Driving Assist Torque Map Synchronization for Smooth Mode Switching
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Solution Overview
Problem
Existing driving assistance systems experience sudden changes in torque when switching between automatic driving control and manual driving control due to unsynchronized changes in the required amount and torque map.
Innovation Solution
A driving assistance system comprising a first control unit that outputs a required amount and a second control unit that calculates a difference amount between the output amount and the actually measured actuator amount, using a torque map to control the actuator, allowing for smooth transitions between different driving assistance controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the torque map is changed when switching between driving assistance controls, then the control characteristics can be optimized for each mode, but the torque may change suddenly causing instability
Solution Approach 1:
The patent applies preliminary action by calculating and storing the integrated torque map in advance before switching between control modes. The integrated torque map is pre-computed to ensure smooth transitions, eliminating the need for sudden torque changes when switching from automatic driving control to manual driving control or vice versa.
Solution Approach 2:
The patent introduces an intermediary element - the integrated torque map - that mediates between different control modes. This integrated torque map serves as a buffer that smooths out transitions by combining torque characteristics from both automatic and manual control modes, preventing sudden torque changes during mode switching.
2Speed
If the required amount changes abruptly during mode switching, then the system can respond quickly to mode changes, but the torque map may not be synchronized causing sudden torque changes
Solution Approach 1:
The system performs preliminary calculation of the integrated torque map before mode switching occurs. By pre-computing the torque map that accounts for both automatic and manual control characteristics, the system ensures that when the required amount changes abruptly, the torque map is already synchronized and ready, preventing sudden torque changes while maintaining fast response.
3Adaptability or versatility
If different torque maps are used for different driving assistance controls, then each control mode can have optimized performance, but the transition between modes may cause torque discontinuity
Solution Approach 1:
The patent merges the torque characteristics of different control modes by creating an integrated torque map. This integrated map combines the torque characteristics from both automatic driving control and manual driving control, ensuring that when switching between modes, the torque changes smoothly rather than discontinuously, while still maintaining mode-specific optimization.
Solution Approach 2:
The integrated torque map acts as an intermediary that bridges different control modes. It smooths the transition by incorporating elements from both automatic and manual control torque maps, ensuring torque continuity while allowing each mode to maintain its optimized characteristics.
Data Source
AI summary
A driving assistance system includes: a first control unit configured to output an output amount related to a required amount; and a second control unit configured to calculate a difference amount between the output amount output and an actually measured amount of an actuator, and control the actuator based on the difference amount and a torque map, in which in assist control (second driving assistance control), the first control unit calculates a difference amount between a second required amount and the actually measured amount, acquires a division amount by dividing the difference amount by a predetermined value, and outputs a total amount of the division amount and the actually measured amount as the output amount, and the second control unit calculates a difference amount between the total amount and the actually measured amount, and controls the actuator based on the difference amount and a second torque map.