Active Aerodynamic Noise Control Through Correlation-Based Sensor Placement
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Solution Overview
Problem
Conventional ANC systems lack active noise control technology for aerodynamic noise regions and involve a random process for sensor attachment, leading to increased cost and time inefficiencies.
Innovation Solution
An active aerodynamic noise control apparatus that selects a vehicle aerodynamic noise region based on correlation coefficients from ultrasonic, acoustic, and SoundCam measurement data, using a SoundCam, ultrasonic, and acoustic sensors to generate and output active noise control sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ANC systems use random sensor attachment and testing, then aerodynamic noise control is not achieved, but cost and time are increased
Solution Approach 1:
The system performs preliminary actions by using SoundCam to visualize aerodynamic noise regions before sensor attachment, and calculates correlation coefficients in advance to determine optimal sensor positions. This preliminary analysis eliminates the need for random attachment and iterative testing, directly resolving the contradiction between achieving reliable noise control and reducing time loss.
2Reliability
If conventional ANC systems do not consider aerodynamic noise region, then aerodynamic noise is not controlled, but system complexity is reduced
Solution Approach 1:
SoundCam serves as an intermediary tool that visualizes aerodynamic noise regions, enabling the system to identify and target specific noise sources without requiring complex direct measurement equipment. This intermediary approach achieves reliable aerodynamic noise control while managing system complexity through visualization rather than direct physical measurement.
3Ease of manufacture
If sensor attachment location is randomly selected, then testing is required, but manufacturing process is simpler
Solution Approach 1:
The system replaces mechanical trial-and-error attachment methods with a computational approach using SoundCam visualization and correlation coefficient calculations. This substitution maintains manufacturing simplicity by avoiding complex mechanical positioning equipment while achieving high measurement precision through data-driven sensor placement optimization.
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
Optimizes sensor placement for improved active noise control performance, considering aerodynamic noise, enhancing user satisfaction by effectively reducing noise in vehicle environments.
Implementation Method 1
an ultrasonic data measurement unit configured to measure primary ultrasonic data using a primary ultrasonic sensor previously installed inside the vehicle
Implementation Method 2
an acoustic data measurement unit configured to measure primary acoustic data from an acoustic sensor previously installed inside the vehicle
Implementation Method 3
a SoundCam installed inside a vehicle, an aerodynamic noise data measurement unit configured to measure aerodynamic noise data based on SoundCam measurement data
Data Source
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AI summary
An active aerodynamic noise control apparatus includes a SoundCam installed inside a vehicle, an aerodynamic noise data measurement unit configured to measure aerodynamic noise data, an ultrasonic data measurement unit configured to measure primary ultrasonic data, an acoustic data measurement unit configured to measure primary acoustic data, a correlation coefficient calculation unit configured to calculate a correlation coefficient, an ultrasonic sensor location confirmation unit configured to confirm a secondary ultrasonic sensor location, an ultrasonic data collection unit configured to collect secondary ultrasonic data, an acoustic data collection unit configured to collect secondary acoustic data, an aerodynamic noise region determination unit configured to determine an aerodynamic noise region, an active noise control sound generation unit configured to generate an active noise control sound, and an active noise control sound output unit configured to output the generated active noise control sound.