72 replies to this topic

[PAP]

Nice to see my "Broyden" function in action .
I can also see that the simple example files I added in LuaNumAn 1.50 (like "XBroyden") are indeed useful .

Just a remark: You don't explain how you obtained the initial guess {0.02,0.2,0.2}. Do you have any physical reasons to select these values? I think that an explanation will be useful.
Note that your initial guess is too close to the correct result. I bet that "Broyden" is able to find the correct result with a less accurate initial guess.

Btw, you used LuaNumAn's built-in numerical approximation of the Jacobian. You can also provide the Jacobian manually, by defining a function for this.

[unique33]

Just a remark: You don't explain how you obtained the initial guess {0.02,0.2,0.2}. Do you have any physical reasons to select these values? I think that an explanation will be useful.
Note that your initial guess is too close to the correct result. I bet that "Broyden" is able to find the correct result with a less accurate initial guess.

there are some ways which are mentioned in the books:
First way:

first we asume that c=0,a=0 the from K2

b=0.1577413

now assuming b=0.1577413,a=0 from K3

c=0.2405732

now from k1 with b=0.1577413 and c=0.2405732

a=0.0180522

Now we can use {0.0180522,0.1577413,0.2405732} as the initial guess.
the result is the same as my post.

Second way:
finding c=f( a , b ) through dividing first equation by the second and solving a set of equations with 2 variable.

Btw, you used LuaNumAn's built-in numerical approximation of the Jacobian. You can also provide the Jacobian manually, by defining a function for this.

I wanted to solve the equation as simple as possible.and the result is accurate.

Although finding the initial guess is a little bit hard , but before having Broyden I could just find the initial guess and I could not continue to the reach to the accurate result. thanks to Broyden and Thanks to you .

------------------------------------------------------------------------------------
What is Nowruz ?
Greeting

[manuelfrank12]

ok thanks for the answer
i going to do it

[manuelfrank12]

thanks
i can do it
sorry for make u lost your time

ok i am industrial mechanic ingeneering student
i like see topic of control teory
i going to try to help

[unique33]

Engineering Discussion Forum
Feel Free To Introduce Your Projects , Teams ,...

I started this forum to make projects and activities that may not contian anything about Classpad 300 calculator . So you can Post anything that you like about your Engineering Field.

click here

It has many features , for example it supports many languages .
but please post your messages in English to be useful for visitors except the free discussion forum.

Includes:

. Engineering Discussion Forums :

. Mechanical Engineering Discussion Forum
- Discuss
- Projects
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. Civil Engineering Discussion Forum
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. Chemical Engineering Discussion Forum
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. Computer Softwares :

. Mechanical Engineering

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. Mathematics :
. Engineering Mathematics
. Numerical Analysis
. Calculus

. Directory
. Direction to Engineering / Mathematics Sites & Projects (Completed / Under Development)

. Free Discussion Forum
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Any suggestion Let me know
.If you feel Something is lossing
.If you feel something should be deleted
,....


php Advanced File Transfer Manager
2 Mb per each file
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Mathematical Symbols
It is under development now , to see a sample use the following link:
Mathematical Symbols Sample
It will be available through the smilies.
-------------------------------------------------------
-> 11 Styles which you can simply go to your profile and change to your desired Style .
-> Now with Morpheus Style As the default which is under development and new changes every day with a nice view .

[unique33]

ok i am industrial mechanic ingeneering student
i like see topic of control teory
i going to try to help

But I will pass it next term.

[omegavirus]

Selection of Materials and Processes


Here is the new version of my program whit some documentacion and also and example to get use about what it does



Selection of Materials and Processes

Another link: Selection of Materials and Processes


Sorry about the mistakes in the PDF...

[omegavirus]

There is a version of Selection of materials and processes ; this version has been fixed of some errors?

The errors in the PDF documentation have been updated and also a bug that happened when you try to launch the program from My Lua Programs has been fixed?

Selection of materials and processes

[unique33]

Thanks . I was waiting for the new version of cplua for the begining of the summer but orwel was busy so we(me and my friends) desided to work on a dynamic website which is going to give mechanical engineers good sources and Web based learning .
The Site and the content is ready but I myself do not have time to upload the content such as pdf files , tutorials ,... . because I have an enterance exam this year and I should study .

[unique33]

the Download center of the Mechanic source started to share the Mechanical Engineering Documents !
we are uploading 1 GB pdf files and video tutorials to the web in the near future .
( the site is under development and is not completely ready but the download center is ready to share documents)

Download Mechanical Engineering Documents Here

. Msource.org team
. msource.org/en ( Msource in English )

what Is your Idea about such a community ?

[Behnoud]

Great idea, Great work!
Is any new Classpad Mechanical engineerin Application added?

[The_AFX_Master]

Great idea, Great work!
Is any new Classpad Mechanical engineerin Application added?

btw, Omegavirus and me are working on a mech eng app, If you want to join....
there is no code at the moment, We're developing some areas of coding and numerical analisys before start seriously.

