Constraint-Based Limb Synthesis and Mobility-Change-Aimed Mechanism Construction

Constraint-Based Limb Synthesis and Mobility-Change-Aimed Mechanism Construction
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基于约束的肢体合成和针对运动变化的机制构建

DOI:
10.1115/1.4003920
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发表时间:
2011-05
影响因子:
3.3
通讯作者:
Gan, Dongming
Gan, Dongming
中科院分区:
工程技术3区
文献类型:
--
作者:
Caldwell, Darwin G.;Dai, Jian S.;Gan, Dongming

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本文提出了一种新的综合方法,该方法利用肢体综合的约束来针对机构构造中的运动变化进行综合。因此制造的肢体具有重新配置肢体扭转系统以改变螺杆系统顺序以实现可重构性的便利。基于最新发明的可重构钩(RT)关节,呈现了各种具有关节几何约束的可重构肢体。为了充分利用新关节的特性来生成可重构的肢体,提出了肢体合成的步骤。在此基础上,给出了构造可重构肢体变态机构的运动变化条件。这给出了一类可以在3-6范围内改变自由度的变质并联机构。提出了另一类具有中心支撑的变质并联机构。通过考察可重构虎克RT关节的相变引起的约束变化,研究了它们的拓扑构型变化。
This paper proposes a new synthesis approach by using constraints for limb synthesis to target mobility-change in the mechanism construction. The limbs therefore produced have the facility to reconfigure the limb twist-system to change the screw system order for reconfigurability. This presents various reconfigurable limbs with geometric constraints of their joints based on the newly invented reconfigurable Hook (rT) joints. The procedure of the limb synthesis is put forward to fully utilize the property of the new joint for generating the reconfigurable limbs. The paper further presents a mobility-change condition to construct a metamorphic mechanism with the reconfigurable limbs. This gives a family of metamorphic parallel mechanisms that have the facility to change mobility in the range of 3- 6. A further family of metamorphic parallel mechanisms is proposed with a central strut. Their topological configuration change is investigated by examining the constraint change stemming from the phase alteration of the reconfigurable Hooke rT joint.
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