Questions tagged [uav]

Unmanned aerial vehicle. See also the tags ugv & auv.

10 questions with no upvoted or accepted answers
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Battery weight in quadcopter

We all know that the fly time of a quadcopter is proportional to its weight (and the propellers size, etc), and a high capacity battery is heavy, but also a high capacity battery would make the fly ...
2
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0answers
16 views

Checking for external compass in mission planner

How can I check whether the external compass is really selected for my APM 2.8 using mission planner. The primary purpose of using the external compass is to have less electro magnetic interference ...
2
votes
0answers
34 views

How to identificate uav's roll and pitch model and control to track object?

I'm building a drone distance controller for parrot mambo. I need to track a colored page with given distance and given heigth. I can get the yaw information from parrot mambo with 0.5 sec. Since I ...
2
votes
0answers
89 views

Position-Attitude Kalman filter with Quaternions

I want to design an EKF to estimate the position of a UAV. If I were doing this with Euler angles then I would have a state vector that would look like \begin{bmatrix}north&east&down&...
1
vote
1answer
107 views

How is the IMU used in the PixHawk?

Looking at 3DR's Pixhawk hardware on GitHub the FMU and IMU are treated as different pieces of hardware. On the schematics for the FMUs (example) there is limited reference to the IMU. So, is the IMU ...
0
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0answers
36 views

Why do we connect pins 2 and 3 on APM to enable PPM

Why is it necessary to connect signal pins 2 and 3 via jumper on an APM2.8 board to enable PPM. I am using flysky fs-ia6b receiver with the APM mentioned above. Pins 2 and 3 control pitch and ...
0
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0answers
9 views

Will disconnecting the external compass enable internal compass in APM

Will disconnecting the external compass from an APM 2.8 enable internal compass automatically, if the compass jumper is not disturbed while setting up the external compass, i.e. the external compass ...
0
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0answers
7 views

Data from Optitrack Motive is not getting streamed properly

i'm currently using optitrack motive 1.10.1 version for tracking 3 UAVs. i'm using vrpn streaming to stream the data. im connecting the host pc (on which motive is running) to router using lan and ...
0
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0answers
23 views

Best practices for quad-copter designing

What are the some of the best practices for placing the components (including battery, GPS, flight-controller, wires, receiver etc.) on the air-frame of an 'X' quad-copter to ensure the minimum power ...
0
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0answers
15 views

Calculation of quad-copter

Vector rotation around X-axis can be represented as: Rx = \begin{bmatrix}1&0&0\\0&cos(\alpha)&sin(\alpha)\\0&-sin(\alpha)&cos(\alpha)\end{bmatrix} Vector rotation around ...