[unique33]

Great idea, Great work!

thanks.

Is any new Classpad Mechanical engineerin Application added?

At the time I do not have a spesific project in my mind. and I do not have the time too.
I think the 1 GB Engineering Documents will be a good source for mechanical engineers in the future.
thats the msource.org team goal .

[Behnoud]

btw, Omegavirus and me are working on a mech eng app, If you want to join....
there is no code at the moment, We're developing some areas of coding and numerical analisys before start seriously.

I'm not a coder, but if I can help you, don't hesitate to inform me in which area of activity!

thanks.

At the time I do not have a spesific project in my mind. and I do not have the time too.
I think the 1 GB Engineering Documents will be a good source for mechanical engineers in the future.
thats the msource.org team goal .

Can I help u gathering documents?

[unique33]

Can I help u gathering documents?

we have provided 1 GB documents . the work that is remaining is the uploading.
If you have any Document source , then you are welcome to the msource.org community . send me private message then I will give you the detail about how to share it with the others .

[unique33]

Mechanical Engineering Source :

www.msource.org .:Mechanical Engineering Source:.
---------------- Home Page -------------------------- Main Page ---------------------- Engineering Documents

---------------- Project manager ------------------------- Forums


We have worked on it for one year and it is now ready to use . With the hope that we see an active mechancial engineering community .

see the home page to get more about Mechanical Engineering Source.

[Tixa]

Hi! I'm studying civil engineering and now I need a program for mechanics of fluids,that solves colebrooke-white equation, problems of type 1,2 and 3. Do you know about any program that solves it? I've been searching but I can't find any and I need it for my exam...I've been also trying to program it in my class pad, but I don't know exactly how to do it...If you could help me I'd be very greatfull!
Thank you!

[Behnoud]

Is there any developement for CATT that support other fluids?

[unique33]

Hi! I'm studying civil engineering and now I need a program for mechanics of fluids,that solves colebrooke-white equation, problems of type 1,2 and 3. Do you know about any program that solves it? I've been searching but I can't find any and I need it for my exam...I've been also trying to program it in my class pad, but I don't know exactly how to do it...If you could help me I'd be very greatfull!
Thank you!

try it using the numsolve of the classpad I think it is able to solve it , If I remember truly the equation have two sqrt(f) , one on the left hand side of the equation and the other on the right hand side in denominator .

Is there any developement for CATT that support other fluids?

I,m currently studying for entrance exam , I will be back at the comming spring or maybe later !!
I have some idea to make it possible that the CATT software be able to import the user defined tables automatically through a wizard. ,... but I do not have enough time these days.

[gianluke7]

CATT:

http://rapidshare.co...2/catt.zip.html

Edited by gianluke7, 21 January 2010 - 12:31 PM.

[unique33]

here is some refreshed links :

CATT
CATT Help
CPlua .8C
Cycles

[The_AFX_Master]

OMG...

Unique!, Quite a bit since we both logged in

How you doing?

[unique33]

Hello
I have finished my studies and seeking for my job .

regards
unique33

OMG...

Unique!, Quite a bit since we both logged in

How you doing?

[vief]

hi
is there any app for linear control systems?

[javsalo]

> CLASSPAD AIDED THERMODYNAMIC TABLES

. Saturated Water
. Superheat Vapor Water
. Compressed Liquid Water
. Saturated Solid-Saturated Vapor ,Water



* "The Power Of Water Has Changed more in this world than emperors of kings."
(Leonardo da Vinci)

> Also Includes E-Notes Contianing Thermodynamic Cycles Through An E-Activity File:

. Brayton Cycle (Simple Gas Turbin)
. Gas Turbin With Regenerator
. Erricson Cycle (Simple & With Regenerator)
. Modification Of Brayton Cycle In Direction Of Erricson Cycle
. The Air Standard Cycle For Jet Propulsion
. Reciprocating Engine Power Cycles
. OTTO Cycle
. The Diesle Cycle (Compression - Ignition)
. The Stirling Cycle (Simple & With Regenerator)
. The Vapor Compression Refrigeration Cycle
. Air Standard Refrigeration Cycle

*************************************************

> Notice :
The programmer of this software has used his best efforts
in preparing this software. These efforts include the development ,
research , and testing of the theories and programs to determine
their effectivness.The programmer make no warranty of any kind with
regard to this software. The programmer shal not be liable in any event
for incidental or consequential damages in connection with ,
or arising out of , the performance , or use of this software.

*************************************************
> The software needs CPLUA version .8C.
CPLUA is An Add_In for ClassPad 300 which
is maintaining by Orwell.
*************************************************

Downloads:

CATT
CATT help
Cycles E-Notes
CPLUA .8C


(This vesion of CATT just run on this version of Cplua ,
Do not use Older or Newer versions for now .)

