Community Tip - Stay updated on what is happening on the PTC Community by subscribing to PTC Community Announcements. X
I am looking to make some symbolic equations then place them inside a matrix and solve current node mesh for the answer to circuit equation. I am looking for advice on how to do this or the advice that such an endeavor is impractical. My next goal is to find a PTC defined function to extract the coeffecient for the equations for Voltage and the unknown currents (I.1 I.2 I.3 I.4 I.5). So right as now i am looking to sort the result and THEN Store the results.
Is the attached the sort of thing you are looking for?
Alan
I am looking to organize the equation (E.1, E.2, E.3, E.4, E.5).. I have five unknowns (I.1, I.2, I.3, I.4, I.5) and the five equations already mentioned (E.1, E.2, E.3, E.4, E.5). I want to organize the equation in terms of some number = an equation defined but the unknowns. I.E. (19=28*I.1+70*I.2+99*I.3-7453*I.4-972364*I.5) I then want to extract the coefficients. The place the coefficient into a matrix one equations at time till i have square matrix i can solve for. (I.E. invert roe escholon etc. etc low lever linear algebra.. if the matrix is not invertible i can throw and error?) I understand what your doing buy looking at the equations and just copying the equations into a matrix then solving for it. I am petty. i might want to do a simulation of passive components then run a script and some mathcad commands to check my other math cad work. I was working for a trainer and maybe went over board looking to use symbolics.
What i want to do is to take a set of equations and assemble a matrix. I am looking take a system of equations and turn them formally into a matrix. kindle.. I know i am naive. sorry so the function is maybe (coeffs, why_because_like_you)... Where coeffs is mathcad defined symbolic function to pull out the coeffs out of symbolic equation and the variable why_because_like_you is an vector of various variable names each with degree 1 (so no ^0). I am going to try that then insert the coefficients vectors one at a time into a matrix till i hopefully get a square matrix. Thank you for being patient. i will see if i can describe or come up with the answer i was.. looking for..
I shall like to see that work, but knowing Mathcad, I have my doubts.
In the mean time, here is a more compact setup:
Attached a mathcad 11 file. Autocalculation is OFF, press F9 for results.
Success!
Luc
Delete
Some remarks:
The keyword "Given" to start a solve block must be written in a math region, not a text region
A solve block can also be evaluated symbolically.
See if the attached file helps
I can see your getting a solution. I can see you putting an initial value into the variable of the imaginary number square root of negative one i believe. I have to explain to the tutor/ friend why i am doing this in mathcad and how it gets me the answer i need. So i go back to what i know linear algebra and i try to make mathcad conform to formula i know. Your time is money.. Do you have any books to suggest that might explain this as i am probably more easily confused and have to be thorough in my explanation to my tutor? (Worse i could (Henry David) Thoreau in my work which might be too wordy and too nerdy.)
Hi,
If you want to be really good, then you have to study this, there is everything:
Leon O. Chua,
Charles A. Desoer,
Ernst S. Kuh,
Linear and nonlinear circuits
Mc Graw Hill
Electrical Engineering Series