Abstract: In this paper, experiments and discrete element method (DEM) simulations were conducted in parallel to examine the underlying mechanisms of aging effects on the stiffness changes of sand with inherent fabric anisotropy. ...

Abstract: We consider the tracking control problem of mechanical manipulators in the presence of uncertainty. Two classes of control algorithms are proposed. If the possible bound of the uncertainty is ...

Abstract: We consider a class of nonlinear uncertain interconnected systems with time-varying uncertainty. The uncertainty may arise within each system as well as in the interconnections. The uncertainty ...

Abstract: We study the control design problem for uncertain nonlinear systems. A new matching condition is presented. The main idea is to explore the route through which the (worst case) uncertainty may ...

Abstract: This paper provides background on the use of lightweight aggregate concrete in long-span bridges. Observed time-dependent deflection of long-span lightweight aggregate concrete box-girder bridges is highlighted. The paper ...

Abstract: This paper reports

Abstract: Hamel proposed a seemingly intuitive, simple, straightforward, but incorrect, method of formulating the constrained equation of motion. The method has to do with the direct embedding of the constraint into the kinetic ...

Abstract: The model-following control problem for nonlinear uncertain dynamical systems is considered. Based only on the knowledge of functional properties relating to the bound of the time-varying uncertainty, ...

Abstract: We consider the robustness problem of uncertain dynamical systems which do not satisfy the so-called matching conditions. We employ the controls which assure practical stability of the associated ...

Abstract: A class of large-scale linear uncertain systems is under consideration. The uncertainty is time-varying. No a priori deterministic or stochastic information is assumed except its possible bound. ...