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Virtual Work for a System of Connected Rigid Bodies

Virtual Work for a System of Connected Rigid Bodies

Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
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Virtual Work

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Mixed Reality for Education MRE Implementation and Results in Online Classes for Engineering

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Object Manipulation in Physically Constrained Workplaces: Remote Collaboration with Extended Reality.

Allison Bayro¹, Hongju Moon², Yalda Ghasemi³

¹School of Biological Health and Systems Engineering, Arizona State University, Tempe, AZ, USA.

IISE Transactions on Occupational Ergonomics and Human Factors

|April 2, 2025

Summary

This summary is machine-generated.

Virtual reality (VR) enhances presence and reduces physical strain in remote work compared to mixed reality (MR). VR

Keywords:

Virtual reality mixed reality physiological signals presence remote collaboration workload

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Area of Science:

Human-Computer Interaction
Occupational Health
Virtual and Mixed Reality

Background:

Extended reality (XR) technologies offer potential for remote collaboration in physically constrained workplaces.
Evaluating the impact of different XR modalities on user experience and physiological responses is crucial for effective implementation.
Understanding the trade-offs between presence, workload, and physical demands in VR versus MR is essential for ergonomic design.

Purpose of the Study:

To investigate the effects of virtual reality (VR) and mixed reality (MR) on presence, workload, object manipulation, and physiological responses.
To compare VR and MR systems in remote collaboration settings with movement constraints.
To inform the design of XR systems that optimize both productivity and worker well-being.

Main Methods:

Comparative study of VR and MR systems in simulated remote collaboration tasks.
Measurement of user sense of presence, perceived workload, and object manipulation efficiency.
Assessment of physiological responses (e.g., physical strain, fatigue indicators).

Main Results:

VR collaboration demonstrated a higher sense of presence and reduced physical movement compared to MR.
VR systems, utilizing features like teleportation, minimized physical strain.
MR systems resulted in increased objective and subjective physical demands, indicating greater potential for fatigue.

Conclusions:

VR systems may be more suitable for remote collaboration in physically constrained environments due to enhanced presence and reduced physical strain.
MR systems, while offering different interaction possibilities, impose higher physical demands that require careful consideration for worker well-being.
Future XR system design should prioritize a balance between immersive collaboration features and the minimization of physical exertion to ensure sustainable occupational applications.