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Ship-EDF

A Software Simulation Environment for the Electromagnetic Design of modern ship covering the whole EMC/RCS applications spectrum.

Matching the requirements of modern naval units with a growing number of electronic systems and an increased survivability of the ships against radar threats.  

 
The solution for concurrent electromagnetic design, in co-operation with naval architects including a set of validated state of the art e.m. solvers, integrated into a framework designed for the naval applications involved

 
 

Ship-EDF Overview


Including two concurrent analysis sections, namely:

EMP: ElectroMagnetic Prediction. TLC/Radar/EW Antenna Siting and Performance Analysis on metallic and non-metallic ship structures: antenna radiation patterns, antenna impedance, inter antenna coupling and electromagnetic interference, radiation hazard on board.
 
Ship EDF-RCS: Ship Signature Prediction. Radar Signature Reduction and Control: RCS diagrams, identification of scattering contributors and centres distribution, statistical behaviour.

Concurrent approach is achieved thanks to:

Integrated modelling environment. The geometrical and e.m. mesh ship models are performed under a unified CAD/Meshing environment, easily interfacing to naval architects CAD tools.
Ship Data Base for the automatic organisation of analysis data and results, allowing the ship configuration control at every project stage, according to object oriented methodologies.
Advanced electromagnetic solvers. The core of the system includes state-of-the-art simulation techniques, capable of realistic e.m. computations. The Ship EDF e.m. modules have been completely developed by IDS since 1982, and are thoroughly validated on real ship applications.
 

Ship EDF /SEMP:
The EMC/Antenna module


  • EMC/EMI analysis of all aspects of Ship/Antenna integrated system, for metallic, non metallic, and hybrid metallic/composite ships (GRP, shielded/absorbing materials) ;
  • Ship Modelling over all the frequency spectrum of modern naval units;
  • Antenna Modelling covering all the system types in use on modern ships, for the application to TLC/HF/V/UHF, Radar/Search, Radar/FCS, IFF, EW, SATCOM, Navigation equipments;
  • Radiation Hazard (HERO, HERP, HERF, HERE, HERA) assessment; computation of near field distribution and plotting of contour limits on ship scale drawings for a direct use by operators;
  • Communications Coverage and antenna pattern computation on the 3D solid to identify the complete antenna performance for line of sight, ground and sky wave propagation modes;
  • Interference/EMI assessment for TLC/Radar/EW, based on inter antenna coupling computation;
  • Radar processing for: false echoes identification and occurrence, off boresight angle errors extraction, radar range loss due to structure masking and others;
  • Physical insight into propagation  phenomena suited for results interpretation: plot of currents induced on ship by transmitting communication antennas, radar emission ray tracing paths visualisation on ship 3D CAD;
  • Operative evaluation of ship e.m. performance based on processing including: statistics, system performance index evaluation, comparisons with requirements for coverage and interference.
 

Ship-EDF/SSP: The SIGNATURE module


 
  • RCS and related parameters analysis including the scattering mechanisms simulations from low (UHF) to high (mm wave) frequencies; the whole spectrum of interest for modern ship survivability items can be analysed, and modelling item is performed on the basis of a categorisation of the ship into parts and equipment subsystems
  • Hot spots identification on ship structures allowing the immediate, interactive display of major scattering centres (the hot spots) directly on the mesh model within the CAD environment
  • Sea multipath effects can be included in the analysis, by taking into account of sea roughness;
  • RAM/RAS panels modelling, concerning dielectric or magnetic material properties;
  • SAR/ISAR two-dimensional images computation and processing;
  • Multiple interactions coming from contributions of different  structure parts.
  • IR and other signature modules can be added to have a global ship signature environment capable of supporting the ship project from the survivability point of view.

Ship-EDF SW/HW Architecture

 
Ship EDF SW architecture
Ship EDF SW architecture is based on a client server concept. The system includes the user front end section, the framework client environment devoted to the user friendly working procedures management, the framework server engine tools which control the simulation processes by a continuous verification of data transfer operations and of the analysis sequence procedures, the data base section which supports the storage and management of I/O data and intermediate process data exchange.
The system is designed to be used in Stand – Alone or Client/Server customisable configurations.
The structure is configured for expansion in terms of working stations and multiple computation servers, in order to match the requirements of a team working environment.
Suitable output results display and printing units are needed to provide best output format presentations of e.m. analysis.



 


 
Server: INTEL 32 and 64 Bit CPU with Windows 2000, Windows XP, Windows 2003 operating system.

Client: INTEL Workstation with Windows 2000, Windows XP, MICROSTATION v.8.x, ORACLE Server v.9.2 or higher