Gyroscopic System Angle Measurement Error Correction
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Solution Overview
Problem
Vibrating gyroscopes face precision degradation due to measurement errors that vary with vibration position, especially in closed-loop operations, where rotational speed measurements are affected by uncertainties in transformation commands, leading to inconsistent angle measurements.
Innovation Solution
A method involving a gyroscopic system with multiple vibrating gyroscopes that adapt zero references to provide consistent angle measurements by alternating measurements between different vibration positions, allowing for error averaging and continuous angle measurement during position changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If closed-loop operation is used to maintain vibration position, then operational stability is improved, but measurement precision deteriorates due to transformation uncertainties
Solution Approach 1:
The patent divides the measurement system into multiple independent vibrating gyroscopes, each capable of operating in open-loop mode with high precision. By segmenting the system into multiple units rather than relying on a single closed-loop system, the patent preserves measurement precision while achieving operational stability through redundancy and alternation between units.
Solution Approach 2:
The patent implements periodic alternation between multiple vibrating gyroscopes, switching between them at regular intervals. This periodic action allows each gyroscope to operate in its precise open-loop mode for measurement while the system as a whole achieves stability through the coordinated operation and alternation of multiple units.
2Measurement precision
If vibration position is changed to average errors, then measurement accuracy is improved, but measurement continuity deteriorates during position transitions
Solution Approach 1:
The patent segments the measurement function across multiple vibrating gyroscopes, allowing one gyroscope to be repositioned while another continues providing continuous measurements. This segmentation ensures that measurement continuity is maintained during position transitions by having backup units ready to take over.
Solution Approach 2:
The patent uses additional vibrating gyroscopes as intermediary measurement sources during position transitions. When one gyroscope is changing position, another gyroscope acts as an intermediary to provide continuous measurement coverage, ensuring no gap in the measurement stream occurs during the transition period.
3Duration of action of moving object
If multiple vibrating gyroscopes are used to maintain continuous measurement, then measurement continuity is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple vibrating gyroscopes into a unified measurement system where they operate in coordination. By combining their capabilities and using them in parallel with systematic alternation, the patent achieves continuous measurement while managing complexity through integrated control and data fusion of the multiple units.
Solution Approach 2:
The patent designs the vibrating gyroscopes to be universal and interchangeable units that can perform the same measurement function. This multi-functionality allows any gyroscope in the system to take over any measurement role, simplifying the overall system architecture despite having multiple units, as they all serve the same purpose and can be used interchangeably.
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
This approach ensures consistent and accurate angle measurements across different vibration positions, reducing measurement errors and maintaining precision during vibration position changes, unlike prior art which degrades to rotational speed measurements.
Implementation Method 1
Gyroscopes of the axisymmetric Coriolis Vibratory Gyroscopes (CVG) type, for example of the Hemispherical Resonance Gyroscopes (HRG or GRH) type or more generally referred to as type I
Data Source
Figure 1~2
Figure 3
AI summary
In a gyroscopic system comprising at least one vibrating gyroscope, first angle measurement means, designed to deliver a first measurement of angle values along a measurement axis, and a second angle measurement means, designed to deliver a second measurement of angle values along said measurement axis, first angle values are delivered by the first angle measurement means vibrating in a current vibration position and, at the same time, second angle values are delivered by the second angle measurement means. Deduced therefrom are second angle values corrected on the basis of a comparison between the first and second angle values. Next, the vibration position of the first angle measurement means from the current position to another vibration position is changed. Thereafter, first angle values are delivered by the first angle measurement means and, at the same time, second angle values are delivered by the second angle measurement means, and deduced therefrom are first angle values corrected on the basis of a comparison between the first and second angle values.