A Spline-Like Haptic Tool for Exploration and Modification of Digital Models With Aesthetic Value

2010 ◽  
Author(s):  
Mario Covarrubias ◽  
Michele Antolini ◽  
Monica Bordegoni ◽  
Umberto Cugini
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Virtual Object ◽  
Virtual Reality Environment ◽  
Aesthetic Value ◽  
Input Devices ◽  
Continuous Contact ◽  
Touch Sensor ◽  
Additional Input ◽  
Physical Prototype

This paper describes a multimodal system whose aim is to replicate in a virtual reality environment some typical operations performed by professional designers with real splines laid over the surface of a physical prototype of an aesthetic product, in order to better evaluate the characteristics of the shape they are creating. The system described is able not only to haptically render a continuous contact along a curve, by means of a servo controlled haptic strip, but also to allow the user to modify the shape applying force directly on the haptic device. The haptic strip is able to bend and twist in order to better approximate the portion of the surface of the virtual object over which the strip is laying. This device is 600mm long and is controlled by 11 digital servos for the control of the shape (6 for bending and 5 for twisting) and by two MOOG-FCS HapticMaster devices and two additional digital servos for 6-DOF positioning. We have developed additional input devices, which have been integrated with the haptic strip, which consist of two force sensitive handles positioned at the extremities of the strip, and a capacitive linear touch sensor placed along the surface of the strip, and four buttons. These devices are used to interact with the system, to select menu options, and to apply deformations to the virtual object. The paper describes the interaction modalities and the developed user interface, the applied methodologies, the achieved results and the conclusions elicited from the user tests.

scholarly journals Kinematic of the Position and Orientation Synchronization of the Posture of a n DoF Upper-Limb Exoskeleton with a Virtual Object in an Immersive Virtual Reality Environment

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1069
Author(s):  
Deyby Huamanchahua ◽  
Adriana Vargas-Martinez ◽  
Ricardo Ramirez-Mendoza
Keyword(s):  
Virtual Reality ◽  
Upper Limb ◽  
Human Performance ◽  
Early Stage ◽  
Inverse Kinematic ◽  
Virtual Object ◽  
Immersive Virtual Reality ◽  
Virtual Reality Environment ◽  
Upper Limb Exoskeleton ◽  
Position And Orientation

Exoskeletons are an external structural mechanism with joints and links that work in tandem with the user, which increases, reinforces, or restores human performance. Virtual Reality can be used to produce environments, in which the intensity of practice and feedback on performance can be manipulated to provide tailored motor training. Will it be possible to combine both technologies and have them synchronized to reach better performance? This paper consists of the kinematics analysis for the position and orientation synchronization between an n DoF upper-limb exoskeleton pose and a projected object in an immersive virtual reality environment using a VR headset. To achieve this goal, the exoskeletal mechanism is analyzed using Euler angles and the Pieper technique to obtain the equations that lead to its orientation, forward, and inverse kinematic models. This paper extends the author’s previous work by using an early stage upper-limb exoskeleton prototype for the synchronization process.

scholarly journals Integrating Virtual Reality and Augmented Reality in a Collaborative User Interface

2019 ◽  
Vol 9 (2) ◽  
Author(s):  
Muhammad Nur Affendy Nor'a ◽  
Ajune Wanis Ismail
Keyword(s):  
Virtual Reality ◽  
User Interface ◽  
Augmented Reality ◽  
Virtual Space ◽  
Virtual Object ◽  
Interaction Technique ◽  
Gesture Interaction ◽  
Data Interchange ◽  
Shared Space ◽  
Server Architecture

Application that adopts collaborative system allows multiple users to interact with other users in the same virtual space either in Virtual Reality (VR) or Augmented Reality (AR). This paper aims to integrate the VR and AR space in a Collaborative User Interface that enables the user to cooperate with other users in a different type of interfaces in a single shared space manner. The gesture interaction technique is proposed as the interaction tool in both of the virtual spaces as it can provide a more natural gesture interaction when interacting with the virtual object. The integration of VR and AR space provide a cross-discipline shared data interchange through the network protocol of client-server architecture.

