Vehicle Acceleration Control Using Environmental Tau Dynamics
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Solution Overview
Problem
Conventional vehicle acceleration control systems either result in uncomfortable acceleration for drivers or require cumbersome adjustments of acceleration characteristics to match individual driver preferences, and often involve multiple pre-defined settings.
Innovation Solution
An acceleration control system that detects surrounding objects using visual information and calculates target acceleration based on equations relating tau (τ) values, angular velocity, and distance, allowing for real-time adjustment to match driver's perceived acceleration feeling without pre-adjusting acceleration characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If constant acceleration control is implemented to reach target speed, then vehicle speed control accuracy is improved, but driver comfort deteriorates due to scary or offensive controlled operation
Solution Approach 1:
The patent applies dynamics by making the acceleration control characteristic changeable based on surrounding environment. The system dynamically adjusts acceleration patterns using visual information from the environment, transforming a static constant acceleration control into a dynamic adaptive control that responds to external conditions, thereby improving driver comfort while maintaining speed control accuracy.
Solution Approach 2:
The patent changes the acceleration parameter based on visual information about surrounding objects. By calculating tau values from visual data and adjusting acceleration characteristics accordingly, the system modifies control parameters in real-time to match driver expectations and environmental context, resolving the contradiction between precise control and driver comfort.
2Object-affected harmful factors
If multiple pre-defined acceleration characteristics are provided to match individual driver preferences, then driver comfort is improved, but device complexity increases due to cumbersome adjustment operations
Solution Approach 1:
The patent implements self-service by enabling the system to automatically determine appropriate acceleration characteristics based on visual information about the surrounding environment. The control system serves itself by using environmental tau values to automatically adjust acceleration patterns, eliminating the need for manual driver adjustments or complex pre-defined characteristic selections, thus improving comfort without increasing device complexity.
3Ease of operation
If acceleration control is based on visual information and tau theory, then ease of operation is improved by eliminating pre-adjustment operations, but measurement precision requirements increase for detecting surrounding object positions
Solution Approach 1:
The patent uses visual information about surrounding objects as an intermediary to determine acceleration characteristics. Instead of directly controlling acceleration based on speed error, the system uses environmental visual data (tau values from surrounding objects) as a mediator to indirectly control acceleration, simplifying operation while the precision requirements are managed through the mathematical relationships in tau theory.
Data Source
AI summary
An acceleration control system stores a target acceleration calculation equation acquired by transforming an equation that expresses that a product of the differentiation of the square power of the speed and the environmental factor αenv represents a sensed value ε of acceleration. A surrounding environment monitor device detects surrounding bodies present in the forward periphery of the vehicle, and an environmental factor calculation unit calculates the environmental factor αenv by using the detected positions of the surrounding bodies. A target acceleration setting unit successively sets target accelerations aref in compliance with the target acceleration calculation equation by using the environmental factor αenv. The acceleration is executed to match the driver's feeling.