A wide application of sliding mode variable structure control as a nonlinear robust method, has been witnessed in anti-swing positioning bridge crane system. Aiming at the problem that system is not approaching process, new Global-Equivalent Sliding Mode Controller (GESMC) based on proposed. This controller can realize anti-sway under condition uncertain model parameters and external disturbanc...

This paper presents a new circuit arrangement for a current-mode Wheatstone bridge that is suitable for low-voltage integrated circuits implementation. Compared to the other proposed circuits, this circuit features severe reduction of the elements number, low supply voltage (1V) and low power consumption (<350uW). In addition, the circuit has favorable nonlinearity error (<0.35%), operate with ...

Structural damage detection is a field that has attracted a great interest in the scientific community in recent years. Most of these studies use dynamic analysis data of the beams as a diagnostic tool for damage. In this paper, a massless rotational spring was used to represent the cracked sections of beams and the natural frequencies and mode shape were obtained. For calculation of rotational...

Non-destructive testing (NDT) is an important area of research, dealing with diagnostic and monitoring the health of structures and structural components and preventing catastrophic failures. One of the recently developed NDT techniques is the method of strain energy mode shapes that allows the determination of changes in structural integrity from changes in the vibrational response of a struct...

The vibration characteristics of piezoelectric hollow-disc transducers were investigated in this paper. It was assumed that the vibration modes were coupled in the axial and radial directions. Theoretically the differential equations of piezoelectric motions were derived in terms of the axial and radial displacements and the electric potential. Solutions of the boundary value problem yielded th...

Abstract: A Equid bridge between two sofid surfaces is known as a capi~ary bridge. Long bridges naturwy become unstable to a symmetric mode by bti@ng near one end while the opposite end thins (the (2,0) mode) and suppressionof this mode is important for managing fluids in low gravity. For a cyhndrical bridge in low gravity of radius R and length L, the slenderness S = L/2R has a natural (Raylei...

In this paper, we present a multimedia system designed to facilitate learning of alphabetical handwriting of various languages by incorporating visual, auditory, and haptic feedback. An XML-based schema has been used to easily introduce new characters from other languages. The system supports two modes of operation: a learning mode and an evaluation mode. In the learning mode, a user can see, h...

This paper contains a linear analysis of pulse shapes produced by a spatial and temporal delta-function disturbance of cyclotron-resonance-maser modes for the case where the initial equilibrium state is free of radiation. A pinch-point analysis based on the theory of Briggs and Bers is employed. Numerical and analytical techniques are developed for the straightforward calculation of pinch-point...