Direct-Drive Stabilizing Platform for Fast Imaging Posture Control
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Solution Overview
Problem
Existing stabilizing platforms for payload devices, such as imaging devices, face challenges in providing quick and dynamic posture adjustments due to delayed mechanical gear drives, leading to poor image quality from vibrations and shakes during carrier movement.
Innovation Solution
A stabilizing platform with a frame assembly, a controller assembly, and a motor assembly that includes inertial sensors to detect state information and generate motor signals for direct drive rotation around pitch, roll, and yaw axes, using direct-drive motors for rapid response and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If mechanical gear drives are used for reverse compensation, then the stabilizing platform can provide posture adjustment, but the response time is delayed and the adjustment speed is slow
Solution Approach 1:
The patent replaces the traditional mechanical gear drive system with a direct-drive motor system. The motor assembly includes multiple direct-drive motors that directly rotate the frame members without mechanical gear intermediaries, eliminating the delayed response and long adjustment time inherent in mechanical gear drives. This substitution enables rapid and dynamic posture adjustments to counteract carrier movements.
2Reliability
If mechanical gear drives are used, then posture adjustment is possible, but the image quality deteriorates due to vibration and shake
Solution Approach 1:
The direct-drive motor system eliminates mechanical gears that cause vibration and shake during operation. By directly coupling the motors to the frame members, the system reduces mechanical vibrations and shakes that would otherwise be transmitted to the imaging device, thereby improving image quality and reducing harmful vibrations.
Solution Approach 2:
The controller assembly receives real-time posture information from sensors and generates motor signals to actively counteract detected posture changes. This feedback mechanism enables the system to dynamically compensate for vibrations and shakes, maintaining stable imaging conditions despite carrier movements.
3Loss of time
If direct-drive motors are used, then response time is reduced, but the device complexity increases
Solution Approach 1:
The motor assembly is segmented into multiple independent direct-drive motors, each responsible for driving a specific frame member along a particular axis. This segmentation allows for modular design and control, where each motor can be independently controlled by the controller assembly, simplifying the overall system architecture while achieving rapid response times.
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
The solution enables rapid and precise adjustments of the payload device's posture, reducing vibrations and shakes, thereby enhancing image quality and stability, with reduced energy consumption and faster response times compared to mechanical gear drives.
Implementation Method 1
a measurement member configured to obtain state information with respect to at least a pitch, roll, and yaw axes of the device, the roll axis intersecting with the device... The measurement member can include one or more inertial sensors. The state information can include at least an angular velocity of the device.
Implementation Method 2
a motor assembly configured to directly drive the frame assembly in response to the one or more motor signals so as to allow the device to rotate around at least one of the pitch, roll or yaw axes. The motor assembly can comprise a first motor configured to directly drive the first frame member to rotate around the pitch axis
Data Source
AI summary
A stabilizing device includes a frame assembly configured to hold an imaging device and a motor assembly configured to directly drive the frame assembly to allow the imaging device to rotate. The frame assembly includes a first, a second, and a third frame member. The imaging device is configured to be coupled to the first frame member. The first frame member is rotatably coupled to the second frame member about a first rotational axis. The second frame member is rotatably coupled to the third frame member about a second rotational axis not orthogonal to the first rotational axis. The motor assembly includes a first motor configured to directly drive the first frame member to rotate around the first rotational axis and a second motor configured to directly drive the second frame member to rotate around the second rotational axis.