What is Simulation: Definition and 879 Discussions
A simulation is the imitation of the operation of a real-world process or system over time. Simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process, whereas the simulation represents the evolution of the model over time. Often, computers are used to execute the simulation.
Simulation is used in many contexts, such as simulation of technology for performance tuning or optimizing, safety engineering, testing, training, education, and video games. Simulation is also used with scientific modelling of natural systems or human systems to gain insight into their functioning, as in economics. Simulation can be used to show the eventual real effects of alternative conditions and courses of action. Simulation is also used when the real system cannot be engaged, because it may not be accessible, or it may be dangerous or unacceptable to engage, or it is being designed but not yet built, or it may simply not exist.Key issues in modeling and simulation include the acquisition of valid sources of information about the relevant selection of key characteristics and behaviors used to build the model, the use of simplifying approximations and assumptions within the model, and fidelity and validity of the simulation outcomes. Procedures and protocols for model verification and validation are an ongoing field of academic study, refinement, research and development in simulations technology or practice, particularly in the work of computer simulation.
Can i know how this simulation softwares(like Pspice, Psim, MATLAB simulink) work ? Which methods they use to solve any circuit with non-linear elements ? How can we solve any circuit numerically ?
hi there,
i'm trying to simulate a ETD core http://www.ferroxcube.com/prod/assets/etd29.pdf" transformer using FEMM free software but I'm not getting it...i've done some simulations with pot cores and had no problem with that, using the axissymmetric mode. bue this type of core is not...
Does anyone have any experience using Gregory Snider's 1D Schrodinger/Poisson solver? I'm trying to do some simulations of a quantum well my group is studying, and I'm not sure if I'm doing something wrong or if the code is buggy or if I'm just interpreting the results incorrectly. Here's the...
I've recently been messing around with the ol' Naviar-Strokes equations, creating a fluid simulator with the help of Mr. Jos Stam. I added vorticity confinement, which made for some really beautiful visual effects. I noticed these appeared similar to an accretion disk.
I'd like to model an...
I am doing satellite attitude determination simulation using sun Earth sensors and Gyro modelling .I am using extended kalman filtering for attitude determination.
the sequence of operations I am doing are
% Simulation data
% Spacecraft data
% Gyro data
% Sensor data.
% Control system...
Hey I am trying to create a comsol model to simulate laser forming using comsol. As a starting point I am using the heating with a moving laser tutorial and adapting from there.
The first stage is to model the beam modes. I the tutorial the beam is treated as being infitesimally thin and is...
Homework Statement
So, I'm creating a 2d graphical simulation of orbiting bodies.
Right now I'm just working with 2 bodies, one stationary, but I would hope to extend this program to be able to include any number of moving bodies and have them interact accordingly.
After combing...
I have been reading on these forums for a bit learning about vehicles and their physics. I still have a few questions and do want to clarify some things as well.
I am trying to simulate a vehicle give some basic info you can find online about any car or vehicle. I know Peak HP and the...
Hi guys, this is my first post!
I have to simulate in 2D and 3D the magnetic field produced by two permanent magnets arranged vertically and separated by a distance d. For 2D simulation I used the excellent FEMM, I discovered googling on internet, and I must say we are very pleased with the...
Is anyone willing to test my dragster in SolidWorks or any kind of cfd software? I been looking all over for some kind of CFD to test my dragster but with no luck and I decided to try SolidWorks, which went well until I realized that I my version doesn't have flow simulation. :cry: Can someone...
I hope i posted on the right forum...
I've been considering writing a simple(?) R/C flight simulator for quite some time. After reading about aerodynamics i concluded that a simulation software are bound to make great simplifications, and may only model a subset of the actual physics...
Hello,
I post another topic because my first main problem about the modelisation of scale factor by solving numerically friedmann equations is resolved.
However, It remains one problem, that of the recollapse when integration starts at a early age of the universe.
i have reformulated the...
"Evolving grid" simulation?
I'm not quite sure what to call this problem, but basically, I am trying to solve a puzzle. It works as follows:
There is a 9x9 grid
Each square can either be "on" or "off"
At the beginning of the puzzle, the 9 squares dead center of the grid are "on", the...
