Vehicle Noise Simulation for Active Noise Control 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 with objectively testing noise variations during travel.

Innovation Solution

A simulation system that generates a reference signal and noise signal based on pre-stored samples, synchronizing their arrival times to accurately reproduce the vehicle's noise environment without actual driving, using a control unit and speaker to output sound waves for noise control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If vehicle driving is performed for active noise control testing, then noise data can be collected for system development, but development time and cost increase significantly

Engineering Contradiction:

Improvenoise data collection accuracyVSAvoiddevelopment time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-collecting noise data during vehicle operation and storing it in a database before actual testing. This allows the testing phase to use pre-prepared noise environments without requiring actual vehicle driving during tests, thereby reducing development time while maintaining data accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a virtual noise environment by copying and reproducing real vehicle noise data in a simulated setting. The noise database contains recorded noise characteristics that are replayed during testing, replacing the need for actual vehicle operation and providing consistent, repeatable test conditions.

Inventive Principle:

Principle #26Copying

2Measurement precision

If vehicle driving is performed for active noise control testing, then noise data can be collected, but testing cost increases

Engineering Contradiction:

Improvenoise data collection accuracyVSAvoidtesting cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent uses copying by creating virtual noise environments from recorded data. Instead of repeatedly driving vehicles for tests, the system copies real noise characteristics into a database and replays them during testing, significantly reducing testing costs while maintaining measurement accuracy.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent replaces the mechanical system of actual vehicle operation with a digital/simulated system. Rather than physically driving the vehicle to generate noise for testing, the system uses stored digital noise data to create virtual noise environments, eliminating fuel consumption, wear, and operational costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If active noise control is tested during vehicle traveling, then real noise environment can be evaluated, but objective testing becomes difficult due to noise variations

Engineering Contradiction:

Improvereal noise environment evaluationVSAvoidobjective testing consistency

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies periodic action by replaying the same recorded noise data multiple times during testing. This creates consistent, repeatable test conditions where the same noise environment can be evaluated repeatedly, enabling objective comparison of active noise control performance without the variability of different real-world driving conditions.

Inventive Principle:

Principle #19Periodic action

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 eliminates the need for vehicle driving during testing, reducing development time and cost while accurately simulating the noise environment for active noise control system testing.

Implementation Method 1

a speaker electrically connected to the control unit and configured to convert the noise signal into a sound wave and output the sound wave

Methodology Applied

Scientific EffectElectroacoustic conversion:

Data Source

PatentUS12057100B2Simulation method and system for noise environment of vehicle

Publication Date: 2024.08.06 HYUNDAI MOTOR CO LTD

AI summary

A simulation system and method for simulating a noise environment of a vehicle includes a memory configured to store a reference sample signal and a noise sample signal, a control unit electrically connected to the memory and configured to generate a reference signal based on the reference sample signal, generate a noise signal based on the noise sample signal, and transmit the reference signal to a noise control system, and a speaker electrically connected to the control unit and configured to convert the noise signal into a sound wave and output the sound wave.