Talk:Inertial navigation system

message: I think the methodology section is very confusing and in it's current form does not add much to the conversation. The diagram is very confusing and unclear exactly what method is being modeled (possibly an information filter?). I think the section should be changed to incorporate some other types of methods such as a high-level diagram of an EKF with a brief explanation and some brief mention of other methods. Mhigger (talk) 18:53, 3 March 2023 (UTC)
thread_title:  Methodology is confusing 

message: I believe the first gyroscopic guidance systems were developed for underwater torpedos.  I've heard these refered to as Obry Units.  The Soviets built a boost-glide cruise missile in 1936 that had a gyroscopic guidance system, and of course so did the German V-1 several years later.  I believe Goddard had a patent very early in the century for gyroscopic autopilots for airplanes.  The idea of putting a gyroscopic guidance sytsem in a rocket was probably first devised by Goddard, he certainly flew a rocket with one in 1932 and probably thought of it many years before that. DonPMitchell (talk) 05:42, 4 August 2008 (UTC)
thread_title:  History Needs Work 

message: "the vector cross product (v, xdv, /dt)" - should this be written as (v × dv/dt) instead? Bungo77 (talk) 08:07, 28 May 2009 (UTC)
thread_title:  Tyop for cross-product? 

message: In the introduction it says that it measures velocity without using an external reference. How this can be correct? The velocity of any point of a rigid body respect to a frame that moves with the rigid body is always zero. How can you say that a velocity can be measured without external references? This would mean that a body has an absolute state of motion, which since Galileo, is not considered true.
I am sure the information given is correct but it may be biased by the jargon of the community. Probably the without external reference is something like, respect to the stars or respect to a reference point fixed at ground (like the base or airport), but is assumed known and hence not mentioned.Kakila  —Preceding undated comment added 09:38, 29 September 2009 (UTC)
replies: text: "... without the need for external references" refers to without the need for some kind of external signal (e.g. GPS, VOR, DME). Pure inertial navigation systems measure acceleration and attitude using only onboard inertial sensors. These measurements are integrated to produce velocity and position. No external signals are used. In practice, most systems that use inertial sensors also incorporate external signals. Bottom line - the statement is correct. Dpdannemiller (talk) 03:29, 19 December 2011 (UTC)
thread_title:  No external reference? 

message: Can someone add a section with the above title. This system was introduced by the US Navy in the 1950's and could provide an insight into the decvelopment of IN systems.Petebutt (talk) 20:06, 13 August 2010 (UTC)
thread_title: Ships Inertial Navigation System (SINS)

message: In this paragraph, shouldn't be precised that the twin gyroscopes must rotate in contrary motion in order to cancel precession ?
78.227.102.29 (talk) 12:36, 17 October 2010 (UTC)
replies: text: Added a reference to my  LN-3 Inertial Navigation System  article, which was one of the first (1962) 4-gimbal inertial navigators in a high performance jet. Klu Andre, 24 dec 2010.  — Preceding unsigned comment added by Klu andre (talk • contribs) 08:20, 24 December 2010 (UTC)
thread_title: Gimballed gyrostabilized platforms )

message: DARPA's Microsystems Technology Office( MTO) department is working on a Micro-PNT ("Micro-Technology for Positioning, Navigation and Timing") program to design "TIMU" ("Timing & Inertial Measurement Unit") chips that does absolute position tracking on a single chip without GPS aided navigation.http://www.darpa.mil/Our_Work/MTO/Programs/Micro-Technology_for_Positioning,_Navigation_and_Timing_%28Micro-PNT%29.aspx Micro-Technology for Positioning, Navigation and Timing (Micro-PNT)http://www.darpa.mil/NewsEvents/Releases/2013/04/10.aspx Extreme Miniaturization: Seven Devices, One Chip to Navigate without GPShttp://www.darpa.mil/NewsEvents/Releases/2012/09/20.aspx Microfabrication methods to help navigate a day without GPS
Micro-PNT adds integrates a highly-accurate master timing clockhttp://www.darpa.mil/Our_Work/MTO/Programs/Micro-Technology_Positioning,_Navigation_and_Timing_%28Micro-PNT%29/Clocks.aspx Micro-PNT - Clocks integrated into a IMU (Inertial Measurement Unit) chip, making it a "TIMU" ("Timing & Inertial Measurement Unit") chip. So these TIMU chips for Micro-PNT have integrated 3-axis gyroscope, 3-axis accelerometer, and 3-axis magnetometer, and together with the integrated highly-accurate master timing clock it simultaneous measure the motion tracked and combines that with timing from the synchronized clock, and with sensor fusion it makes a single chip that does absolute position tracking, all without external transmitters/transceivers.http://www.darpa.mil/Our_Work/MTO/Programs/Micro-Technology_for_Positioning,_Navigation_and_Timing_%28Micro-PNT%29.aspx Micro-Technology for Positioning, Navigation and Timing (Micro-PNT)http://www.darpa.mil/NewsEvents/Releases/2013/04/10.aspx Extreme Miniaturization: Seven Devices, One Chip to Navigate without GPS
Somebody over DARPA has gotten very good at copy/pasting this same two paragraphs ALL OVER Wikipedia pages (IMU, inertial navigation, etc.).  If you guys want to promote your work, at least fix the dead links you are plastering everywhere!  — Preceding unsigned comment added by 76.120.124.223 (talk) 06:16, 7 November 2015 (UTC)
thread_title: TIMU (Timing & Inertial Measurement Unit) sensors

message: Methodology is the study of various ways to achieve an end,a method is the way then used.https://en.wikipedia.org/wiki/Methodology AptitudeDesign (talk) 01:57, 20 April 2014 (UTC)
thread_title:  method,not methodology 

message: The section "Error" says that a good system will have an error on the order of 0.6 nautical miles per hour. But since position depends on a double integration over time, the error should have units of miles per hour per hour. The error in velocity should be proportional to time, and the error in position proportional to time squared. (I'm talkin' about systematic error, not random error. If we talk just about random, Gaussian error, then the error in velocity would be proportional to the square root of time, and the error in position proportional to time to the power 3/2.) Eric Kvaalen (talk) 16:29, 28 January 2017 (UTC)
thread_title: Error units

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thread_title:  External links modified 

message: Curious why mobile robots are specifically mentioned in the first section of this article... Also a bit curious as to why there is a citation needed after the list of vehicles that certainly use inertial navigation systems (ships, submarines and aircraft use these systems by nature). Mobile robots seem like a more specialized case and does not seem necessary to be mentioned at all. If no one else has anything to add after a few days I will change the wording in this article. NedTown5000 (talk) 02:44, 29 July 2020 (UTC)
thread_title:  Mobile Robots?