Development of a Control Theoretic Alternative to Fitts’ Law With Application to In-Vehicle Touchscreen Interface

Volume 9: 2015 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications ◽

10.1115/detc2015-46341 ◽

2015 ◽

Cited By ~ 1

Author(s):

Chao Wang ◽

Bahram Ravani

Keyword(s):

Physical Interpretation ◽

Model Identification ◽

Human Operator ◽

Target Acquisition ◽

Relative Movement ◽

Brief Treatment ◽

Fitts Law ◽

Proposed Model ◽

Acquisition Task

A control theoretic alternative to Fitts’ Law based on a modified crossover model is proposed. A physical interpretation of the model offers the unification of various different formulations of Fitts’ Law. Model identification and validation is carried out for a target acquisition task using a touchscreen. A brief treatment of noise generated by random relative movement between the human operator and the touchscreen (such as in-vehicle touchscreen based devices) is considered using the proposed model.

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Evaluation of a modified Fitts law brain–computer interface target acquisition task in able and motor disabled individuals

Journal of Neural Engineering ◽

10.1088/1741-2560/6/5/056002 ◽

2009 ◽

Vol 6 (5) ◽

pp. 056002 ◽

Cited By ~ 38

Author(s):

E A Felton ◽

R G Radwin ◽

J A Wilson ◽

J C Williams

Keyword(s):

Brain Computer Interface ◽

Computer Interface ◽

Target Acquisition ◽

Fitts Law ◽

Acquisition Task

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Comparison of Six Cursor Control Devices Based on Fitts' Law Models

Proceedings of the Human Factors Society Annual Meeting ◽

10.1177/154193128603000403 ◽

1986 ◽

Vol 30 (4) ◽

pp. 327-331 ◽

Cited By ~ 58

Author(s):

Brian W. Epps

Keyword(s):

Regression Analysis ◽

Movement Time ◽

Performance Data ◽

Target Acquisition ◽

Acquisition Performance ◽

Cursor Control ◽

Fitts Law ◽

Acquisition Task ◽

Control Devices ◽

Best Fit

Six cursor control devices were compared on a target acquisition task which required subjects to move a cursor into square targets of varying sizes and at various screen distances. The target acquisition performance data were fitted to movement time models proposed by Fitts, Jagacinski, and Kvalseth. Regression analysis results indicated good predictions of target acquisition performance for the six cursor devices. The best fit was obtained with the trackball across the three models.

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Decision modeling for a target acquisition task

Optical Engineering ◽

10.1117/1.1286508 ◽

2000 ◽

Vol 39 (9) ◽

pp. 2581 ◽

Cited By ~ 2

Author(s):

Masha Maltz

Keyword(s):

Decision Modeling ◽

Target Acquisition ◽

Acquisition Task

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Utility of off-boresight helmet-mounted symbology during a high-angle airborne target acquisition task

10.1117/12.177376 ◽

1994 ◽

Cited By ~ 4

Author(s):

Eric E. Geiselman ◽

Robert K. Osgood

Keyword(s):

Target Acquisition ◽

High Angle ◽

Acquisition Task ◽

Airborne Target

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Experimental and Numerical Assessment of Mistuning Effects on Vibratory Response of a Bladed Disk with Underplatform Dampers

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4049772 ◽

2021 ◽

Author(s):

S. Mehrdad Pourkiaee ◽

Teresa Berruti ◽

Stefano Zucca ◽

Geoffrey Neuville

Keyword(s):

Model Identification ◽

Forced Response ◽

Response Level ◽

Static Test ◽

Bladed Disk ◽

Experimental Campaign ◽

Proposed Model ◽

Numerical Assessment ◽

Linearized Model ◽

Forced Responses

Abstract This paper presents experimental and numerical investigation of mistuned forced responses of an integrally bladed disk with full set of underplatform dampers (UPDs). This research aims at providing: 1. An experimental benchmark for nonlinear dynamics of a mistuned bladed disks with UPDs. 2. A numerical model that can account for features of a mistuned forced response level. Accordingly, a detailed experimental campaign is conducted on a static test rig called Octopus. This rig is specifically designed to investigate the dynamics of a full-scale integrally bladed disk (blisk) with UPDs in a noncontact manner so that the dynamic response of the system is not modified. The effect of mistuning on experimental forced response levels is assessed and a linearized model is proposed to predict the modulation of frequency response functions (FRFs) due to the frequency splitting. In the development of the model, the mistuning pattern identified from the linear blisk without UPDs is used and it is assumed that adding the dampers does not change the structural mistuning of the blisk. In this study, the fundamental mistuning model identification (FMM ID) was employed to identify the mistuning pattern of the blisk. It is shown that the proposed model successfully predicts the modulation of linear mistuned FRFs. The linearized model is also able to predict the modulation of nonlinear mistuned FRFs in stick condition (when nonlinear friction damping is negligible) with a good accuracy validating this assumption that adding the dampers does not change the mistuning pattern.

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Differential Effects of ‘Noise’ Stress and Workload on Salience and Hemispace Bias in a Screen-Based Target Acquisition Task

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/154193129503901302 ◽

1995 ◽

Vol 39 (13) ◽

pp. 864-867

Author(s):

Alan F. Stokes ◽

James A. Pharmer ◽

Aysenil Belger

Keyword(s):

Individual Differences ◽

Stress Condition ◽

Target Selection ◽

Attentional Biases ◽

Target Acquisition ◽

Differential Effects ◽

Noise Stress ◽

Acquisition Task ◽

High Bias ◽

Related Stress

Attentional biases in stressed or overworked radar operators (airborne or in Combat Information Centers, etc.) may have important operational implications. This study examined the effects of workload and non-workload-related stress on salience bias in a screen-based target selection and engagement task. Results in the control condition confirmed that appreciable baseline salience bias existed. Moreover, in the non-task-related stress condition (noise/anxiety), a significant increase in salience bias was observed. Elevated workload, in contrast, was associated with no significant changes in salience bias. Overall, the results showed stable individual differences in salience bias and suggested that non-workload related stress influenced ‘high bias’ individuals proportionately more than ‘low bias’ individuals-an outcome with potential implications for selection. Subjects were also significantly biased toward the left hemispace, a powerful effect that remained even after the experiment was repeated using subjects’ left instead of right hands.

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Performance Study Involving a Force-Reflecting Joystick for Spastic Individuals Performing two Types of Tracking Tasks

Perceptual and Motor Skills ◽

10.1177/003151259508100240 ◽

1995 ◽

Vol 81 (2) ◽

pp. 561-562 ◽

Cited By ~ 3

Author(s):

D. W. Repperger ◽

C. A. Phillips ◽

T. L. Chelette

Keyword(s):

Upper Extremity ◽

Continuous Time ◽

Normal Subjects ◽

Tracking Task ◽

Performance Study ◽

Fitts Law ◽

Spatial Sense ◽

Tracking Tasks ◽

Acquisition Task ◽

Force Reflection

10 upper-extremity spastic subjects and 10 normal subjects were studied with a force-reflecting joystick in the performance of a continuous time-tracking task as well as an acquisition task termed, “Fitts’ Law.” Certain force-reflection paradigms, in a spatial sense, allowed the spastic subjects to obtain performance proficiency near levels of the normal subjects as measured by a capacity metric.

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