We present two reduced-dimensional, noncanonical Hamiltonian models for a neutrally buoyant underwater vehicle coupled to an internal moving mass. It is expected that these models will be useful in designing nonlinear control laws for underwater gliders as well as for spacecraft, atmospheric re-entry vehicles, and other vehicles which use internal moving mass actuators. To illustrate, we invest...

In this study, the active vibration control of a rectangular plate submerged in water was investigated. Mass dampers were attached to plate, and system modeled via assumed mode. Water is as an inviscid fluid with moving boundaries at fluid–solid interaction surfaces applied forces on being calculated by Bernoulli equation. The natural frequencies vacuum (for partial fully cases) found from nume...

the purpose of this study was to investigate the effects of body mass index on fundamental motor skills performance in 7-8-year-old boys in hamedan. forthis purpose, 72 elementary students were selected via cluster randomization from the elementary schools of hamedan and divided into three groups: fat, normal, and thin according to percentile diagram. then, tgmd-2 was performed by children and ...

We characterize the global flow of the restricted threebody problem in which we have two mass points of equal masses m1 = m2 > 0 and equal charge q1 = q2 moving on a straight line under Newtonian and Coulombian forces with their centre of mass being fixed at the origin of coordinates and the third mass point with infinitesimal mass, is moving on the straight line perpendicular to the line of mo...

Dynamic response of multispan viscoelastic thin beams subjected to a moving mass is studied by an efficient numerical method in some detail. To this end, the unknown parameters of the problem are discretized in spatial domain using generalized moving least square method (GMLSM) and then, discrete equations of motion based on Lagrange’s equation are obtained. Maximum deflection and bending momen...