Virtual Ship. Aldo Zini. Ambiente integrato ed interoperabile per la simulazione navale. Cetena S.p.A.

Transcription

1 Virtual Ship Ambiente integrato ed interoperabile per la simulazione navale Aldo Zini Cetena S.p.A.

2 Simulation in Ship Design

3 Why using simulation in Ship Design Hydrodynamics Sea Trials Information Technology Virtual Reality To demonstrate feasibility of design choices Structures CAD Models Ergonomics User requirements Materials Simulation Analysis To verify operative requirements in dangerous/extreme situations To predict system performance in operational scenarios CONCEPT: Conceive, Design, Test, Train and Operate the Ship on Computer before Cutting Metal

4 Virtual Ship More More complexity Multiple Multiple Entities Entities Real-time visualization Environment interaction Interactive Behaviour (man (man in in the the loop) loop)

5 What are Virtual Ships? Virtual Ship Suites of simulations depicting the behaviour of real ships for many purposes including: Predicting operational performance Demonstrating requirements are being met Testing technical integration of different platforms and sub-systems virtual trials Predicting safe operating envelopes virtual trials Evaluating problems not identified by traditional analyses Further evaluating and comparing design alternatives Setting and testing requirements for training systems

6 Why use Virtual Ships? Virtual Ship Offers virtual prototypes to help reduce / avoid costs of the Class Allows operators to evaluate requirements and designs Allows operators to examine safe operating envelopes during design and extend envelopes verified during sea trials Reduces size and cost of sea trials Provides base technology for training systems

7 Virtual Ship Integrated Architecture Italian Navy

8 Aim To develop three simulation environments representing the following operations: Replenishment At Sea Craft landing in the internal dock of a LPD Ship VTOL vehicles operations on aircraft carrier

9 General Characteristics HLA based VS-FOM Interactive Real-Time visualization Detailed Physics

10 Replenishment at Sea To simulate Replenishment operations in open seas with different meteorological conditions To verify operation constraints (ships speed, distance ) To analyse different RAS devices in term of position, operative behaviour, efficiency etc.

11 Operational Verifications Previous experience Port traffic Two ship cooperating

12 Conceptual Model Wave Heading, Sea State Environment Environment SEA AIR Wind Direction, Wind Speed Hull Geometry Manoeuvrability Interface RAOs Heading, speed Supply Ship Motion Ship Supply Interaction Forces Supply Position Interactions Module Interaction Receiving Interaction Forces Receiving Position Receiving Ship Motion RAOs Heading, speed Hull Geometry Manoeuvrability Interface Visualization Module Visualization RAS Process Model Pipe geometry RAS Pipe Dynamical Model RAS Equipment Feasibility Flag

13 RAS Federation Supply Ship Receiving Ship RAS Equipment Run Time Infrastructure Environment Interactions Visualization

14 Landing Craft operations in a LPD Ship To simulate LCU behaviour inside the internal dock To evaluate feasibility of tank loading/unloading on the LCU To verify operation constraints (LPD ships speed, LCU characteristics ) To analyse different internal dock deck configurations

15 Previous experience Ingress of the small boat into the wet deck of the amphibious ship for collision detection analysis. Behaviour of the landing craft approaching amphibious ship

16 Conceptual Model Wave Heading, Sea State Environment Environment SEA AIR Hull Geometry Manoeuvrability Interface RAOs Heading, speed LPD Ship Motion Ship Wind Direction, Wind Speed LPD 6 DOF Velocity Acceleration Internal Sea Model Internal Sea Internal Sea Data LCU Craft Motion LCU RAOs Heading, speed Hull Geometry Manoeuvrability Interface Collision Detection Module Contact Contact Point Forces Calculation Contact Forces Feasibility Manoeuvre Feasibility Module Feasibility Flag Visualization Module Visualization LCU 6 DOF Velocity Acceleration

17 LPD Federation Virtual Ship Virtual LCU Feasibility Visualization Run Time Infrastructure Environment Internal Sea Contact Forces

18 VTOL operations on ship To simulate take-off and landing operations To evaluate feasibility of operations in different environmental conditions To take into account ship manoeuvring behaviour during operation

19 Previous experience Helicopter take-off and landing operation of on a frigate Interaction between aircraft simulator and a ship simulation in a geographically distributed HLA federation.

20 Wave Heading, Sea State Environment Environment Environment SEA AIR Wind Direction, Wind Speed Hull Geometry Manoeuvrability Interface RAOs Heading, speed Virtual Ship Motion Ship Ship Position Air Wake Module Air Wake Interaction Forces Calculation Module VTOL Position VTOL Interaction Forces Virtual VTOL Motion Helo VTOL Data VTOL Path VTOL Geometry & Parameters Path specification Conceptual Model Visualization Module Visualization Manoeuvre Feasibility Feasibility Module Feasibility Flag

21 VTOL Federation Ship VTOL Air Wake Run Time Infrastructure Environment Feasibility Visualization

22 Early Prototype Main characteristics Ship motion federate Simplified Ship-Ship interaction module Simplified Correlation between external and Internal sea in LPD scenario Simplified air-wake module Visualization federate Federation based on VS-FOM Schedule Delivery within the end of the year

23 Possible International Cooperations under the Virtual Ship MoU framework SHOLS with UK RAS with Canada LPD with Netherland

24 Future Vision Reuse of Simulation components Operate Training Design Test Simulation as connection technology among different ship life phases

25 Integrated Test Bed Future Vision Virtual Ship Motions Ship 1 Command & Control Damage External entity A propagation Sensors Communications Defense Virtual Ship 2 Systems ShipVirtual ControlShip n Signatures External entity B External Rescue entity B systems HLA Run Time Infrastructure External entity A Environment External entity B Environment Threat Simulation Execution Threat Manager Simulation Execution Real Time Manager Visualization Real Time Visualization Common Virtual Range

26 Future challenges Integration of real systems inside the federation Integration of other entities simulators Interaction among different experts Scalability: use in different design/operation steps Human in the loop and ergonomic assessment Distributed WAN connections Security issues

27 Conclusions Simulation is generally used Interoperability and reuse of existing simulations con be achieved using HLA HLA is a promising simulation framework The final users is not yet enough confident in the results as should be Further standardization needed for broader reuse and integration among different organizations Reuse in different life cycle phases (training ) Repository of reusable federates International interest At least we are in good company