"This is fairly easy, but you will have to do some modifications to software to accomplish what you want. The standard controller doesn't actually use the rate process variable but uses a standard PID. The guys can correct me if…"
-
Larry Grater
- Male
- Fort Worth, TX
- United States
- Blog Posts (3)
- Discussions (48)
- Groups (3)
- Photos (2)
- Photo Albums
- Videos
Larry Grater's Groups
-
Model making for FlightG…
16 members
-
ArduPlane User Group
691 members
Larry Grater's Discussions
Auxilary TM Output Using UART2/Serial2
Started this discussion. Last reply by Dan Ho Feb 8. 15 Replies 0 Likes
I'll preface by saying that I'm not a C++ developer. There are multiple references to APM2/2.5 support for UART2 on the forum. Most references don't seem to come to conclusion. I think we have…Continue
NMEA Lat/Long Parser Error for Arduplane 2.40 and Subsequent
Started this discussion. Last reply by Randy Aug 15, 2012. 1 Reply 0 Likes
If you are not using NMEA disregard.I recently discovered what I think is a parsing error for the NMEA lat/long decimal minutes in the latest version(s) of the GPS library. I found this when doing…Continue
Compilation Issues with Arduino 022 or 023?
Started this discussion. Last reply by Larry Grater Feb 7, 2012. 1 Reply 0 Likes
I wanted to make a minor change to uncomment WITH_NMEA_MODE, run a GPS test in Mission Planner for Venus GPS (didn't get that far). I got compiler warnings with both 2.27 and 2.28 using both 022 and…Continue
ArduIMU V2 + HMC5883L
Started Sep 30, 2011 0 Replies 0 Likes
I'm currently flying the ArduIMU with DragonOSD in an Eraser XE high performance glider. This is working well and I realize that I don't need accurate yaw (using v. 1.6f). I am looking forward to…Continue
Larry Grater's Page
Latest Activity
Larry Grater replied to A. Fleyfel's discussion Setting up stabilise mode to damp rotation but not auto-levelLarry Grater replied to Ralph Wu's discussion Sending APM to near space and return?"The video below link below is interesting because the RC Explorer guys talk about how hard this is and that it took 4 tries to get satisfactory results. Well, they didn't even scratch the surface.
Here's a link to the post…"
Larry Grater replied to paul riseborough's discussion A batch of faulty Pitot/Static probes - how to detect and fix in the group ArduPlane User Group"Great write-up; and complete with a fix! I found that all 3 of my probes leaked somewhat. This one thing that may have contributed to measuring only about 1/2 of the dynamic pressure on my North Texas Near Space 2 flight. My fix…"
Larry Grater replied to Ralph Wu's discussion Sending APM to near space and return?"Last weekend NTNS-3 hit its target LZ at 9k AGL from a drop at 48k. Video to follow."
Larry Grater replied to Rick Stewart's discussion Connecting an APM 2.0 to other devices."Rick,
Did you get this working using the GPIO pins or did you go a different direction? My application (an ACS) would need 6 channels.
Thanks,
Larry D. Grater"
Larry Grater replied to Andrew Tridgell's discussion ArduPlane 2.69/2.70 released"I think we're pulling the thread a bit off-side, but...
To enable the Challinger controllers you need the following in APM_config.h:
#define APM_CONTROL ENABLED // This flag enables the new controllers…"
Larry Grater replied to Andrew Tridgell's discussion ArduPlane 2.69/2.70 released"You might look at the Jon Challinger controllers since one goal of that development was smoother control. There's also a built in rate limiter for pitch and roll. This is documented here:
2.60 Release Notes
Make sure to read the…"
Dan Ho replied to Larry Grater's discussion Auxilary TM Output Using UART2/Serial2"Yes, first I need to learn a bit about Mavlink and that's made me aware of Qgroundcontrol now which sounds as though it might be better suited to receiving custom telemetry ... not sure yet. Lots to investigate.
