Computer-aided simulation and testing of spatial linkages with joint mechanical errors

Pezzuti, E; Stefanelli, R.; Valentini, P; Vita, L.

doi:10.1002/nme.1507

Cited by 15 publications

(13 citation statements)

References 13 publications

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“…The joint forces arise only when the surfaces of the hole and the pin come in contact and this means that the characteristic of the coupling is highly nonlinear. According to [9], the 3D contact between a pin and a hole can alternatively occurs in one point at one end, in two points at both ends or along a ruling (see Fig. 1).…”

Section: Three-dimensional Joint Modelingmentioning

confidence: 99%

“…In 2005, Valentini et al [8] proposed a modeling of hydrodynamic journal bearing in spatial multibody systems, in which both rotational and squeeze effects together with tilting effect have been taken into account. One year later, Valentini et al [9] discussed a methodology based on a kinematic approach using the dual-algebra fundamentals to simulate the presence of joint with clearance in generic multibody systems. This methodology has been applied to an industrial case of an automotive transmission of a Cardan coupling.…”

Section: Introductionmentioning

confidence: 99%

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Modeling 3D revolute joint with clearance and contact stiffness

2011

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The clearances in the kinematic joints are due to deformations, wear, and manufacturing errors; the accurate modeling of these effects in multibody analysis is a complex issue but in many practical applications, it is mandatory to take into them into account in order to understand the actual behavior of mechanical systems. In this paper, the authors present a general computer-aided model of a 3D revolute joint with clearance suitable for implementation in multibody dynamic solvers. While a perfect revolute joint imposes kinematic constraints, the proposed revolute joint with clearance leads to a force constraint. The revolute joint has been modeled by introducing a nonlinear equivalent force system, which takes into account the contact elastic deformations. The model depends on the structural and geometrical properties of materials in contact that have been investigated using finite element models. The purpose is to give a general approach to study the influence of actual joints on kinematic, dynamic, and structural behavior of mechanisms. The proposed model has been applied in dynamic simulations of a spatial slider-crank mechanism.

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Section: Three-dimensional Joint Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling 3D revolute joint with clearance and contact stiffness

2011

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“…An accurate and comprehensive design should take into account all these complications by trying to prevent or control them. A study on the influence of the errors and the compliance effects in the mechanisms is fundamental for an accurate design and a specific allocation of the tolerances in manufacturing, as testified by several contributions in different fields (see, for example, the papers by Brutti et al, 4 Pezzuti et al 5 and Valentini 6 ). Numerical models have been widely used for addressing the investigations in many fields of mechanical transmissions.…”

Section: Introductionmentioning

confidence: 99%

Effects of the dimensional and geometrical tolerances on the kinematic and dynamic performances of the Rzeppa ball joint

Valentini

2013

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this paper the influences of some relevant dimensional and geometrical errors on both the kinematic performance and the dynamic performance of an automotive Rzeppa ball joint were investigated. The study focused on the development of a dedicated and improved multi-body three-dimensional model of the joint and the corresponding numerical simulations of different configurations. The model is able to manage the presence of the redundant constraints which are present in the joint architecture because of the use of spring connections between parts which replace most of the kinematic constraints or geometrical contact conditions. Three types of error were investigated, and both kinematic irregularities and dynamic irregularities are reported in graphs and discussed. The effects of different articulation angles between the inner ring and the outer ring were also investigated.

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“…(11) and (12) with a least squares method; (4) modify the value of d adopting a manufacturing standard; (5) check the value of the new natural frequency and apply the failure theory again. Tables 1-3 provide the data for a test mechanism.…”

Section: Springmentioning

confidence: 99%

“…[10], Valentini et al proposed a modeling of hydrodynamic journal bearing in spatial multibody systems, in which both rotational and squeeze effects together with tilting effect have been taken into account. One year later, Valentini et al [11] discussed a methodology based on a kinematic approach using the dual-algebra fundamentals to simulate the presence of joint with clearance in generic multibody systems. This methodology has been applied to an industrial case of an automotive transmission of a Cardan coupling.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a High-Speed Deployment Slider–Crank Mechanism: A Design Charts Approach

Mariti

Mucino

Pennestrı̀

et al. 2014

Journal of Mechanical Design

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Mechanical and aerospace applications often require that mechanisms deploy in a quick stable and reliable way. The objective of this study is to implement a general optimization procedure to perform a first stage conceptual design of HSD mechanisms, focusing on both kinematics and dynamics. In particular, the authors will focus on the development of design charts. In the very first part of the work, a parametric lumped-mass system will be modeled in order to reduce the number of parameters for the synthesis phase. A correlation will be established between geometry, inertia and initial position to guarantee the maximum value of acceleration during deployment of the deployable arm by means of the principle of virtual work. In the second part of this work, the influence of important factors such as friction and joint clearance on the overall dynamics of the system will be investigated. Finally, a coupled dynamic and structural analysis of the helical spring, that actuates the mechanism, will be carried out in order to achieve optimal performance. The developed charts will also take into account the space limitation requirement, that are often needed for both aerospace and mechanical applications. A final example will summarize all the points covered by this research effort. Results will be validated using the commercial software ABAQUS.

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Computer-aided simulation and testing of spatial linkages with joint mechanical errors

Cited by 15 publications

References 13 publications

Modeling 3D revolute joint with clearance and contact stiffness

Modeling 3D revolute joint with clearance and contact stiffness

Effects of the dimensional and geometrical tolerances on the kinematic and dynamic performances of the Rzeppa ball joint

Optimization of a High-Speed Deployment Slider–Crank Mechanism: A Design Charts Approach

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