Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
2015JAT/JAT/src/jat/application/AttitudeSimulator/help/Simple3DFlexSC.html
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
69 lines (65 sloc)
3.49 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> | |
| <html> | |
| <head> | |
| <title>Simple 3D Flexible Spacecraft</title> | |
| <meta http-equiv="content-type" content="text/html; charset=Shift_JIS"> | |
| </head> | |
| <body> | |
| <div align="center"> <img src="Simple3DFlexSC.GIF" alt="Title" | |
| width="544" height="64"> | |
| <div align="left"><b><u>Simulation Control</u></b><br> | |
| <b>time step</b>: Time step for the numerical integration routine<br> | |
| <b>time</b>: Duration of the simulation periond in seconds<br> | |
| <br> | |
| <b><u>Description</u></b><br> | |
| A flexible spacecraft is modeled as a central rigid body with two massless | |
| beams<br> | |
| attachd symmetrically to the side of the central body. Each beam has a | |
| <br> | |
| concentrated mass at the tip. The flexibility comes from the flexural | |
| rigidity EI of <br> | |
| the beams. Although the flexible elements are constrained to move in 1-2 | |
| plane<br> | |
| only, the applet is able to simulate the effect of flexibility on the | |
| spacecraft <br> | |
| attitude in three dimensional space.<br> | |
| <img src="Flexible202D.GIF" | |
| alt="2D Flexible Spacecraft Illustration" width="540" height="424"> | |
| <br> | |
| <b><u>Inputs</u></b><br> | |
| <b>Ixx, Iyy, Izz</b>:             Principal moments if inertia<br> | |
| <b>m</b>:                            Tip mass (kg)<br> | |
| <b>a</b>:                             Distance as | |
| indicated in the illustration (m)<br> | |
| <b>L</b>:                             Length of the | |
| beam as illustrated (m)<br> | |
| <b>EI</b>:                             Flexural rigidity | |
| (N m2)<br> | |
| <br> | |
| <b><u>Initial Condition</u></b><br> | |
| <b>u1</b>:                         Position of the | |
| first mass<br> | |
| <b>u2</b>:                         Position of the | |
| second mass<br> | |
| <b>psi, theta, phi</b>:         Euler angles in a sequence of 3-2-1<br> | |
| <b>u1Dot</b>:                     Velocity of the first | |
| mass<br> | |
| <b>u2Dot</b>:                     Velocity of the second | |
| mass<br> | |
| <b>psiDot</b>:                     Time rate of psi angle<br> | |
| <b>thetaDot</b> :                 Time rate of theta angle<br> | |
| <b>phiDot</b>:                     Time rate of phi angle<br> | |
| <br> | |
| <br> | |
| <br> | |
| <h4><br> | |
| </h4> | |
| <br> | |
| </div> | |
| <br> | |
| </div> | |
| <br> | |
| <br> | |
| <br> | |
| </body> | |
| </html> |