Get Help

Turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Community
- :
- PTC Mathcad
- :
- PTC Mathcad
- :
- dae_initial_condition_error?

Options

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

10-14-2020
12:04 AM

10-14-2020
12:04 AM

It seems I am prone to running into errors. Would this be an error I am causing myself or a limitation on mathcad with Differential equations? Here's what it is showing on my version and language in case it shows up different.

Solved! Go to Solution.

1 ACCEPTED SOLUTION

Accepted Solutions

Highlighted

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

10-14-2020
12:14 AM

10-14-2020
12:14 AM

Actually you only have ONE ODE, not two!

Theoretically you could solve the second equation for T.g and replace that in the first one. So you are allowed for just one IC!

In your solve block h(t) it unknown, too, so you would have to solve for it, too or you have to eliminate it!

3 REPLIES 3

Highlighted

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

10-14-2020
12:14 AM

10-14-2020
12:14 AM

Actually you only have ONE ODE, not two!

Theoretically you could solve the second equation for T.g and replace that in the first one. So you are allowed for just one IC!

In your solve block h(t) it unknown, too, so you would have to solve for it, too or you have to eliminate it!

Highlighted
##

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

10-14-2020
01:07 PM

10-14-2020
01:07 PM

Re: dae_initial_condition_error?

I did not realize I had h1 in the solve block still. I am losing it! When solving for Tg, how were you able to display the values? Using your method, I received "The symbolic result returned too large" error?

Highlighted
##

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

10-14-2020
04:27 PM

10-14-2020
04:27 PM

Re: dae_initial_condition_error?

@ML_9447606 wrote:

Note that I did the symbolic solve AFTER variables like I or sigma were defined and that I replaced T.w(t) by the value you provided for T.w(0).