Gas Systems Modeling andSimulation with MSC.EASY5：GD Advanced Class Notes（EAS105 Course Notes）

MSC. EASY5 Gas Systems Modeling and Simulation with MSC,EASY5 GD Advanced class notes EAS105 Course Notes September 2006 Modeling and Simulation of Gas Systems with E5"V2005*Z*Z'ZSMEAS105-NT1 MSC, EASY5 -Chart 1 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 1 GD Advanced Class Notes Gas Systems Modeling and Simulation with MSC.EASY5 E5*V2005*Z*Z*Z*SM*EAS105-NT1 September 2006 EAS105 Course Notes

Gas Dynamics Class Introduction MSC. EASY5 Goals and Content Goals Appreciate MSCEASY5 as a set of tools to solve hydraulics engineering problems Use many of MSC. EAsY5's capabilities- and not just the familiar ones Look for an MsC EASY5 tool or feature to help with an unusual problem Work with MSC,EASY5, not around it What class is not about How to design valves and pneumatic systems MSC EASY5 mechanics, but some is inevitable Control analysis/design, but some is inevitable It will: Teach you how to use MSC EASY5 to model pneumatic systems and valves Review some fundamentals that are usually not well understood Provide advanced instruction some features of msc easy5 Modeling and Simulation of Gas Systems with MSC, EASY5 -Chart 2 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 2 Gas Dynamics Class Introduction Goals and Content • Goals – Appreciate MSC.EASY5 as a set of tools to solve hydraulics engineering problems – Use many of MSC.EASY5’s capabilities – and not just the familiar ones – Look for an MSC.EASY5 tool or feature to help with an unusual problem – Work with MSC.EASY5, not around it • What class is not about: – How to design valves and pneumatic systems – MSC.EASY5 mechanics, but some is inevitable – Control analysis/design, but some is inevitable • It will: – Teach you how to use MSC.EASY5 to model pneumatic systems and valves – Review some fundamentals that are usually not well understood – Provide advanced instruction some features of MSC.EASY5

MSC. EASY5 Gas dynamics class Introduction Outline of course Content General Theory of Pneumatic Modeling in MSC EASY5 Modeling a Simple Pneumatic Pressure Regulator Practice basic MSC,EASY5 skills Obtain Initial Operating Points Difficulties in Obtaining Steady State Use Steady State to parameterize models Modeling a Flow Control valve Building Valves from Primitive Pneumatic Components Building an Electro pneumatic Pressure Regulator Data tables and the matrix Editor Linear Analysis Modeling and Simulation of Gas Systems with MSC, EASY5 - Chart 3 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 3 Gas Dynamics Class Introduction Outline of Course Content • General Theory of Pneumatic Modeling in MSC.EASY5 • Modeling a Simple Pneumatic Pressure Regulator – Practice basic MSC.EASY5 skills – Obtain Initial Operating Points – Difficulties in Obtaining Steady State – Use Steady State to parameterize models • Modeling a Flow Control Valve – Building Valves from Primitive Pneumatic Components • Building an Electro pneumatic Pressure Regulator – Data Tables and the Matrix Editor • Linear Analysis

MSC. EASY5 Outline of course content Model a Temperature Control System with Heat Exchangers Simulation and numerical integration Library code development Sorting and solving Implicit Loops Modeling and development with discrete components Modeling discontinuities with Switch States Additional topics as interest and time allows including Debugging models How to define and use your own fluid property set Modeling and Simulation of Gas Systems with MSC, EASY5 - Chart 4 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 4 Outline of Course Content • Model a Temperature Control System with Heat Exchangers • Simulation and Numerical Integration • Library Code Development • Sorting and Solving Implicit Loops • Modeling and Development with Discrete Components • Modeling Discontinuities with Switch States • Additional topics as interest and time allows including: – Debugging models – How to define and use your own fluid property set

MSC. EASY5 Overview of Msc EASY5 MSC EASY5 is an engineering tool for analyzing complex systems Can be Electrical, Pneumatic, Hydraulic, Mechanical,. Used for "intermediate"level of detail modeling and analysis More detailed than discrete event or steady state tools Less detailed than finite element tools Models use nonlinear, discontinuous algebraic, differential, and difference equations Models can be built in different ways Use MSC EASY5 general purpose blocks(integrators, saturation, sums,) Use MSC EASY5 libraries for specific application areas Environmental control Thermal-hydraulic a Drive train Vapor cycle s Electric drive Write your own equations in Fortran components Build your own application libraries Modeling and Simulation of Gas Systems with MSC EASY5 - Chart 5 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 5 Overview of MSC.EASY5 • MSC.EASY5 is an engineering tool for analyzing complex systems – Can be Electrical, Pneumatic, Hydraulic, Mechanical,... – Used for “intermediate” level of detail modeling and analysis § More detailed than discrete event or steady state tools § Less detailed than finite element tools – Models use nonlinear, discontinuous algebraic, differential, and difference equations • Models can be built in different ways – Use MSC.EASY5 general purpose blocks (integrators, saturation, sums,...) – Use MSC.EASY5 libraries for specific application areas § Environmental control § Thermal-hydraulic § Drive train § Vapor cycle § Electric drive – Write your own equations in Fortran components – Build your own application libraries

