Design of parallel kinematic systems using the planar enveloping algorithm and ADAMS computer program

Orlandea, Nicolae

doi:10.1243/1464419043541446

Cited by 4 publications

(5 citation statements)

References 3 publications

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“…The basic components of a mechanical/mechatronic system can be structured in the following way: components that bring movement → mobile bodies; components that eliminate motion → connections between bodies (when they are modeled by joints or constraint equations); components that control motion → actuating elements (when they are modeled by motion restrictions). Thus, the number of degrees of freedom is given by the following equation (Gruebler's count) [16]:…”

Section: The Analysis Flowchartmentioning

confidence: 99%

Virtual Prototyping Platform for Designing Mechanical and Mechatronic Systems

Alexandru¹

2020

Product Design

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The chapter deals with the description of a virtual prototyping platform that facilitates the design process of the mechanical and mechatronic systems. The virtual prototyping stages are defined and then integrated in a block diagram, highlighting how the data are transferred between these stages in order to finally obtain a valid and optimal virtual model, close (as structure and functionality) to the real one. The whole process is guided by the basic principle for successful virtual prototyping: as complicated as necessary and as simple as possible. The real modeling case, the specific simplifying assumptions, and the validity (viability) fields of the simplifying assumptions are discussed with reference to the main components of a mechanical or mechatronic system (bodies, connections between bodies, actuating elements). The purpose is to manipulate the simplifying assumptions in a way that reduces the complexity of the virtual model, but without altering the accuracy of the results. The basic types of analysis/simulation are depicted by considering their particularities, highlighting their role in the process of designing mechanical/mechatronic systems, and then the optimization is conducted by the use of parametric design tools. Finally, a case study is developed following those mentioned above.

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Section: The Analysis Flowchartmentioning

confidence: 99%

Virtual Prototyping Platform for Designing Mechanical and Mechatronic Systems

Alexandru¹

2020

Product Design

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“…For the kinematic analysis, where the force generating elements (as the bushings actually are) are not taken into account, the bushings are modeled as spherical joints, thus neglecting the linear (axial and radial) deformations [21]- [24]. A comprehensive structural systematization of the axle guiding mechanisms based on spherical joint assumption was presented in [21], according to the number of degrees of mobility (DOM=1 or DOM=2, by case), which can be determined by the Gruebler's count [25], [26]:…”

Section: The Kinematic Analysis Algorithmmentioning

confidence: 99%

Method for the Kinematic Analysis of the Vehicle Axle Guiding Mechanisms

Alexandru¹

2020

IJMO

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This article deals with the development of an analytical method for the kinematic analysis of the axle guiding mechanisms that are commonly used to guide the rear axles of commercial and off-road vehicles. The method can be applied / adapted for most types of axle guiding mechanisms (at least those commonly used). Unlike the most existing kinematic analysis methods, which involve the development and solving of nonlinear equation systems, with the subsequent disadvantages, the method proposed here is based on linear systems, which are easy to solve. The computation program was developed by using the programming environment Borland Delphi.

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“…Thus, if the generalized forces have the form of equation ( 7), going to singular equations is quite correct, and these equations possess a unique solution and can be written in the normal form of equations ( 8) and (9). Hence, both questions posed in section 2 are answered.…”

Section: Notementioning

confidence: 99%

“…At first glance, this drastically narrows the field of application of the results obtained because when extended structures are dealt with, the effect of elasticity is usually significant. However, rigid-body systems find application as well [8][9][10]. They are not infrequently used at the early stages of research to obtain preliminary estimates when the effect of elasticity is ignored.…”

Section: Introductionmentioning

confidence: 99%

Equations of motion for singular systems of massed and massless bodies

Zhechev

2007

Proceedings of the Institution of Mechanical Engineers, Part K:

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In many cases, mechanical systems include elements that differ greatly in inertia characteristics. It seems to be quite natural for a researcher who has to deal with such a system to have the desire to neglect its comparatively small inertia characteristics by putting them equal to zero. On such a simplification, the researcher has to do with a mechanical system that, along with 'massed' bodies (all inertia characteristics of which are distinct from zero), also includes 'massless' bodies (some inertia characteristics of which are zero). An important feature of systems of massed and massless bodies is that they may turn out to be singular. The analysis of systems of this type, in comparison with regular ones, involves some additional problems, whose solution, despite currently available methods of study of singular and singularly perturbed equations, may present a considerable challenge.In the current paper, the notion of the 'rank of a system of massed and massless bodies' is introduced, and an approach to the solution of the above problems based on this notion is proposed. This approach makes it possible to write generalized Lagrange equations for singular mechanical systems, to identify conditions for going from singularly perturbed equations of motion to singular ones to be correct, to identify conditions for the unique existence of the solution of the resulting singular equations of motion and to write them in normal form.

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Design of parallel kinematic systems using the planar enveloping algorithm and ADAMS computer program

Cited by 4 publications

References 3 publications

Virtual Prototyping Platform for Designing Mechanical and Mechatronic Systems

Virtual Prototyping Platform for Designing Mechanical and Mechatronic Systems

Method for the Kinematic Analysis of the Vehicle Axle Guiding Mechanisms

Equations of motion for singular systems of massed and massless bodies

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