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Improvements to README similar to those of Orbit sim.

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Penn, John M 047828115 2021-01-06 16:53:00 -06:00
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trick_source/trick_utils/SAIntegrator/examples/MassSpringDamper/README.md
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The MassSpringDamper program uses the SA::EulerCromerIntegrator class to
simulate a forced mass-spring-damper system.
### Initial conditions:
The mass is chosen to be 1 kg. The damping constant is chosen to be 5 Ns/m.
The spring constant is calculated for a frequency of 2 hz. Every 5 seconds,
the system is given an impulse of 500 Newtons for 0.005 seconds.
* mass = 1 kg.
* spring constant = 157.913670 N/m, gives a frequency of 2 hz.
* damping constant = 5 Ns/m.
### Run-time:
Every 5 seconds, the system is given an impulse of 500 Newtons for 0.005 seconds.
After each numerical integration time-step, the simulation program prints
For each numerical integration time-step, the simulation program prints
1. time (s)
2. position (m)
@ -43,3 +37,6 @@ $ python plot_position.py
```
![MSD](images/MSD.png)
### References:
[https://en.wikipedia.org/wiki/Mass-spring-damper_model](https://en.wikipedia.org/wiki/Mass-spring-damper_model)