New PKM Tricept T9000 and Its Application to Flexible Manufacturing at Aerospace Industry

Olazagoitia, José Luis; Wyatt, S.

doi:10.4271/2007-01-3820

Cited by 44 publications

(24 citation statements)

References 1 publication

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“…Metrology should be an inherent part of the build philosophy in order to overcome the problems related to positional accuracy and process constraints. 3. In terms of the use of different metrology tools, it would be desirable to conduct random, as well as regular, accuracy and uncertainty checks on the equipment used, without having to carry out in depth calibration and verification checks.…”

Section: Measurement Accuracy Tooling and Assemblymentioning

confidence: 99%

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Manufacturing and assembly automation by integrated metrology systems for aircraft wing fabrication

Jamshidi

Kayani

Iravani

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part B:

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Discrepancies of materials, tools, and factory environments, as well as human intervention, make variation an integral part of the manufacturing process of any component. In particular, the assembly of large volume, aerospace parts is an area where significant levels of form and dimensional variation are encountered. Corrective actions can usually be taken to reduce the defects, when the sources and levels of variation are known. For the unknown dimensional and form variations, a tolerancing strategy is typically put in place in order to minimize the effects of production inconsistencies related to geometric dimensions. This generates a challenging problem for the automation of the corresponding manufacturing and assembly processes. Metrology is becoming a major contributor to being able to predict, in real time, the automated assembly problems related to the dimensional variation of parts and assemblies. This is done by continuously measuring dimensions and coordinate points, focusing on the product's key characteristics. In this paper, a number of metrology focused activities for large-volume aerospace products, including their implementation and application in the automation of manufacturing and assembly processes, are reviewed. This is done by using a case study approach within the assembly of large-volume aircraft wing structures.

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Section: Measurement Accuracy Tooling and Assemblymentioning

confidence: 99%

“…This can be done through rigid orientation (rotation R and transformation T) of one of the datasets (the moving points) to the second set of data (the reference points) by using equation (3), in which R is achieved using the euclidean equation (4). The result of this calculation is shown in Table 4.…”

Section: Applicationmentioning

confidence: 99%

Manufacturing and assembly automation by integrated metrology systems for aircraft wing fabrication

Jamshidi

Kayani

Iravani

et al. 2009

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Additionally, by diagonalization of the constraint space flexibility matrix, it may be possible to effect a leg stiffness by a parallel connection of line springs and torsional springs which is a required assumption of some other methods. To illustrate the method, the Tricept [3,16,23] parallel platform and a translational parallel manipulator [5] similar to the Tripteron [24] are analyzed.…”

Section: Introductionmentioning

confidence: 99%

Stiffness of Parallel Manipulators With Serially Connected Legs

Kim

Lipkin

2014

Journal of Mechanisms and Robotics

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A simple yet general method determines the stiffness matrix for parallel manipulators with serially connected legs. Link and actuator flexibilities for each leg are modeled by flexibility matrices that are additive. The effect of passive joints is implicitly included using reciprocal screws to yield a leg stiffness matrix that is generally singular. Since the legs act in parallel the leg stiffnesses are additive and yield the manipulator stiffness. The method is applicable to overconstrained, exactly constrained, and underconstrained robots in generic or singular configurations. It is illustrated using the Tricept robot containing a passive constraint leg and an overconstrained translating manipulator. Numerical results are confirmed using commercial structural analysis software.

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“…For parallel kinematic structures, the desired position of the end effector in space is achieved by simultaneous adjustment of the lengths of driving telescopic rods. Thus, one needs to know the relationship between the position of the end effector and respective extension of driving telescopic rods [13] - [17].…”

Section: Parallel Kinematic Structure -Triceptmentioning

confidence: 99%

Theoretical Positioning Accuracy for Serial and Parallel Kinematic Structure

Kureková

Halaj²,

Omachelová³

et al. 2014

Measurement Science Review

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3Microstep spol. s.r.o, Bratislava, Slovakia, ilja@microstep-mis.skModern production machines employ complex kinematic structures that shall enhance their performance. As those machines are very sophisticated electro-mechanical structures, their design is time consuming and financially demanding. Therefore, designers search for new possibilities how to estimate future properties of the machine as early as in the design phase.The paper gives a brief introduction to the adoption of methodology of measurement uncertainties into the design of production machines. The adapted methodology enables to estimate the theoretical positioning accuracy of the machine end effector that is one of the important indicators of machine performance. Both serial and parallel kinematic structures are considered in the paper. Methodology and sample calculations of theoretical positioning accuracy are presented for serial kinematic structure (represented by advanced plasma cutting head) and parallel kinematic structure, represented by one specific design named Tricept.

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New PKM Tricept T9000 and Its Application to Flexible Manufacturing at Aerospace Industry

Cited by 44 publications

References 1 publication

Manufacturing and assembly automation by integrated metrology systems for aircraft wing fabrication

Manufacturing and assembly automation by integrated metrology systems for aircraft wing fabrication

Stiffness of Parallel Manipulators With Serially Connected Legs

Theoretical Positioning Accuracy for Serial and Parallel Kinematic Structure

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