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Article
Publication date: 1 March 1991

Abdul Raouf, Hirofumi Imanishi and Kozi Morooka

Various aspects of operator performance during cranking are affected by the variability in crank size, resistance, location and position. Adequate prediction models…

Abstract

Various aspects of operator performance during cranking are affected by the variability in crank size, resistance, location and position. Adequate prediction models incorporating these factors are not available to the designers of man‐machine systems. Consequently a set of experiments was conducted using three levels of crank radius, three levels of torque, three levels of plane angle, three levels of crank height, and two turning directions (namely, clockwise and anti‐clockwise) for continuous as well as intermittent cranking. The effect of radius, torque, plane angle and crank height were found to be significant and a subject's anthropometric dimensions and hand‐arm strength influenced cranking performance significantly. Prediction models for the turning rate for continuous and intermittent cranking were developed.

Details

Kybernetes, vol. 20 no. 3
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 1 February 1989

Abdul Raouf, Iji Ogawa and Kozi Morooka

Industrial control tasks can also be called Combined Manual and Decision Tasks (CMDT). It is in the performance of such tasks that the human operator is likely to play an…

Abstract

Industrial control tasks can also be called Combined Manual and Decision Tasks (CMDT). It is in the performance of such tasks that the human operator is likely to play an essential role as a decision maker. The findings presented are based on experimental studies in which 20 male subjects performed partial factorial experiments. Models of human performance in a two‐stage CMDT are developed and optimal conditions determined.

Details

Kybernetes, vol. 18 no. 2
Type: Research Article
ISSN: 0368-492X

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