PMID: 9545675Apr 18, 1998Paper

Control of liquid cooling garments: technical control of mean skin temperature and its adjustments to exercise

Applied Human Science : Journal of Physiological Anthropology
M Hexamer, J Werner

Abstract

This paper describes an automatic control concept for liquid cooling garments. The concept consists of an own controller for mean skin temperature whose setpoint is either fixed or adjusted to the metabolic heat production by means of the heart rate signal. The controller for mean skin temperature included both a proportional and an integral signal path (PI-type), the latter being able to eliminate any load error within the control loop. This means that the actual skin temperature will always match the given setpoint irrespective of the amount and the origin of the heat gain at the body shell. Experiments were carried out to test the operation of the skin temperature controller. There the setpoint was fixed while metabolic heat production was changing. After a transient period with deviations, the load error was always eliminated by the skin temperature controller. With this result one can also imagine the controllers ability to compensate changing heat gains from the environment. Despite this behaviour, the amount of heat removal was not high enough to prevent sweating and warm discomfort during all exercise levels. Therefore we draw the conclusion that, in addition, the setpoint of the skin temperature should be adjusted to t...Continue Reading

References

Aug 1, 1988·Medicine and Science in Sports and Exercise·P WebbF Ten Hoor
Sep 1, 1987·Journal of Applied Physiology·A J YoungK B Pandolf
Dec 1, 1970·Space Life Sciences·S A Nunneley
Mar 1, 1972·Journal of Applied Physiology·P WebbS J Troutman
Feb 1, 1971·Human Factors·P Webb
Nov 1, 1966·Journal of Applied Physiology·B Saltin, L Hermansen
May 1, 1980·Journal of Biomechanical Engineering·L H Kuznetz
Jan 1, 1993·European Journal of Applied Physiology and Occupational Physiology·P Webb
Nov 1, 1995·Applied Human Science : Journal of Physiological Anthropology·M Hexamer, J Werner
Jul 1, 1996·Applied Human Science : Journal of Physiological Anthropology·M Hexamer, J Werner

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Citations

Feb 8, 2006·Annals of Biomedical Engineering·A D Flouris, S S Cheung
Feb 20, 1999·Ergonomics·X XuJ Werner
Dec 22, 1998·Biomedizinische Technik. Biomedical Engineering·J Werner

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