Recent content by TheJCBand

Can anyone elaborate on this? I'd like an explanation in layman's terms.

So a friend of mine posted this picture on my facebook wall. I assume there is some kind of inside joke involved that I'm not on the inside of. Anyways, I can't see any reason why this setup is impossible.

I'm beginning to study control theory, and I keep reading about matched and unmatched uncertainties in the literature, but I have yet to find the definitions of matched and unmatched. Could someone explain it to me? Thanks.

Hi, I posted this on the homework forum, but I haven't gotten any responses there. I thought there might be a better chance here. 1. Homework Statement I have the ODE h'' + h'/r + λ2h = 1, where h = h(r), and I want to find h(r). 2. Homework Equations The corresponding...

Start by defining a coordinate for each degree of freedom. Then draw the free body diagram for each of the masses. Then, write Newton's second law for each of those masses. That should get you started.

Principle stresses can be found easily using Mohr's circle. You can read about it in a mechanics of materials textbook. Basically, Mohr's circle is a plot of all the shear and normal stresses in all planes of an element, and the angle on the circle is related to the angle of the plane.

Being on the same link means that the distances between these points is fixed. This gives you two more independent equations: (x1 - x2)2 + (y1 - y2)2 = (some constant), (x1 - x3)2 + (y1 - y3)2 = (some other constant).

I figured out the problem. My function R used indexes of the vector u, and the first index is 0 in MathCAD, and I using 1, so there was a u3 in the function, which didn't exist.

Yeah, it looks like you're missing at least one piece of information about Z3.

Homework Statement I have the ODE h'' + h'/r + λ2h = 1, where h = h(r), and I want to find h(r). Homework Equations The corresponding homogeneous equation is a Bessel equation that has the solution hh = c1J0(λr) + c2Y0(λr), where J0 and Y0 are Bessel functions. Now I was planning on using...

I'm not sure if this is the right place for this question, but I didn't see a forum specifically about software. I'm trying to define a function in MathCAD that describes the rotation of a body vector about an axis u by an angle ɸ. What I've typed in is: R(ɸ,u):= [ 3x3 matrix where each...