Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Pseudo Rigid Body Model"”.
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The Pseudo-Rigid-Body Model for Dynamic Predictions of Macro and Micro Compliant Mechanisms
… predictions of compliant mechanisms using the Pseudo-Rigid-Body model (PRBM). In order to improve the number of mechanisms that can be modeled, this research develops and identifies several key concepts in the behavior of beam segments where both ends are fixed to a rigid body (fixed-fixed …
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MOBILITY ANALYSIS AND TOPOLOGY SYNTHESIS OF COMPLIANT MECHANISM USING COMPLIANCE NUMBER AND PSEUDO-RIGID-BODY MODEL (PRBM)
… mode shapes. The compliance number (C) and the pseudo-rigid-body model (PRBM) concepts are then used to determine the degrees of freedom and the possible mode shapes for a given compliant mechanism. Furthermore, research is conducted for better characterization of the kinematic behavior of a …
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A Closed-Form Dynamic Model of the Compliant Constant-Force Mechanism Using the Pseudo-Rigid-Body Model
A mathematical dynamic model is derived for the compliant constant-force mechanism, based on the pseudo-rigid-body model simplification of the device. The compliant constant-force mechanism is a slider mechanism incorporating large-deflection beams, which outputs near-constant-force across the …
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Design and modeling of carbon nanotube-based compliant mechanisms
… ability of a conventional compliant mechanism modeling approach, the pseudo-rigid-body model, to predict the region I behavior of a nano-scale parallel guiding mechanism that uses single-walled (5,5) carbon nanotubes as the flexural elements. Van der Waals forces were found to affect the …
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On-Chip Actuation of Compliant Bistable Micro-Mechanisms
… elastic deflection of compliant segments. The pseudo-rigid-body model was used for the compliant mechanism design, and for analysis of the large-deflection flexible segments. To achieve on-chip actuation, the mechanism designs were optimized to reduce their required rotation, allow them to be …
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Design and Fabrication of Rotationally Tristable Compliant Mechanisms
… mechanisms; the work presents the creation of models and concepts for design and a demonstration of the feasibility of the designs through the fabrication of tristable compliant mechanism prototypes on the macro scale. Prior methods to achieve tristable mechanisms rely on detents, friction, or …
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Predicting the Effects of Dimensional and Material Property Variations in Micro Compliant Mechanisms
… by including static equilibrium equations and pseudo-rigid-body model relationships with the kinematic vector loop equations. Examples are used to show a comparison of this method to other deterministic and probabilistic methods and finite element analysis.</p>
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Compliant Centrifugal Clutches: Design, Analysis, and Testing
… centrifugal clutch concepts were reviewed. The pseudo-rigid-body model (PRBM), rigid-body replacement synthesis, force-deflection analysis, compliance potential evaluation, and compliant concept evaluation were used to develop effective new centrifugal clutch concepts. These methods helped …
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Large-Displacement Linear-Motion Compliant Mechanisms
… a new compliant mechanism element. It presents a pseudo-rigid-body model (PRBM) for rolling-contact compliant beams (RCC beams), a compliant element used in the RCC suspension. The loading conditions and boundary conditions for RCC beams can be simplified to an equivalent cantilever beam that has …
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Design and Analysis of End-Effector Systems for Scribing on Silicon
… stiffness. The mechanism is analyzed using the pseudo-rigid-body model and linear-elastic beam method to determine the axial stiffness, finite element methods to determine the lateral stiffness, and fatigue analysis to determine mechanism cycle life. This thesis also investigates the …
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Compliant Mechanism Suspensions
… requirements, lower number of extra joints and rigid links, and simpler design for manufacture and assembly. The stiffness, stress, and kinematic characteristics of the compliant A-Arm configuration have been explored. This configuration has a non-linear force-deflection curve that is …
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A Self-Retracting Fully-Compliant Bistable Micromechanism
… to which the mechanism is subject. SRFBM are modeled using the Pseudo-Rigid-Body Model and finite element analysis. Suitable configurations of the SRFBM concept have been identified and fabricated using the MUMPs process. Complete systems, including external actuators and electrical contacts …
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Surrogate models for the design and control of soft mechanical systems
… and sensing, and this creates challenges in modeling, design and controls. This thesis explores the use of surrogate models to approximate the complex physics between the inputs and outputs of a soft mechanical system composed of a ubiquitous soft building block known as Fiber Reinforced …
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Development and Design of Constant-Force Mechanisms
This thesis adds to the knowledge base of constant-force mechanisms (CFMs). It begins by reviewing past work done in the area of CFMs and then develops new nondimensionalized parameters that are used to simplify the calculations required to design a CFM. Comparison techniques are then developed …
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Achieving Complex Motion with Fundamental Components for Lamina Emergent Mechanisms
… the use of planar and spherical kinematics to model commonly used pop-up paper mechanisms. A survey of common joint types is given, as well as an overview of common monolithic and layered mechanisms. In addition, it is shown that more complex mechanisms may be created by combining simple …