dead-reckoning การใช้

• Doppler-sonar is a dead-reckoning system .
• Interpolation between satellite positions was initially carried out by dead-reckoning procedures .
• Fundamentally an inertial navigation system is a dead-reckoning system with a very significant characteristic which differentiates it from more conventional dead-reckoning equipment .
• Adri automatic dead - reckoning instrument
• This article pays attention to make use of curve matching to correct the distance error of dead - reckoning . matching algorithm improved by woleson is dependent on redrawing characteristic point and corresponding relation
• The main tasks of this thesis are : discussing the dead - reckoning theory of doppler velocity log and compass , decreasing location error methods , emulating several ship tracks ; discussing several aspects influencing the velocity precision of doppler velocity log ; in a pool trial , processing the trial data and achieving some conclusions
• In the management of city transportation , navigation of satellite cannot meet the practical requirement because of shielding and interfering of satellite signal . therefore , map matching and dead - reckoning ( dr ) is used to assistant navigation . this combination is defined as gps / dr integrated navigation system , in which the map matching is used for correcting the orientation and distance errors of dr
• In this paper , the main research works are as follows : 1 ) survey and analysis previous work in auv navigation and summarize : as the cumulate error , the dead - reckoning and inertial navigation systems ca n ' t be used without other modified system ; the acoustic navigation system is used only in small range , and is very expensive . 2 ) two important approaches in geophysical navigation techniques are summarized , one is terrain contour based navigation , this approach is investigated keystone today ; the other is image based navigation , due to no perfect image sensors and image seabed map , this approach has seldom been practised . 3 ) two important terrain contour based navigation algorithms has been applied to auv , one is match algorithm - based terrain contour match ( tercom ) ; the other is kalman filter - based sandia inertia terrain - aided navigation ( sitan )
• For reducing dead - reckoning location error of doppler velocity log and compass , this thesis studies two methods , exponential flatness arithmetic and common flatness , gives the emulating results in the different tracks , proves that lawnmower is a efficient method of decreasing location error
• Presents the perception mechanism of virtual humans based on a dead - reckoning algorithm to overcome the drawback of the synthetic vision approach , promotes the study of perception techniques in behavioral animation , and lays the foundation for the behavior control study for virtual humans , and points out that with the development of behavioral animation in more than one decade , researchers have been more and more convinced of the importance of the behavior study for virtual humans ; perception mechanism is the core of the above study ; the perception mechanism for virtual humans has been generally founded by the sensory approach , not by the synthetic vision approach because the complexity of virtual human itself and the dynamic quality of environments make it difficult to transmit visual information between virtual humans in multi virtual human environment like a virtual war field