Kineto-elastodynamic balancing of 4R-four bar mechanisms combining kinematic and dynamic stress considerations

Zobairi, M.A.K; Rao, Singiresu S.; Sahay, B. B.

doi:10.1016/0094-114x(86)90052-2

Cited by 12 publications

(6 citation statements)

References 24 publications

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“…In equation (21), M x , M y , and M z are the three coordinate components of shaking moment. M kx , M ky , and M kz refer to the three coordinate components of counter moment at connecting rack pair k; d kx , d ky , and d kz are the coordinate components of connection vector between connecting rack pair k and motion pair O.…”

Section: Analysis On Shaking Force and Shaking Momentmentioning

confidence: 99%

“…Li Zhaojun 20 constructed a coupled dynamic model of motor-elastic linkage mechanism and studied parametrically the excited vibration and resonance mechanism of the motor-elastic linkage mechanism; the author proposed a method for improving the dynamic characteristics of the mechanism by using 3D braided composites. Zhang Qinghua 21 and Zhang Minghui et al 22 studied the elastic dynamic characteristics of the parallel mechanism by using finite element method. The mechanism equilibrium is an effective method used to reduce the vibration of the mechanism.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and optimization of CAM connecting rod system in high-speed drives based on dynamic characteristics and mathematical model

Shang

Xia

Ren

2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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To explore the cause of structure vibration, this study aims to propose a kinematic equation and analyze its movement in relation to cam linkage mechanism for a jacketing machine and shearing mechanism. Finite element method is adopted to construct the kinetic model of linkage subsystem of shearing mechanism. This method can solve the inability of the shearing mechanism to accurately complete the shearing actions of the rubber hose during large vibration of the mechanism. Lumped parameter method is adopted to establish the kinetic model of the cam roller subsystem, and Newmark method is used to solve the kinetic equation of the shearing mechanism. The optimal parameters of the linking rod, cam profile, and shaking force and shaking moment of the mechanism at different rotation speeds are analyzed. Results show that rotation speed and cam profile are factors affecting the performance of the mechanism. The shaking force (shaking moment) is the main cause of the vibration of the mechanism on the rack. As such, the shaking force and shaking moment of the mechanism are selected as the objective functions of the optimization model. The node parameters of B-spline curve movement law and cross-section parameters of the linking rod are used as variables for the optimal design of the cam linkage system. Finally, the obtained optimal value is x ¼ [0.33 0.2 0.54 0.62 8.7 3.0 7.8 16.3] T .

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Section: Analysis On Shaking Force and Shaking Momentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and optimization of CAM connecting rod system in high-speed drives based on dynamic characteristics and mathematical model

Shang

Xia

Ren

2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…The geometric and cross-sectional parameters of the mechanism are referred from Ref. [12] and listed in Tables 1 and 2. The length of frame is 0.8532 m. The operating speed of crank is 80 rpm.…”

Section: Optimum Balancingmentioning

confidence: 99%

“…The KED balancing of flexible mechanisms was 0094-114X/$ -see front matter Ó 2005 Elsevier Ltd. All rights reserved. doi:10.1016/j.mechmachtheory.2004.09.002 studied firstly by Zobairi et al [12,13]. The optimum balancing or design of an elastic four-bar linkage was achieved by the way of internal mass redistribution and size reduction of link cross-sectional areas.…”

Section: Introductionmentioning

confidence: 98%

Analytical and experimental study on the dynamic balancing of flexible mechanisms

Jiang

2007

Mechanism and Machine Theory

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“…Indeed an increment of driving actions and joint reactions is somewhat expected during these transients. In addition, the presence of high transient loads may excite the system natural frequencies [10][11][12][13][14][15]. While the former phenomena may be deemed as acceptable if occurring over a small percentage of the working cycle, the latter ones might be revealed particularly critical, since high vibration levels are ordinarily detrimental for the performance of any machinery.…”

Section: Introductionmentioning

confidence: 99%

Elastodynamic Effects of Mass-Balancing: Experimental Investigation of a Four-Bar Linkage

Martini

Troncossi

Rivola

2013

Advances in Mechanical Engineering

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This paper deals with static balancing of closed-loop mechanisms. The long-term goal of the research is enhancing the performance of parallel robots by means of effective static balancing strategies that take into account the system dynamic behaviour. In this contribution, the influence of mass-balancing on the elastodynamic performance of a four-bar linkage, intended as the simplest example of closed-loop mechanism, is experimentally investigated. The design of the experimental apparatus is discussed and the results of tests on both an unbalanced linkage and its balanced variant are presented. Base-transmitted forces and vibrations are monitored for constant-speed operations and for velocity ramp tests in order to characterize the elastodynamic behaviour of the linkages. The analysis is supported by implementing a flexible multibody model of the experimental apparatus that enhances the interpretation of the experimental data.

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Kineto-elastodynamic balancing of 4R-four bar mechanisms combining kinematic and dynamic stress considerations

Cited by 12 publications

References 24 publications

Design and optimization of CAM connecting rod system in high-speed drives based on dynamic characteristics and mathematical model

Design and optimization of CAM connecting rod system in high-speed drives based on dynamic characteristics and mathematical model

Analytical and experimental study on the dynamic balancing of flexible mechanisms

Elastodynamic Effects of Mass-Balancing: Experimental Investigation of a Four-Bar Linkage

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