ADAS Steering Actuation Assessment via Acceleration Error Feedback
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Solution Overview
Problem
Advanced driver-assistance systems (ADAS) in vehicles face challenges in real-time assessment and control of steering actuation and lateral control, leading to potential inefficiencies, vehicle damage, or collisions due to inaccurate vehicle control.
Innovation Solution
A system comprising sensors, an inertial measurement unit, and a processor that detects lane markers, generates a motion path, compares theoretical and measured accelerations to calculate an error term, and adjusts vehicle control accordingly, enabling real-time lateral control and steering actuation assessment, as well as disabling or limiting ADAS functions based on error thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time assessment and control of steering actuation and lateral control is implemented, then vehicle control accuracy and safety are improved, but system complexity and computational requirements increase
Solution Approach 1:
The system continuously compares measured lateral acceleration from the IMU with theoretical acceleration values calculated from the motion path, generating real-time feedback to assess steering actuation accuracy and adjust control parameters accordingly
Solution Approach 2:
The patent replaces complex mechanical steering assessment mechanisms with electronic sensors (IMU) and computational algorithms that calculate theoretical acceleration and compare it with measured values to assess steering performance
2Measurement precision
If continuous monitoring and adjustment of vehicle control parameters is performed, then steering actuation accuracy is improved, but energy consumption increases
Solution Approach 1:
The system performs periodic assessment cycles where the processor compares measured acceleration with theoretical values at regular intervals, adjusting control parameters only when deviations exceed thresholds, rather than continuous adjustment
3Reliability
If the system disables ADAS functions in response to error terms, then vehicle safety is improved, but automation capability is reduced
Solution Approach 1:
The system dynamically adjusts the level of automation by selectively disabling specific ADAS functions based on assessed error terms, rather than completely disabling all automated functions, maintaining optimal automation level for current operating conditions
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 solution ensures safe and comfortable vehicle operation by accurately assessing and adjusting steering and braking functions, preventing deviations from the intended path and enhancing occupant safety by enabling real-time feedback and adaptive control.
Implementation Method 1
an inertial measurement unit for measuring a measured acceleration of a host vehicle
Data Source
AI summary
The present application relates to a method and apparatus for real time lateral control and steering actuation assessment for a motor vehicle by determining a desired host vehicle path, establishing a control point along the host vehicle path, generating a motion path between a host vehicle location and the control point, estimating a theoretical acceleration of the host vehicle along the motion path, controlling the host vehicle along the motion path, receiving a measured acceleration from an inertial measurement unit within the host vehicle, generating an error term in response to a comparison of the motion path and the measured lateral travel, and adjusting the performance limits of the sub-features in response to the error term.