SecondOrderTransferFunction Class Reference

The SecondOrderTransferFunction class implements a second order transfer function using bilinear transform. More...

Public Member Functions
void	initialize (double timestep, double num[3], double den[3], double u0=0.0, double y0=0.0, double min=-1.5E+300, double max=1.5E+300, double sy0=0.0)
	Constructor.
void	initializeValues (double u0, double y0)
void	setBackupLength (size_t nStep)
void	setNum (double num[3])
void	setDen (double den[3])
void	setNumDen (double num[3], double den[3])
void	setMinMax (double min, double max)
void	backup ()
void	restoreBackup (size_t nSteps=1)
double	update (double u)
double	updateWithBackup (double u)
double	value () const
double	delayedU () const
double	delayed2U () const
double	delayedY () const
double	delayed2Y () const
bool	isSaturated () const
	Check if the transfer function is saturated (har reached the set limits)

Detailed Description

The SecondOrderTransferFunction class implements a second order transfer function using bilinear transform.

To declare a filter like

the syntax is filter.setNumDen(num, den) where , , and , , ,

Member Function Documentation

initialize()

void initialize	(	double	timestep,
		double	num[3],
		double	den[3],
		double	u0 = 0.0,
		double	y0 = 0.0,
		double	min = -1.5E+300,
		double	max = 1.5E+300,
		double	sy0 = 0.0 )

Constructor.

Parameters

timestep	Time step
num	Numerator
den	Denominator
u0	Initial input value
y0	Initial output value
min	Minimum limit of output value
max	Maximum limit of output value
sy0	Initial derivative of output value

isSaturated()

bool isSaturated

(

)

const

Check if the transfer function is saturated (har reached the set limits)

Returns

true or false

value()

double value

(

)

const

Return current filter output value

Returns

The filtered actual value.