Recent content by Barkan

if it is a set of differential equations, you may use runge kutta if not, you can find the roots by Newton raphson method refer to numerical recipes in C (they have numerical recipes in MATLAB too) textbook

it's been 3 years since this is asked. but, in any case, i just try to answer this question. (Correct me if I'm wrong) (also, considering the fact that above given link is dead) suppose we have 2dof mass spring system GND -- Spring 1 (k1) -- Mass 1 (m1) -- Spring 2 (k2) -- Mass 2 (m2) there...

spring coeff: k damper coeff: c total impedance is k + sc in laplace domain

Correct me if I'm wrong. Here are the motion equations; mx'' + c1x' + k1x' = 0 (Not forced) my'' + c2y' + k2y' = 0 (Not forced) Suppose the frame is rotated thru angle q, In this case, the mass center position with respect to the frame F is Xnew = x*cos(q) - y*sin(q) Ynew =...

yes tiny, symbols are referring the way you define. some people were criticizing me for using this term. the problem is how i am supposed to name I*W then? It is not 'angular momentum' because the term angular momentum includes other terms as written above. roy featherstone refers it as...

Hi All, According to some textbook, angular momentum can be represented as follows; L = rxP + I*W r is position from the origin, P is translational momentum, I is inertia tensor and W is angular velocity. Is it possible to call I*W part as intrinsic angular momentum? Thanks

I try to clearify it as much as I can, and I greatly appreciate the given answers. Suppose that we have a rigid body. We attach a movable coodinate frame on this body. Normally, if I perform 3 successive rotations such as Z-Y-X or Z-Y-Z (or any other 24) I can describe its rotation in...

by the way it is suprising that nobody above heard of Fresnels.

There is no systematic way to compute Fresnel integrals as I know. But there are several approximation methods I found Peter L. Volegov's code in Matlab central. It uses a method proposed in the following : (ith an error of less then 1x10-9) Klaus D. Mielenz, Computation of Fresnel...

Actually, I still don't know which definition does Matlab use. But -as you said- it should be asy to understand by trying some numeric values. I guess. As I solved my own problem, I should answer my own questions. i)What happens if I want to compute some function's fresnel integral...

Hello everyone, I am currently dealing with some coupled differential equations. Seems like the result include Fresnel integrals which are easy to be approximated. However, I am confused in many ways and I hope some experienced people can answer following: 1) Normally, we can obtain...

it is a fresnel intetgral

Just for the record, Sym. Math Toolbox is not aware of cosh/sinh functions when simplifying equations. It can't see them.

Oh my bad. Thank you very much. I just thought it's a custom MATLAB function. Thank you Integral. :)

Hi all, This question may be silly but I've come across with erf function while performing a symbolic integration of a complicated math expression. i guess it refers an error function that can be cumulated during the integration process but does it mean that I can ignore the terms affiliated...