Details of Grant 

EPSRC Reference:	GR/H75596/01
Title:	SHAFT AND STRUCTURE BORNE NOISE INDUCED BY INVERTER FED MOTORS ON SHIPS (SHP 133)
Principal Investigator:	Yacamini, Mr R
Other Investigators:	Neilson, Professor R White, Professor R White, Professor R
Researcher Co-Investigators:
Project Partners:
Department:	Engineering
Organisation:	University of Aberdeen
Scheme:	Standard Research (Pre-FEC)
Starts:	01 January 1993	Ends:	29 February 1996	Value (£):	142,437
EPSRC Research Topic Classifications:	Mech. & Fluid Power Transmiss.
EPSRC Industrial Sector Classifications:	Transport Systems and Vehicles
Related Grants:
Panel History:
Summary on Grant Application Form
1. To describe the forcing function caused by airgap flux in a sinusoidal fed machine. 2. To describe the forcing function caused by airgap flux in an inverter fed machine. 3. To show how this will cause vibration at the machine pads. 4. To include this induced vibration in propagation calculations. 5. To also calculate the noise produced through the propeller shaft. (1) Review previous theory on the development of forces on the rotor and stator of a motor with sinusoidal air gap fluxes. (2) Develop a model of flux distribution in the air gap which will allow both amplitude and order to be determined in the same calculation. (3) Using the calculated flux, determine the forcing function which this will generate on the machine stator fram using the Saber time domain simulation package. (4) Measurement of laboratory machine natural frequencies and modelling of mode shapes using Pafec Spiders software. (5) Incorporation of machine mechanical properties into Saber templates. (6) Validation of developed models using laboratory measurements from machine with a quasi square wave drive. (7) Incorporation of full scale machine parameters into model. Use of data supplied by UK and Canadian cooperators to set up and validate models of existing and proposed ship drive schemes. Further daya will be supplied from the GEC/CEGELEC test facility at Rugby as required. (8) Discussion of results and how they can be incorporated into vibrational load flow calculations with Yard and ISVR.
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Organisation Website:	http://www.abdn.ac.uk