A proposal for a convertible stadium roof structure derived from Watt-I linkage

ABSTRACT In this paper, a novel convertible stadium roof structure is introduced, which has been derived from a special geometric configuration of Watt-I linkage, a 1-DoF mechanism used in robot technologies as anthropomorphic fingers. The proposed structure can offer a wide range of different shape configurations according to the environmental conditions and spatial needs, thus offering several aesthetic and functional advantages over existing solutions. This paper serves as a feasibility investigation of this concept, mainly from geometric and structural point of view. To that affect, first kinematic analysis and geometric design of this linkage are introduced. Then, structural analyses of the proposed structure with realistic dimensions and loading conditions are performed in three different geometric configurations, in order to discuss strength and stiffness limitations. Finally, potential cover materials and actuators are briefly discussed.

[1]  Marco Ceccarelli,et al.  Optimal design of driving mechanism in a 1-DOF anthropomorphic finger , 2006 .

[2]  Guo Sheng,et al.  The DOF Degeneration Characteristics of Closed Loop Over-Constrained Mechanisms. Transactions of the Canadian Society for Mechanical Engineering , 2012 .

[3]  Charis J. Gantes,et al.  A novel adaptive spatial scissor-hinge structural mechanism for convertible roofs , 2011 .

[4]  Panos S. Shiakolas,et al.  On the Optimum Synthesis of Six-Bar Linkages Using Differential Evolution and the Geometric Centroid of Precision Positions Technique , 2005 .

[5]  Wen-Tzong Lee,et al.  On Mechanical Finger Design for Expanded Prescribed Grasping Poses , 2008 .

[6]  Robert L. Norton,et al.  Design of machinery : an introduction to the synthesis and analysis of mechanisms and machines , 1999 .

[7]  Marco Ceccarelli,et al.  Designing an underactuated mechanism for a 1 active DOF finger operation , 2009 .

[8]  Karl Wohlhart,et al.  Irregular Polyhedral Linkages , 2004 .

[9]  Marco Ceccarelli,et al.  Design Considerations for Underactuated Grasp with a one D.O.F. Anthropomorphic Finger Mechanism , 2006, 2006 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[10]  Zhong You,et al.  A New Approach to Design of Retractable Roofs , 2000 .

[11]  P. Shiakolas,et al.  On the Optimum Synthesis of Six-Bar Linkages Using Differential Evolution and the Geometric Centroid of Precision Positions Technique , 2003 .

[12]  M. Ceccarelli,et al.  Design of LARM hand: Problems and solutions , 2008, 2008 IEEE International Conference on Automation, Quality and Testing, Robotics.

[13]  Gim Song Soh,et al.  The synthesis of six-bar linkages as constrained planar 3R chains , 2008 .

[14]  Wen-Tzong Lee,et al.  ON MOTION GENERATION OF WATT I MECHANISMS FOR MECHANICAL FINGER DESIGN , 2008 .

[15]  Chanakya Arya,et al.  Eurocode 3: Design of steel structures , 2018, Design of Structural Elements.

[16]  A. Cardona,et al.  Synthesis of Planar Multiloop Linkages Starting from Existing Parts or Mechanisms: Enumeration and Initial Sizing , 2008 .

[17]  John McPhee,et al.  Automated Kinematic Synthesis of Planar Mechanisms with Revolute Joints , 2007 .

[18]  Marco Ceccarelli,et al.  Experimental Tests on Feasible Operation of a Finger Mechanism in the LARM Hand , 2008 .

[19]  Jian S. Dai,et al.  Geometric Analysis and Optimization of a Symmetrical Watt Six-Bar Mechanism , 1991 .

[20]  Raymond J. Cipra,et al.  Assembly configurations of planar multi-loop mechanisms with kinematic limitations , 2006 .

[21]  Marco Ceccarelli,et al.  A Numerical Simulation for Design and Operation of an Underactuated Finger Mechanism for LARM Hand , 2009 .

[22]  Charis J. Gantes,et al.  A novel concept of convertible roofs with high transformability consisting of planar scissor-hinge structures , 2010 .

[23]  Todor Todorov.  Synthesis of Watt's six-link mechanism for manipulation action in relative space , 1997 .

[24]  Kristin Decker.  Mechanisms In Modern Engineering Design , 2016 .

[25]  Kenneth R. Currie,et al.  Stretch rotation and complete mobility identification of Watt six-bar chains , 2009 .