Launch Control

[jbalat]

Guys every time I think of something I find that its already been done.

Just thinking of incorporating some kind of launch control on the more powerful bikes that tend to flip over whenever you let someone else ride it. Well thats the right reason...

The real reason is I want to be able to hold a mono for ever

I can see issues that if you tried to ride up a hill the motor may cut out, or if you rotate uo too fast the inertia my flip the bike unless you could also control braking/e-brake ?

 

[cal3thousand]

Guys every time I think of something I find that its already been done.

Just thinking of incorporating some kind of launch control on the more powerful bikes that tend to flip over whenever you let someone else ride it. Well thats the right reason...

The real reason is I want to be able to hold a mono for ever

I can see issues that if you tried to ride up a hill the motor may cut out, or if you rotate uo too fast the inertia my flip the bike unless you could also control braking/e-brake ?

Computer (arduino?) controlled launch would be cool. Especially if you could include gyroscopic tilt sensors to limit the angle. That way a simply WOT pull and lean will get you on 1 wheel and keep you there.

 

[jbalat]

I was thinking a multiwii board with accelerometers and gyros. This one is only $19 and with a little bit of programming skill you could modify the arduino multiwii code to control the throttle

http://www.hobbyking.com/hobbyking/store/__22322__MultiWii_NanoWii_ATmega32U4_Micro_Flight_Controller_USB_GYRO_ACC.html

Btw my brushless gimbal has an imu board which sits on the camera to keep it level no matter what attitude the tricopter is flying at. You can program a pitch angle which will rotate the camera to that angle at a press of a button, at the same time the pitch is still active to keep the camera at that angle. This could perhaps be the angle you want your bike achieve, and maybe allow the user to dial in the required angle on a pot even if the angle is zero..

Btw it's not that easy to hold a mono, even if the throttle could hold the right angle I would probably fall over to the side

Check out my video of the imu in action, fast forward to 1:17 if you want to see my bike and my mate falling off
[youtube]cyuGvBETMFY[/youtube]

 

[Punx0r]

Is the throttle response on your average speed controller fast enough to permit this idea?

 

[cal3thousand]

Is the throttle response on your average speed controller fast enough to permit this idea?

Probably not the average. But I don't think this would be for bikes with average components to begin with.

 

[fechter]

If you used something like the Segway, it should be possible to ride a wheelie for long distances.

 

[Tench]

The Audi ebike has this feature of controlled wheelie, if it was easy to add to an ebike I would defo add it to mine!! a small motor to the front wheel would make long mono's much easier, the gyroscopic forces help you steer and maintain side balance.

I have cleared the mile a few times on the back wheel, the R1 would sit on its back wheel nice and steady at 141mph!! I liked the gearbox driven speedo! but my KTM duke or XR600 where easier for long distance! But that was then and I don't feel my reactions are quick enough now, the secret of reaching old age is knowing when to stop doing some things!

 

[Punx0r]

I saw this earlier today and thought of this thread

 

[cal3thousand]

I saw this earlier today and thought of this thread

Now that's riding it like you stole it

 

[jbalat]

Woohoo, I would love to be able to do that !
I've been practicing in the park but its a lot harder than it looks.
My motivation is I would love to make a video like project LMX using Quadcopters for filming

 

[cal3thousand]

Woohoo, I would love to be able to do that !
I've been practicing in the park but its a lot harder than it looks.
My motivation is I would love to make a video like project LMX using Quadcopters for filming

Good idea.... can quadcopters follow targets automatically yet?

 

[ronnbot]

Cycle Analyst V3 can do this though I haven't used it yet. I suppose I should start using it as it both safer and makes it easier on components.

I really like this feature on my RC speed controllers (punch control and start power):

 

[zombiess]

I've done some launch control work in my throttle tamer but abandoned it since I didn't have the space for an accelerometer. I had it setup so you could set the initial throttle set point when letting off the ebrake button with the throttle pinned. Then after a time delay it would just go WOT. It worked OK but I decided to leave it out of the production version. I've been thinking about using an accelerometer to do the work, but the typical ebike controller can be pretty tricky to control since it's speed based, that's one of the biggest challenges to overcome, predictable and repeatable throttle ramp rates.

 

[jbalat]

When you say it is speed based what do you mean. I have tried many times to do a wheelie, sometimes nothing happens and other times it wants to flip the bike over ?

@cal3thousand.. I know its possible, when I had the AR drone some guy developed his own code that allowed the drone to recognise a photo that you could upload, there was a video of the drone following a red ball. I can imagine in the not so distant future every football player would have their own drone filming them and following them around as they play.

At the moment I just fly fpv with some fat shark glasses looking through a small security cam while the gopro films in hd. I'm limited to about 1.5km range but a friend of mine has gone out to 15km with his rc plane without any issues.

 

[jbalat]

Until I get this thing up and running I may as well practice. This is a video my friend took on the weekend from his quadcopter using a custom designed gimbal. Lots of small wheelies but hope that practice makes perfect
[youtube]jOsnLlpTIEM[/youtube]