Vehicle Noise Simulation for Synchronized ANC Testing
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Solution Overview
Problem
Conventional methods for testing active noise control in vehicles require driving the vehicle, which is costly and time-consuming, and struggle to objectively assess noise control performance due to varying noise conditions with each drive.
Innovation Solution
A simulation system and method that replicates a vehicle's noise environment by generating reference and noise signals, synchronizing their arrival times, and adjusting transmission or output times to accurately test active noise control without physical vehicle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a vehicle is driven to collect noise data for active noise control testing, then noise data can be obtained, but development time and costs increase significantly
Solution Approach 1:
The patent creates a simulation system that copies the actual vehicle noise environment by playing back recorded noise signals through speakers. This allows testing of active noise control algorithms without requiring actual vehicle driving, thereby obtaining noise data efficiently while reducing development time and costs.
2Reliability
If a vehicle is driven to test active noise control, then performance can be evaluated, but the testing becomes costly and time consuming
Solution Approach 1:
The simulation system reproduces the vehicle's noise environment by playing back recorded noise signals through speakers positioned in the vehicle interior. This allows reliable performance evaluation of active noise control algorithms without requiring actual vehicle driving tests, significantly improving testing efficiency while maintaining evaluation reliability.
3Reliability
If active noise control is tested during vehicle traveling, then real-world performance can be confirmed, but noise varies for each traveling making objective testing difficult
Solution Approach 1:
The system records noise signals from actual vehicle traveling and plays them back through speakers during simulation tests. This copies the real-world noise conditions consistently across multiple tests, allowing objective performance evaluation while maintaining the authenticity of real-world noise characteristics.
4Adaptability or versatility
If noise sample signals are played back through a speaker, then noise environment can be simulated, but synchronization between reference signal and noise signal becomes challenging
Solution Approach 1:
The simulation system uses a microphone to detect the noise signal generated by the speaker, and the control unit calculates the transfer function based on the relationship between the played-back noise signal and the detected signal. This feedback mechanism enables precise synchronization and accurate reproduction of the noise environment despite variations in playback conditions.
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
This approach reduces development time and costs by allowing for objective testing of active noise control in a stationary vehicle, ensuring accurate noise environment reproduction and improved noise control performance.
Implementation Method 1
a speaker configured to convert an electrical signal into a sound wave and output the sound wave
Data Source
AI summary
The present disclosure provides a device and method for simulating a noise environment of a vehicle. The simulation system includes a memory configured to store a reference sample signal and a noise sample signal, a speaker configured to convert an electrical signal into a sound wave and output the sound wave, and a control unit configured to generate a reference signal based on the reference sample signal, generate a noise signal based on the noise sample signal, transmit the reference signal to a noise control system, output the noise signal through the speaker, and adjust at least one of a transmission time of a next reference signal or an output time of a next noise signal based on a reception time at which the noise control system receives the reference signal and a measurement time at which the noise control system measures the noise signal.