Please ignore calculation link of post #18 as those are incorrect. I tried to solve the simultaneous equations without first reducing vectors to unit vectors.
Here is the new link. https://imgur.com/a/OF35b
I have tried to solve equations by considering all suspension cables to be identical...
Guys. I was wrong about the motor safety factor. Seems stall torque is not a good measurement for safety factor as actual torque while motor is rotating is much lower.
How can I calculate torque for a 60rpm motor, 1:270 gear ratio, given 75pwm value through arduino while rotating?
Also, I am...
Hi Nidium. Thanks for simplifying what others have stated. I have made approximations in suspension cable lengths and calculated for both cases.
1. Actual (where the dimensions of cable are roughly similar to the actual dimensions)
2. Approx (where I have considered all the cables to be in...
Yes you are right that three taut strings should hold a rigid plate. So i suppose it cannot be considered a rigid plate, since the grid is made of ropes and won't act like a rigid plate unless pulled taut from all four corners. I'll have to make some more considerations.
Update : We built a scale model yesterday of 1:10 ratio to check grids behavior. It was observed that the grid will be taut enough to be considered as a uniform plate. Also, the the cables suspending the grid from the structure will be taut enough to have very little slack in them.
Any other...
Could you please point me to similar or same problems?
Three cables are going to be fixed to structure. Remaining one will be wound to motorized pulley where pulley is fixed to fourth point on structure.
Wouldn't that mean those 3 fixed point cables are always going to be under tension? Am I...
Hi. I have upgraded the diagram according to your guidance.
Link to diagram : https://imgur.com/a/LflI1
All points are measured with respect to origin at point A.(bottom left corner of grid)
Mass of grid is 25kg.
Gravity is 9.8m/s^2.
I tried to calculate Tension using matrix and solving...
What data is missing that would allow me to solve this problem?
I would still require forces acting on the strings in x-y-z direction for that, right? That is what I am trying to figure.
I think its not going to be as taut to be treated as a uniform flat plate unfortunately. This is how the original installation looked like. Though it won't be as loose as shown in image...
Homework Statement
A grid made of ropes is suspended by its four corners with strings tied to four different points on a building. Three of which are fixed and fourth is attached to a pulley which is in turn fixed to the building.
Given data :
Grid mass is 25 kilogram suspended at a height of...