2011年3月29日 · This book provides readers with a fundamental understanding of current practices for measuring and testing brake NVH. From coverage of basic definitions and concepts to in-depth analysis of on-road testing procedures, it will serve as a comprehensive reference guide for brake test technicians, test engineers, lab managers, and others who work ...

2014年8月22日 · Engineers measure brake noise with microphones and even laser vibrometers to determine what components are the sources of NVH. You may have observed that the two different sizes of pickle-forks vibrated at different rates due to their mass, material (associated with the degree of damping or energy dissipation) and shape.

"NVH (noise, vibration, harshness)" spoils the pleasant ride of an automobile. Suppressing NVH is a very important design criteria when developing a brake system.

This book provides readers with a fundamental understanding of current practices for measuring and testing brake NVH. From coverage of basic definitions and concepts to in-depth analysis of on-road testing procedures, it will serve as a comprehensive reference guide for brake test technicians, test engineers, lab managers, and others who work ...

A new NVH matrix for brake noise test rigs is presented which combines the specifications of the European drag mode test developed by the AK Noise ('Arbeitskreis

4.3 Brake NVH Dynamometers 57 4.4 Electric Motor 60 4.5 Mechanical Inertia and Inertia Simulation 61 4.6 Enclosures 63 4.7 NVH Dynamometer Special Considerations 66 4.8 Brake Noise Measurement Standards 67 4.9 Examples of Brake Dynamometers 78 4.10 Summary 85 Chapter 5: On-Road Testing 87

2016年6月15日 · Numerical methods for brake squeal analysis are widely accepted in industry. The use of complex eigenvalue analysis is a successful approach to predict the appearance of squeal noise. Using simulation in an early design stage reduces time to market, saves costs, and improves the physical behavior an

2005年7月1日 · A brake rotor’s NVH signature extends below the surfaces and goes deeper into the microscopic realm of metallurgical/material properties. If the rotor does not have the same mass or metallurgical content as the OE rotor, there may be less mass and inherent damping to minimize rotor dynamic instabilities.

An innovative procedure for brake NVH durability testing has been developed by Applus+ IDIADA in order to investigate noise events during braking. An acquisition system (dbBrake) and software (dbSoft) have been developed with the aim of analyzing high and low frequency noise during braking and carrying out an automatic analysis of occurrence ...

2022年7月26日 · NVH (Noise, Vibration & Harshness) is one of the most important characteristics to optimize during a vehicle development cycle. In order to meet the NVH targets, there are various noise reduction strategies that can be used: ISOLATION: Reduce the transmitted vibration across structures.