Exponentially Segmented Positioning of a Single Link Mechanism: A Control Algorithm that Satisfies Fitts' Law

Duration of accuracy-constrained human movement is described by a logarithmic function known as Fitts' law, which characterizes a tradeoff between speed and accuracy in point-to-point motion. A control method is presented that produces a response conforming to Fitts' equation. The describe...

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Bibliographic Details
Main Authors: Shelton, J.N., Chiu, G.T.-C., Pizlo, Z.
Format: Conference Proceeding
Language:English
Subjects:
Cities and towns
Costs
Delay effects
Equations
Humans
Mechanical engineering
Needles
Psychology
Size control
Spatial resolution
Online Access:Request full text
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Description
Summary:Duration of accuracy-constrained human movement is described by a logarithmic function known as Fitts' law, which characterizes a tradeoff between speed and accuracy in point-to-point motion. A control method is presented that produces a response conforming to Fitts' equation. The described control divides desired movement into regions of exponentially decreasing size, and is therefore known as exponential segmentation. By restricting overshoot, this approach produces a series of exponentially smaller submovements of nearly equal duration. This causes the response to agree with Fitts' law, while displaying multiresolutional characteristics. Thus, the proposed algorithm is a potential candidate for describing human psychomotor control of point-to-point movement.
ISSN:0743-1619
2378-5861
DOI:10.1109/ACC.2007.4283090