Page 23 - 6742
P. 23
mass moment of inertia; S і – is velocity of і-th link’s center of
mass; – is і-th link’s angular velocity; m – is і-th link’s mass.
і
і
Magnitude of J will be constant, because i const .
1
0
Magnitude of J is given in the input data to this calculation
0
work. Flywheel’s mass moment of inertia is unknown at this stage
of research. Therefore, we can determine incomplete mechanism’s
equivalent mass moment of inertia J зв considering that J м 0
k 2 k 2
зв J 0 m S і J S i .
J
i
i
n
i 1 i 1 1
1
Only mass of an output link m is taken into account in this
5
calculation work. Masses of another links are not considered.
2
J зв n J 0 m 5 D n .
1
For example, for control position ( n 8)
8 2 0, 912 2
2
J зв J m D 31 24 31, 308kg∙m .
5
0
8
1
7
Fig. 1.6 – Diagram of equivalent mass moment of inertia
For determination J зв n for all another positions, next
formula should be added to the MathCAD program
22