Overview of msc,easy5 MSC. EASY5 Analysis Options Types of Analysis Steady state Find the values the plant would settle out to after an initial transient Simulation-time response How does the plant respond to a command or a disturbance Model linearization Determine the stability of the system For control system design Also for understanding system Frequency response between any to points in model Root locus, Stability margins, Eigenvalue Sensitivity, Power Spectral Density Matrix Algebra tool Controls Design Data Analysis before or after other analyses Use MSC EAsY5 Plotter to visualize results Modeling and Simulation of Gas Systems with MSC. EASY5-Chart 6 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 6 Overview of MSC.EASY5 Analysis Options • Types of Analysis: – Steady State § Find the values the plant would settle out to after an initial transient – Simulation – time response § How does the plant respond to a command or a disturbance – Model Linearization § Determine the stability of the system § For control system design § Also for understanding system – Frequency response between any to points in model – Root locus, Stability margins, Eigenvalue Sensitivity, Power Spectral Density – Matrix Algebra Tool § Controls Design § Data Analysis before or after other analyses • Use MSC.EASY5 Plotter to visualize results

MSC,EASY5 Overview MSC. EASY5 MSC EASY5 is Several Programs Programs you interact with MSC. EASY5 main window Where you construct your model schematic Also used for data entry and controlling analyses Plotter Visualize the results of the analyses con editor Create custom graphic representations for your components Create component on-line documentation Matrix Algebra TOo/(MAT) Programs that run in the"background Model generator Translates your schematic diagram into a Fortran subroutine of model equations called EQMO Analysis/Simulation program Where the actual computation occurs Custom built for each model Library Maintenance and Model Documentation programs Modeling and Simulation of Gas Systems with MSC, EASY5 - Chart 7 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 7 MSC.EASY5 Overview MSC.EASY5 is Several Programs • Programs you interact with – MSC.EASY5 main window § Where you construct your model schematic § Also used for data entry and controlling analyses – Plotter § Visualize the results of the analyses – Icon Editor § Create custom graphic representations for your components § Create component on-line documentation – Matrix Algebra Tool (MAT) • Programs that run in the “background” – Model generator § Translates your schematic diagram into a Fortran subroutine of model equations called EQMO – Analysis/Simulation program § Where the actual computation occurs § Custom built for each model – Library Maintenance and Model Documentation programs

MSC,EASY5 Overview MSC. EASY5 Levels of Dynamic System Simulation Fidelity Physical systems can be simulated at many levels of accuracy. the " level depends on the purpose of the simulation 1. Atomic level -Uses equations from quantum mechanics Purpose: Molecular level effects Applications: Nuclear physics, quantum chemistry, statisical mechanics 2. Continuum (or distributed parameter)-Uses partial differential equations Purpose: Study quantities that vary significantly over the points in a geometric object Applications: Detailed aerodynamics, impact analysis, component(e.g. valve)analysis 3. Macroscopic(or lumped parameter)-Uses ordinary differential equations Purpose: Study quantities that vary in time but can be averaged over spacial components Applications: Flight controls, hydraulic system analysis, electric power system control 4. Systems analysis Uses algebraic equations with time delays Purpose: Study quantities that effectively change value instantaneously at discrete instances of time Applications: Scheduling, communications Each level requires"orders of magnitude more effort than the next highest, but provides more accurate results. MSC EASY5 models dynamic systems at Level 3 (with the occasional 1-Dim Level 2, such as the Method of characteristics pipe) Modeling and Simulation of Gas Systems with MSC. EASY5-Chart 8 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 8 MSC.EASY5 Overview Levels of Dynamic System Simulation Fidelity • Physical systems can be simulated at many levels of accuracy. The “correct” level depends on the purpose of the simulation. 1. Atomic level - Uses equations from quantum mechanics Purpose: Molecular level effects Applications: Nuclear physics, quantum chemistry, statisical mechanics 2. Continuum (or distributed parameter) - Uses partial differential equations Purpose: Study quantities that vary significantly over the points in a geometric object Applications: Detailed aerodynamics, impact analysis, component (e.g. valve) analysis 3. Macroscopic (or lumped parameter) - Uses ordinary differential equations Purpose: Study quantities that vary in time but can be averaged over spacial components Applications: Flight controls, hydraulic system analysis, electric power system control 4. Systems analysis - Uses algebraic equations with time delays Purpose: Study quantities that effectively change value instantaneously at discrete instances of time Applications: Scheduling, communications • Each level requires “orders of magnitude more effort than the next highest, but provides more accurate results. • MSC.EASY5 models dynamic systems at Level 3 (with the occasional 1-Dim Level 2, such as the Method of Characteristics pipe)

MSC. EASY5 Pneumatics Modeling and Simulation with MsC,EAsY5 A Brief Overview of the GD Library Modeling and Simulation of Gas Systems with MSC. EASY5-Chart 9 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 9 Pneumatics Modeling and Simulation With MSC.EASY5 A Brief Overview of the GD Library

MSC. EASY5 GD Library Overview Why is the library called the"Gas Dynamics"Library? · It can be used to model Pneumatic systems Environmental control systems Steam cycles Gas turbines Chemically reacting gas systems Thermal analysis with gases The scope of the library is much wider than"Pneumatics", although pneumatic systems modeling is a primary application It does not model external flows, such as flow around an aircraft wing Modeling and Simulation of Gas Systems with MSCEASY5 -Chart 10 MSC XSOFTWARE

MSC.EASY5  Modeling and Simulation of Gas Systems with MSC.EASY5 - Chart 10 GD Library Overview Why is the library called the “Gas Dynamics” Library? • It can be used to model – Pneumatic systems – Environmental control systems – Steam cycles – Gas turbines – Chemically reacting gas systems – Thermal analysis with gases • The scope of the library is much wider than “Pneumatics” , although pneumatic systems modeling is a primary application • It does not model external flows, such as flow around an aircraft wing