by Emile Orzea
Aleksey Zaytsevsky is at it again, another breakthrough in the field of camera stabilization technologies.
Over the past year, video operators have been actively switching to controllable camera mounts directly connected to an electric motor. The result might seem satisfactory, but the overall quality of this solution tuned out to be questionable, since an electric motor without a gear box is inefficient at low RPMs.
An alternative solution demonstrated by Aleksey Zaytsevsky was simple and elegant: it only required the replacement of the position sensor in the servo drive with a force sensor. As the result, the servo drive rotates the camera resting on the unstable base, but the tilt of the unstable base makes no sense. This allows the operator to rotate cameras of any mass and use all the benefits of inertial stabilization, including the possibility to use a camera with an additional counterweight.
A few prototypes of the devices being designed have been presented so far. The video shows that the unwanted mechanical resistance of the servo drive can be so low that the arm can be rotated with a burnt out match. In a different experiment, the reduction servo drive rotates and stabilizes a 6 kg platform with the torque being as low as 3.8 kg/cm. The servo drive was also tested on an Ecilop Easy drone. For a more visual demonstration, an on-board camera with zooming was used.
Force Servo also allows for other usage scenarios. Thanks to Force Servo, the rudder turn angle is automatically limited at high speeds, preventing hypergravity. At low speeds, vehicles retain their maneuverability. It also prevents mechanical overloads in cases of rudder jamming.