Kinematics and dynamics of pitching flexible panels in a quiescent fluid

Utilization of conventional energy sources such as coal, fuel oil, natural gas and others on the one hand has a low operating cost, but on the other side of the barriers is the greater source of diminishing returns and, more importantly, the emergence of environmental pollution problems dangerous to human life. This study aims to formulate the kinematics and dynamics to determine the movement of Solar Power Mower. In this study, using solar power as an energy source to charge the battery which then runs the robot. Design and research was conducted in the Department of Mechanical Workshop Faculty of Engineering, University of Hasanuddin of Gowa. Control system used is a manual system using radio wave transmitter and receiver which in turn drive the robot in the direction intended. Experimental results showed that treatment with three variations of the speed of 6.63 m / s, 8.84 m / s and 15.89 m / sec then obtained the best results occur in grass cutting 15.89 sec and high-speed cutting grass 5 cm. Formulation of kinematics and dynamics for lawn mowers, there are 2 control input variables, x and y ̇ ̇ 3 to control the output variables x, y and θ so that there is one variable redudant. Keywords: mobile robots, lawn mower, solar power

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Effect of Rope Skipping Techniques on Kinematics and Dynamics of Motion

International Review of Mechanical Engineering (IREME) ◽

10.15866/ireme.v8i6.1843 ◽

2014 ◽

Vol 8 (6) ◽

pp. 1037

Author(s):

Ratna Chow ◽

Ahmad Faizal Salleh ◽

Mohd Shahril Salim ◽

Wan Mohd Radzi Bin Rusli ◽

Norazian Abd. Razak ◽

...

Keyword(s):

Kinematics And Dynamics ◽

Rope Skipping

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Spatial Operator Approach to Under-Actuated Manipulator Kinematics and Dynamics

1991 American Control Conference ◽

10.23919/acc.1991.4791756 ◽

1991 ◽

Cited By ~ 1

Author(s):

A. Jan ◽

G. Rodriguez

Keyword(s):

Kinematics And Dynamics ◽

Operator Approach ◽

Spatial Operator

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Numerical study of STBLI on flexible panels with wall-modeled LES

AIAA Scitech 2021 Forum ◽

10.2514/6.2021-0250 ◽

2021 ◽

Author(s):

Jonathan F. Hoy ◽

Ivan Bermejo-Moreno

Keyword(s):

Numerical Study ◽

Flexible Panels

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Trends in the development of flexible thermal protection systems for modern aircraft

Perspektivnye Materialy ◽

10.30791/1028-978x-2020-6-10-21 ◽

2020 ◽

pp. 10-21

Author(s):

V. G. Babashov ◽

◽

N. M. Varrik ◽

Keyword(s):

High Temperature ◽

Thermal Protection ◽

Heat Removal ◽

Operating Conditions ◽

Passive Protection ◽

Thermal Protection Systems ◽

Heat Protection ◽

Protection Systems ◽

Protected Surface ◽

Flexible Panels

The emergence of new types of space and aviation technology necessitates the development of new types of thermal protection systems capable of operating at high temperature and long operating times. There are several types of thermal protection systems for different operating conditions: active thermal protection systems using forced supply of coolant to the protected surface, passive thermal protection systems using materials with low thermal conductivity without additional heat removal, high-temperature systems, which are simultaneously elements of the bearing structure and provide thermal protection, ablation materials. Heat protection systems in the form of rigid tiles and flexible panels, felt and mats are most common kind of heat protecting systems. This article examines the trends of development of flexible reusable heat protection systems intended for passive protection of aircraft structural structures from overheating.

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Kinematics and dynamics of lava flows

10.1130/spe396 ◽

2005 ◽

Author(s):

Michael Manga ◽

Guido Ventura

Keyword(s):

Lava Flows ◽

Kinematics And Dynamics

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Settling of an asymmetric dumbbell in a quiescent fluid

Journal of Fluid Mechanics ◽

10.1017/jfm.2016.350 ◽

2016 ◽

Vol 802 ◽

pp. 174-185 ◽

Cited By ~ 6

Author(s):

F. Candelier ◽

B. Mehlig

Keyword(s):

Reynolds Number ◽

Steady State ◽

Size Difference ◽

Fluid Inertia ◽

Horizontal Orientation ◽

Vertically Aligned ◽

Rigid Rod ◽

Quiescent Fluid

We compute the hydrodynamic torque on a dumbbell (two spheres linked by a massless rigid rod) settling in a quiescent fluid at small but finite Reynolds number. The spheres have the same mass densities but different sizes. When the sizes are quite different, the dumbbell settles vertically, aligned with the direction of gravity, the largest sphere first. But when the size difference is sufficiently small, then its steady-state angle is determined by a competition between the size difference and the Reynolds number. When the sizes of the spheres are exactly equal, then fluid inertia causes the dumbbell to settle in a horizontal orientation.

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Frequency–Amplitude Relationship of a Nonlinear Symmetric Panel Absorber Mounted on a Flexible Wall

Symmetry ◽

10.3390/sym13071188 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1188

Author(s):

Yiu-Yin Lee

Keyword(s):

Elliptic Integral ◽

Algebraic Equations ◽

Cavity Depth ◽

Nonlinear Algebraic Equations ◽

Flexible Panel ◽

Flexible Wall ◽

Elliptic Integral Method ◽

Flexible Panels ◽

Relationship Of ◽

Panel Absorber

This study addresses the frequency–amplitude relationship of a nonlinear symmetric panel absorber mounted on a flexible wall. In many structural–acoustic works, only one flexible panel is considered in their models with symmetric configuration. There are very limited research investigations that focus on two flexible panels coupled with a cavity, particularly for nonlinear structural–acoustic problems. In practice, panel absorbers with symmetric configurations are common and usually mounted on a flexible wall. Thus, it should not be assumed that the wall is rigid. This study is the first work employing the weighted residual elliptic integral method for solving this problem, which involves the nonlinear multi-mode governing equations of two flexible panels coupled with a cavity. The reason for adopting the proposed solution method is that fewer nonlinear algebraic equations are generated. The results obtained from the proposed method and finite element method agree reasonably well with each other. The effects of some parameters such as vibration amplitude, cavity depth and thickness ratio, etc. are also investigated.

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