I am getting vibration issue on my recent drone build i am not getting any solution.
When I accelerate my drone vibration is getting higher and even worse at time of breaking. I have tried some solutions
Changed my dampers but it doesn’t affected much.
Checked every wiring again lose at Pixhawk end and not free movement of any of those
Mounted flight controller without damper(this is better than with damper i don’t know how. Z axis vibrations are same nearly 30 but comparatively low on x and y axis at time of accelerating motion)
tried to lower values of INS_ACCEL_FILTER i guess it worked well but still facing issues of vibrations.
@Aayush if you have used ArduPilot Methodic Configurator, you can just post a .zip file with the contents of the vehicle configuration directory and @dkemxr will have all the answers to his questions. But then again, if you did, the accel filter would be already set correctly
Hi, I just took a look at the logs, IMU1 and IMU2 vibrations are quite high, but the vibration values on IMU3 seem to be acceptable IMHO, They average at 4m/s/s and all of them have a maximum below 30m/s/s, IMU3 is the only IMU not vibration isolated.
In my experience, most Pixhawk autopilots use vibration isolation that can actually amplify vibrations in large multicopters. There’s a version of the Cube Orange with minimal vibration isolation: The Cube Orange+ (IB)
Also, could you post a picture of the frame, and some information like the plate thickness, what motors you’re using, propeller size, tube diameter ( if you’re using tubes ), etc…
Maximum thrust per motor is 6.5 and we expect it to be max at 5 kg in flight accrodingley base plate thickness is 2.5mm and carbon fiber rods thickness is 2 mm
Hi, could you provide the outer diameter and inner diameter of the drone tube? as well as the distance between the anchor point and the motor center? I recommend using Drone Tubing Calculator to calculate the needed drone tube, here is a rough tutorial:
Enter the outer diameter, inner diameter ( If you have 30x28mm tube then the outer is 30 and inner is 28 )
Enter the length between the motor center and the arm mount
The website uses 2LB load as a default and is Unfortunately not changeable via the GUI, but you can open up Inspect Element → Console and type in ff = 11 ( 5kg = 11lb ) to get deflection values for your 5kg load.
Try to get deflection values to be under 1.5mm-1mm
Increasing the plate thickness to 3mm would also be nice but don’t think that’s too necessary, I personally have a hex copter that has the same thrust as this and uses 3mm plates with 30x26mm tubes. ( 400mm ), the max thrust per motor on my setup is 4kg, which gives me a deflection of about 1.26mm
Ah, 25x23mm is 1mm thickness all round, Taking a look at the image and assuming your props are 22.4 In, I assume the distance between the motor and the motor mount is roughly 12-13 in or about 330mm, using the calculator gives a max deflection of about 2.69mm, If you switch to a 30x28mm or 25x21mm you could reduce your deflection to 1.5mm, I’d recommend switching to 30x28mm as it has a better weight (37% lighter with same strength) but this would also require you to change your motor mounts.
If you have your ESC’s inside the tube make sure they fit the inner diameter that you’re going to change to.
