If an automatic regulating valve system step disturbance in order, change curve is adjustable parameters as shown in Figure 2-4 " quality index diagram shown in the transition process ", which is the transition process of damping oscillation. Graph abscissa ordinate t time, y parameters are adjusted for changes from the given value quantity. If before, at time t = 0 the stability of the system, and the adjusted parameter is equal to the given value, that is y = 0, t = 0 in an instant, and the step disturbance, the system parameters are adjusted according to the variation of damping oscillation start, after a long time, y gradually stabilized at C value, i.e. y (∞) = C.
The transition process control system is a measure of regulation system of the quality of the basis, the electric control valve using the following 5 parameters ( the parameters defined below) said:
The maximum deviation or overshoot A
The attenuation ratio of B/B '
The residual C
The transition time
The oscillation period or frequency
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