The new approach to modal parameter identification, presented in this paper, uses an asymptotically stable observer to form a discrete state-space model for a wind turbine structure. The identification is per­ formed using input-output time-series. A special software package developed in this research has been tested using the data generated by the ADAMS�1 model of the Micon 65/13 wind turbine ...

Good evidence is clearly required for the sort of knowledge sought in science, logic, mathematics, and philosophy. This suggests the idea of approaching the a priori through the topic of “evidence” (or reasons). The paper begins with a discussion of our use of “intuitions” as evidence (reasons) in the a priori disciplines (logic, mathematics, philosophy) and an argument showing that omitting in...

Simulation and prediction of eigenfrequencies and resonance problems for flexible structures is an important task in disciplines such as robotics and aerospace engineering. However, little effort seems to have been put into the problem dealing with modal analysis of mechatronic systems containing coupled flexible structures and control systems. When, for instance, designing a satellite tracking...

A series of gadolinium complexes were synthesised in order to test the design of dual-modal probes that display a change in fluorescence or relaxivity response upon binding of zinc. A dansyl-DO3ATA gadolinium complex [GdL1] displayed an increase and a slight blue-shift in fluorescence in the presence of zinc; however, a decrease in relaxation rate was observed. Consequently, the ability of the ...

This paper presents the effective control of the formation and competition of cellular patterns. Simulation and theoretical analyses are carried out for pattern formation in a confined circular domain. The Cahn–Hilliard equation is solved with the zero-flux boundary condition to describe the phase separation of binary mixtures. A wavelet-based discrete singular convolution algorithm is employed...

Modal analyses are essential steps in structural design. Simple and quick numerical procedures design tools for modal dynamic analysis of bonded joints would be an attractive option to increase the efficiency process its early phases. This paper offers a simple tool dedicated single lap with balanced unbalanced adherends various boundary conditions. Based on macro-element technique developed Ta...

An exact and fast analytic method based on power series is established to predict the modal field distributions, Petermann-2 spot size, the normalized propagation constant corresponding to fundamental and first higher order mode in graded index fibers with any arbitrary power law profile. The variation of normalized cut-off frequencies of some LPlm modes in graded index fibers with different pr...

A finite model updating method that combines dynamic-static long-gauge strain responses is proposed for highway bridge static loading tests. For this method, the objective function consisting of static long-gauge stains and the first order modal macro-strain parameter (frequency) is established, wherein the local bending stiffness, density and boundary conditions of the structures are selected ...

We present an algorithm for computing directly the denotation of a modal μcalculus formula χ over the configuration graph of a pushdown system. Our method gives the first extension of the saturation technique to the full modal μ-calculus. Finite word automata are used to represent sets of pushdown configurations. Starting from an initial automaton, we perform a series of automaton manipulations...

This research is to investigate the dynamic characteristics of the grinding process. A kind of robust grinding wheel reciprocating arrangement is schemed out, which realizes the precise point-grinding machining. The grinding wheel reciprocating movement is driven by a linear motor to replace the traditional crank or hydraulic pressure drive device. Based on the time series method, the modal exp...