Attitude Angle Derivation Using Intermediary Sensor
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Solution Overview
Problem
Existing attitude angle detection systems face challenges in achieving high accuracy due to cumulative errors from integrating angular velocity and susceptibility to high-frequency noise and drift.
Innovation Solution
The proposed attitude angle derivation device includes an acquisition part to obtain a rotation angle from an angle sensor, a storage to store the rotation angle and attitude angle, and a processor to update the attitude angle based on the temporal change of the rotation angle, thereby eliminating integration errors and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If angular velocity integration is used to detect attitude angle, then the attitude angle can be obtained, but cumulative errors and drift occur reducing measurement precision
Solution Approach 1:
The patent introduces an angle sensor as an intermediary device that directly measures the rotation angle without requiring integration of angular velocity. This mediator provides direct angle information that serves as a reference for correcting the attitude angle calculated from angular velocity integration, thereby eliminating cumulative errors and drift while maintaining the benefits of integration-based attitude detection.
2Measurement precision
If angular velocity integration is performed over time, then attitude angle can be derived, but high-frequency noise and drift contaminate the measurement
Solution Approach 1:
The angle sensor acts as a mediator that provides clean, direct angle measurements free from the high-frequency noise and drift that plague angular velocity integration. By using this intermediary measurement to correct or replace the integrated attitude angle, the system eliminates harmful noise and drift while maintaining accurate attitude information.
Solution Approach 2:
The patent replaces the mechanical integration process (which accumulates noise and drift) with a direct sensing approach using an angle sensor. This substitution eliminates the need for temporal integration and the associated harmful effects, providing a cleaner measurement path for attitude angle determination.
3Measurement precision
If temporal information and regular sampling are used in attitude detection, then integration can be performed, but the system becomes more complex and slower
Solution Approach 1:
The patent replaces the complex temporal integration system with a direct angle sensing system. By using an angle sensor that provides immediate angle information, the system eliminates the need for continuous sampling, temporal integration algorithms, and associated computational complexity, thereby simplifying the detection system while improving response speed.
Data Source
AI summary
According to one embodiment, an attitude angle derivation device includes an acquisition part, a storage, and a processor. The acquisition part is configured to acquire a rotation angle related to a first coordinate system. The rotation angle is obtained from an angle sensor located in an object. The storage is configured to store the rotation angle and an attitude angle. The attitude angle is related to a second coordinate system of the object. The processor is configured to acquire the rotation angle and the attitude angle, update the attitude angle based on a temporal change of the rotation angle derived from the rotation angle, and output the updated attitude angle.