Abstract
In many conventional man-machine studies, the human control responses are analyzed in terms of the linear component and remnant. In this paper remnant is analyzed into two components: the system and the noise components. The noise component is assumed to be due to the psychophysical noise of the operator, while the system component is responsible to the way of closed-loop interactions between man and machine.
In the experiments, the existence of the system component is shown by a comparison of the control responses under open and closed loop situations.
Next, it is shown that amplitude and period of the system component exhibit certain variations according to the difference in the plant dynamics. This confirms that mutual interactions between man and machine are essential in formation of the system component. The last experiment shows that the system component increases after sudden change in the input amplitude, period and waveform.
This increase indicates a useful role of the system component in maintaining control accuracy, when sufficient input model is not available due to the sudden change in input.
