FRID – Frequency response identification

Block SymbolLicensing group: ADVANCED

Function Description
The function block description is not yet available. Below you can find partial description of the inputs, outputs and parameters of the block. Complete documentation will be available in future revisions.

Inputs

dv	Feedforward control variable	Double (F64)
pv	Process variable	Double (F64)
ID	Start the tuning experiment	Bool
HLD	Hold	Bool
BRK	Stop the tuning experiment	Bool

Parameters

ubias	Static component of the exciting signal	Double (F64)
uamp	Amplitude of the exciting signal $⊙$ 1.0	Double (F64)
wb	Frequency interval lower limit [rad/s] $⊙$ 1.0	Double (F64)
wf	Frequency interval higher limit [rad/s] $⊙$ 10.0	Double (F64)
isweep	Frequency sweeping mode $⊙$ 1	Long (I32)
	1 .... Logarithmic 2 .... Linear
cp	Sweeping Rate $⊙$ 0.995	Double (F64)
iavg	Number of values for averaging $⊙$ 10	Long (I32)
obw	Observer bandwith $⊙$ 2	Long (I32)
	1 .... LOW 2 .... NORMAL 3 .... HIGH
stime	Settling period [s] $⊙$ 10.0	Double (F64)
umax	Maximum generator amplitude $⊙$ 1.0	Double (F64)
thdmin	Minimum demanded THD treshold $⊙$ 0.1	Double (F64)
adapt_rc	Maximum rate of amplitude variation $⊙$ 0.001	Double (F64)
pv_max	Maximum desired process value $⊙$ 1.0	Double (F64)
pv_sat	Maximum allowed process value $⊙$ 2.0	Double (F64)
ADAPT_EN	Enable automatic amplitude adaptation $⊙$ on	Bool
immode	Mesurement mode $⊙$ 1	Long (I32)
	1 .... Manual specification of frequency points 2 .... Linear series of nmw points in the interval <wb;wf> 3 .... Logarithmic series of nmw points in the interval <wb;wf> 4 .... Automatic detection of important frequencies (N/A)
nwm	Number of frequency response point for automatic mode	Long (I32)
wm	Frequency measurement points for manual meas. mode [array of rad/s] $⊙$ [2.0 4.0 6.0 8.0]	Double (F64)

Outputs

mv	Manipulated variable (controller output)	Double (F64)
SAT	Saturation flag	Bool
IDBSY	Tuner busy flag	Bool
w	Actual frequency [rad/s]	Double (F64)
xres	real part of frequency response (sweeping)	Double (F64)
xims	imaginary part of frequency response (sweeping)	Double (F64)
xrem	real part of frequency response (measurement)	Double (F64)
ximm	imaginary part of frequency response (measurement)	Double (F64)
epv	Estimated process value	Double (F64)
IDE	Error indicator	Bool
iIDE	Error code	Long (I32)
A0	Estimated DC value	Double (F64)
A1	Estimated 1st harmonics amlitude	Double (F64)
A2	Estimated 2nd harmonics amlitude	Double (F64)
A3	Estimated 3rd harmonics amlitude	Double (F64)
A4	Estimated 4th harmonics amlitude	Double (F64)
A5	Estimated 5th harmonics amlitude	Double (F64)
THD	Total harmonic distorsion	Double (F64)
DAV	Data Valid	Bool

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