Gender
Male
About
Location
Adelaide, SA
About Me:
Elec. Eng.
Please tell us a bit about your UAV interest
www.millswoodeng.com.au
Hometown:
Adelaide, South Australia
Activity Feed
"Agree with Rob wholeheartedly. The wording could have been chosen with a little more care."
"There is already a 30 Amp switching power supply in this device, I can't see that another 1 or 2 Amp switcher would constitute much of a problem from an emissions point of view. But perhaps the designer was more concerned about conducted noise on…"
"Great discussion Matt! Thanks for posting. Sorry I do not have anything intelligent to add other than to say how enjoyable and educational it is to read a technical discussion.
Cheers,Andrew."
Cheers,Andrew."
"Thank you. The command that is sent to the air vehicle is entered in a user field in the configuration software and stored in the flight termination device, so all of these possibilities are, er, possible. Just wanted to know whether I had to…"
"Perfect, thanks Bill and Kevin.
Regarding monitoring of the telemetry uplink, I think the MAVLink uplink heartbeat should work fine, as long as it is sent often enough.
The hardware will not have authority over PWM or PPM entering the autopilot, so…"
Regarding monitoring of the telemetry uplink, I think the MAVLink uplink heartbeat should work fine, as long as it is sent often enough.
The hardware will not have authority over PWM or PPM entering the autopilot, so…"
"Hi Bill,
Sorry I should have introduced myself - I run Millswood Engineering. Kevin contacted me a while back regarding flight safety matters and has been instrumental in encouraging and shaping a redesign of the current Failsafe board to be…"
Sorry I should have introduced myself - I run Millswood Engineering. Kevin contacted me a while back regarding flight safety matters and has been instrumental in encouraging and shaping a redesign of the current Failsafe board to be…"
"Thanks Bill and Drone Savant for the added detail.
In fact the device that will be listening to the uplink and potentially sending a RTL command will be an update of this device.
I am not planning on monitoring the downlink, so any heartbeat must be…"
In fact the device that will be listening to the uplink and potentially sending a RTL command will be an update of this device.
I am not planning on monitoring the downlink, so any heartbeat must be…"
"Ah, thanks Bill.
I will try to read more of the MAVLink documentation."
I will try to read more of the MAVLink documentation."
"Thank you Bill,
Yes, they were rather specific questions.
If there is no retry protocol, it is reasonable to assume that the autopilot must obey commands regardless of sequence number.
Cheers,Andrew"
Yes, they were rather specific questions.
If there is no retry protocol, it is reasonable to assume that the autopilot must obey commands regardless of sequence number.
Cheers,Andrew"
"Looks like it was a vain hope.I guess once a question slips off the front page it is destined for eternal obscurity.
Sigh."
Sigh."
Hi all,I am hoping someone might be able to help me understand the MAVLink and UAVTalk protocols a bit better, specifically with regard to implementing flight termination more gracefully than simply crashing. My questions relate to the uplink…
"I would like to add that CAN implemented on an AVR is not too bad - I've implemented two different CAN protocols on an AVR and it was fine (neither was CANaerospace unfortunately). The only caveat is that you absolutely must choose an AVR that has…"
"Re connectors: I agree that smaller connectors are highly desirable for small aircraft. CAN architecture means that systems are vulnerable to connector failure - even a single connector failure will take out the bus, or part thereof - so I don't…"
"Try this instead:
http://www.abc.net.au/foreign/content/2012/s3582815.htm"
http://www.abc.net.au/foreign/content/2012/s3582815.htm"
"Hi Bill,
I am puzzled at how you implement closed loop speed control at 1kHz. How do you obtain a new estimate of angular velocity to calculate the error term at this rate? At 200rpm (for example), there are only 20 zero crossings per second,…"
I am puzzled at how you implement closed loop speed control at 1kHz. How do you obtain a new estimate of angular velocity to calculate the error term at this rate? At 200rpm (for example), there are only 20 zero crossings per second,…"
