Output Feedback Control of Wind Display in a Virtual Environment

Kulkarni, Sandip D.; Minor, Mark A.; Deaver, M.W.; Pardyjak, Eric R.

doi:10.1109/robot.2007.363089

Cited by 12 publications

(27 citation statements)

References 18 publications

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“…In [12][13][14]20], the CFD based input-output maps are developed in terms of v TOT and v LR . Wind speed at the user is mapped based upon v TOT and wind angle is mapped in terms of v LR .…”

Section: Control Systemmentioning

confidence: 99%

“…V act and θ act are the vent speed and valve angle measured by potentiometers and pitot probes. The required vent speed is determined from the output feedback controller [12][13][14]20]. Vent speed is regulated by PI control loops that regulate the valve angles.…”

Section: Control Systemmentioning

confidence: 99%

“…This has been a highly iterative procedure where CFD simulations and physical experiments have been used to arrive at the scaled model test bed illustrated in Figure 2 and described later in this paper. With the scaled system, we proved that we could achieve control of wind speed and direction at the user position via a combination of passive and active control systems [12][13][14], which results in an entirely novel actively controlled wind tunnel. Previous research on adaptive wind tunnels [15][16][17] only considered open loop wall boundary adaptation to control wind speed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wind display device for locomotion interface in a virtual environment

Kulkarni

Fisher

Pardyjak

et al. 2009

World Haptics 2009 - Third Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoper

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This paper describes development of a wind display system for the TreadPort virtual environment locomotion interface, which is cumulatively known as the TreadPort Active Wind Tunnel (TPAWT).Computational Fluid Dynamic simulations and experiments with a scaled model test-bed of the system has resulted in a combination of passive and active controls capable of controlling wind speed and angle acting on a user in the environment. Development of the full scale TPAWT system is then described, which requires consideration of system geometry, integration, packaging, wind loads, and instrumentation.

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Section: Control Systemmentioning

confidence: 99%

Section: Control Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wind display device for locomotion interface in a virtual environment

Kulkarni

Fisher

Pardyjak

et al. 2009

World Haptics 2009 - Third Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoper

View full text Add to dashboard Cite

show abstract

“…The Treadport Virtual Environment [1] already has a locomotion interface, which allows the user to walk through the virtual environment while viewing realistic rendering on a 180 o CAVE-like display provided by visual screens on the front and the sides. Current works [2][3][4] on augmenting the haptic interface to the original Treadport Virtual Environment [1], termed TreadPort Active Wind Tunnel (TPAWT) involve creating wind flow at the user. A haptic interface improves the sense of immersion for the user [5].…”

Section: Introductionmentioning

confidence: 99%

“…We incorporate the static observer in the speed controller developed in [3], combine it with the headwind angle controller from [4] and achieve simultaneous wind speed and headwind angle control at the user. From [4] and Fig.…”

Section: Introductionmentioning

confidence: 99%

Combined wind speed and angle control in a virtual environment using a static observer

Kulkarni

Minor

Pardyjak

et al. 2008

2008 IEEE/RSJ International Conference on Intelligent Robots and Systems

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Abstract-This paper develops a static observer for estimating wind speed in order to control wind speed and angle control at a user position in a submersive virtual environment. Addition of wind display evolves the Treadport Virtual environment into a highly immersive virtual environment called Treadport Active Wind Tunnel (TPAWT). Experiments on a scaled model of the TPAWT show that headwind flow stream diverges at the user. Pitot tube sensors placed at a particular region of converged flow in the scaled TPAWT provide measurements with lower noise.Open loop experiments on a scaled model of TPAWT show that there exists a relationship between speed measured at this region of converged flow and the wind speed at the user position. Using this relationship, the wind speed at the user can be estimated. We use this relation and combine previously used speed and angle controllers based upon the small gain theorem with a dynamic extension and conditional angular rate-switching control. Finally, we simultaneously control wind speed and headwind angle.

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A new concept of perceptual fidelity to augment virtual urban environments with microclimatic ambiances

Vigier

Moreau

Siret

et al. 2012

Usage, Usability, and Utility of 3D City Models – European COST Action TU0801

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Abstract. Whereas virtual reality has proven some potential for visual urban landscape assessment, we raise similar questions about multisensory evaluation. Urban perception is complex and putting aside sensory interactions biases the evaluation of future projects. We attempt more particularly to propose several solutions to integrate microclimatic ambiances in virtual environment evaluations. These propositions rely on a new concept of realism: perceptual fidelity. It consists in provoking the same perceptual effect as in reality without try to reproduce physical causes.

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Output Feedback Control of Wind Display in a Virtual Environment

Cited by 12 publications

References 18 publications

Wind display device for locomotion interface in a virtual environment

Wind display device for locomotion interface in a virtual environment

Combined wind speed and angle control in a virtual environment using a static observer

A new concept of perceptual fidelity to augment virtual urban environments with microclimatic ambiances

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