TMA by least square method

Dr.Sid · 11-08-07, 08:16 AM

Ok .. here is the demo: http://roger.questions.cz/other/AutoTMA.zip

It is useless for actual TMA, it only tests and demonstrates the method.
White circles represents ownship. White lines are the LOBs.
Blue circles is test target. It is used to generate the LOBs.
Green circles is the solution computed from the LOBs.
You can use left mouse button to move the test target, and right mouse button to change it's course and speed. Solution is recomputed. It should place the green circles into the blue ones.
Note that with manual test target placement it is almost impossible to create 'no solution' situation. You simply won't be able to create the LOBs parallel enough and even slight change in direction will be taken into acount and solution will be found (end pretty exact one too).

This uses the matrix mentioned above. I only had small glitch in matrix determinant, it was easy to find and fix when I knew the matrix is OK.

XLjedi · 11-08-07, 08:30 AM

Why would you say it's useless?

I assume the green and blue dots represent both actual track and formula track.

Dr.Sid · 11-08-07, 08:38 AM

Quote:

Originally Posted by aaronblood

Why would you say it's useless?

I assume the green and blue dots represent both actual track and formula track.

Blue ones are the actual track, green ones is the formula. With leg in ownship course I haven't found case where green ones don't match blue ones.

The tool is useless as it is. You cant edit ownship location or enter LOBs. You can't use it to detect YOUR sub. That's how I meant it. The formulas are not useless, they are even better then I thought ! I guess it could be made part of MoBo easily. I could also make some standalone tool for that but I would need to copy so much of MoBo functionality, that it gives really no sense.

Sorry if something is not clear, English is not my native language.

XLjedi · 11-08-07, 09:25 AM

Well, if you like I would be happy to add your formula as a MoBo tool...

It looks like something I was wanting to work toward anyway and this would save me probably a month of research.

If you decide that you'd like to contribute your code to the MoBo project, you would be acknowledged as a member of the MoBo Dev Team and given appropriate credit in the application.

In addition to updating the 1.1 Beta, I'm also working on developing a new retained-mode vector graphics interface (MoBo 2.0, or "MoPro"). I may rename the MoBo app in version 2 cuz I'm tired of searching for "MoBo" and finding a bunch of junk related to PC motherboards... hindsight is always 20/20.

Dr.Sid · 11-08-07, 09:32 AM

Quote:

Originally Posted by aaronblood

Well, if you like I would be happy to add your formula as a MoBo tool...

It looks like something I was wanting to work toward anyway and this would save me probably a month of research.

If you decide that you'd like to contribute your code to the MoBo project, you would be acknowledged as a member of the MoBo Dev Team and given appropriate credit in the application.

In addition to updating the 1.1 Beta, I'm also working on developing a new retained-mode vector graphics interface (MoBo 2.0, or "MoPro"). I may rename the MoBo app in version 2 cuz I'm tired of searching for "MoBo" and finding a bunch of junk related to PC motherboards... hindsight is always 20/20.

Ok .. check your private messages for contact.

XLjedi · 11-08-07, 09:30 AM

Quote:

Originally Posted by Dr.Sid

Blue ones are the actual track, green ones is the formula. With leg in ownship course I haven't found case where green ones don't match blue ones..

Could you adjust your test case to add a small amount of random LOB error? Maybe +-2°

I'd like to see how the formula behaves when interpretting less precise human plots.

11-08-07, 08:30 AM	#2
XLjedi Ace of the Deep Join Date: Jun 2005 Location: Palm Beach, Florida Posts: 1,243 Downloads: 53 Uploads: 8	Why would you say it's useless? I assume the green and blue dots represent both actual track and formula track. __________________

11-08-07, 09:25 AM	#4
XLjedi Ace of the Deep Join Date: Jun 2005 Location: Palm Beach, Florida Posts: 1,243 Downloads: 53 Uploads: 8	Well, if you like I would be happy to add your formula as a MoBo tool... It looks like something I was wanting to work toward anyway and this would save me probably a month of research. If you decide that you'd like to contribute your code to the MoBo project, you would be acknowledged as a member of the MoBo Dev Team and given appropriate credit in the application. In addition to updating the 1.1 Beta, I'm also working on developing a new retained-mode vector graphics interface (MoBo 2.0, or "MoPro"). I may rename the MoBo app in version 2 cuz I'm tired of searching for "MoBo" and finding a bunch of junk related to PC motherboards... hindsight is always 20/20. __________________

11-08-07, 08:16 AM	#1
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	Ok .. here is the demo: http://roger.questions.cz/other/AutoTMA.zip It is useless for actual TMA, it only tests and demonstrates the method. White circles represents ownship. White lines are the LOBs. Blue circles is test target. It is used to generate the LOBs. Green circles is the solution computed from the LOBs. You can use left mouse button to move the test target, and right mouse button to change it's course and speed. Solution is recomputed. It should place the green circles into the blue ones. Note that with manual test target placement it is almost impossible to create 'no solution' situation. You simply won't be able to create the LOBs parallel enough and even slight change in direction will be taken into acount and solution will be found (end pretty exact one too). This uses the matrix mentioned above. I only had small glitch in matrix determinant, it was easy to find and fix when I knew the matrix is OK.