Retraction of “Mechanical Reconfiguration of Stereoisomers”

2015 ◽  
Vol 137 (9) ◽  
pp. 3428-3428 ◽  
Author(s):  
Kelly M. Wiggins ◽  
Todd W. Hudnall ◽  
Qilong Shen ◽  
Matthew J. Kryger ◽  
Jeffrey S. Moore ◽  
...  
Keyword(s):  
Mechanical Reconfiguration

scholarly journals Multi-modal reconfigurable robotic platform with 3d-immersive telepresence system

2021 ◽  
Author(s):  
Mohammad Mehrabi
Keyword(s):  
Outer Space ◽  
Robotic Platform ◽  
The Past ◽  
Reconfigurable Robots ◽  
Hazardous Environments ◽  
Reconfigurable Platform ◽  
Mechanical Reconfiguration

The concept of reconfigurability and its applications in robotics have become prominent in the past few years as they provide versatility, adaptability and scalability to the systems. The reconfigurable robots can perform tasks in outer space, under the sea and in hazardous environments by rearranging their physical configurations to alter the system’s behavior and geometry. However, the concept of reconfigurable robots is not just constrained by the mechanical reconfiguration of the components, for the system should also demonstrate a modular reconfigurable behavior to newly imposed conditions. The objective of this work was to design and implement a multi-modal reconfigurable platform based on the concept of “form follows function” to be integrated with 3D-Immersive telepresence systems. The developed system was analyzed to verify the feasibility and functionality of the proposed architecture, and suggestions were made for future improvements.

Optomechanical nanoantenna: far-field control of near-field through mechanical reconfiguration

2015 ◽  
Author(s):  
Alireza Bonakdar ◽  
Robert L. Brown ◽  
Sung Jun Jang ◽  
Vala Fathipour ◽  
Iman Hassani Nia ◽  
...  
Keyword(s):  
Near Field ◽  
Far Field ◽  
Field Control ◽  
Mechanical Reconfiguration

Post-synthesis modification of slide-ring gels for thermal and mechanical reconfiguration

Soft Matter ◽  
2021 ◽  
Author(s):  
Karan Vivek Dikshit ◽  
Carson J. Bruns
Keyword(s):  
Structural Parameters ◽  
Post Synthesis ◽  
Mechanical Reconfiguration

Ring-sliding behavior in polyrotaxanes imbues gels, elastomers, and glasses with remarkable stress-dissipation and actuation properties. Since these properties can be modulated and tuned by structural parameters, many efforts have been...

Mechanical reconfiguration mediates swallowing and rejection in Aplysia californica

2006 ◽  
Vol 192 (8) ◽  
pp. 857-870 ◽  
Author(s):  
Valerie A. Novakovic ◽  
Gregory P. Sutton ◽  
David M. Neustadter ◽  
Randall D. Beer ◽  
Hillel J. Chiel
Keyword(s):  
Aplysia Californica ◽  
Mechanical Reconfiguration

scholarly journals Multi-modal reconfigurable robotic platform with 3d-immersive telepresence system

2021 ◽  
Author(s):  
Mohammad Mehrabi
Keyword(s):  
Outer Space ◽  
Robotic Platform ◽  
The Past ◽  
Reconfigurable Robots ◽  
Hazardous Environments ◽  
Reconfigurable Platform ◽  
Mechanical Reconfiguration

The concept of reconfigurability and its applications in robotics have become prominent in the past few years as they provide versatility, adaptability and scalability to the systems. The reconfigurable robots can perform tasks in outer space, under the sea and in hazardous environments by rearranging their physical configurations to alter the system’s behavior and geometry. However, the concept of reconfigurable robots is not just constrained by the mechanical reconfiguration of the components, for the system should also demonstrate a modular reconfigurable behavior to newly imposed conditions. The objective of this work was to design and implement a multi-modal reconfigurable platform based on the concept of “form follows function” to be integrated with 3D-Immersive telepresence systems. The developed system was analyzed to verify the feasibility and functionality of the proposed architecture, and suggestions were made for future improvements.

