Eek Noise Vibration and Harshness
Lead Research Organisation:
Loughborough University
Department Name: Wolfson Sch of Mech, Elec & Manufac Eng
Abstract
The investigation focuses on noise vibration and harshness phenomena generated due to the interaction between friction and system dynamics in automotive power trains under various operating conditions.
The main aim of the study is to identify the main qualitative and quantitative characteristics of the phenomenon using noise and vibration measurements captured from vehicles. A model of the drivetrain system will be developed to understand the fundamental mechanism of vibration and noise. The model will be validated against experimentally measured data. A parametric study can then be conducted to find the main influencing parameters of the system.
The project is envisaged to establish a direct coupling between tribology and system dynamics to describe the root causes of NVH issues.
The main aim of the study is to identify the main qualitative and quantitative characteristics of the phenomenon using noise and vibration measurements captured from vehicles. A model of the drivetrain system will be developed to understand the fundamental mechanism of vibration and noise. The model will be validated against experimentally measured data. A parametric study can then be conducted to find the main influencing parameters of the system.
The project is envisaged to establish a direct coupling between tribology and system dynamics to describe the root causes of NVH issues.
People |
ORCID iD |
| Stephanos Theodossiades (Primary Supervisor) | |
| Ilias Minas (Student) |
Studentship Projects
| Project Reference | Relationship | Related To | Start | End | Student Name |
|---|---|---|---|---|---|
| EP/N509516/1 | 01/10/2016 | 30/09/2021 | |||
| 1890902 | Studentship | EP/N509516/1 | 01/04/2017 | 31/12/2020 | Ilias Minas |
| Description | The topic under investigation is clutch Noise, Vibration and Harshness (NVH). During the clutch engagement process the relative motions of every part lead the system to vibrate, exhibiting NVH behaviour at a frequency that is audible to the driver inside the cabin. This is due to interaction between friction and system dynamics. The main findings of the study are to identify the mechanism of this behaviour. By understanding its source and how this noise is produced some solutions related to the tribodynamics of the clutch systems are proposed. The project has as aim to couple the tribology and system dynamics in order to describe the root of this NVH behaviour. |
| Exploitation Route | By improving the state of the art of automotive hardware, simulation techniques and furthering fundamental knowledge of clutch friction disk dynamics. System level models which predict dry clutch behaviour during the engagement/disengagement have been developed. The fundamental understanding of this process can be applied during upfront development of future automotive applications and to numerous other friction disk applications, for example disk brake systems and wet clutch systems. . |
| Sectors | Aerospace, Defence and Marine,Transport |
| Description | To improve dry clutch system operation, predict and mitigate unwanted NVH phenomena coming from the clutch system. The results indicate key system parameters which should be addressed to mitigate unwanted noise and vibration phenomena. Design guidelines of the clutch system can be proposed for the mitigation of NVH issues |
| Sector | Aerospace, Defence and Marine,Transport |
| Impact Types | Economic |
| Title | Dry clutch transient dynamics model |
| Description | Computer model to predict dry clutch component transient dynamics. Optimization procedures to develop design guidelines for the clutch system in order to mitigate NVH issues |
| Type Of Material | Computer model/algorithm |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| Impact | Identification of key design parameters that affect clutch NVH. If there is a URL which relates to this research dataset, database or model, enter it here. |
| URL | https://journals.sagepub.com/doi/full/10.1177/0954406220927065 |
| Title | Dry clutch transient dynamics models |
| Description | Computer model to predict dry clutch component transient dynamics. Optimization procedures to develop design guidelines for the clutch system in order to mitigate NVH issues |
| Type Of Material | Computer model/algorithm |
| Year Produced | 2018 |
| Provided To Others? | Yes |
| Impact | Identification of key design parameters that affect clutch NVH. |
| URL | https://saemobilus.sae.org/content/2018-01-1537 |
| Title | Dry clutch transient dynamics models |
| Description | Computer model to predict dry clutch component transient dynamics. Optimization procedures to develop design guidelines for the clutch system in order to mitigate NVH issues |
| Type Of Material | Computer model/algorithm |
| Year Produced | 2020 |
| Provided To Others? | Yes |
| Impact | Identification of key design parameters that affect clutch NVH. If there is a URL which relates to this research dataset, database or model, enter it here. |
| URL | https://www.sae.org/publications/technical-papers/content/2020-01-1510/ |
| Description | Collaboration with Ford Motor Company |
| Organisation | Ford Motor Company |
| Department | Ford UK |
| Country | United Kingdom |
| Sector | Private |
| PI Contribution | The research team at Loughborough University have conducted measurements on components to determine frictional, geometric, inertial and dynamic properties. The team have formulated and created several dynamic clutch models to study transient motion. The team have used the model to describe key Noise Vibration and Harshness phenomena and propose design solutions. |
| Collaborator Contribution | Access to data, partial funding and in kind support for consumable and specimens. Monthly meetings to discuss progress and industrial application of the research. |
| Impact | Presentations to International Conferences and publications in International Journals. The collaboration is multi -disciplinary comprising structural dynamics and tribology. |
| Start Year | 2017 |
| Description | International Styrian Noise Vibration and Harshness conference |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Industry/Business |
| Results and Impact | Presentation of results related to clutch NVH, to academic and industry staff. |
| Year(s) Of Engagement Activity | 2018 |
| Description | International Styrian Noise Vibration and Harshness conference |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Industry/Business |
| Results and Impact | Presentation to academic and industry staff of clutch system modelling and results related to clutch NVH and system design optimization. |
| Year(s) Of Engagement Activity | 2020 |
| Description | Loughborough University Research conference |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Local |
| Primary Audience | Postgraduate students |
| Results and Impact | 20 fellow postgraduate researchers and academic staff from a wide range of research areas attended, which sparked questions and discussion afterwards. |
| Year(s) Of Engagement Activity | 2017,2018,2019 |