Remote ANC Filter Updates for Low-Power Vehicle Controllers

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Solution Overview

Problem

Existing vehicle noise control systems face limitations due to low-performance controllers, particularly in adapting to various noise sources, and there is a need for improved active noise control methods that can efficiently reduce noise without significant computational delays.

Innovation Solution

A remote ANC system is implemented, where a remote server updates adaptive filters and a vehicle generates noise control signals using these filters, with data structures ensuring lossless data transmission and partial utilization of non-loss data during communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the vehicle controller performs all active noise control computations locally, then real-time noise control is achieved, but the controller performance is insufficient due to low computational capabilities

Engineering Contradiction:

Improvenoise control performanceVSAvoidcontroller computational capability

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A remote server acts as an intermediary to perform complex adaptive filter updates. The server receives local signals from the vehicle, computes updated adaptive filters using powerful computational resources, and transmits them back to the vehicle controller. This mediator approach allows the vehicle to achieve high-performance noise control without requiring a high-capability onboard controller.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If adaptive filters are updated frequently to improve noise control adaptability, then noise control performance is enhanced, but communication data transmission requirements increase

Engineering Contradiction:

Improvenoise control adaptabilityVSAvoidcommunication data volume

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent extracts and transmits only the essential update information - specifically the adaptive filter coefficients - rather than transmitting complete signal data or redundant information. This extraction approach minimizes communication data volume while maintaining the ability to frequently update adaptive filters for improved noise control adaptability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If complete data transmission is required for accurate adaptive filter updates, then update accuracy is maintained, but data loss in communication packets causes control delays

Engineering Contradiction:

Improveadaptive filter update accuracyVSAvoidupdate delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system implements partial action by allowing adaptive filter updates to proceed even when some data packets are lost during transmission. The vehicle controller can partially utilize received update information to improve noise control, rather than waiting for complete data reception. This approach accepts some degradation in update accuracy to eliminate delays caused by waiting for complete packet reception.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250308505A1Remote ANC System and Operation Method Thereof

Publication Date: 2025.10.02 HYUNDAI MOTOR CO LTD

AI summary

A method and a device for a remote active noise control (ANC) of a vehicle are provided. The method includes receiving one or more local signals from a vehicle, wherein each local signal includes a reference signal, a noise control signal, an error signal, or a virtual error signal; updating the adaptive filters using the one or more local signals; and transmitting the updated adaptive filter to the vehicle.