drake::multibody::benchmarks::pendulum Namespace Reference

Classes
class	PendulumParameters
	This class is used to store the numerical parameters defining the model of a simple pendulum with the method MakePendulumPlant(). More...

Functions
std::unique_ptr< MultibodyPlant< double > >	MakePendulumPlant (const PendulumParameters &default_parameters=PendulumParameters(), geometry::SceneGraph< double > *scene_graph=nullptr)
	This method makes a MultibodyPlant model of an idealized pendulum with a point mass at the end of a massless rigid rod. More...

Function Documentation

MakePendulumPlant()

std::unique_ptr<MultibodyPlant<double> > drake::multibody::benchmarks::pendulum::MakePendulumPlant	(	const PendulumParameters &	default_parameters = PendulumParameters(),
		geometry::SceneGraph< double > *	scene_graph = nullptr
	)

This method makes a MultibodyPlant model of an idealized pendulum with a point mass at the end of a massless rigid rod.

The pendulum oscillates in the x-z plane with its revolute axis coincident with the y-axis. Gravity points downwards in the -z axis direction.

The parameters of the plant are:

• mass: the mass of the idealized point mass.
• length: the length of the massless rod on which the mass is suspended.
• gravity: the acceleration of gravity.

The simple pendulum is a canonical dynamical system as described in Chapter 2 of Underactuated Robotics.

Parameters

[in]	default_parameters	Default parameters of the model set at construction. Refer to the documentation of PendulumParameters for further details.
	scene_graph	If a SceneGraph is provided with this argument, this factory method will register the new multibody plant to be a source for that geometry system and it will also register geometry for visualization. If this argument is omitted, no geometry will be registered.