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Recent Advances in Mechanical Systems Dynamics

A topical collection in Applied Sciences (ISSN 2076-3417). This collection belongs to the section "Mechanical Engineering".

Viewed by 5125

Editor

Topical Collection Information

Dear Colleagues,

Mechanical systems today are increasingly integrated with electronic, electrical, and fluidic systems. This trend is present not only in the industrial environment, which will be characterized soon by the cyber-physical systems of industry 4.0, but also in other environments such as automotive technology, rehabilitation and bioengineering, smart materials, and domotics. In this context, purely mechanical systems with a quasistatic behavior will become less common and the state of the art will be represented soon by integrated mechanical systems, which need accurate dynamic models to predict their behavior. Therefore, mechanical system dynamics is going to play an increasingly central role. Significant research efforts are needed to improve the identification of mechanical properties of the systems, to develop models taking into account nonlinearity, and to develop efficient simulation tools. This Topical Collection aims at disseminating the latest research achievements, findings, and ideas in mechanical systems dynamics with particular emphasis on the applications which are strongly integrated with other systems and require a multiphysical approach.

Papers are welcome on topics that are related to theory, practice, and applications of mechanical systems dynamics, including but not limited to the following:

  • The identification and dynamics of multibody systems;
  • The dynamics of automatic machinery;
  • Dynamics stability and control of vehicles;
  • The dynamics and control of robots;
  • Innovative robots;
  • Medical robotics (surgery, rehabilitation);
  • The dynamics of multiphysics systems;
  • The dynamics of energy harvesters.

Prof. Dr. Alberto Doria
Collection Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the collection website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • dynamics
  • multiphysics systems
  • vehicle dynamics
  • robot
  • multibody

Published Papers (3 papers)

2023

Jump to: 2022

18 pages, 8601 KiB  
Article
Dynamics of a 3-UPS-UPU-S Parallel Mechanism
by Jing-Shan Zhao, Song-Tao Wei and Xiao-Cheng Sun
Appl. Sci. 2023, 13(6), 3912; https://doi.org/10.3390/app13063912 - 19 Mar 2023
Cited by 2 | Viewed by 1118
Abstract
In this paper, a parallel mechanism with two rotational degrees of freedom is proposed. It could rotate freely and continuously around the two coordinate axes at the fixed origin of the coordinate frame. The structure of the mechanism is a second-order over constraint [...] Read more.
In this paper, a parallel mechanism with two rotational degrees of freedom is proposed. It could rotate freely and continuously around the two coordinate axes at the fixed origin of the coordinate frame. The structure of the mechanism is a second-order over constraint parallel structure and the moving platform and base platform are connected by five kinematic chains. The motion characteristics of this structure are analyzed by reciprocal screw equation. Then, the kinematics and dynamics modelling are carried out systematically in a unified way. The kinematics of the mechanism is established by means of screws, the displacements and accelerations of each joint and any point on a link could be calculated by the kinematic screw equation directly. The analysis of acceleration and its mathematical expression in screw form are given, and the acceleration matrix could be applied into the dynamic analysis based on the Newton–Euler equation. All the constraint forces and torques could be obtained by a single set of Newton–Euler equations. Full article
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2022

Jump to: 2023

17 pages, 6084 KiB  
Article
Determination of Continuous Earthmoving Machinery Course Stability under the Conditions of Cyclic Lateral Loading
by Miroslaw Smieszek, Volodymyr Musiiko, Vasyl Mateichyk, Mykola Tsiuman, Andrii Koval and Jakub Mościszewski
Appl. Sci. 2022, 12(14), 7029; https://0-doi-org.brum.beds.ac.uk/10.3390/app12147029 - 12 Jul 2022
Viewed by 981
Abstract
This article presents the results of complex theoretical and experimental studies on creating universal continuous earthmoving machinery operating under non-standard loading conditions, namely, cyclic lateral loading on the actuator during digging. The lateral loading is due to the complex nature of the actuator [...] Read more.
This article presents the results of complex theoretical and experimental studies on creating universal continuous earthmoving machinery operating under non-standard loading conditions, namely, cyclic lateral loading on the actuator during digging. The lateral loading is due to the complex nature of the actuator motion when digging the soil, namely, the longitudinal motion of the machinery, the actuator digging the soil, and the lateral reciprocating motion of the actuator. This allows for variable width excavations in the soil, whose width exceeds the width of the actuator. The key issue of this machinery operation is to provide its course stability. The article considers the choice of soil-developing actuator and shows the developed calculation schemes of external loading on the operating equipment and a base tractor when digging long excavations in the soil. The dependencies to define external forces acting on the actuator when digging the soil and determining the machinery course stability, considering their spatial nature, have been developed and suggested for practical use. The conditions to ensure the stability of the course of universal earthmoving machinery have been formulated and substantiated. The developed method for determining course stability can be used when creating industrial samples of trenching earthmoving machinery. Full article
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22 pages, 2102 KiB  
Article
Vibration Energy Harvesting from Raindrops Impacts: Experimental Tests and Interpretative Models
by Ilaria Palomba, Alberto Doria, Edoardo Marconi, Matteo Bottin and Giulio Rosati
Appl. Sci. 2022, 12(7), 3249; https://0-doi-org.brum.beds.ac.uk/10.3390/app12073249 - 23 Mar 2022
Cited by 3 | Viewed by 2282
Abstract
The kinetic energy of raindrops is a large and renewable source of energy that nowadays can be exploited by means of piezoelectric harvesters. This study focuses on a new cantilever harvester that uses the impact of a drop on a liquid surface created [...] Read more.
The kinetic energy of raindrops is a large and renewable source of energy that nowadays can be exploited by means of piezoelectric harvesters. This study focuses on a new cantilever harvester that uses the impact of a drop on a liquid surface created on the harvester in order to improve the conversion from kinetic energy to electric energy. Experimental tests, carried out both outdoors and indoors, were performed to assess the validity of the proposed design. The voltage obtained with the impact on the liquid surface was about four times larger than the one obtained with the impact on a dry surface. The phenomena that lead to the increased performance of the harvester were analyzed both experimentally, by means of a high-speed camera, and analytically, by means of a mathematical model. The camera footage showed a clear relationship between the waveform of the generated voltage and the various phases of the impact (crown formation, crown collapse, and sloshing). The mathematical model developed herein, which was based on the oscillation of the liquid mass caused by the impact and on the linear momentum equation, is simple and can be used to estimate the measured voltage within a good approximation. Full article
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