Patent ID: 8295954

Claim:
A method for adjusting a first functional unit and a second functional unit of a regulating device, wherein the first functional unit embodies a filter ( 2 ) and the second functional unit comprises a proportional branch ( 1 ), an integral branch ( 3 ), a controlled industrial system ( 4 ) and interference variables ( 6 ), the method comprising steps of: determining a characteristic number, which quantifies a relative deviation of respective reactions y Mod and y Sys of the two functional units to a reference variable change that occurs when both functional units are excited by the same reference variable change; and determining a correction factor based on the characteristic number and using the correction factor to adjust at least one of the two functional units in order to reduce the relative deviation; wherein the characteristic number is determined in accordance with one of the following rules: characteristic ⁢ ⁢ number = ∫ T 0 T 0 + x · T f ⁢  y . Mod  · ( y Mod - y Sys ) · ⅆ t ∫ T 0 T 0 + x · T f ⁢  y . Sys · Δ ⁢ ⁢ y Sys  · sgn ⁡ ( Δ ⁢ ⁢ y Sys ) · ⅆ t ⁢ ⁢ or characteristic ⁢ ⁢ number = ∫ T 0 T 0 + x · T f ⁢ y . Mod · ( y Mod - y Sys ) · ⅆ t ∫ T 0 T 0 + x · T f ⁢ y . Sys · Δ ⁢ ⁢ y Sys · ⅆ t ⁢ ⁢ or characteristic ⁢ ⁢ number = ∫ 0 x · T f ⁢  y . Mod  · ( y Mod - y Sys ) · ⅆ t ∫ 0 x · T f ⁢  y . Sys · y Sys  · sgn ⁡ ( y Sys ) · ⅆ t , where y Mod and y Sys represent the transient responses of the two functional units to a reference variable change, taken into account over time, the symbol {dot over (y)} is the time derivative of y, T f corresponds to an eigenvalue of the low-pass filter ( 2 ) that influences a transient response of at least one of the two functional units, x stands for a multiple of the eigenvalue and the equation Δy Sys =y Sys −y Sys (t= 0 ) applies, where T 0 corresponds to a freely selectable starting time.