Human Control Strategy: Definition

We define human control strategy as a reaction skill, which, in terms of complexity, lies somewhere between low-level feedback control and high-level reasoning. A particular control strategy is not only defined by the "gains" or parameters in the controller, but also the structure or approach of the strategy. Consider the skill of driving a car, for example. The diagrams below illustrate applied force profiles over the same road for two different individuals in a driving simulator. The distinction between the two driving styles is a difference in kind rather than merely a difference in degree, similar to the structural difference between a linear feedback and a variable structure controller. Each represents a unique control strategy.

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Last updated January 15, 1995 by Michael C. Nechyba