scipy.signal.lti¶
-
class
scipy.signal.
lti
(*system)[source]¶ Linear Time Invariant system base class.
Parameters: *system : arguments
The
lti
class can be instantiated with either 2, 3 or 4 arguments. The following gives the number of arguments and the corresponding subclass that is created:- 2:
TransferFunction
: (numerator, denominator) - 3:
ZerosPolesGain
: (zeros, poles, gain) - 4:
StateSpace
: (A, B, C, D)
Each argument can be an array or a sequence.
Notes
lti
instances do not exist directly. Instead,lti
creates an instance of one of its subclasses:StateSpace
,TransferFunction
orZerosPolesGain
.Changing the value of properties that are not directly part of the current system representation (such as the
zeros
of aStateSpace
system) is very inefficient and may lead to numerical inaccuracies.Attributes
A
State matrix of the StateSpace
system.B
Input matrix of the StateSpace
system.C
Output matrix of the StateSpace
system.D
Feedthrough matrix of the StateSpace
system.den
Denominator of the TransferFunction
system.gain
Gain of the ZerosPolesGain
system.num
Numerator of the TransferFunction
system.poles
Poles of the ZerosPolesGain
system.zeros
Zeros of the ZerosPolesGain
system.Methods
bode
([w, n])Calculate Bode magnitude and phase data of a continuous-time system. freqresp
([w, n])Calculate the frequency response of a continuous-time system. impulse
([X0, T, N])Return the impulse response of a continuous-time system. output
(U, T[, X0])Return the response of a continuous-time system to input U. step
([X0, T, N])Return the step response of a continuous-time system. - 2: