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Profile-Based Filter for Maneuvering Missiles

IP.com Disclosure Number: IPCOM000111816D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Hansen, NH: AUTHOR [+2]

Abstract

This profile-based filter estimates the three dimensional position and velocity for maneuvering missiles from two dimensional observations. Maneuvering missiles are missiles that can change pitch and yaw after the first stage. The filter requires that the general class of missile be known, and for that missile class, the thrust acceleration magnitude and the first stage downrange and altitude position profile be known. The missile thrust acceleration direction is not required.

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Profile-Based Filter for Maneuvering Missiles

      This profile-based filter estimates the three dimensional
position and velocity for maneuvering missiles from two dimensional
observations.  Maneuvering missiles are missiles that can change
pitch and yaw after the first stage.  The filter requires that the
general class of missile be known, and for that missile class, the
thrust acceleration magnitude and the first stage downrange and
altitude position profile be known.  The missile thrust acceleration
direction is not required.

      The filter has five states:  three, Phase time or the time
between the first observation of the missile and the missile launch,
the missile heading, and the missile loft relate to the first stage
of the missile, and two, Missile yaw and pitch, relate to the second
and following stages.  An initial estimate of each state and a
confidence level for each of the estimates is required by the filter.

      For maneuvering missiles, it is assumed that the yaw and pitch
make one discrete change usually at the end of the first stage and
remain constant after that.  (Other maneuvers are approximated by the
single maneuver in the filter.)  Another assumption in the filter is
that the thrust acceleration magnitude is independent of the yaw and
pitch maneuvers.  The filter models the missile by placing the first
stage profile at a location, phase time, heading, and loft based upon
the first observation and the filter states.  The m...