While preparing "Workshop_1", I made a couple of mistakes.
They are as follows:
1) At about Time 47:45 (47-min, 45-sec) in the Video, I said "Spherical Angle".
That is wrong. I wanted to say "Spherical Joint".
I was discussing both "Joints" and "Angles" and so, made an error while talking.
2) At about Time 54:55, when discussing "Joints" and "Joint Stiffnesses", I said
by mistake that "Node Pairs 1 and 3" are connected to "Part-A" and "Node Pairs
2 and 4" are connected to "Part B".
There it might seem like "Node Pairs 1 & 3" of a Revolute Joint will always be
connected to "Part A" of the "Joint Stiffness Card" and "Pairs 2 & 4" of the
Revolute Joint will always be connected to "Part B" of the "Stiffness Card".
That does NOT "have to be". It can be "reversed".
What I was "trying to say" is the "one of the Node Pairs" of the Revolute Joint
will be connected to "Part A" of the Stiffness Card and the "other Node Pair"
of the Joint will be connected to "Part B".
However, there is no definite "order" in the connection.
Sarba Guha
LSTC, Troy Office, Michigan, USA
May-02, 2017