Thesis - Leigh Moody.pdf - Bad Request - Cranfield University

Chapter 2 / Target Modelling
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may respond in this way to radar illumination and missile launch performing
bang-bang manoeuvres at the optimal switching times. The simulator
should provide an elemental model based on this theory to facilitate 2-player
guidance solutions.
This discussion concludes by exploring some alternative target models, in
the main directed at air-launched munitions, some of which are potentially
applicable to the current simulator:
• One important field of research is the re-creation of dynamics from a
vehicle’s position with respect to the earth and its body referenced
dynamics. Generally, splines are fitted through way-points in LGA to
obtain PVAJ linear dynamics, orientation and angular body rate. Although
route generation is normally the province of long-range navigation, terrain
following targets are useful for studying low-level target designation in a
highly dynamic environment.
• Air-to-air engagements are often easier to simulate when target dynamics
are defined with respect to the moving launcher. One of the most flexible
approaches to this problem is to provide a target reference frame, located in
the launcher, whose position with respect to launcher fixed axes is defined
by some angular dynamic. The target is then constrained to move linearly
along the x-axis of the target reference frame. This has obvious applications
to air-launched scenarios in which the launcher is fixed and idealised polar
dynamics are provided.
• The current target simulator provides a single target, and of course such
targets can be cloned. However, consider a further extension to the previous
model. The position of the single target becomes the location of a bi-normal
plane to the target reference x-axis. The motion of multiple targets is then
defined in this plane. The target are easily constrained to the FoV of
sensors, within association gates, and to specific positions with respect to
sensor sight-lines to test target selection algorithms and critical loci.
These target scenarios have been developed for the AMIS. They are useful
for creating idealised scenarios when dealing with relative motion, reducing
highly complex motions to simpler cases amenable to analysis.
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