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Hex redundancy on 3.6.X

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@GootyS wrote:

Hi All,

A few years ago there was talk about Hexacopters falling out the sky due to no redundancy support on a Hex with a motor failure. Some had a solve of reducing YAW to 0 and using simple mode to bring the Hex back all this on 5 Motors. Is this a standard in the latest code? Apologies for this question but its been some time for me since using Ardupilot.

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Large x8 crash - help explain cause

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@tegwin wrote:

I have a large X8 running T-motor U8 170Kv motors (28x9.2 props). Current take off weight around 13Kg hovering at around 40% throttle

Frame is not as stiff as you’d like!

Aircraft took off and hovered nice enough on default tune. Flew forward gently and as I stopped the aircraft it gently rolled over to the right and ended up upside down before it hit the floor.

The vibrations are high on this machine so that may have contributed to the crash. What id like to understand is exactly what chain of events has caused the aircraft to crash so I can learn from mistakes for next time.

Can anyone take a look at this log and explain the steps that lead up to the premature termination of the flight? I’m sure there’s something I can learn from this.

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Elevator channel twitching with Throttle input in all Stabilized flight modes

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@Jordan_Brock wrote:

I checked the servo output, and it is not just the servo, the Elevator output actually starts moving and bounces around in every controlled flight mode (doesn’t happen in Manual or Acro).

Using ChibiOS with Pixhawk 1 board and PPM encoder with Spektrum DXE. Using Elevon setup, but I changed the servo output to Aileron/Elevator to further test, and it seems to be the Elevator channel only.

I also tested the system with a Turnigy 9X to eliminate the PPM encoder from being faulty. Same exact issue. Switch to Manual and the issue goes away, but in every other flight mode (save Acro) the servos jitter with any throttle input.

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Zubax GNSS 2 how to connect to Pixhawk mRo?

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@Amozov_x wrote:

Good afternoon. I have read all the instructions. But still, the pixhawk does not see not the gps module, not the compass, not the barometer according to can. Firmware 3.6.11.:frowning:

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No matter any combination of Servo1/2 & RC1/2 reversal and elevons, stabilized roll is always backwards

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@MrDysprosium wrote:

Mission Planner is proving to be a huge pain when it comes to elevon/vtail…

Anyway, I see a few threads on this same question go mostly unanswered.

My current setup:

TX:
No channels reversed
No mixing

RX:
CH1 -> Right Elevon
CH2 -> Left Elevon
CH3 -> Throttle

MissionPlanner
Servo1_Reversed -> 0
Servo2_Reversed -> 1
RC1_ Reversed -> 1
RC2_Reversed -> 1

In manual mode, the above connections work just perfect.
In Stabilization, the sticks still work just fine, but the auto-stablize always rolls in the wrong direction to correct.

My pixhawk is positioned correctly, artificial horizon proves that to be true… But no amount of screwing with those 4 settings has ANY effect on elevon roll in Stabilize mode. This leads me to believe there is a bug in MissionPlanner, but maybe there’s some other setting I’m missing?

I’m swapped channels around in my receiver, putting left on CH1 and right on CH2, and after reconfiguring I STILL have no change on the elevon roll. further, swapping CH1 and CH2 on the receiver actually has NO effect… which is magic. How is that even possible?

Bug, right?

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Pixhawk Mini 3DR

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@RizHass wrote:

Hi,
Background:
I have been flying my fixed wing with Pixhawk Mini using QGC, but the mission mode is hit and miss. So I decided to flash it with Arduplane FW, and now I am using Mission Planner.

Problems:

  1. In the “Servo Output” no response from the throttle can be seen in the update bar; however, I can see it moving in the “Radio Calibration” screen. I have done calibration multiple times with same results.
  2. In the Servo-Output screen if I check mark reverse box motor starts to spin full speed.
  3. Arming, does not require holding the rudder stick to the right for few seconds after safety switch is engaged?

Setup:
Channel 1 and 2 are setup as elevons.
Channel 3 is servo.
Channel 4 Rudder (But the plane has no rudder)
Channel 8 flight modes.

In the QGC, channel 4, was throttle and I had the ESC wire hooked into pin-out #4.

Appreciate some help.

Thanks,
Riz

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Using ArduPilot/PX4 with custom SITL simulation

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@Prasad_Raghavendra wrote:

I am building an open-source standardised SITL using Webots for object-tracking. How can I add ardupilot to my Webots SITL for Quadcopter?

