如何使用python dronekit实现“向左/向右/向前/向后”？

Question

我正在使用APM自动驾驶我的六角飞行器，并遵循this教程。通过查看this可用的命令，我无法理解如何命令无人机向左/向右/向前/向后移动？

有人能帮我解决这个问题吗？

Answer 1

您需要创建一个vehicle.message_factory.set_position_target_local_ned_encode.它将需要一个mavutil.mavlink.MAV_FRAME_BODY_NED框架。您可以将所需的x、y和/或z速度(以m/s为单位)添加到消息中。

from pymavlink import mavutil
from dronekit import connect, VehicleMode, LocationGlobalRelative
import time

def send_body_ned_velocity(velocity_x, velocity_y, velocity_z, duration=0):
    msg = vehicle.message_factory.set_position_target_local_ned_encode(
        0,       # time_boot_ms (not used)
        0, 0,    # target system, target component
        mavutil.mavlink.MAV_FRAME_BODY_NED, # frame Needs to be MAV_FRAME_BODY_NED for forward/back left/right control.
        0b0000111111000111, # type_mask
        0, 0, 0, # x, y, z positions (not used)
        velocity_x, velocity_y, velocity_z, # m/s
        0, 0, 0, # x, y, z acceleration
        0, 0)
    for x in range(0,duration):
        vehicle.send_mavlink(msg)
        time.sleep(1)

connection_string = 'tcp:192.168.1.2:5760' # Edit to suit your needs.
takeoff_alt = 10
vehicle = connect(connection_string, wait_ready=True)
while not vehicle.is_armable:
    time.sleep(1)
vehicle.mode = VehicleMode("GUIDED")
vehicle.armed = True
while not vehicle.armed:
    print('Waiting for arming...')
    time.sleep(1)
vehicle.simple_takeoff(takeoff_alt) # Take off to target altitude
while True:
    print('Altitude: %d' %  self.vehicle.location.global_relative_frame.alt)
    if vehicle.location.global_relative_frame.alt >= takeoff_alt * 0.95:
        print('REACHED TARGET ALTITUDE')
        break
    time.sleep(1)

# This is the command to move the copter 5 m/s forward for 10 sec.
velocity_x = 0
velocity_y = 5
velocity_z = 0
duration = 10
send_body_ned_velocity(velocity_x, velocity_y, velocity_z, duration)

# backwards at 5 m/s for 10 sec.
velocity_x = 0
velocity_y = -5
velocity_z = 0
duration = 10
send_body_ned_velocity(velocity_x, velocity_y, velocity_z, duration)

vehicle.mode = VehicleMode("LAND")

玩得开心，当然，在编程和飞行无人机时要遵守严格的安全守卫。手动模式覆盖是必须的！

Answer 2

Dronekit-python有非常重要的API来命令本地框架中的无人机。根据我的个人经验，我很难使用这些命令让我的无人机在局部遵循一个形状，例如一个正方形或一个圆形。另一种方法是使用FlytOS drone APIs。如果你看到这个示例python code on github，你可以看到命令无人机向左x米然后向前y米等等是多么容易。Jon的答案确实正确地展示了如何使用dronekit来实现你想要做的事情，但另一个初学者可能会被复杂的代码吓倒。

Answer 3

我也遇到过同样的问题，我希望这个链接能帮助你找到here这篇文章中的“通过指定车辆的速度组件进行控制”部分