pathsim.blocks.integrator module

class pathsim.blocks.integrator.Integrator(initial_value=0.0)

Bases: Block

Integrates the input signal using a numerical integration engine.

The Integrator block is inherently MIMO capable.

Parameters:

initial_value (float, array) – initial value of integrator

set_solver(Solver, **solver_args)

set the internal numerical integrator

Parameters:

• Solver (Solver) – numerical integration solver class

• solver_args (dict) – parameters for solver initialization

update(t)

update system equation fixed point loop

Parameters:

t (float) – evaluation time

Returns:

error – deviation to previous iteration for convergence control

Return type:

float

solve(t, dt)

advance solution of implicit update equation of the solver

Parameters:

• t (float) – evaluation time

• dt (float) – integration timestep

Returns:

error – solver residual norm

Return type:

float

step(t, dt)

compute timestep update with integration engine

Parameters:

• t (float) – evaluation time

• dt (float) – integration timestep

Returns:

• success (bool) – step was successful

• error (float) – local truncation error from adaptive integrators

• scale (float) – timestep rescale from adaptive integrators