The theory of complex mode shapes for damped oscillatory mechanical systems is explained, using the matrix of transfer functions in the Laplace domain. These mode shapes are defined to be the solutions to the homogeneous system equation. It is shown that a complete transfer matrix can be constructed once one row or column of it has been measured, and hence that mass, stiffness, and damping matr...

The lumped constant of the deoxyglucose method was determined by the steady-state, model-independent method in the brain of normal conscious rats with arterial plasma glucose concentrations varying from normoglycemia (i.e., 8 mM) to hyperglycemia (i.e., 31 mM). The lumped constant for brain was found to decrease very gradually with increasing arterial plasma glucose concentration from a value o...

Severe vibration may occur in structures such as high-rise buildings and bridges according to wind seismic excitations, large space due their lightweight flexible constitution. Generally, when several modes are simultaneously excited, application of the model-based control strategies become difficult. In this study, we propose a wave absorption method for reducing vibrations multi-degree-of-fre...

Weight reduction is a recurring concern in the design of modern mechanical systems. This search may lead engineers to resort using gears with holes order meet their requirements. paper presents methodology carry out nonlinear dynamic analyses gear transmission blanks subjected multiharmonic internal excitation. work investigates influence these on vibration levels, occurrence contact loss and p...

Anderson and Bowser [1986], hereafter referred to as AB, presented a very interesting paper on the study of the role of groundwater in delaying lake acidification i Wisconsin. By considering the input/output of hydrogen ion with respect o the aquifer, including nonconservative transport through the use of the retardation factor, the effect of a delay in the arrival of acid to the lake is demons...

This paper demonstrates the feasibility of modeling any dynamical system using a set of fractional order differential equations, including distributed and lumped systems. Fractional order differentiators and integrators are the basic elements of these equations representing the real model of the dynamical system, which in turn implies the necessity of using fractional order controllers instead ...

Research on motion characteristics of the space flexible-joint flexible-link manipulator is investigated. The equations N degree freedom (DOF) flexible are established by means Newton-Euler method and finite segment considering both computational efficiency accuracy. genetic algorithm used to identify parameters torsional stiffness damping related link flexibility. derived model involves dynami...

Abstract The elastic deformation of the links in robot mechanisms affects precision their motion and fatigue strength. Kineto-elastodynamics (KED)-the dynamics analysis that considers elasticity links-emerged early studies has been subject extensive research applications since. However, there have no reports on effects kinematic pair clearances vibration mechanisms. This is mainly because finit...

Maintaining the performance of a fuel cell stack requires appropriate management water in membrane electrode. One solution is to apply an external humidifier supply gases. However, operating conditions change continuously, which significantly affects and gas characteristics. A straightforward module needed for integration with system model. In this study, lumped-mass model was used simulate hol...