Rider Characteristic Determination via Multi-Axis Vehicle State Analysis
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Solution Overview
Problem
Existing methods for determining rider characteristics in saddle riding type vehicles are inadequate as they primarily focus on steering angle, neglecting other directional influences, leading to inaccurate evaluation of control characteristics.
Innovation Solution
A rider characteristic determining method that includes a first vehicle state detector for yaw rate and yaw angle, a turning movement discriminating unit, a second vehicle state detector for roll rate, roll angle, pitch rate, and pitch angle, and a component separating unit to distinguish high-frequency and low-frequency components, allowing for accurate calculation of vehicle stability and turning performance scores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If steering angle is used as the sole parameter for rider characteristic determination, then the evaluation method is simple, but the accuracy of control characteristic evaluation deteriorates because other directional influences are neglected
Solution Approach 1:
The patent segments the vehicle state detection into multiple independent components: yaw rate detection, roll rate detection, pitch rate detection, and caster angle detection. Each detector captures a specific aspect of vehicle behavior, and their combined analysis provides comprehensive rider characteristic evaluation without relying solely on steering angle.
Solution Approach 2:
The patent transitions from single-dimensional steering angle measurement to multi-dimensional vehicle state analysis by incorporating angular velocity components (yaw rate, roll rate, pitch rate) and angular position (caster angle). This dimensional expansion enables accurate evaluation of control characteristics while accounting for all directional influences on vehicle behavior.
2Measurement precision
If multiple vehicle state parameters are detected and analyzed, then the accuracy of rider characteristic determination improves, but the device complexity and measurement difficulty increase
Solution Approach 1:
The patent employs a multi-functional detection system where sensors capture multiple vehicle state parameters simultaneously. The same detection infrastructure monitors yaw rate, roll rate, pitch rate, and caster angle, enabling comprehensive analysis without requiring separate dedicated systems for each parameter, thus managing complexity while improving precision.
Solution Approach 2:
The patent introduces an intermediary analysis layer that processes multiple sensor inputs and synthesizes rider characteristic information. This intermediary processing stage integrates data from various detectors, applies appropriate weighting and filtering, and produces unified characteristic determination, simplifying the complexity of direct multi-parameter analysis.
3Ease of operation
If steering angle variations are analyzed without considering other rotational influences, then the analysis process is straightforward, but the reliability of rider characteristic evaluation deteriorates
Solution Approach 1:
The patent merges the analysis of steering angle variations with other rotational influences by integrating data from yaw rate, roll rate, pitch rate, and caster angle detectors. This combined analysis approach maintains operational simplicity through unified processing while significantly improving evaluation reliability by accounting for all relevant rotational factors that affect vehicle behavior.
Data Source
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AI summary
A rider characteristic determining method capable of determining characteristics of a rider controlling a saddle riding type vehicle, and a saddle riding type vehicle including the same, are provided. The rider's characteristics are determined based on a turning movement of the saddle riding type vehicle that reflects results of the rider controlling the saddle riding type vehicle. This enables a stable characteristic determination regardless of individual operation or control by the rider. Further, a turning performance score of the vehicle is calculated based on at least one of vehicle state amounts of a roll direction, a pitch direction and a caster angle which influence the steering angle of the saddle riding type vehicle. This enables a proper evaluation of the turning characteristic of the saddle riding type vehicle.