How can I control LAND speed?

MAVSDK
1

Hello,
I’m trying to Land using function “drone.action.land()”.
But it is too fast!
I would like to it slow but can’t find the commander as well.
Please let me know how can control land speed.

Thanks!!!

2

Isn’t this a PX4 param?

1 Like
3

Did you mean ‘drone.action.land()’ is px4’s param???
I don’t think so…
I’m using mavsdk’s python example script as belows,

#!/usr/bin/env python3

import asyncio
from mavsdk import System

async def run():

drone = System()
await drone.connect(system_address="udp://:14540")

status_text_task = asyncio.ensure_future(print_status_text(drone))

print("Waiting for drone to connect...")
async for state in drone.core.connection_state():
    if state.is_connected:
        print(f"-- Connected to drone!")
        break

print("Waiting for drone to have a global position estimate...")
async for health in drone.telemetry.health():
    if health.is_global_position_ok and health.is_home_position_ok:
        print("-- Global position estimate OK")
        break

print("-- Arming")
await drone.action.arm()

print("-- Taking off")
await drone.action.takeoff()

await asyncio.sleep(10)

**print("-- Landing")**

** await drone.action.land()** ## I’m asking about here!!! :grinning:

status_text_task.cancel()

async def print_status_text(drone):
try:
async for status_text in drone.telemetry.status_text():
print(f"Status: {status_text.type}: {status_text.text}")
except asyncio.CancelledError:
return

if name == “main”:
loop = asyncio.get_event_loop()
loop.run_until_complete(run())

4

Hello, @Cori_ander!
Parameter Reference | PX4 User Guide
There are two param - MPC_LAND_CRWL and MPC_LAND_SPEED.
For first param minimal speed is 0.3 m/s, for second - 0.6 m/s.
First param will work only if you have LIDAR. And set param MPC_LAND_ALT3.

But all this speed (0.3/0.6) is too fast for somes drone. My drone usually crashed when land with command.

1 Like
5

Sorry, Now I understand what you talking about.
Is it about QGC’s param?

6

Thank you for your answer!!!
I don’t have Lidar but now I understand what was going on.
I’m not sure but I’ll try to check about QGC’s param.
Am I thinking right??

7

@Cori_ander
:slight_smile:
Yes it is!
You can find and set it in QGC.
Also you can read and write this param with mavsdk.param..

http://mavsdk-python-docs.s3-website.eu-central-1.amazonaws.com/plugins/param.html

2 Likes
8

Thank you so much your answer! I will try soon! :smile:

1 Like