Shahid Banglawala
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Very sluggish alt hold on overpowered Octo

Started this discussion. Last reply by Shahid Banglawala Sep 13, 2013. 10 Replies

Hey guys and girls,I've followed DIY drones for a while and there's a ton of great info on here. Unfortunately I've run into a problem. I've got a very overpowered octo on Ardu 3.01 that needs…Continue

Tags: loiter, powered, slow, climb, descend

 

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Shahid Banglawala replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Thr Alt I was defo in and one of the first things I looked at. Also tried a big range of values. Made no difference at all bizzarely. It seems there are a range of values which can all effect climb rate. For future reference, toning down Thr Accel…"
Sep 13, 2013
Euan Ramsay replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"THR_ALT_I might also be missing or too low. Warning: too much I will cause bouncing. The desired maximum rate is 1m/s...does this seem about the right speed you're seeing?"
Sep 13, 2013

Developer
leonardthall replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Hey Shahid, Could you give us a log of one of your flights where you show the slow Alt_Hold? Sorry that the dev's missed your post! Thanks"
Sep 13, 2013
Shahid Banglawala replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Well in the end, with work coming in and not much time to sort Ardu I've resorted to using DJI WKM. It works a treat out of the box. Stock gains are fine for AP work, maybe a little tightening up but as usual I'm impressed. GPS etc all…"
Sep 13, 2013
Shahid Banglawala replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Hi Bernie I jacked all those up to at least 500 cm/s. Made no difference. Though I don't think I saw a THR_ALT_MAX just a P and D for THR_ALT. I'll have a closer look at that next time it's fired up. Gotta ask, why are there…"
Aug 10, 2013
Shahid Banglawala replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Toning down the throttle accel values helped the throttle. With so much excess power the default values were high. Off the top of my head the accel P is down to around 0.25, can't remember I. I tried that as I thought maybe the throttle…"
Aug 10, 2013
Bernie Hoffman replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"What values are you using for: PILOT_VELZ_MAX, THR_ALT__MAX, THR_RATE_IMAX, AND WPNAV_SPEED_UP? It sounds like one of these values is capping the max vertical speed at a lower level than you prefer."
Aug 10, 2013
Andy Horka replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Andy luck? Building a heavy lifter octo as well and wondering if a PX4 would be a good choice. Cheers, Andy"
Aug 10, 2013
Shahid Banglawala replied to Peter Bird's discussion LUASS / EuroUSC in the group UK Ardupilot Group
"Hi Peter,  No problem :) don't really have any tips apart from I used the template they emailed over quite extensively. It's very thorough so I only had to submit it once, it came back for minor grammar mistakes but that was it. I…"
Jul 31, 2013
Shahid Banglawala replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"Hey guys and girls, No one has any thoughts? Is alt hold supposed to work that way or should I expect more of a climb/descent rate? Thanks in advance!"
Jul 30, 2013
Shahid Banglawala replied to Peter Bird's discussion LUASS / EuroUSC in the group UK Ardupilot Group
"Hi there, I've got a BNUC and been through all the hoops. If you want to earn money from flying RC aircraft this is classified as Aerial Work and you need an approtiate license to do so. I've spoken to the CAA and the only one they…"
Jul 25, 2013
Shahid Banglawala replied to Shahid Banglawala's discussion Very sluggish alt hold on overpowered Octo
"I managed to grab some video so you guys have a better idea what this all looks like. Thanks very much in advance for your help and advice :)"
Jul 24, 2013
Shahid Banglawala posted a discussion

Very sluggish alt hold on overpowered Octo

Hey guys and girls,I've followed DIY drones for a while and there's a ton of great info on here. Unfortunately I've run into a problem. I've got a very overpowered octo on Ardu 3.01 that needs dialling in on Alt Hold and Loiter. I have the alt hold working well, it holds altitude nicely but when I want to climb or descend the rates are very slow, to almost nothing at all. I'm used to the alt hold on DJI WKM which basically felt like having manual control except it locked in the altitude better.…See More
Jul 24, 2013

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About Me:
Aerial cinematographer, travelling the UK and the World capturing images for film and TV
Please tell us a bit about your UAV interest
Degree in Aeronautical Engineering where I specialised in flight control and quadcopters. Aeromodeller of over 10 years with a big background in RC aerobatics.

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