Is there any VI to perform a numerical solve a function numerically with variables on integration limit and integrand

[pat_pat_tong]

I would like to ask whether there are some VIs that I can use to solve an integral numerically with the same unknown variable on the integration limit and integration. For instance, I have an integral integrated respective to x, which equals to a constant. Also, I have a variable y appeared inside the integrand and also on the integration limit, and my goal is to numerical search the values of y that fits with the integral. I know that there is a VI that can find zeroes in the function, but I don't know whether I can input an integral to that VI. Please let me know the possible solutions if you have any ideain your mind. Thanks!

[Mellobuck]

Pat,

I am having a hard time following your equation. Could you post an image of it, or (possibly) cut and paste it out of MS equation writer?

[pat_pat_tong]

To be more clear, I have written one of the similar equations in the attachment. What I want to do is to solve gamma_k, those listed in the limits of the integral, in the equation (given gamma_bar is known). Any help is appreciated. Thanks!

[Mellobuck]

Hey Pat,

I think I found the explicit solution to the equation (I edited your word doc to show it), but check my math. M is a constant right? The only unknown in the equation is now Gamma_k.

I guess the next step is to find the actual LabVIEW code  to solve for this for different values of gamma_kBAR and M? In other words, input gamma_KBAR and M and output Gamma_k?

[pat_pat_tong]

Yeah.. I agree. Acutally I want to ask whether there will be another method such that I can find gamma_k without expanding the function. I know it can be done in MATLAB by using some numerical integartion and fzero functions. Please let me know if you have any idea about that. Thanks!

[pat_pat_tong]

Yeah.. I agree. Acutally I want to ask whether there will be another method such that I can find gamma_k without expanding the function. I know it can be done in MATLAB by using some numerical integartion and fzero functions. Please let me know if you have any idea about that. Thanks!

[bburress]

Hey pat_pat_tong,
    There are a couple of VIs available in LabVIEW that will perform an integration for you.  Also, the summation can easily be done with a for loop.  If you go to www.ni.com and perform a search for integral, there are plenty of links describing how to use these VIs.  Also, there have been multiple discussion forum posts on solving equations involving integrals.  I know it's easier said than done, but the integration VIs should help you solve this equation pretty easily.