I have been working on this since past 1 week. But, my controller is barely usable and I would like to integrate Ardupilot/PX4. (Specifically because I had used APM hardware before and I would like to simulate that). However, whenever I search for APM SITL, I only get results for ROS-Gazebo SITL.

Any help would be greatly appreciated!

P.S.: Please note that I have not included any links deliberately. I would be more than happy to update this post and share links of the open-source project & my research if needed.

Also, if this can be created as a feature request in Github ArduPilot repo, I would be more than happy to contribute if I am given some pointers regarding the same. (Please note that I have worked on ROS and Gazebo using Ardupilot before. However, I am not very familiar with ArduPilot codebase per se)

Reference: https://www.facebook.com/groups/ArduPilot.org/permalink/2651046521585191/

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Install SITL on Raspberry pi 4 b , os: raspbian buster

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@shamaieli84 wrote:

Hello,
I’m trying to install SITL on Raspberry pi 4 model b , os: raspbian buster.
I follow the procedure from : Setting up the Build Environment (Linux/Ubuntu)
(It worked fine on raspberry pi 3 and on ubuntu virtual machine…)
when I get to run: Tools/environment_install/install-prereqs-ubuntu.sh -y the script fails.
Any Idea?

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Oneshot - what does the ESC/channel output value mean?

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@ardupilot.td wrote:

I use Oneshot125 on my copter. When I compare the output values for the different motors they are around 210 and differ by 9 at max. Unfortunately I do not understand what these values mean since I only used PWM with values from 1000 - 2000 before.

Can someone help me?

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Http://firmware.ardupilot.org/ no access from laptop

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@Ilya_Smolnikov wrote:

the situation is this, Since the spring of this year, access to the site with the firmware has stopped working. As a result, I started an investigation and the provider answered me that they did not block this site after contacting Roskomnadzor and they officially answered me that it was also not blocked. the site, after the provider did something, after my complaint This site started working on my mobile device, but from the same wi-fi from the laptop access is still unavailable. Windows diagnostics showed that port 80 is unavailable or 60, I don’t remember what to do, tell me to work only VPN. Fucking at all … I’m from Russia

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Pitch oscillations

Choosing the right firmware for Chinese Pixhawks

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@neo2001 wrote:

Hello! :slight_smile:

Recently I got two different Chinese Pixhawk flight controllers. Both are very similar. The first one doesn’t have any revision information on the PCB, only “Pixhawk Pro” is printed on the case. Mission Planner’s (v1.x) firmware update dialog used the “fmuv2” hardware type for this board and it seems to work fine with it.

The other one is a much more common “Pixhawk 2.4.8” which comes with “PX4v2” printed on the PCB. Mission Planner first asked me, if this was a “Cube …” and after I clicked “No” it installed the firmware for the fmuv3 hardware type.

There are picture of both devices attached to this post.

This is all very nice, but I’m very nosy and want to know more! :slight_smile:
Therefore I have some questions:

1.) As far as I understand, in the past NuttX was used as operating system for the MCU, but it is replaced by ChibiOS. The current (stable) PX4v3 firmware image seems to still use NuttX, while fmuv3 uses ChibiOS. Is this the only difference between these two images? And if yes: Why? How is decided which device/firmware image gets which OS?

2.) Is there still a free choice between NuttX and ChibiOS? Or in other words: Does it still mage sense to use NuttX for certain devices? I’m a great fan of CLIs (using Linux for decades now) and the possibility to directly interact with the OS, but as I found out after an hour of searching and reading, ChibiOS doesn’t provides such a thing?

3.) I read about a bug that limits the STM32’s memory to 1 MB instead of 2 MB. I also read, that “v2” is usually for boards/MCUs having this bug and “v3” is for boards using the same design but a newer (bug-free) MCU? Is this correct? And if yes: Is this the only difference between, say, PX4v2 and PX4v3 or fmuv2 and fmuv3?

4.) Using NuttX it’s possible to use the “var all” command (using the NSH shell) to check the MCU version and if the chip has the bug. But if the device is running ChibiOS , how can I optain the same information without the shell/CLI?

5.) As far as I understand, the Pixhawk has a secondary MCU for I/O operations. If the main firmware is changed/updated, will the firmware for this co-processor be updated, too? Does this firmware depend on the OS used?
I read about holding the switch down while powering up the device to initiate the update procedure. Is this something that needs to be done after every update? Does every firmware image contain a firmware for this secondary MCU? Is it possible to see the firmware version used? Or is there really no need to worry about that?

6.) Is there something like a syslog, where all system-related messages are displayed? There is a message tab in the Mission Planer, but I’m looking for something more verbose, more detailed?

