Managing Multipurpose Models in Aerospace M&S Challenges and Experiences Magnus Carlsson, Saab Aeronautics / Linköping University MODPROD 2013 6 th of February 2013, Linköping
Presentation Outline Introduction Uses and users of simulation models Development, V&V, and export of multipurpose simulation models Challenges & Experiences
Presentation Outline Introduction Uses and users of simulation models Development, V&V, and export of multipurpose simulation models Challenges & Experiences
What type of systems?
Aircraft Vehicle Systems Environmental Control System Secondary Power System Electrical Power & Lighting System Escape, Oxygen & Anit-g System Hydraulic System Fuel System Landing Gear & Braking System Provides fundamental capabilities for operating aircrafts Complex systems (H/W & S/W), highly integrated, highly interconnected
What type of models? Main scope is simulation models representing physical systems with or without embedded software H/W: Physical aircraft systems or sub systems, avionics equipment S/W: Control systems, functional monitoring (FM), redundancy management (RM), and built-in test (BIT) Typically dynamic 1-D simulation models (ODE & DAE) Physical systems: Complex models in Dymola (Modelica based M&S tool), simpler models in Simulink Control systems: Simulink
Model-Based System Engineering (MBSE) Information carrier Executable specifications Design by simulation Model Continuous test and V&V Code generation Documention generation
Development V-Model in an MBSE Context Definition M&S VT&VC Flight Testing Verification Integration AC Level Definition M&S VT&VC Rig Testing Subsystem Level Specification Decomposition Implementation Production Acquisition Equipment/SW Level Development Time
Presentation Outline Introduction Uses and users of simulation models Development, V&V, and export of multipurpose simulation models Challenges & Experiences
System safety eng. System eng. Equipment eng. Specification Airframe & equipment installation CAD eng. Model Contact Areas Stress/FEM eng. Load & S/W eng. Specification S/W SYSTEM MODEL stress Developer Development Rig test Simulators Training Test leder Pilots Test eng. Flight test Pilots Test trigs Technicians
The pendulum swing of multipurpose
DIFFERENT KINDS OF SIMULATORS Supports Development Verification & Validation Training (pilot training & technician training) Function in the Loop Simulators Models of aircraft functions in concept status Simulated H/W and concepual System S/W Software in the Loop Simulators (e.g. Mysim, V-Sim, MT) Simulated H/W and System S/W Hardware in the Loop Simulators (e.g. Sysim) H/W used in aircraft and some simulated H/W S/W used in aircraft Test Rigs Selected H/W with S/W present in Rig (Device under Test) Simplified aircraft model
Presentation Outline Introduction Uses and users of simulation models Development, V&V, and export of multipurpose simulation models Challenges & Experiences
Workflow Model-Simulator Gripen Core facilitates model storage, methods, and tools Materiel Group (MG) delivers model to simulators via Gripen Core Simulators deliver simulator-time (internally) and simulators (externally) Two new roles to support model development and integration MGs E.g. Fuel System Fuel model Variant 01 Fuel model Variant 03 Fuel model Variant 02 Delivers model Delivers simulatortime internally Feedback Simulator teams Simulator families Sysim Verification Mysim Developmet MT / VMT Training Test rigs Dev., Ver. Delivers simulators externally Gripen Core Maintains models Supports simulator integration Model Responsible Model Integration Responsible
Methodology for Development, V&V, and Export of Multipurpose Simulation Models Methodology covers all phases from defining intended use to validation and integration in a simulator environment Developed by an interdisciplinary team Focus on usability Relevant examples, templates, and checklists Low amount of text Industrial application examples Public variant available: Saab Aeronautics Handbook for Development of Simulation Models
Methodology for Development, V&V, and Export of Multipurpose Simulation Models Intended Use 1 Specification 2 V&V Plan 3 Development Verification 4 Validation 5 RS Export & Integration... Status Declaration SD The methodology is based on: Software Product Line (SPL) efforts in Gripen Simulators 1 = Output Item RTCA/DO-178B and Model Driven Architecture XYZ = Activity Internal processes and predecessor handbooks = Document XY
Presentation Outline Introduction Uses and users of simulation models Development, V&V, and export of multipurpose simulation models Challenges & Experiences
Challenges & Experiences Apply methodology in daily work training New roles collaboration, teamwork Consistent level of model fidelity Consistent level of model validation Real-time performance of complex simulation models Invest in definition of model intended use Invest in workflow for model updates Application of methodology on models for existing products vs. new products Engineers are more willing to take full responsibility of new models, but also of legacy models when those are updated and reengineered
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