I am trying to simulate a 3D particle simulation, where there are a 1000 particles of random x,y,z postn varying area between 2 n 4, and mass... There are different forces acting on each particles, Force due to heat, wind, and gravity, we calc acceleration from that, after which change in...
I have to write a FD expilicit method, for temp dist on 2D plane.
I am trying to mod the 1D solver to 2D solver, the code below is a 1D solver. Any possible suggestions how it can be done? I initially, derived u(i,j+1) for 2D
for in that derivation i,j corresponds to x,y... where as in 1D...
hello, I am an animation student at bournemouth university in England, I am writing a material simulator for my final major project ( some preliminary results http://www.youtube.com/user/jorjpimm ). The final idea is to have elastic, plastic and tearing and breaking material characteristics, all...
I need to convert quaternion (q) to a form that is suitable to show changing attitude of a Satellite. like new x,y,z vectors of a satellite.I don't know the math of quaternions. I am getting updated state using rung -kutta 4 method where state vector x=[q(1:4) wx wy wz a(1:3) b(1:3)].I can...
I am working on sun Earth attitude determination simulation for my satellite in MATLAB using SCT(space craft control toolbox)I have my keplerian elements for my satellite.I have some initial conditions for orbit setting or satellite is known.I need to use RK4 method for quaternion/state...
Cannon and proyectile trajectory with data dislayed in real time. Can adjust mass, drag, friction, elasticity, etc.
Check it out free at:
http://escxsoft.com/FrmPhysica.aspx
hi
does anyone know what kind of simulation software to be used for switching power supplies design. it should be free software available on the net. it may be student version although advanced version will be preferable!
Homework Statement
The bus service operates between points A and B. The buses depart from the terminal station A with headways that follow the negative exponentioal distributiona with parameter 10 trips per hour.
Assume that the characteristics of the system remain the same over time (not...
Hallo friends,
I am doing simulation of compressor process. I have used the following equation to calculate compressor outlet Temperature and mass flow rate.
mass flow rate (m) : flow from compressor map(m3/h)*compressor pressure/(R*Inlet temp*z)
T_outlet :T1+ (head*(kappa-1)/...
Hello this is my first post on the forum, i have very little knowledge in physics and high level mathematics, but for the past few years I've been dabbling with excel on a way to compare and give rough estimates of many facets of engines.
At the moment what I am working on is determining the...
Hello,
I'm new here, and have a confession: I'm not a physicist, merely a games programmer. Please be gentle with me, and speak slowly :smile: The stuff I'm looking into seems to be outside the scope of all of the games programming forums I know of, so I thought I'd try here.
I'm working...
Hi, I'm currently taking a C++ course where we are going to make a project, we are 6 people in our group. We have decided to make a kind of puzzle game, where the goal is to move an object (maybe a ball?) through a room, avoiding obstacles and eventually reaching a goal somewhere in the room...
This is a game called Gran Turismo 5, which is still under development.
10 seconds into the clip, the car drives through some plastic barriers. I find that the barriers are simulated very unrealistically given their reaction to the car, as the force vector modeling appears to be completely...
Hi all. I've been playing around with a simple gravity simulator I wrote in Processing. I have a version that impliments a second degree modified Euler integration scheme on particles in three dimensions. Attached is a screen strip of screen captures showing the first few moments of the...
hi :shy:, well ı am a simple student and ı want to ask a question, if you can answer ı will be very glad...
it is this: I want (very,very,very much:redface:)to be an expert like this person-http://physbam.stanford.edu/~fedkiw/
and ı am trying to learn this program-(http://www.realflow.com/)
but...
~Radioactive decay simulation
Homework Statement
i have modeled a simulation of radioactive decay and am using an exponential model of y = Ae^kx
and I am asking to analyse my model and justify my choice of model.
and points I can discuss are relating the solution to the problem and...
Hi!
I am wondering if anyone here knows of a generic heat engine simulator. I.e. something that can simulate the behavior of reciprocating engines, Stirling engines, and so forth.
The outputs I'm interested in include things like power and efficiency. The input variables that I would play...
