Vehicle Body Roll Rate Plausibility Using Lateral Jerk
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Solution Overview
Problem
Current methods for monitoring the plausibility of yaw rates in vehicle dynamics control systems require redundant sensors or additional sensors, which are costly, and model-based approaches depend heavily on accurate modeling and parameter estimation, making them complex and labor-intensive.
Innovation Solution
A computer-implemented method that calculates plausible ranges for roll and pitch rates based on changes in lateral and longitudinal accelerations and their respective jerks, using linear dependencies defined by the Earth's acceleration, allowing for the determination of plausible values and generation of implausible signals when measured rates fall outside these ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant sensors or additional sensors are installed to monitor yaw rate plausibility, then measurement reliability is improved, but device cost and complexity increase
Solution Approach 1:
The patent uses lateral acceleration as an intermediary variable to indirectly verify yaw rate sensor plausibility. Instead of installing redundant yaw rate sensors, the system converts lateral acceleration measurements into an equivalent yaw rate value using a defined conversion relationship, and compares this converted value with the actual yaw rate sensor reading. This intermediary approach enables cross-validation of sensor data using existing sensors, improving reliability without adding hardware complexity.
2Device complexity
If model-based approaches are used to determine rotation rates from input variables, then sensor redundancy is reduced, but modeling accuracy and parameter estimation complexity increase
Solution Approach 1:
The patent transforms the verification problem from the yaw rate domain to the lateral acceleration domain by applying a parameter conversion. Instead of using complex vehicle dynamics models to estimate yaw rate from steering angle and speed, the system directly converts lateral acceleration measurements into an equivalent yaw rate value using a simplified conversion relationship. This parameter transformation approach maintains measurement precision while avoiding the complexity of dynamic modeling and parameter estimation.
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 method reduces the need for redundant sensors and complex modeling, providing a cost-effective and efficient means to assess the plausibility of rotation rates, thereby improving the monitoring of vehicle dynamics without additional hardware or extensive parameter estimation.
Implementation Method 1
a plausible value or a plausible range for the roll rate is determined from a change in lateral acceleration or a lateral jerk, in particular on the basis of a functional dependence of the roll rate on the change in lateral acceleration or on the lateral jerk
Data Source
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AI summary
The invention relates to a computer-implemented method for verifying the plausibility of a measured or determined roll rate (ϕ̇) of a vehicle body (2) of a vehicle (1) about a longitudinal axis (x) of the vehicle (1), in which a change in lateral acceleration (äy) or a lateral jerk (jy) is calculated from a measured or determined lateral acceleration (ay) in the lateral direction (y) of the vehicle (1), on the basis of which or on the basis of which a plausible value or a plausible range (4) for the roll rate (ϕ̇) is determined.