SIMPLORER User Manual V6.0 - FER-a

8
266 Using Signal Characteristics
Number of Overshoot Factors for calculation NFACT real
Start Time [s] TSTART real
Stop Time [s] TSTOP real
Component Outputs
Description [Unit] Parameter Name Data Type
Current Overshoot (Actual overshoot factor) OVER real
Maximal Overshoot (in percent of final value) OVERMAX real
Time of Maximal Overshoot (Time span to reach the maximum
overshoot)
TMAX real
Integral Characteristics
>>Basics>Signal Characteristics>Dynamic Performance Parameters
The macro provides integral criteria (also often called control Areas) of a variable. By means
of such criteria the wave form of an error signal e(t) can be evaluated, caused by a setpoint
change at t = t0 . Objective of the evaluation is an optimization of a controlled system by minimizing
a criterion mentioned above.
Definition of Integral Criteria
For Control Areas without time weighting (IAE, ISE) the active values of an error signal at the
beginning of the considered time interval have a big influence, otherwise later occurring deviations
play only a minor role. For Control Areas with time weighting (ITAE, ITSE) the influence
of the first part of signal is reduced significantly and later existing deviations are more
taken into account. Using the time weighting criteria for controller optimization so produces
better damped transient responses. The integral criteria are applicable for setpoint changes
and also for changes in the disturbance signal.
∫
∫
IAE = e() t dt
ISE e 2 = () t dt
ITAE = te() t dt
ITSE t e 2 = ⋅ () t dt
INPUT =
e
∫
∫
Dialog Settings
«Input Signal»
Enter a quantity name used in your model sheet in the text box to define the input signal
(RLOAD.I, STEP.VAL, STATE.ST, VAR) or use the pin to connect a quantity. Please note: You
cannot use conservative nodes from circuits as input signal (N0002, GND).
� � «Use Pin»
If the box is checked, the input signal is defined by the quantity connected to the pin, otherwise
the value in the text box is used.
«Setpoint Value»
Defines the setpoint of the input signal. Common parameter type. Enter a numerical value, a
variable, or an expression in the text box.