Rotating Object Angle Calculation Error Compensation
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Solution Overview
Problem
Existing methods for determining the mechanical movement of an object rotating about an axis are limited by constant error parameters, which fail to accurately compensate for varying errors over a mechanical revolution, leading to inaccuracies in angular position calculation.
Innovation Solution
The method divides a mechanical period into electrical signal periods, individually determines and calculates error parameters for each period, forms compensation parameters through averaging, and weights these parameters based on the electrical angle, using sine and cosine signal equations to accurately account for amplitude, offset, and phase errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If constant error parameters are used for compensation, then the device complexity is reduced, but the measurement precision deteriorates due to inability to account for varying errors over mechanical revolution
Solution Approach 1:
The mechanical period is divided into multiple electrical signal periods, and error parameters are determined individually for each electrical signal period. This segmentation allows the system to capture varying errors at different positions during mechanical revolution, significantly improving measurement precision while managing complexity through systematic periodic processing
Solution Approach 2:
The system determines error parameters periodically for each electrical signal period within the mechanical period. By establishing a periodic evaluation routine that processes error parameters at regular intervals corresponding to electrical signal periods, the system achieves high measurement precision through consistent periodic compensation without requiring continuous complex processing
2Measurement precision
If error parameters are determined for each electrical signal period, then the measurement precision is improved, but the loss of time increases due to multiple calculations per mechanical period
Solution Approach 1:
Error parameters are determined in advance for each electrical signal period during a reference mechanical period. These pre-calculated error parameters are stored and then applied during subsequent operational periods, eliminating the need for real-time calculation during actual measurement and operation. This preliminary determination of error parameters achieves high measurement precision while minimizing time loss during actual use
Solution Approach 2:
The system dynamically adapts error parameters based on the specific electrical signal period being processed. By adjusting error parameters dynamically for each electrical signal period rather than using fixed constant values, the system achieves high measurement precision while optimizing calculation efficiency through period-specific parameter selection
Data Source
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Figure 2
Figure 3a~3b
AI summary
The invention relates to a method for ascertaining a movement of an object which rotates around an axis which cuts through the object and thereby assumes a mechanical angle θm, wherein at least one signal equation is used which describes the rotating movement, wherein at least one error parameter is defined for the at least one signal equation, wherein a mechanical period of the rotating movement is divided into p electrical signal periods (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16), wherein for each electrical signal period (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16) of the mechanical period, at least one value is individually determined for the at least one error parameter, wherein for each electrical signal period (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16), an average value is formed as a compensation parameter from the at least one value for the at least one error parameter.