ODE-Solvers

Solving of ODE-Systems in the form

\[\begin{split}\frac{\mathrm{d} \mathbf{x}}{\mathrm{d} t}&= f(\mathbf{x}, \mathbf{u}, t)\\\end{split}\]

Available ODE-Solvers:

• Euler Solver
• scipy.integrate.solve_ivp Solver
• scipy.integrate.ode Solver
• scipy.integrate.odeint Solver

ODE-Solver Base Class

class gym_electric_motor.physical_systems.solvers.OdeSolver

Interface and base class for all used OdeSolvers in gym-electric-motor.

integrate(t)

Integrate the ODE-System from current time until time t

Parameters:

t (float) – Time until the system shall be integrated

Returns:

New system state at time t

Return type:

ndarray(float)

set_f_params(*args)

Set further arguments for the systems function call like input quantities.

Parameters:

args (list) – Additional arguments for the next function calls.

set_initial_value(initial_value, t=0)

Set the new initial system state after reset.

Parameters:

• initial_value (numpy.ndarray(float)) – Initial system state

• t (float) – Initial system time

set_system_equation(system_equation, jac=None)

Setting of the systems equation.

Parameters:

• system_equation (function_pointer) – Pointer to the systems equation with the parameters (t, y, *args)

• jac (function_pointer) – Pointer to the systems jacobian with the parameters (t, y, *args)

property t

Returns: float: Current system time t

property y

Returns: float: Current system state y