Direct Kinematics:
The objective of the direct kinematics is to determine
the accumulative effect that comes from the set of variables of
each link, that is, to determine the position and orientation of
the end-effector.
The analysis of the Direct Kinematics was made using the
Denavit Hartembrerg convention as follows:
A
i
= (1)
Then, the table 2 was obtained with the results:
Table 2. Denavit Hartenberg parameters
After some calculations, the end-effector position vector is
defined by:
X=
Y=
Z=
Inverse Kinematics:
The inverse kinematics main problem can be reduced
to both the calculus of the position and orientation inverse
kinematics, where a geometrical approach to the problem
solution is based in the Method proposed by Spong [8].
Differential Kinematics:
In the previous steps, the dynamics related with the position
of the end-effector as well as the location of the joints and its
position with respect to the reference frame, therefore, the
position problem will be changed to a speed analysis problem
of a serial manipulator.
The differential kinematics is defined by the next
equation:
(2)
where J is the Jacobian matrix. This matrix depends on the
robot configuration and robot degrees of freedom (DOF).
Dynamics:
The dynamic equation of an n-DOF in the manipulator can
be defined as:
,
(3)
To carry out the manipulator analysis in this research,
we consider the Lagrangian analysis [9], this method consist
in the generalized coordinate analysis and it is based on the
Lagrangian function, which is defined by the difference
between the kinetic and the potential energies on a
mechatronic system and is defined as:
Do'stlaringiz bilan baham: |