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01-18-2016
12:52 PM

01-18-2016
12:52 PM

help with space shuttle dynamics, differential equation

i need help with differential equation. so far i have something like this(mathcad file) a have to do something like this(screenshoot). i wolud appreciate any help.

10 REPLIES 10

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01-18-2016
03:26 PM

01-18-2016
03:26 PM

Re: help with space shuttle dynamics, differential equation

From your info I cannot determine which differential equation you want/need to solve. Your Prime sheet contains errors: it fails to define v(t).

You need to describe your problem accurately and concisely.

For more info on space travel modelling have a look here: Two stage rocket.

Success!

Luc

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01-20-2016
07:53 AM

01-20-2016
07:53 AM

Re: help with space shuttle dynamics, differential equation

Yes I know becouse almost at the and i need to define v(t) as a diff h(t) and i dont know how to do it. and also my problem is that i can't (dont know how) write differential equation in mathcad. Everything that is in screenshoot or maple sheet I need to do in mathcad . If you know how to solve my problem it would be very helpfull.

Best regards,

AM

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01-20-2016
09:09 AM

01-20-2016
09:09 AM

Re: help with space shuttle dynamics, differential equation

Example:

Like Mathcad 11:

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01-20-2016
09:40 AM

01-20-2016
09:40 AM

Re: help with space shuttle dynamics, differential equation

ok thank You very much. so i did this(im attaching mathcad file)

and what if I want to do this (at the top is my equasion eq.) and the rest is what i have to do. also athe bottom of this topic is complete maple sheet if You need it.

Best regards,

AM

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01-19-2016
12:30 AM

01-19-2016
12:30 AM

Re: help with space shuttle dynamics, differential equation

See please one animation

and welcome Celestial mechanics with Mathcad (Небесная механика с Mathcad)

and send please the Maple-sheet

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01-19-2016
01:54 PM

01-19-2016
01:54 PM

Re: help with space shuttle dynamics, differential equation

Dear Professor,

I tried to send a message to You but i can't and don't know why. Would really appreciate Your help. If You need some additional information please send a message to me.

Best regards,

AM

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01-20-2016
05:20 AM

01-20-2016
05:20 AM

Re: help with space shuttle dynamics, differential equation

Could You please help me ?

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01-19-2016
07:18 AM

01-19-2016
07:18 AM

Re: help with space shuttle dynamics, differential equation

ok I'll check this. im sending the maple sheet as You asked. If You know how to do it I would be very thankfull with any help.

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01-21-2016
07:53 AM

01-21-2016
07:53 AM

Re: help with space shuttle dynamics, differential equation

Attached is a Mathcad15 version (without comments).

These graphs look a little different from those in your .png file, but the transition times there are different from those given in the Maple file.

Alan

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01-23-2016
06:10 AM

01-23-2016
06:10 AM

Re: help with space shuttle dynamics, differential equation

thank You very much. Im very thankfull. but I have a few questions.

can I put everything the same as this in mathcad prime and will it work ?

what should I do to get the same graphs ?

and what about the last part where we define vt and what about a acceleration graph ?

Best regards.