Vehicle Control System Noise Reduction for Driver Intent
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Solution Overview
Problem
Existing vehicle control systems fail to accurately reflect driver preferences and intentions in vehicle running characteristics due to noise components from road conditions and driver operations, leading to decreased accuracy in estimating driving orientation and incorporating driver requests into vehicle behavior.
Innovation Solution
A vehicle control system that uses a noise reduction unit to attenuate fluctuating components of vehicle parameters such as acceleration and road surface conditions, employing filters like low-pass and band-pass filters to remove unintended noise, thereby enhancing the accuracy of reflecting driver intentions in vehicle behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If vehicle parameters are used directly to estimate driving orientation, then the system responds quickly to driver operations, but noise components from road conditions and driver operations decrease measurement precision
Solution Approach 1:
The patent applies preliminary action by performing noise reduction processing on vehicle parameters before they are used for driving orientation estimation. The ECU detects vehicle parameters, applies noise reduction to remove fluctuating components caused by road conditions and driver operations, and then estimates driving orientation from the cleaned parameters. This preliminary noise reduction step ensures that the estimation process starts with high-quality data, resolving the contradiction between quick response and accurate measurement.
2Measurement precision
If fluctuating components are removed from vehicle parameters, then measurement precision of driving orientation improves, but device complexity increases due to additional filtering processing
Solution Approach 1:
The patent replaces complex mechanical or hardware-based noise reduction systems with software-based signal processing algorithms implemented in the ECU. Instead of using physical filters or additional sensors, the system uses computational methods to detect and remove fluctuating components from vehicle parameters. This substitution maintains measurement precision while avoiding the complexity of additional hardware systems.
3Ease of operation
If noise reduction processing is applied to vehicle parameters, then drivability improves by accurately reflecting driver intentions, but loss of time occurs due to additional processing steps
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the noise reduction processing based on the detected driving state. The ECU identifies fluctuating components in vehicle parameters and selectively removes them based on the current operating conditions. This adaptive approach ensures that noise reduction is performed efficiently without excessive processing time, while still achieving the goal of accurately reflecting driver intentions for improved drivability.
Data Source
AI summary
A vehicle control system obtains an index indicating a running condition of a vehicle on the basis of a vehicle parameter indicating a motion of the vehicle and then sets a running characteristic of the vehicle in accordance with the index. The vehicle control system includes a noise reduction unit that is configured to obtain the index on the basis of the vehicle parameter of which a fluctuating component that fluctuates because of a driver's driving operation or the influence of a running road surface.