Thanks for your comments @B3Guy and @neededandwanted - you both make a lot of sense.
Hey here is an interesting thread about a DIY Movi project (not sure his goal is for flying or handheld): http://forum.freeflysystems.com/index.php?threads/converting-my-cs-gimbal-to-a-brushless-gimbal.1257/
It is really the angular stabilization that does the heavy lifting in keeping an image looking stable. A tiny motion of a portion of a degree is a visible change, especially with a longer lens. It is the uncontrolled angular turning of the camera that make the shooter look amateurish. It makes the footage look like it was shot handheld with a very lightweight camera. The linear movement does not look bad, and is much smaller on screen. If you are shooting something 20 feet away and lift the camera up an inch or so, it will be imperceptible. Ditto with moving the camera towards the subject by an inch or two. Any small truck, dolly, crane/elevate moves (made when the 3 rotational axis movements are controlled) are very minor, and even when visible tend to NOT be unpleasing to look at. As a side benefit in the CMOS space, they also tend to not generate skew and jello.
No stabilizers really attempt to suppress the linear motions, especially the front/back and left/right motion. There is some smoothing out of up/down motion coming from a Steadicam arm, but it only stops fast motion and converts it to slower motion, in a sense.
I'm not at all familiar with this specific tech, but I've done robotics stuff before. The way that these copter stabilization gimbals are designed effectively allow them to correct/stabilize for pretty much any type of movement AFAIK (roll, pitch, yaw, and various planar shifts).
Honestly, the main attraction of the MOVi is that it can handle heavier/bigger cameras. Personally if I were to get a system (or make one) similar to the MOVi in function, I would certainly want it to handle a heavier setup, as I'm not a huge fan of sticking a GH2/NEX with a little pancake lens on the thing and running around.
Motors are the key to these systems. You need exactly the right ones in order for them to be strong, quiet, extremely accurate and fast (the last two things especially, because if they are not fast and accurate, they will just move jerkily or wobble as they try to catch up).
So anyone know how to make the following accelerometers control brushless motors?
Maybe with this? http://www.futureelectronics.com/en/technologies/development-tools/analog-power/Pages/3344215-RD3803MMA7660FC.aspx?IM=0
I see that flight stabilization requires a focus on eliminating pitch, yaw, and roll.
http://www5.epsondevice.com/en/sensing_device/gyroportal/about.html
http://www.futureelectronics.com/en/Search.aspx?dsNav=Ny:True,Nea:True,N:645
Consider the following alternative idea: for handheld camera movements I'm not rolling to the right or left suddenly like in flight (roll). Also, sometimes I want to pitch up or down (pitch, i.e. tilt). I admit, smoothly panning handheld (i.e. yaw) is difficult to do without some kind of stabilization (maybe a shoulder rig is sufficient). Overall, with handheld camera movements micro jitter is the most distracting feature I want to eliminate (not pitch, yaw, or roll).
So I'm thinking, instead of counter-rotating the camera to neutralize pitch, yaw, or roll - what if the camera was only stabilized linearly on the x and z axis (left to ride and up to down)? The goal would be small linear adjustments, with each axis controlled by a rack gear attached to a brushless motor reading a linear motion sensor?
Thoughts on this? In your opinion, would pitch and yaw be necessary to stabilize too?
Imagine a small, quiet version of this linear brushless motor, but on x and y axis for camera stabilization:
http://au.answers.yahoo.com/question/index?qid=20080319082534AAtrClv http://wiki.answers.com/Q/How_to_convert_Angular_velocity_to_velocity
Info on G force http://www.gforces.net/a-discussion-on-typical-examples.html
Accelerometers for sale, organized by 1, 2 or 3 axis capabilities, plus g force rating: http://www.futureelectronics.com/en/Search.aspx?dsNav=Ny:True,Nea:True,N:634
This post is reserved for possible solutions.
http://www.iso1200.com/2013/04/are-you-ready-for-diy-movi-2-axis.html?m=1
From that article, as an example of 2 axis (pitch and yaw) stabilization... kinda slow response:
http://www.simplebgc.com/eng/downloads/
This post is reserved for examples of tech used in multicopters.
http://www.personal-view.com/talks/discussion/256/quad-and-hexa-copters/p1
This post is reserved for examples of more expensive solutions.
FreeFly MOVi http://www.personal-view.com/talks/discussion/6607/freefly-movi-very-expensive-handheld-stabilized-system-/p1
ZenMuse
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