scholarly journals New approach of designing robotics production systems using immersive virtual reality environment

2021 ◽  
Vol 343 ◽  
pp. 08001
Author(s):  
Radovan Holubek ◽  
Róbert Bočák ◽  
Vanessa Prajová
Keyword(s):  
Virtual Reality ◽  
Development Process ◽  
Production Systems ◽  
Robotic Systems ◽  
Virtual Reality Environment ◽  
New Approach ◽  
3D Objects ◽  
Engineering Data ◽  
Physical Prototype ◽  
Complex Engineering

Production requirements are growing and companies needs to adapt to the latest trends with state-of-art technologies. Virtual reality (VR) technology promises big changes in Industry sector, even this technology is still evolving. This immersive technology allows to visualization and interaction of complex engineering data in virtual environment, provide various inspection of 3D objects and allows to communicate changes on objects or process between production teams and customers. This paper discus about potential of VR systems in Industry and purpose of usage to improve development process and the use of this technology in the design of future robotic systems. The goal is to compare causal designing methods of robotic work station and method with using VR environment and their possibilities. Development supported by VR systems shortens preproduction phase and brings to user immersive experience with designing product or process without creating physical prototype or real production systems.

scholarly journals Virtual Realism: Really Realism or only Virtually so? A Comment on D. J. Chalmers’s Petrus Hispanus Lectures

Disputatio ◽  
2019 ◽  
Vol 11 (55) ◽  
pp. 297-331
Author(s):  
Claus Beisbart
Keyword(s):  
Virtual Reality ◽  
Computer Simulations ◽  
Real Object ◽  
Virtual Object ◽  
Digital Object ◽  
Virtual Reality Environment ◽  
Virtual Objects ◽  
The Status ◽  
Digital Objects ◽  
Scientific Computer

AbstractWhat is the status of a cat in a virtual reality environment? Is it a real object? Or part of a fiction? Virtual realism, as defended by D. J. Chalmers, takes it to be a virtual object that really exists, that has properties and is involved in real events. His preferred specification of virtual realism identifies the cat with a digital object. The project of this paper is to use a comparison between virtual reality environments and scientific computer simulations to critically engage with Chalmers’s position. I first argue that, if it is sound, his virtual realism should also be applied to objects that figure in scientific computer simulations, e.g. to simulated galaxies. This leads to a slippery slope because it implies an unreasonable proliferation of digital objects. A philosophical analysis of scientific computer simulations suggests an alternative picture: The cat and the galaxies are parts of fictional models for which the computer provides model descriptions. This result motivates a deeper analysis of the way in which Chalmers builds up his realism. I argue that he buys realism too cheap. For instance, he does not really specify what virtual objects are supposed to be. As a result, rhetoric aside, his virtual realism isn’t far from a sort of fictionalism.

Top-Down Processing and Visual Reorientation Illusions in a Virtual Reality Environment

2004 ◽  
Vol 63 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Fred W. Mast ◽  
Charles M. Oman
Keyword(s):  
Virtual Reality ◽  
Visual Processing ◽  
Line Length ◽  
Perceptual Cues ◽  
Virtual Reality Environment ◽  
Top Down ◽  
Test Conditions ◽  
The Subject ◽  
Processing Mechanisms

The role of top-down processing on the horizontal-vertical line length illusion was examined by means of an ambiguous room with dual visual verticals. In one of the test conditions, the subjects were cued to one of the two verticals and were instructed to cognitively reassign the apparent vertical to the cued orientation. When they have mentally adjusted their perception, two lines in a plus sign configuration appeared and the subjects had to evaluate which line was longer. The results showed that the line length appeared longer when it was aligned with the direction of the vertical currently perceived by the subject. This study provides a demonstration that top-down processing influences lower level visual processing mechanisms. In another test condition, the subjects had all perceptual cues available and the influence was even stronger.

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