## A 3D Octal Planetary Model – video preview

This is a video preview to an older post. [sociallocker][/sociallocker]Continue Reading

Science, Engineering, Games in Excel & VBA

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2011-06-26

This is a video preview to an older post. [sociallocker][/sociallocker]Continue Reading

2011-06-25

A video preview to an older model. [sociallocker] [/sociallocker]Continue Reading

2011-04-17

This is an older model of planetary motion in 3D containing eight planets. A video preview can be watched here. [sociallocker][/sociallocker]Continue Reading

2011-02-22

In this tutorial, most of the calculations for the numerical simulation a SMD (spring-mas-damper) system will be consolidated into a single formula, the coordinate formula. In this case, in order to calculate the coordinate at the end of a any time step, we will need just the coordinates from the previous two time steps and of course the input parameters (constants). TheseContinue Reading

2011-02-21

This tutorial explains the principles to generating animation for the spring-mass-damper system analyzed in the previous presentations. [sociallocker][/sociallocker] A casual approach to numerical modeling – part #4 – a Spring-Mass-Damper-System – creating the animation by George Lungu – We are trying to generate animation for the system sketched above knowing the deviation from the equilibrium function of time. This deviation isContinue Reading

2011-02-05

Here is the third part of a tutorial in both elementary dynamics and numerical methods. It is written at a basic level and it shows you how to set up a dynamic model for numerical solving of simple differential equations. The dynamic model makes use of an infinite loop, which make the calculations advance in time. Instead of a large tableContinue Reading

2011-02-04

Here is the second part of a tutorial in both elementary dynamics and numerical methods. It is written at a basic level and it shows you how to solve a system of difference equations in an Excel table. It also starts to explain how to animate the model. [sociallocker][/sociallocker] A casual approach to numerical modeling – the Spring-Mass-Damper System – part 2.Continue Reading

2011-02-03

Here is the first part of a casual tutorial in both elementary dynamics and numerical methods. It is written at a very basic level and it shows you how to solve a system of difference equations with a pencil and a paper and perhaps a pocket calculator to speed things up. A casual approach to numerical modeling – the Spring-Mass-Damper-System –Continue Reading

2010-10-08

Here is a 3-body system with 3D graphics. This model works at about 30 frames/second in Excel 2003 on a modern PC. In Excel 2007 it will run 10-15 times slower. I know 2010 is a lot faster than 2007. I need to add few more features. I am also thinking of adding a 3D gravitational surface map later (likeContinue Reading

2010-09-28

This is the model of a triple spring-mass-damper system in excel. [sociallocker][/sociallocker]Continue Reading

2010-09-28

This is an animated model of a double spring-mass-damper system in excel. [sociallocker][/sociallocker]Continue Reading

2010-09-28

This is the model of a simple spring-mass-damper system in excel. [sociallocker][/sociallocker]Continue Reading