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Details about  YUN-I Brushless Gimbal Complete KIT - GoPro - Gopro Hero 3

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YUN-I Brushless Gimbal Complete KIT - GoPro - Gopro Hero 3
Item Ended
Item condition:
05 Mar, 2013 06:32:14 GMT
£40.00 Royal Mail International Signed | See details
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Item location:
London, United Kingdom


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Last updated on  08 Feb, 2013 22:50:43 GMT  View all revisions
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Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition
Brand: YUN-I

YUN-I Brushless Gimbal Complete KIT

If you would like to order this gimbal and you do not want to pay full price or you would like to get better price please visit our online shop 

The best and the most stable camera gimbal on the market for gopro cameras and small compact cameras is coming. Do not be late and order it now. Please note that this auction is for pre order items. The gimbal is expected in first two weeks on march 2013.

The quality of the pictures taken or video made on this gimbal is equal with the legendary Dji Z15 but a lot cheaper and you also can use it on small copters like Dji F550 or F450 or any multirotor.

Main features:

1. high quality carbon fibre material with high accuracy aluminium part to ensure light weight and high intensity of gimbal structure

2. Special high quality motors to ensure best performance of the ZUN-I gimbal

3. adjustable structure allows gimbal to adapt to different cameras (under 200 g of weight) with an extraordinary results

4. high quality embeded controller enables perfect operation under different environmental conditions

5. Simple and intuitive software for adjusting parameters and firmware upgrades

In fact, gimbal based on BLDC motors is very similar to regular gimbal based on hobby servo. The main difference - each axis of rotation passes through the center of gravity (CG) of the "Camera + frame" system and rigidly connected to the BLDC motor. The absence of gear - a fundamental point that lets you use the inertia of the system is not to harm, but for good. In case of ideal balance of the camera, the rotor rotates freely without resistance and even without need of applying extra control force, which allows the camera to unleash from the disturbance from UAV frame. In addition, there is no backlash inherent gears or belts.
BLDC motor works not in its usual mode, but as an DC-electromagnet generating high torque to hold camera. Therefore it is NECESSARY to rewind motor with thinner wire to increase its resistance and torque. Recommendations for winding motors of different sizes are collected in section Electronic / Motors.

To control the motors, a special controller was designed. It receives information from gyroscopes and accelerometers mounted on the camera platform. A standard IMU algorithm is used to define camera inclination angles. With the remote control, operator sets desired tilt angle. PID-controller calculates the amount of compensation and send command to the power unit, which controls the current in the windings and thus the direction of the vector of magnetic field in the stator. Magnetic field moves the rotor to the right position.

Due to using IMU, mechanical part of the system is a very simple. There is no need in complex and expensive high-definition encoders for each axis. Just mount tiny IMU board on the camera platform, connect wires to controller and motors and all done!
It will give impressive quality of stabilization compared to regular servos.

Basic requirements for the mechanical design of gimbal frame:
The possibility of precise balancing on three axes. The better the balance, the lower the current need for stabilization.
Mechanical rigidity of bearing elements to prevent resonances from working propellers in flight
Minimizing friction in the joints. The better the gimbal axis are unleashed from UAV camera platform, the less effort is required from the engine to stabilize
Elimination of vibrations from the main UAV frame. The vibrations have a negative impact on the quality of the video. But another negative effect in this system is that vibration will lead to self-excitation of the closed-loop controller.

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