andes.core.block.LeadLag2ndOrd#

class andes.core.block.LeadLag2ndOrd(u, T1, T2, T3, T4, zero_out=False, name=None, tex_name=None, info=None)[source]#

Second-order lead-lag transfer function block.

     ┌──────────────────┐
     │ 1 + sT3 + s^2 T4 │
u -> │ ──────────────── │ -> y
     │ 1 + sT1 + s^2 T2 │
     └──────────────────┘

Exports two internal states (x1 and x2) and output algebraic variable y.

Parameters:

uBaseVar or BaseParam: Input signal.
T1BaseParam: Denominator first-order time constant.
T2BaseParam: Denominator second-order time constant. Also used as the t_const of the internal state x1.
T3BaseParam: Numerator first-order time constant.
T4BaseParam: Numerator second-order time constant.
zero_outbool, optional: If True, bypass the block as y = u when T2 <= 0. Default is False.

__init__(u, T1, T2, T3, T4, zero_out=False, name=None, tex_name=None, info=None)[source]#

Methods

`define`()	Notes
`enforce_tex_name`(fields)	Enforce tex_name is not None
`export`()	Method for exporting instances defined in this class in a dictionary.
`f_numeric`(**kwargs)	Function call to update differential equation values.
`g_numeric`(**kwargs)	Function call to update algebraic equation values.
`j_numeric`(**kwargs)	Per-iteration numerical Jacobian update.
`j_reset`()	Helper function to clear the lists holding the numerical Jacobians.
`j_setup`()	One-time Jacobian sparsity pattern and constant value setup.

Attributes

class_name

Return the class name.