7.) I read about a boot.log file that will be created on the SD card (in the LOG folder). But whenever I checked, I never found the file?

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How can I increase Pitch & Roll rates? RC_FEEL_RP

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@n8lbv wrote:

I’d like to get pitch and roll set a little faster for flying in acro mode.

RC_FEEL_RP is already set at 100 which I think is the fastest this setting will take.

And I am sending full deflection from the transmitter.

I’m used to much faster pitch and roll rates on my old F450 multiwii copters and
Prefer to have it set considerably faster.

Please advise and thanks!

F450 clone frame
EMAX 2213-935KV motors
10 X 4.5 props
An APM 2.8 controller
And the latest that will run on it (3.2.1)

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GPS Week Number Rollover issue

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@hosein_gh wrote:

Hi everyone
As we know that many old gps dvices will have the GPS Week Number Rollover issue from April 6th this year.
I want to know that will ardupilot affected by this issue? Or its solved in y2k problem
Thanks
@rmackay9
@tridge

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915Mhz Telemetry module is Blanking laptop screen

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@Jordan_Brock wrote:

Hi, I recently bought a laptop with intended use for a ground station for Mission Planner + Pixhawk.

Everytime I plug in the telemetry radio (Standard 915mhz) the Laptop screen has a chance to go blank. The only way to regain the screen is to click the power button and restart the laptop. Even unplugging the USB radio will not resume the screen.

Whats odd, is that it seems that the blanks only occur with a certain distance the radios get. So, the further away they are, the less chance there is of a black screen.

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SJ6 Legend For PIxhawk Autopilot Camera Triggered

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@banjing wrote:

Hi, i would like to ask some help please on how to trigger my SJ6 Legend Camera on Autopilot Filght (Mission flight). And how to trigger the camera manually also, using Radio Transmitter.
I am using this cable for my camera:
https://sjcam.com/product/fpv-remote-shutter-cable-for-sj6-legend-sj7-star-native-4k-action-camera/

I already tried setting the Camera gimbal setting on MP but the trigger wont work when i switch CH7: I connected the PWM on the AUX pin on pixhawk on AUX2 (SERVO10):

Already set CH7 to camera_trigger also:

What am i missing? The manual trigger wont work when i tested it, I cant go on to triggering on autopilot if i cant make it work on manual trigger using CH7:

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When trying to build qgroundcontrol.pro in qt creator iam getting an error

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@SAI_RAGHAVENDRA_MUPP wrote:

14:14:31: Running steps for project qgroundcontrol…

14:14:31: Configuration unchanged, skipping qmake step.

14:14:31: Starting: “C:\Qt\Qt5.11.3\Tools\QtCreator\bin\jom.exe”

C:\Qt\Qt5.11.3\Tools\QtCreator\bin\jom.exe -f Makefile.Debug

link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /SUBSYSTEM:CONSOLE “/MANIFESTDEPENDENCY:type=‘win32’ name=‘Microsoft.Windows.Common-Controls’ version=‘6.0.0.0’ publicKeyToken=‘6595b64144ccf1df’ language=’’ processorArchitecture=’’” /VERSION:0.0 /MANIFEST:embed /OUT:debug\QGroundControl.exe @C:\Users\VAMSHI~1\AppData\Local\Temp\QGroundControl.exe.876.3360.jom

LINK : fatal error LNK1104: cannot open file ‘z.lib’

jom: C:\build-qgroundcontrol-Desktop_Qt_5_11_3_MSVC2015_32bit-Debug\Makefile.Debug [debug\QGroundControl.exe] Error 1104

jom: C:\build-qgroundcontrol-Desktop_Qt_5_11_3_MSVC2015_32bit-Debug\Makefile [debug] Error 2

14:14:37: The process “C:\Qt\Qt5.11.3\Tools\QtCreator\bin\jom.exe” exited with code 2.

Error while building/deploying project qgroundcontrol (kit: Desktop Qt 5.11.3 MSVC2015 32bit)

When executing step “Make”

14:14:37: Elapsed time: 00:06.

please help me with this

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High altitude security inspection

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@yourk wrote:

Today, I bring a fixed-wing uav for a security inspection test. It carries a 40-fold hd zoom camera. Let’s see the test results.Personally, I am quite satisfied with this test, what do you think?

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I'm trying to use pymavlink command statustext_send to display on Mission Planner

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@Sambiswas wrote:

  Code I'm using,

master.mav.statustext_send(mavutil.mavlink.MAV_SEVERITY_CRITICAL,msg)

nothing happens though.

What am I doing wrong?

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