Optimal layout and reconfiguration of a fixturing system constructed from passive Stewart platforms

Gašpar, Timotej; Kovac, Igor; Ude, Aleš

doi:10.1016/j.jmsy.2021.05.020

Cited by 15 publications

(5 citation statements)

References 40 publications

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“…The loading device consists of a fixed frame (1), a fixed platform (2), a moving platform (7), some upper and lower spherical joints (3), six servo motors (4), six electric cylinders (5), the six-dimensional force measurement module (6), and other accessories. The core of the six-dimensional force measurement module is six tension-compression sensors embedded in six legs of the loading device.…”

Section: Hardware Composition Of the Systemmentioning

confidence: 99%

“…the position of negative reflector [3]; Xu successfully carried out the optical alignment of optoelectronic devices with large stroke parallel platform [4]; Galván-Pozos established the motion equation and used Stewart Gough platform to track the sea free surface elevation [5]. The parallel mechanism is also used in indoor simulation experiment, six-dimensional force sensor, medical machine, and many other applications [6][7][8][9].…”

Section: Introducementioning

confidence: 99%

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A novel 6-dimensional force measurement based on the electric 6-DOF loading device

Sang,

Liao,

Chen

et al. 2024

Meas. Sci. Technol.

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The 6-degrees-of-freedom (6-DOF) platform has gained popularity in industry owing to its advantages, especially in indoor simulation experiment requiring 6-dimensional force environments. However, up to date, the measurement of such 6-dimensional forces is challenging due to complex structures, difficult decoupling, and high costs. In this study, an electric 6-DOF loading device designed by ourselves is presented, with an ability to load high precision displacement and force. To measure the 6-dimensional force of the device’s moving platform, this paper proposes a scheme involving embedding tension-compression sensors in each leg of the device and describes the mechanical model of the device. Then a novel method with a variable transformation matrix is proposed, complemented by a decoupling study that optimizes the variable transformation matrix. Finally, we validate the proposed method through an external force loading experiment. The results indicate that the error in Fy experiment is less than 2.7%, and the error in Fz experiment is less than 1.6%. The novel method exhibits high accuracy, easy installation, fast response, and low cost.

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Section: Hardware Composition Of the Systemmentioning

confidence: 99%

Section: Introducementioning

confidence: 99%

A novel 6-dimensional force measurement based on the electric 6-DOF loading device

Sang,

Liao,

Chen

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The authors of [20] presented a constrained nonlinear optimization problem to determine an optimal layout of reconfigurable fixtures for specific workpieces. Considering the kinematic limitations of Stewart platforms and workpiece characteristics, the experimental results confirmed that the automatically computed layouts satisfied typical production constraints effectively.…”

Section: Literature Reviewmentioning

confidence: 99%

Performance Evaluation of Reconfiguration Policy in Reconfigurable Manufacturing Systems including Multi-Spindle Machines: An Assessment by Simulation

Renna

2024

Applied Sciences

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Reconfigurable manufacturing systems (RMSs) are extensively studied and employed to address demand uncertainties. RMS machines are designed to be modular and adaptable to changing requirements. A recent innovation is the introduction of multi-spindle reconfigurable machines (MRMTs). This study evaluates the impact of MRMTs’ introduction into an RMS, considering factors such as the number of MRMT machines and reconfiguration policies. A simulation model incorporating failures, process time variability, and part inter-arrival supports the analysis. The numerical results aid decision makers in determining the optimal RMS configuration with MRMTs. The simulation outcomes indicate that a balanced number of multi-spindle machines can significantly enhance performance compared with an unbalanced distribution.

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“…When deploying multiple hexapods to mount a set of different workpieces, it is necessary to determine optimal base locations and top plate postures. Determining such a layout can be a tedious and time-consuming task, which becomes especially difficult where multiple workpieces with multiple anchor points need to be firmly positioned in the work cell [25]. An example fixturing system with three hexapods holding two different workpieces can be seen in Figure 1.…”

Section: Optimal Locations and Postures Of Reconfigurable Fixturesmentioning

confidence: 99%

Technology Modules Providing Solutions for Agile Manufacturing

Deniša,

Ude,

Simonič

et al. 2023

Machines

Self Cite

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In this paper, we address the most pressing challenges faced by the manufacturing sector, particularly the manufacturing of small and medium-sized enterprises (SMEs), where the transition towards high-mix low-volume production and the availability of cost-effective solutions are crucial. To overcome these challenges, this paper presents 14 innovative solutions that can be utilized to support the introduction of agile manufacturing processes in SMEs. These solutions encompass a wide range of key technologies, including reconfigurable fixtures, low-cost automation for printed circuit board (PCB) assembly, computer-vision-based control, wireless sensor networks (WSNs) simulations, predictive maintenance based on Internet of Things (IoT), virtualization for operator training, intuitive robot programming using virtual reality (VR), autonomous trajectory generation, programming by demonstration for force-based tasks, on-line task allocation in human–robot collaboration (HRC), projector-based graphical user interface (GUI) for HRC, human safety in collaborative work cells, and integration of automated ground vehicles for intralogistics. All of these solutions were designed with the purpose of increasing agility in the manufacturing sector. They are designed to enable flexible and modular manufacturing systems that are easy to integrate and use while remaining cost-effective for SMEs. As such, they have a high potential to be implemented in the manufacturing industry. They can be used as standalone modules or combined to solve a more complicated task, and contribute to enhancing the agility, efficiency, and competitiveness of manufacturing companies. With their application tested in industrially relevant environments, the proposed solutions strive to ensure practical implementation and real-world impact. While this paper presents these solutions and gives an overview of their methodologies and evaluations, it does not go into their details. It provides summaries of comprehensive and multifaceted solutions to tackle the evolving needs and demands of the manufacturing sector, empowering SMEs to thrive in a dynamic and competitive market landscape.

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Optimal layout and reconfiguration of a fixturing system constructed from passive Stewart platforms

Cited by 15 publications

References 40 publications

A novel 6-dimensional force measurement based on the electric 6-DOF loading device

A novel 6-dimensional force measurement based on the electric 6-DOF loading device

Performance Evaluation of Reconfiguration Policy in Reconfigurable Manufacturing Systems including Multi-Spindle Machines: An Assessment by Simulation

Technology Modules Providing Solutions for Agile Manufacturing

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