Single-Track Vehicle Positioning via Inclined Yaw Rate
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Solution Overview
Problem
Existing methods for determining a vehicle's position, such as satellite-based GPS, are inadequate for single-track vehicles navigating through curves due to limitations in measuring inclined orientation-dependent yaw rates, which prevents effective dead reckoning.
Innovation Solution
A method and device that measure the inclined orientation and speed of single-track vehicles using sensors like wheel rotation and gyrometers to calculate the vehicle path yaw rate, enabling navigation even during GPS signal failures by employing a modified dead-reckoning algorithm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite-based positioning system (GPS) is used to determine vehicle position, then position determination accuracy is improved, but reliability deteriorates in situations where satellite communication is limited or unavailable (tunnels, deep road cuttings, parking garages)
Solution Approach 1:
The system performs preliminary actions by determining the vehicle's position and orientation using sensors (gyroscopes, accelerometers, wheel speed sensors) before GPS signal loss occurs. This preliminary dead reckoning data is then used to maintain position estimation during GPS outages, ensuring continuous navigation capability.
Solution Approach 2:
The patent introduces an intermediary dead reckoning calculation system that bridges GPS availability gaps. This intermediary system uses sensor data to estimate position changes and compensates for the lack of direct GPS measurements during tunnel passages or signal blockages, maintaining overall system reliability.
2Device complexity
If standard dead reckoning algorithms from private car sector are used for single-track vehicles, then device complexity is reduced, but measurement precision deteriorates due to inclined orientation-dependent yaw rate measurement issues
Solution Approach 1:
The patent applies local quality by adapting the dead reckoning algorithm specifically for single-track vehicle characteristics. Instead of using a generic algorithm, the system incorporates local modifications to account for the vehicle's inclined orientation during cornering, using orientation sensors to compensate for the yaw rate measurement errors that occur on banked tracks.
Solution Approach 2:
The system changes parameters by transforming the measured inclined yaw rate into a corrected horizontal yaw rate using orientation data from gyroscopes and accelerometers. This parameter transformation compensates for the effects of track banking and vehicle inclination, maintaining measurement precision without requiring completely new sensors or algorithms.
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
Enables reliable navigation and emergency call functionality for single-track vehicles by accurately determining their position through vehicle path yaw rate calculations, even in conditions where GPS is unavailable.
Implementation Method 1
a yaw rate sensor, such as a gyrometer can be used for example
Implementation Method 2
The speed of the single-track vehicle can, for example, be measured by way of a wheel rotation sensor
Implementation Method 3
a device for determining an inclined orientation angle can be used, for example
Data Source
AI summary
A method is described for determining a position of a two-wheeled vehicle. The single-track vehicle has a vehicle path yaw rate when driving along curves and a yaw rate according to the inclined orientation which differs from the vehicle path yaw rate. An inclined orientation of the single-track vehicle and a speed of the single-track vehicle are measured. The vehicle path yaw rate of the single-track vehicle is determined from the measured inclined orientation and the measured speed. A device for carrying out the method is also described.