13,212
edits
Wingflexer: Difference between revisions
Jump to navigation
Jump to search
+ Related content, +-Minor fixes
m (wording) |
(+ Related content, +-Minor fixes) |
||
| Line 47: | Line 47: | ||
== Obtaining plausible parameters == | == Obtaining plausible parameters == | ||
To make our model produce a | To make our model produce a convincing dynamic behaviour, you will need to obtain estimates and fine-tune the parameters. | ||
These include the wing mass m_w, the wing stiffness K, the damping D, and a scaling factor z_fac. | These include the wing mass m_w, the wing stiffness K, the damping D, and a scaling factor z_fac. | ||
| Line 76: | Line 76: | ||
Here are some relations: | Here are some relations: | ||
* | * A lower wing mass increases the natural frequency, and weakens the touchdown bounce | ||
* | * A higher stiffness K reduces the deflection and increases the natural frequency | ||
== Enable developer options == | == Enable developer options == | ||
| Line 176: | Line 176: | ||
== Implementation details == | == Implementation details == | ||
The autopilot/Property rules implementation lives in Aircraft/Generic/wingflexer.xml | |||
The ODE x" + ax' + bx + c = 0 is integrated by DampedOsciFilterImplementation in FG/src/autopilot/digitalfilter.cxx. | The ODE x" + ax' + bx + c = 0 is integrated by DampedOsciFilterImplementation in FG/src/autopilot/digitalfilter.cxx. | ||
== TODO == | == TODO == | ||
| Line 188: | Line 184: | ||
* input for fuselage acceleration should rather be acceleration at CG instead of the pilot's location -- is there a property? | * input for fuselage acceleration should rather be acceleration at CG instead of the pilot's location -- is there a property? | ||
* add wingflexer.py (to where?) | * add wingflexer.py (to where?) | ||
== Related content == | |||
=== Wiki articles === | |||
* [[Howto:Implement wing flex]] – An older way to add wing flex | |||
=== Forum topics === | |||
* [http://forum.flightgear.org/viewtopic.php?f=30&t=24699 Wing flex -- spring/damper Nasal module] – Development topic | |||
=== Source code === | |||
* {{fgdata file|Aircraft/Generic/wingflexer.xml}} – [[Autopilot configuration reference|Autopilot/property rule]] part of the implementation | |||
* {{fgdata file|Aircraft/Generic/wingflexer.nas}} – Nasal part of the implementation | |||
[[Category:FlightGear feature]] | [[Category:FlightGear feature]] | ||