A compliant mechanism kit with flexible beams and connectors along with analysis and optimal synthesis procedures

Limaye, Padmanabh; Ramu, Ganesan; Pamulapati, Sindhuja; Ananthasuresh, G. K.

doi:10.1016/j.mechmachtheory.2011.07.008

Cited by 25 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, for a wide variety of compliant mechanisms that are properly modeled using beam elements [15,16], the use of 2Dor 3D solid finite elements entails a huge waste of computational resources. This motivated the formulation of the IFEM for elastic beams under large deformations, presented in Albanesi et al [17].…”

Section: Introductionmentioning

confidence: 99%

A new method to design compliant mechanisms based on the inverse beam finite element model

Albanesi

Pucheta

Fachinotti

2013

Mechanism and Machine Theory

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A new method to design compliant mechanisms based on the inverse beam finite element model

Albanesi

Pucheta

Fachinotti

2013

Mechanism and Machine Theory

View full text Add to dashboard Cite

“…5. LEGO ® bricks have been widely used, especially for demonstration purposes, in a variety of scientific fields, including mechanisms [22,23], biological sciences [24], and physics [25,26]. In this research, bricks of selected size and shape can be placed at designated locations to reproduce the negative stiffness behaviour of the constructed mechanism.…”

Section: Btns Concept and Methodsmentioning

confidence: 99%

Bidirectional torsional negative stiffness mechanism for energy balancing systems

Zhang

Shaw

Amoozgar

et al. 2019

Mechanism and Machine Theory

View full text Add to dashboard Cite

A new concept of an integrated bidirectional torsional negative stiffness mechanism is introduced which allows for passive energy balancing of mechanical systems by reducing actuation requirements and improving energy efficiency. This novel design is a modular device, is bidirectional and is easily integrated and customised for different applications. The energy balance concept is achieved by employing a negative stiffness system to couple with a positive stiffness system of the mechanical system to create a zero stiffness system which can be driven with lower energy requirements. The bidirectional torsional negative stiffness mechanism proposed here uses a series of pre-compressed springs around a bidirectional torque shaft to convert decreasing force in the springs into increasing torque output through geometric reconfiguration to generate the negative stiffness characteristic. The kinematics of the negative stiffness mechanism were derived and a physical model was assembled from LEGO ® components for validation. An analytical model was developed for prediction and the numerical results showed that a satisfactory performance can be generated to match the torque requirements. An experimental demonstrator was then built and tested to verify the predictions from the analysis. To show the impact of the energy balancing concept on actuator efficiency, a representative case study is made of a tendon-driven morphing active camber mechanism. The performance of the optimised bidirectional negative stiffness device is investigated to shows an improvement by the kinematics tailoring.

show abstract

“…The rough measurement with the simple test bench still give results useful for further synthesis. Here, a more advanced tool kit (Limaye et al, 2012) could bring more exact results. Errors due to poor beam clamping and friction can be omitted.…”

Section: Synthesis Of the Compliant Beam Element Using The Elastic Simentioning

confidence: 99%

Synthesis of PR-/RP-chain-based compliant mechanisms – design of applications exploiting fibre reinforced material characteristics

et al. 2015

View full text Add to dashboard Cite

Abstract. Compliant mechanisms have several advantages, especially their smaller number of elements and therefore less movable joints. The flexural members furthermore allow an integration of special functions like balancing or locking. Synthesis methods based on the rigid body model (Howell, 2001; Sönmezv, 2008) or topology optimisation (Zhou and Mandala, 2012) provide practical applications from the advantages of compliant elements. Beside these methods, a much simpler approach is the geometric-based synthesis (Ehlig et al., 2013) which is focused on solving guidance tasks by using RR-chain1-based compliant linkages. More compact compliant linkages can be build up by using only PR2 or RP3 chains. Therefore a tool is needed to extend the RR-chain-based approach. The necessary analysis of the compliant beam element can be done by numerical analysis and through experiments. Due to the validity of the Bernoulli beam model the elastic similitude can be specialised and a more general synthesis of compliant beam elements can be created. Altogether a generalised synthesis method can be created for handling different linkage structures as well integrating beam elements derived numerically or by measurement. The advances in this method are applied in the synthesis for a cupholder mechanism made of fiber reinforced material. 1 one link with two rotational joints (R) 2 one link with one frame fixed prismatic joint (P) and one moving rotational joint (R) 3 one link with one frame fixed rotational joint (R) and one moving prismatic joint (P)

show abstract

A compliant mechanism kit with flexible beams and connectors along with analysis and optimal synthesis procedures

Cited by 25 publications

References 12 publications

A new method to design compliant mechanisms based on the inverse beam finite element model

A new method to design compliant mechanisms based on the inverse beam finite element model

Bidirectional torsional negative stiffness mechanism for energy balancing systems

Synthesis of PR-/RP-chain-based compliant mechanisms – design of applications exploiting fibre reinforced material characteristics

Contact Info

Product

Resources

About