One thing I want to…"
John replied to Larry Grater's discussion Auxilary TM Output Using UART2/Serial2"If it were me I would just start editing mavlink_send_text(chan,severity,str) or any of those methods and see what happens haha. One of those hundreds of listed mavlink functions would probably (maybe?!) send back data to hilch etc?
Anyway, my main…"
Dan Ho replied to Larry Grater's discussion Auxilary TM Output Using UART2/Serial2"Hi John,
Something tells me this is going to be a lot of work ... but still fun (or at least educational). On the Mission Planner end, it looks like there may be some "data slots" where extra telemetry could be placed such…"
John replied to Larry Grater's discussion Auxilary TM Output Using UART2/Serial2"It should work. Actually, ideally that's what I wanted to do as well, but I didn't want to alter the source too much as I am relatively new to this. Please reply here if you get it working!"
Dan Ho replied to Larry Grater's discussion Auxilary TM Output Using UART2/Serial2"Hi All,
This is very cool. Since you guys seem to be able to modify the APM code successfully, I'm wondering if any of you know if this method could be used to send telemetry data from my Arduino Due to the APM and then have Mission…"
Larry Grater replied to Andrew Tridgell's discussion new ArduPlane release coming soon!"A way to do bungee launch throttle suppress could be to monitor the longitudinal acceleration and watch for the fall off -and- build in a delay to full on. The thresholds for time and acceleration would be parameters to accomodate different…"
Larry Grater replied to Ralph Wu's discussion Sending APM to near space and return?"1) I have sample code that does this plus detect free fall
2) Depends. Balloon predictions should help you determine where to launch. Battery duty cycle needs to be tested on the ground. Add margin for temperature.
3) In general yes but the battery…"
Larry Grater replied to Justin L's discussion Hover with a 3D acrobatic plane?"This does sound like an interesting project. I agree with Soren, most of the building blocks are there. You could probably do this in steps. i.e. develop code that would stabilize the plane after you've already done the…"
Profile Information
- About Me:
- Aerospace Engineer with 27 or so years experience in aerodynamics and flight control.
- Tell us a bit about your UAV interest
- I've been in RC for years, interested in autonomous flight DIY.
- Hometown:
- DFW
Larry Grater's Photos
Larry Grater's Blog
NTNS-2 Flies to 88k ft with Stinger 64 Airframe (partial success)
Posted on August 24, 2012 at 4:00pm 23 Comments 1 Like
On 5/18/12 North Texas Near Space (NTNS-2) achieved a maximum altitude of 87959 ft over a sparsely populated section of North Texas. The flight was…
Continue Stinger 64 HAB Early Integration Pictures with APM2
Posted on July 17, 2012 at 9:30pm 8 Comments 2 Likes
I've just finished the build and will begin early full up integration testing in the next day or so on NTNS-2. This is a highly modified Stinger 64 with APM2. There are really 2 airframes. One is for flight testing, gain tuning, learning a little about APM2. I have to admit that there have been several issues. …
APM-1 Ride-Along HAB Flight to 86688 ft (Dual Launch, also from Albuquerque)
Posted on May 29, 2012 at 8:30pm 5 Comments 4 Likes
On 5/20/12 North Texas Near Space (NTNS) and Project Soar collaborated on a dual launch during the annular eclipse. Albuquerque was directly in path of the eclipse. The NTNS payload had most of the electronics that I had intended for a guided flight. That airframe is no more, but I have some data that I'd like to share with the group as a result. The dual launch was a great target of opportunity…
ContinueComment Wall
- No comments yet!
Social Networking
Top Content
Contests
Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.A list of all T3 contests is here.
Groups
-
ArduCopter User Group
1298 members
-
Moderators
24 members
-
Documentation Editors
51 members
-
Japan ArduCopter Group
51 members
-
ArduRover User Group
185 members
Advertisement
© 2013 Created by Chris Anderson.
Powered by
