Talk:Inverted pendulum

message: The signs on the first equation (= F) for the cart model of the inverted pendulum is wrong from our calculations. The signs should be reverse on the sine an cosine from after the Lagrangian. Someone please confirm.128.63.18.10 (talk) 18:30, 11 June 2008 (UTC)
thread_title: Equations

message: Vest link is 404.  —Preceding unsigned comment added by 84.255.194.155 (talk) 11:41, 30 November 2010 (UTC)
thread_title: Broken link

message: As of 01/17/2011, the article contained the following sentence relating to rocket stability in the Overview section (included here with parts of the surrounding sentences for reference):
"...cart-pendulum system on a see-saw. The inverted pendulum is related to rocket or missile guidance, where thrust is actuated at the bottom of a tall vehicle. The understanding of..."
The sentence falsely implies that a rocket "with thrust actuated at the bottom" (under the center of gravity) is inherently unstable, like an inverted pendulum.  While not immediately intuitive, in actuality the position of the application of thrust is irrelevant to rocket stability, but rather the relative position of the center of drag (a.k.a. center of pressure) to the center of gravity; the rocket (or any aircraft for that matter) is stable if the center of drag is behind the center of gravity.  This concept is reliably explained at length by a NASA publicationhttp://exploration.grc.nasa.gov/education/rocket/rktstab.html.
I have changed the sentence to: "The inverted pendulum is related to rocket or missile guidance, where the center of gravity is behind the center of drag causing aerodynamic instability."  This new reference also alludes to the fact that many modern large-scale rockets are in fact aerodynamically unstable (but not because of where on the rocket the trust is actuated).  --AeroMech (talk) 06:48, 17 January 2011 (UTC)
thread_title: Aerodynamically unstable

message: I'm surprised there was no mention of this here, so am including it.
*It's also mentioned in Bicycle and motorcycle dynamics#Center of mass location: 
*And the Segway PT apparently uses Silicon Sensing gyros: 
--Trevj (talk) 08:53, 14 September 2011 (UTC)
thread_title:  Broomstick balancing 

message: I'm doing a wikipedia project for an English class.  Our task is to find a wikipedia article that is a stub or start and make significant edits to it.  I am an Applied Physics Undergrad and have done a research project on an inverted pendulum robot.  I am planning on elaborating on the setups in which the equations of motion are shown.  Also, I planning to add a number of examples and variations of an inverted pendulum.  Any feedback would be great.  Feel free to edit or delete anything I add or change...I'm new to wikipedia.  Bradyjs bradyjs (talk) 16:10, 17 April 2012 (UTC)
thread_title:  Significant Editing 

message: It is amazing to me that the metronome is not mentioned in this section. 
It is the most widely known inverted pendulum. 
Anyone want to tackle that?  I would have thought it would be the first thing listed! 
And include in the article the fact that metronomes are uneven in their beating.  That could be explained. 
Thanks.
-r
69.166.30.216 (talk) 10:14, 15 October 2012 (UTC)
replies: text: The metronome probably wasn't mentioned because it isn't, in fact, an inverted pendulum (the centre of gravity being below the pivot point), though it might look that way at first glance. I deleted it from the list just now. 79.73.145.112 (talk) 22:49, 27 July 2016 (UTC)
thread_title:  Examples of inverted pendulums 

message: Substituted at 19:03, 29 April 2016 (UTC)
thread_title: Assessment comment