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bizart

QUADROTOR UAV

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Hi!

We are working at complete UAV system. Currently we are focus on quadrotor scheme because of its mechanical simplicity. You can check http://quadrotor.atspace.org .You will find release candidate beta version of ours custom developed telemetry monitoring and configuration software. We will be glad to have some feedback and ideas to include. As soon as there is stable version of software we will make available complete communication protocol.

Regards!

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Hi all,

We have accomplished successfully inertial stabilization tests. Ground Station v1.1 is coming up. Currently we are preparing new hardware for both frame and electronics. Probably we will go on brushless gearless. Look forward for new videos showing remarkable autonomous hover capabilities of the helicopter. Now we are testing on smaller frame, but still interesting to see. The big one is down after battery fail. Here is communication protocol for those interested of using our Ground Station software for own purposes.

Communication protocol v.1.1

Two-way communication protocol is based on simple ten to eight bits conversion. Leading character indicates configuration or command/status data followed by 40 bits [grouped as 5 (8-bit) bytes representing 4 (10-bit) bytes], followed by checksum byte (8bit), CR, LF for uplink. Downlink is slightly larger bringing a more complex data for debug. Its length is fixed this time at 14 (8-bit) bytes. Starting with leading character indicating packet type followed by four floating-point variables internally multiplied by 1000, checksum byte and CR, LF.

Uplink command example:

|| X || Y || Z || THR ||

“/” (47) ||01234567|89||012345|6789||0123|456789||01|23456789|| CHK |

-----------------------------------------------------------------------------------------

1-st byte | 2-nd byte| 3-rd byte | 4-th byte| 5-th byte | 6-th byte | 7-th byte|

Downlink attitude status example:

| X.0 | X.1 | X.2 | X.3 | Y.0 | Y.1 |

“/” (47) |01234567|01234567|01234567|01234567|01234567|01234567|

-----------------------------------------------------------------------------------------

1-st byte | 2-nd byte| 3-rd byte | 4-th byte| 5-th byte | 6-th byte | 7-th byte|

Y.2 | Y.3 | Z.0 | Z.1 | Z.2 | Z.3 | CHK |

01234567|01234567|01234567|01234567|01234567|01234567|01234567|

-----------------------------------------------------------------------------------------

8-th byte | 9-th byte|10-th byte|11-th byte|12-th byte|13-th byte|14-th byte|

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Interesting !

What dose this design offer over a conventional helicopter ?

Terry

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Hi Terry!

We started working on quad rotor scheme mainly because of its mechanical simplicity. That is the main advantage over the classic helicopter design. Lighter props, lower rpm and generally more safety operation are some other benefits of this design. You do not have to do some complex mixing on your transmitter; everything is done by the electronics onboard. Quadrotors have also some remarkable hovering capabilities and good horizontal flight. Currently we are testing our system on conventional electric helicopter.

Regards!

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Hi Keith!

Current design weight is 1,8 kg and can lift 0,4-0,5 kg with no stability problems. We are working now on brushless system with hopefully at least 1kg payload.

Regards!

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hecko Bizart,

a question: when you will make the software available? I am very interested in it (even in an unstable version) for using in my own projects as I ever have looked for public/opensource software like that.

Best greets,

Marcus

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