Adaptive Braking System Controller for Environmental Compensation
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Solution Overview
Problem
Braking systems in motor vehicles face challenges in adapting to varying driving conditions, such as overheating brakes and adverse weather, which can lead to reduced braking responsiveness and increased risk of collisions, requiring drivers to adjust their techniques accordingly.
Innovation Solution
An adaptive braking system that uses a controller to determine braking assistance based on environmental and vehicle condition parameters, adjusting the braking response by mapping brake actuation parameters to pedal application parameters through a function that can be linear or nonlinear, incorporating sensors for temperature, humidity, rainfall, wheel speed, and vehicle motion to provide optimal braking assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drivers operate brakes more firmly to compensate for reduced braking responsiveness under adverse conditions, then braking effectiveness is improved, but the risk of skidding or loss of control increases on icy or loose road surfaces
Solution Approach 1:
The system dynamically changes the braking assistance parameter (effective pedal ratio) based on detected driving conditions. When adverse conditions are detected, the controller adjusts the braking assistance function to provide appropriate braking force, preventing both insufficient braking and excessive force application that could cause skidding.
Solution Approach 2:
The system uses feedback from environmental sensors (temperature, humidity, rainfall detection) to continuously monitor driving conditions and automatically adjust braking assistance. This closed-loop feedback mechanism ensures braking force is optimized for current conditions without requiring driver intervention or judgment.
2Reliability
If drivers adapt their braking techniques for different driving conditions, then braking performance is improved, but driver workload and complexity of operation increase
Solution Approach 1:
The braking system performs self-adjustment based on environmental condition parameters detected by sensors. The controller automatically modifies the braking assistance function according to detected conditions such as temperature, humidity, and rainfall, eliminating the need for drivers to manually adapt their braking techniques for different conditions.
Solution Approach 2:
The system determines the appropriate braking assistance function in advance of brake application based on currently detected environmental conditions. This preliminary adjustment ensures optimal braking performance is ready when the driver applies the brakes, without requiring real-time driver adaptation.
3Speed
If braking assistance is increased to compensate for wet or icy roads, then braking responsiveness is improved, but the likelihood of wheel lockup and skidding increases
Solution Approach 1:
The system dynamically adjusts the braking assistance function based on detected environmental conditions. The effective pedal ratio is modified in real-time according to conditions such as rain, ice, or overheating, providing increased braking responsiveness when needed while automatically reducing assistance when conditions indicate lower friction availability, preventing wheel lockup.
Data Source
AI summary
An adaptive braking system for a motor vehicle includes an assisted braking system and a controller arranged to determine, in response to one or more driving condition parameters and in advance of a brake application, the braking assistance to be provided. Braking assistance is defined by a function which maps a brake actuation parameter to be applied from a detected brake pedal actuation parameter. Each driving condition parameter includes an environmental condition parameter. The controller may also adjust the braking assistance in response to one or more braking response signals.