effective approach for establishing the L ...
-
Article
Environmental Impact of Combined Variable Speed Limit and Lane Change Control: A Comparison of MOVES and CMEM Model
Zhang, Y.; Ioannou, Petros A. (2016)Highway congestion is detrimental to traffic mobility and has negative impact on the environment. Variable speed limit (VSL) control is an approach that aims to reduce the impact of congestion by controlling the speed of ...
-
Conference Object
Intelligent driver assist system for urban driving
Ioannou, Petros A.; Zhang, Y. (Institute of Electrical and Electronics Engineers Inc., 2016)Driving in an urban environment is hectic and often adventurous. Getting accurate routing instructions, finding parking spots, receiving customized information that helps individual drivers reach their destination will ...
-
Article
A new class of nonlinear robust adaptive controllers
Zhang, Y.; Ioannou, Petros A. (1996)Recently, a new class of adaptive control schemes, motivated from nonlinear systems theory, has been proposed for minimum phase linear time invariant plants. Under certain assumptions on the plant transfer function, these ...
-
Article
A new linear adaptive controller: Design, analysis and performance
Zhang, Y.; Ioannou, Petros A. (2000)The certainty equivalence and polynomial approach, widely used for designing adaptive controllers, leads to "simple" adaptive control designs that guarantee stability, asymptotic error convergence, and robustness, but not ...
-
Conference Object
A new robust adaptive control scheme for linear time varying plants
Fidan, B.; Zhang, Y.; Ioannou, Petros A. (2002)In a recent work, a new linear adaptive controller based on certainty-equivalence and backstepping design, which promises a level of transient and asymptotic performance comparable to that of the tuning functions adaptive ...
-
Article
Parameter convergence of a new class of adaptive controllers
Zhang, Y.; Ioannou, Petros A.; Chien, C. -C (1996)A new class of adaptive control schemes for minimum-phase linear time invariant (LTI) systems has recently been developed using nonlinear design techniques which guarantee improved transient performance in addition to ...
-
Conference Object
Roadway traffic controller design for automated highway systems
Chien, C. C.; Zhang, Y.; Stotsky, A.; Ioannou, Petros A. (IEEE, 1994)For manual driving, the traffic flow is often irregular, unstable leading to congestion and to low traffic flow rate during minor incidents. These irregularities are due to variation of vehicle speeds and headways that are ...
-
Article
Robustness and performance of a modified adaptive backstepping controller
Zhang, Y.; Ioannou, Petros A. (1998)Recently, a new class of adaptive control schemes based on non-linear design techniques, have been proposed for minimum phase linear time invariant plants. Under certain assumptions on the plant transfer function, these ...
-
Article
Robustness of nonlinear control systems with respect to unmodeled dynamics
Zhang, Y.; Ioannou, Petros A. (1999)In theory, it can be established that nonlinear control laws for linear or nonlinear plants can be used to meet strict performance requirements. The success of these control designs in practical situations will very much ...
-
Article
Traffic Density Control for Automated Highway Systems
Chien, C. -C; Zhang, Y.; Ioannou, Petros A. (1997)Traffic flow instabilities such as traffic congestion are often caused by ad hoc and inappropriate speeds and headways that humans choose when they operate their vehicles. In an automated highway system (AHS) environment, ...