Search Results - "Degree of freedom"

ObjectiveA 2-UPS/RRR parallel mechanism was created for the rehabilitation of the ankle.MethodsThe mechanism’s three-dimensional model was created using SolidWorks software, and a moveable platform with an adjustable center of rotation was designed in accordance with various ankle rotation centers o...

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The sompoton is one of famous traditional musical instruments in Sabah. This instrument consists of several parts with the vibrator being the most important one. In this paper, the vibrator is modeled as a clamped bar with a uniformly distributed mass. By means of this model, the fundamental frequen...

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This paper presents an advanced seismic performance evaluation of reinforced concrete (RC) seismically isolated frame structures under the conditions of rare earthquakes. By employing an elastic–plastic analysis in conjunction with a nonlinear multi-degree-of-freedom model, this study innovatively a...

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This study examines the hydrodynamic response and structural stability of an eccentric conical floating structure, a return capsule for manned space missions, to ensure safe water landings. Using numerical simulations and experiments, we evaluated how center-of-mass offsets, displacement volume cont...

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Positioning a load in a two-dimensional subspace requires a two-degrees-of-freedom (2 DoF) position control system. The precise positioning of the load has been the driving motivation for electro-hydraulic actuation and its robust control. 2 DoF electro-hydraulic servo system (EHSS) is complex and n...

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Objective: Theories are in paradox in relation to the variability pattern with being skilled. Then this research has investigated two types of absolute and coordination variability during basketball free throw learning, with isolating mechanical and dynamical degrees of freedom. Methods: Twenty self...

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Hydraulic legged robots, with advantages such as high load capacity and power density, have become a strategic driving force in advancing intelligent mobile platform technologies. However, their high energy consumption significantly limits long-duration endurance and efficient operational performanc...

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A novel approach for determining the bearing capacity of pile foundations using rapid load testing is suggested to rectify the inaccuracies arising from the presumption of a constant damping coefficient and excess pore water pressure during the evaluation of pile foundation bearing capacity in soil....

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The mathematical model of a recycled flow sheet is studied. The number of degrees of freedom is determined, and different sets of the simulation task are considered. Analytical and numerical calculation of the recycled flow sheet steady states is performed.

Based on the research of the directional self-adaptive piezoelectric energy harvester (DSPEH), a structural design scheme of a multi-directional hybrid energy harvester (MHEH) is put forward. The working principle of the MHEH is experimentally studied. A prototype is designed and manufactured, and t...

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Predicting flow-induced vibration (FIV) of multiple slender structures remains a modern challenge in science and engineering due to the phenomenon’s sensitivity to layout parameters and the emergence of oscillations driven by multiple mechanisms. The present study examines the FIV of five circular c...

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Objective. The purpose of the study is to reveal the theoretical and practical aspects of mathematical modeling of the angular displacements of the base machine, which allows a deeper understanding of the principles of its operation and interaction with the environment.Method. With the help of a mat...

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This paper presents an experimental investigation into the application of Magnetorheological Elastomer (MRE) isolators for torsional vibration isolation in a Single Degree of Freedom (SDoF) system. First, the characteristics have been extensively studied under torsional shear, followed by the deriva...

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Pump machines at the Regional Drinking Water Company can pump and deliver drinking water to homes for the community's needs. But in reality, pumping machines are not always 100% able to convert electrical energy into motion energy. The remnants of wasted energy are Vibration. Vibration can dama...

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In order to analyze the mathematical modeling and PID controller performance of a quadrotor, this paper firstly, describes the quadrotor flight dynamics according to âNewton-Euler lawsâ, then equations of motion linearized and transfer functions for 6 degree of freedom obtained in state space domain...

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This study presents the design and experimental testing of a two-degrees-of-freedom (2DOF) elbow prosthesis prototype designed to replicate the movement patterns of a native or normal human elbow. Two methods of the control of the prosthesis, namely, the proportional–integral–derivative method (PID;...

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In this study, we propose a rehabilitation training system that incorporates active and passive rehabilitation modes to enhance the convenience, efficacy, and safety of rehabilitation training for patients with upper limb hemiplegia. This system facilitates elbow flexion and extension as well as wri...

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Spherical gears, unlike spur gears, facilitate motion across multiple degrees of freedom. This study constructs a speed increaser utilizing a pair of spherical gears with a transmission ratio of 0.8, where the shaft angle is adjustable from 0° to 60°. Experiments measuring power are performed at rot...

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Efficient and low-loss harvesting methods are crucial for preserving the postharvest quality of the first crop of goji berries grown in saline–alkali soils. However, as a brittle horticultural fruit rich in diverse bioactive compounds, goji berries are highly vulnerable to mechanical damage during h...

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The number of freedom degrees of the separation complex comprising three rectification columns and Florentine vessel was determined. A ternary system isopropyl alcohol - acetonitrile - hexane characterized by the presence of three binary and one ternary azeotrope and a splitting area of the closed t...

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