Class CylindricalJointR

Defined in Program listing for file mechanics/src/joints/CylindricalJointR.hpp

class CylindricalJointR : public NewtonEulerJointR

This class implements a cylindrical joint between one or two Newton/Euler Dynamical system.

It is similar to a PrismaticJointR but allows for rotation around the axis.

From a given axis, we construct two unit othorgonal vectors to the axis V1 and V2 such that (axis,V1,V2) is an orthogonal frame

Public Functions

CylindricalJointR()

Empty constructor.

The relation may be initialized later by setPoint, setAbsolute, and setBasePositions.

CylindricalJointR(SP::SiconosVector P, SP::SiconosVector A, bool absoluteRef, SP::NewtonEulerDS d1 = SP::NewtonEulerDS(), SP::NewtonEulerDS d2 = SP::NewtonEulerDS())

Constructor based on one or two dynamical systems, a point and an axis.

Parameters

  • d1 – first DynamicalSystem linked by the joint.

  • d2 – second DynamicalSystem linked by the joint, or NULL for absolute frame.

  • P – SiconosVector of size 3 that defines the point around which rotation is allowed.

  • A – SiconosVector of size 3 that defines the cylindrical axis.

  • absoluteRef – if true, P and A are in the absolute frame, otherwise P and A are in d1 frame.

virtual void setBasePositions(SP::SiconosVector q1, SP::SiconosVector q2 = SP::SiconosVector())

Initialize the joint constants based on the provided base positions.

Parameters

  • q1 – A SiconosVector of size 7 indicating translation and orientation in inertial coordinates.

  • q2 – An optional SiconosVector of size 7 indicating translation and orientation; if null, the inertial frame will be considered as the second base.

inline virtual ~CylindricalJointR()

destructor

virtual void computeh(double time, const BlockVector &q0, SiconosVector &y)

to compute the output y = h(t,q,z) of the Relation

Parameters

  • time – current time value

  • q – coordinates of the dynamical systems involved in the relation

  • y – the resulting vector

virtual void computehDoF(double time, const BlockVector &q0, SiconosVector &y, unsigned int axis)

Compute the vector of linear and angular positions of the free axes.

virtual void computeJachqDoF(double time, Interaction &inter, SP::BlockVector q0, SimpleMatrix &jachq, unsigned int axis)

Compute the jacobian of linear and angular DoF with respect to some q.

inline virtual unsigned int numberOfConstraints()

Get the number of constraints defined in the joint.

Returns

the number of constraints

inline virtual unsigned int numberOfDoF()

Return the number of degrees of freedom of this joint.

Returns

the number of degrees of freedom (DoF)

inline virtual DoF_Type typeOfDoF(unsigned int axis)

Return the type of a degree of freedom of this joint.

Returns

the type of the degree of freedom (DoF)