Suppose a company has developed a modification for almost all types of tanks such that when the tank is filled with an incoming fluid (which is at a certain pressure), it stores this pressure and uses it to take the fluid out of the tank with pressure, i.e even if the tank is at low altitude it...
I'm currently writing my own physics simulation engine for some practice with physics since I plan on taking it as my major along with computer science and would like to be ahead of the curve. Plus I'm just plain interested in it. I've read through some papers such as...
Dear Friends !
I would really need Your help. I am currently simulating the temporal development of an interface between liquid and gas, by using Comsol Multiphysics.
The problem can be simplified in terms of a rotating central liquid pick up (a small rotating cylinder endowed with an...
referring to:
0:59
factors:
- you are on a 100 meter track
- person A walks towards you
- person A takes a 1 meter step every second
- track grows longer as person A walks
- track grows 1 meter for every 100 meters every second
- after 10 seconds, the walker has taken 10 steps...
Dear Expertor,
I'm just newbie in Comsol program, I have project to simulation the infrared radiation heat for the epoxy. So i would like to know how to specific the infrared lamp in Comsol simulation model. Could you please reccomment some book or some sample file of Comsol.
Thanks...
Hii,
I am an electrical engineer but I feel myself too weak when I try to solve the problem.
I am trying to simulate an artificial experiment which is:
Let's place a gold piece which is about 10x10x10cm. Let's place it to the bottom of a pool and fillet with a liquid with which the...
hi there,
Im currently working with the program nextnano3. It's a really nice program with which you can simulate nanowires, dots etc.
I currently made a sample of an InP nanowire, with 3 sided gates at the bottom of the wire. These don't touch the wire (10nm between them and the wire) on...
Free download flash physics simulation from http://janggeng.blogspot.com"
engine : action script 2.0
file type : swf
available now :Virtual Microscope Simulation, Simple Pendulum Simulation, Mixed Reflection Simulation, Isobaric Simulation and more...
visit me at
http://janggeng.blogspot.com
I would like to simulate a gas--very approximately--in 2 dimensions. The container will be divided into a grid, and instead of keeping track of each molecule of gas individually, I want to let each cell in the grid have a value for the number of particles in that cell, and another couple of...
I want to simulate some "ants" on a computer, as a cellular automaton. I'm not going for realism, but I want to capture the ability of ants to find paths between nests and food sources, using pheremone information (stigmergy), and purely _local_ observations. I've been working on a program for...
Looking for feedback on a simulation I created to show how using a displacement field can be used for simulating gravity on a large and small scale.
http://www.kademco.com/psim/psim.html
Click multiple times to create points of mass. Each point you add "pinches" the field. There are no...
Matlab 2-D Simulation for TLI (Trans Lunar Injection) "Basic Orbital Mechanics"
Hi Everyone,
I have been assigned a project in which I am to program in MATLAB the solution to the 3-body problem, but in 2-D with a couple assumptions.
1) Earth and Moon are stationary.
2) Mass of spaceship...
Hey
Quick question. I am trying to model creap in an FEA or similar package, but what package should i be using and how complex is this?
I am using just a BS Lead Test Piece, which does lead me to ask
- Does anyone know the standard dimensions of a test piece, i was using lead, and can...
hi,
i try to build a simulation of an object in 3d space.
the object is point object with properties like this:
p : current position of an object.
v : current velocity of an object.
f : current force applied on an object.
m : object's mass (1 kg)
dt : time elapsed since previous step...
this is a optically pumped VCSEL rate equation...
##have to write one editor
function dy = qwer(t,y)
dy = zeros(2,1);
h=6.62e-34; %plank's constant
c=3e10; % speed of light
La=42e-7; %active layer thickness
Ap=154e-10; %pumped area
lamda_p=1310e-7; % pump wavelength
eta_abs=...
hi my friends.
i want a flash format file that simulated the stone skipping.(or other format like 3dmax, maya,...).is there anybody help me?
thanks a lot.
ashkan
Trying to simulate leakage current, say from a reverse bias diode or even a dirty PCB. Getting funny results using the current source across the load. Anyone have any ideas. Basic voltage divider fed by CV source and a 1uA forward biased CC source across the VD tap.
By the way, I'm fairly new...