An evaluation of three types of hand controllers under random vertical vibration

Allen, Robert B.; Goddard, Connie; Weisz, A. Z.

doi:10.1037/e506122009-021

Cited by 3 publications

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“…Some investigations have been made of the explicit influence of some of the environmental variables on manual control. [22][23][24] Evaluating the effects of variations in the task variables as indicated in Fig. 3, however, makes up the large majority of the research into manual control during tracking.…”

Section: Iic Variables That Affect Manual Control Behaviormentioning

confidence: 99%

Effects of Displayed Error Scaling in Compensatory Roll-Axis Tracking Tasks

Breur

Pool

Paassen

2010

AIAA Modeling and Simulation Technologies Conference

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This paper describes an investigation into the effects of displayed error scaling on manual control behavior during compensatory roll-axis tracking. Previous experiments have indicated that for compensatory displays that, similar to an artificial horizon, present the roll tracking errors in rotational form, the deviations for typical quasi-random forcing function signals are comparatively small and difficult to perceive. This was found to lead to degraded tracking performance and lower crossover frequencies than would be expected. To investigate this, a roll-axis tracking experiment has been performed in which the scaling of the presented tracking errors was varied from 0.5 to 5 times the true tracking error. In addition, both double integrator dynamics and typical conventional roll dynamics of a small jet aircraft were considered in a mixed experimental design. The main hypothesis for this experiment was that increased scaling of the presented roll-axis tracking error would result in improved tracking performance and correlation of manual control inputs with the target forcing function signal. In addition, these effects were hypothesized to be more pronounced for the more difficult double integrator dynamics. For both controlled elements, both tracking performance and linearity of pilot control were indeed found to increase with increasing display gain, leveling of for the highest considered display gains. Further analysis of manual control behavior using McRuer et al.'s Precision Model revealed marked changes in the adopted control strategy due to changes in displayed error scaling, which were found to be highly similar for both controlled elements.

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Section: Iic Variables That Affect Manual Control Behaviormentioning

confidence: 99%

Effects of Displayed Error Scaling in Compensatory Roll-Axis Tracking Tasks

Breur

Pool

Paassen

2010

AIAA Modeling and Simulation Technologies Conference

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Direction guidance of road vehicles. Are better controls in sight?

Tejmr¹

1972

Applied Ergonomics

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Decrements in Tracking and Visual Performance during Vibration

Collins

1973

Hum Factors

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This literature review specifies the decrements in human performance on tracking and visual acuity tusks during vibration in terms of frequency, acceleration, and direction of vibration. For z-axis (vertical) vibration, which has been studied most extensively, it has been possible to develop tentative equal-decrement curves in terms of frequency and acceleration. For x-axis (longitudinal) and y-axis (lateral) vibration, there are not enough data to do SO. The effects of other variables are discussed briefly, and an hypothesis is offered for translating experimental results into predictions of performance decrements for workers in vibration environments. INTRODUCTIONWhen people are subjected to vibration, their ability to perform tasks is often substantially impaired. In addition to causing discomfort (and sometimes sickness), vibration interferes with the ability to see clearly, as when reading instruments or written materials, and the ability to control one's bodily movements precisely, as when steering or writing. Such degradation of human performance leads to inefficient and even hazardous operation of air, sea, and land vehicles in which vibration inevitably occurs.The principal aim of this literature review is to determine how direction, frequency, and acceleration (or amplitude) of vibration affects tracking and visual performance. Ideally, a vehicle designer would like to determine, in advance, how large the decrement in performance on various tasks will be for a person operating a vehicle with certain frequency and acceleration characteristics. In this review the intention is to extract, from the literature, estimates of performance decrements in representative tasks across a broad range of frequencies and accelerations. With this kind of information, the design of new vehicles and improvement of existing vehicles can be directed toward minimizing the types of motion most detrimental to task performance.This review is divided into three major sections: (1) the effects of vibration on tracking tasks; (2) the vibration effects on visual acuity (Data from various sources are plotted on acceleration vs. frequency graphs and lines of equal decrement in performance are drawn where possible); and (3) recommendations for future experimental research.The measure of vibration most commonly used in the literature is the zero-to-peak value of sinusoid acceleration. However, the rootmean-square value is typically used as a measure of random vibration. To make graphs easily comparable, rms accelerations have been converted to "equivalent" zero-to-peak values by multiplying all rms levels by fi Grether (1971) has written a comprehensive review of the literature on vibration and human performance. This paper ~ extends Grether ' s conclusions in several significant ways. First, the figures in this paper make it possible to compare percentage decrements across various studies in the tracking and visual performance literature. Second, the important problem of translating results from sinusoidal vibration studies into predic...

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An evaluation of three types of hand controllers under random vertical vibration

Cited by 3 publications

References 0 publications

Effects of Displayed Error Scaling in Compensatory Roll-Axis Tracking Tasks

Effects of Displayed Error Scaling in Compensatory Roll-Axis Tracking Tasks

Direction guidance of road vehicles. Are better controls in sight?

Decrements in Tracking and Visual Performance during Vibration

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