scholarly journals Energy-Based Limit Cycle Compensation for Dynamically Balancing Wheeled Inverted Pendulum Machines

2013 ◽  
Author(s):  
Hari Vasudevan ◽  
Aaron M. Dollar ◽  
John B. Morrell
Keyword(s):  
Limit Cycle ◽  
Limit Cycles ◽  
Inverted Pendulum ◽  
Control Design ◽  
Rolling Friction ◽  
Drive Train ◽  
Wheeled Inverted Pendulum ◽  
Energy Behavior ◽  
Mechanical Reconfiguration ◽  
Second Period

In this paper we present an energy-based algorithm to minimize limit cycles in dynamically balancing wheeled inverted pendulum (IP) machines. Because the algorithm is not based on the numerical value of parameters, performance is robust and accounts for mechanical reconfiguration and wear. The effects of phenomena such as drive-train friction, rolling friction, backlash and sensor bandwidth are well known, causing either limit cycles or instabilities in IP balancing machines and yet compensation or control design to mitigate these effects are not well known. The effects of these non-linearities can be observed in the energy behavior of IP balancing machines, hence, as a broader goal we seek to establish an energy-based framework for the investigation of non-linearities in this class of machines. We successfully demonstrate the effectiveness of our algorithm on a two-wheeled IP balancing machine, “Charlie”, developed in our laboratory. As an example we show a reduction in the amplitude of limit cycles by 95.9% in wheel angle and 89.8% in pitch over a 10 second period.

Tunable and Active Phononic Crystals and Metamaterials

2020 ◽  
Vol 72 (4) ◽  
Author(s):  
Yan-Feng Wang ◽  
Yi-Ze Wang ◽  
Bin Wu ◽  
Weiqiu Chen ◽  
Yue-Sheng Wang
Keyword(s):  
Phononic Crystals ◽  
Wave Functions ◽  
Ordered Structure ◽  
Bandgap Engineering ◽  
Future Directions ◽  
Unit Cells ◽  
Diverse Application ◽  
Recent Developments ◽  
Regulation Mechanisms ◽  
Mechanical Reconfiguration

Abstract Phononic crystals (PCs) and metamaterials (MMs) can exhibit abnormal properties, even far beyond those found in nature, through artificial design of the topology or ordered structure of unit cells. This emerging class of materials has diverse application potentials in many fields. Recently, the concept of tunable PCs or MMs has been proposed to manipulate a variety of wave functions on demand. In this review, we survey recent developments in tunable and active PCs and MMs, including bandgap and bandgap engineering, anomalous behaviors of wave propagation, as well as tunable manipulation of waves based on different regulation mechanisms: tunable mechanical reconfiguration and materials with multifield coupling. We conclude by outlining future directions in the emerging field.

Design and Implementation of a PKM Based 5-Axis Reconfigurable Machine

2005 ◽  
Author(s):  
Peter E. Orban ◽  
Zhuming M. Bi ◽  
Y. T. Lang ◽  
Marcel Verner
Keyword(s):  
Control System ◽  
Degrees Of Freedom ◽  
Production Quality ◽  
Open Architecture ◽  
Actual State ◽  
Constant Length ◽  
Design And Implementation ◽  
High Production ◽  
Mechanical Reconfiguration ◽  
High Production Quality

In this paper we present the design and implementation of a parallel kinematics based reconfigurable machine. The machine utilizes a Tripod based module with 3 degrees-of-freedom combined with a linear X-Y stage and gantry system for 5-axis machining. The tripod module uses a unique passive link mechanism with constant length leg actuators. This architecture offers good stiffness and high accuracy. The gantry system itself is reconfigurable, allowing for changing the working characteristics of the machine. The control system is based on open architecture principles. Corresponding to the mechanical reconfiguration, the control system also needs to be reconfigured to reflect the actual state of the machine. Mechanical reconfiguration also brings with it the need to verify the accuracy of the new configuration. Also discussed in the paper is the calibration methodology that ensures high production quality in each configured mode of the machine.

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