Replies to This Discussion

Permalink Reply by Aizzat on July 11, 2012 at 9:53pm

Futhermore, if you read the datasheet from MTK GPS that was used in APM2, it capable for AGPS to get more accurate reading. 

Link here: https://store.diydrones.com/MediaTek_MT3329_GPS_10Hz_p/mt3329-01.htm

-Support AGPS function ( Offline mode : EPO valid up to 14 days )

 

Is there any library that I could use to enable this AGPS function ? Do I need to add extra hardware ?

• ▶ Reply

Permalink Reply by Barrett Ames on July 15, 2012 at 8:46am

I don't know about the AGPS function. 

In the past i've sucessfully used PID to remove jerky motion in navigation on a very similar project. Increasing the accuracy of the GPS won't make it less jerky, in fact it might make it worse. 

• ▶ Reply

Permalink Reply by Aizzat on July 15, 2012 at 6:22pm

Hi Barret, 

Do you have any rough idea how do you control it using PID? What is the steady state error are you trying to achieve ? From what you said, seems like PID could solve my problem. I would like to try it if this is possible. 

• ▶ Reply

Permalink Reply by Barrett Ames on July 16, 2012 at 8:50am

I used heading for my PID. So I calculated the heading i wanted to be going, and the heading that i actually was going. However I suppose you could use cross track error. It would be good for you to find a good tutorial on PID, because they are very easy to write, but can be rather tricky to tune. 

• ▶ Reply

• ‹ Previous
• 1
• 2
• Next ›
• Page