Gimbal Servo Control Using Rotational Resistance for Shake Correction
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Solution Overview
Problem
Existing gimbal systems struggle to completely offset camera shake due to inaccuracies in gyro sensors and servo motor performance, necessitating improved management of camera shake correction performance.
Innovation Solution
A method and apparatus that utilize a control module to generate and apply target rotational forces to a servo motor based on gyro sensor inputs and preset angular velocities, incorporating a linear model with an inverse function to account for inertial momentum and rotational resistance, enabling a camera shake correction performance test mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gyro sensor and servo motor are used to offset gimbal platform rotation, then camera shake reduction is achieved, but complete offset cannot be realized due to sensor precision and motor performance limitations
Solution Approach 1:
The patent implements a feedback control mechanism where the gyro sensor continuously measures the actual angular velocity of the gimbal platform, and the control module compares this measured value with the target angular velocity. Based on the deviation detected, the system adjusts the servo motor's rotational force in real-time to minimize the error, thereby improving camera shake correction performance despite sensor precision limitations.
Solution Approach 2:
The patent replaces complex mechanical simulation structures with a computational approach. Instead of using physical mechanisms to generate rotational resistance, the system calculates the required resistance based on the inertial momentum of the gimbal and applies it through software control of the servo motor, simplifying the mechanical system while maintaining correction effectiveness.
2Reliability
If complex mechanical simulation structures are used to test camera shake correction performance, then accurate performance evaluation is achieved, but system complexity and cost increase
Solution Approach 1:
The patent replaces physical mechanical simulation structures with a virtual simulation implemented through software. The control module calculates rotational resistance based on the inertial momentum of the gimbal and preset angular velocity data, eliminating the need for complex physical test apparatus while maintaining the ability to evaluate camera shake correction performance accurately.
Solution Approach 2:
The patent creates a virtual model of the gimbal system's inertial characteristics through software calculation. By computing the rotational resistance based on preset inertial momentum values, the system replicates the effects that would otherwise require physical simulation structures, thereby simplifying the test setup while preserving evaluation accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances camera shake correction performance by quantifying and improving stabilization through precise control of gimbal movements, reducing costs associated with mechanical simulation structures.
Implementation Method 1
a gyro sensor for measuring an angular velocity may be mounted on the gimbal to be aligned with a gaze line, i.e., the direction the camera faces, thereby measuring the angular velocity (rotation speed and direction) of the gaze line
Implementation Method 2
drive a servo motor of a gimbal in an opposite direction to rotation caused by movement of a gimbal platform engaged with the gimbal, like a gimbal handle, a drone, etc.
Implementation Method 3
calculating the value of rotational resistance, based on an inertial momentum of the gimbal and the value of the preset angular velocity
Data Source
AI summary
Provided is a method of controlling a gimbal mounted on a camera, the method including, by a control module, generating a value of a first target rotational force for a servo motor module that transmits a rotational force to the gimbal, based on a value of a sensor output received from a gyro sensor module mounted to be aligned in a direction in which the camera faces and a value of a preset angular velocity of a gimbal platform with which the gimbal is engaged, and, by the control module, applying a value of rotational resistance based on the value of the preset angular velocity of the gimbal platform to the value of the first target rotational force to generate a value of a second target rotational force, and transmitting the value of the second target rotational force to the servo motor module.