adam.parametric.casadi package#

Submodules#

adam.parametric.casadi.computations_parametric module#

class adam.parametric.casadi.computations_parametric.KinDynComputationsParametric(urdfstring: str, joints_name_list: list, links_name_list: list, root_link: str = None, gravity: array = array([0., 0., -9.80665, 0., 0., 0.]), f_opts: dict = {'jit': False, 'jit_options': {'flags': '-Ofast'}})[source]#

Bases: object

This is a small class that retrieves robot quantities represented in a symbolic fashion using CasADi for Floating Base systems. This is parametric w.r.t the link length and densities.

set_frame_velocity_representation(representation: Representations) None[source]#

Sets the representation of the velocity of the frames

Parameters:

representation (Representations) – The representation of the velocity

mass_matrix_fun() Function[source]#

Returns the Mass Matrix functions computed the CRBA

Returns:

Mass Matrix

Return type:

M (casADi function)

centroidal_momentum_matrix_fun() Function[source]#

Returns the Centroidal Momentum Matrix functions computed the CRBA

Returns:

Centroidal Momentum matrix

Return type:

Jcc (casADi function)

forward_kinematics_fun(frame: str) Function[source]#

Computes the forward kinematics relative to the specified frame

Parameters:

frame (str) – The frame to which the fk will be computed

Returns:

The fk represented as Homogenous transformation matrix

Return type:

T_fk (casADi function)

jacobian_fun(frame: str) Function[source]#

Returns the Jacobian relative to the specified frame

Parameters:

frame (str) – The frame to which the jacobian will be computed

Returns:

The Jacobian relative to the frame

Return type:

J_tot (casADi function)

relative_jacobian_fun(frame: str) Function[source]#

Returns the Jacobian between the root link and a specified frame frames

Parameters:

frame (str) – The tip of the chain

Returns:

The Jacobian between the root and the frame

Return type:

J (casADi function)

jacobian_dot_fun(frame: str) Function[source]#

Returns the Jacobian derivative relative to the specified frame

Parameters:

frame (str) – The frame to which the jacobian will be computed

Returns:

The Jacobian derivative relative to the frame

Return type:

J_dot (casADi function)

CoM_position_fun() Function[source]#

Returns the CoM position

Returns:

The CoM position

Return type:

com (casADi function)

bias_force_fun() Function[source]#

Returns the bias force of the floating-base dynamics equation, using a reduced RNEA (no acceleration and external forces)

Returns:

the bias force

Return type:

h (casADi function)

coriolis_term_fun() Function[source]#

Returns the coriolis term of the floating-base dynamics equation, using a reduced RNEA (no acceleration and external forces)

Returns:

the Coriolis term

Return type:

C (casADi function)

gravity_term_fun() Function[source]#

Returns the gravity term of the floating-base dynamics equation, using a reduced RNEA (no acceleration and external forces)

Returns:

the gravity term

Return type:

G (casADi function)

get_total_mass() Function[source]#

Returns the total mass of the robot

Returns:

The total mass

Return type:

mass

get_original_densities() list[float][source]#

Returns the original densities of the parametric links

Returns:

The original densities of the parametric links

Return type:

densities