*************************************************
> Example:
. Siplified Nuclear Power Plant :

A Somewhat simplified flow diagram for a nuclear power plat is
given in Figure .Mass flow rates and various states in the cycle
are shown in the accompaning table.


The cycle includes a number of heaters in which heat is transferred
from steam , taken out of the turbin at some intermediate pressure,
to liquid water pumped from the condenser on it way to the steam drum.
The heat echanger in the reactor supplies 157 MW, and it may be assumed
that there is no heat transfer in the turbin.

a. Assuming the moisture separator has no heat transfer between the two
turbin sections, determine the enthalpy and quality ( h4,x4 )

b. Determine the power output of the low-pressire turbin.

c. Determine the power output of the high-pressire turbin.

c. Find the ratio of the total power output of the two turbins to the
total power delivered by the reactor.

e. Determine the quality of the steam leaving the reactor.

f. What is the power to the pump that feeds water to the reactor?




a)
> Control Volume : Moisture Separator

1st law: Q'+m'3h3=W'+m'4h4+m'9h9

W'=Q'=0 -> m'3h3=m'4h4+m'9h9

h4=2673.89 kJ/kg

> CATT:
General Entrance : P=310 kpa , h4=2673.89 kJ/kg

Result:x4=0.9755

-------------------------------------------------
b )
> Continuity Equation:
Sigma m'i=Sigma m'e

m'4=m'5+m'8
m'5=58.22-2.772 =55.44 kg/s

> Control Volume : Low Pressur Turbin:
1st law W'LPT=m'4h4-m'5h5+m'8h8

W'LPT=22.49 MW
--------------------------------------------------
c )
> Control Volume : High Pressure Turbin
1st law W'HPT=m'2h2-m'3h3-m'12h12-m'17h17

W'HPT=18.4 W

--------------------------------------------------
d)
W't=W'HPT+W'LPT=18.4+722.49=4.89 MW

W'T/Q'=40.89/157=0.2604

--------------------------------------------------
e)
> Control Volume :Reactor
1st law. Q'+m'2h2=w'+m'21h21

W'=0
157000+1386*1221=1386 h21

h21=1334.27 kJ/kg

> CATT
General Entrance : P=7310 kpa , h21=1334.27 kJ/kg

Result: x21=0.0348

--------------------------------------------------
f)
Cotrol Volume : Pump

>CATT :
General Entrance : P19=7240 kpa , T19=277 c

Result : No Result ! (I assume that you know the reason)
Instead yiu can use T-sat.Liquid

T sat.lig =277 c
Result :
hf=1220.4180

1st law
Q'+m'19h19=W'p+m'20h20
Q'=0
W'P=1386(1220.4180-1221)=-806.652 kW

thank you boy,i see your post but your image and attachment file droped or removed and i can't see them please upload them again.

is it(your help file) in this post?

[unique33]

here it is : download

[Andreé]

Hello there unique33; first i have to give you thanks about CATT program for classpad, my casio is a 330 and i'm in the 2 year of Industrial Engineering , i have a new course that call thermodynamics, and i pretend to use your beta software to this, but i have some troubles to use the software itself...

-i followed all the instructions step by step as you explained in installation pdf
-the program run well(means it get started), but the problems starts when i try to calculate (introducing random values) on P-T, P-V, P-x, T-x, P-sat.v, T-sat.v, etc. interfaces


for example (values are at random): :unsure:
when i introduce values in PT case
P = 101.33 kpa
T=100 ºC
it shows me this error message:
:!: RUNTIME ERROR:
CATT/PT:164:attempt to compare nil with number
Press[<-] or EXE

when i introduce values in Px case (values are at random) :unsure:
P=100kpa
x=0.20
it shows me another kind of error message:
:!: CATT/Px:123:attempt to perform arithmetic on field '?' <a nil value)
Press[<-] or EXE

this kind of errors comes each time when i use the thermodynamic cases, i dont know what is bad, maybe, i'm using your software in a wrong way or maybe my classpad isn't the apropiated for this software, maybe i dont know how to using the software at all, by the way, if you or anybody here have an user manual that would help me.

i appreciated your help reading my case; and any help from members of this community, if anybody could to please i need all help about this issue, i'm new user of this forum and hope my english will be good enough!!

Thank you!!! :D :D

[unique33]

hello,
You should use The Lua version that I mentioned in the previous posts , As I remember some Lua installations does not handle my project and produce errors .
The Lua version that I used for programming is : CPLUA .8C
Here it is :
http://hotfile.com/d.../Cplua.zip.html

Enjoy!

Edited by unique33, 18 September 2011 - 08:14 AM.

[Andreé]

woooooowwwwww, my frined thank you so much, the problem was the Cplua component, i'm so glad for this great idea(mean CATT of course ) man you rock!!!!

[MicroPro]

To everyone, the new working link for downloading CATT is:

http://www.classpad.ir/download.php?src=lib&file=CATT.zip