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

Chapter 1 / Introduction
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aspect and jamming avoidance. These research areas are captured in Figure
1-1. The research focuses on providing a basis for work on providing stable
boundary conditions from the state observers for on-line guidance solutions
that are capable of reacting to changing environmental conditions and
different target scenarios free of the curse of dimensionality and large
databases.
1.2.2 Devolved Objectives
Key components when designing modern missile systems are:
• Target capability, decoy and evasion tactics
• Reliable sensors providing sufficient data for state and parameter estimation
depending on the guidance law to be employed with the accuracy needed to
meet target kill probability requirements.
• State observation employing all the available sensor data to provide optimal
estimates for fire control and in-flight missile guidance.
• Missile airframe and aerodynamic characteristics allowing the autopilot to
maintaining a stable configuration whilst meeting the guidance demands.
• Weapon system simulation for design proving and software verification.
Since the mid-1950s these have been, and remain, fruitful areas for research;
the cumulative body of information available in the public domain is
staggering. Never-the-less, literature on these topics will be assessed,
techniques down-selected and, where necessary, developed for this
application using a unifying nomenclature created for the purpose. The
following secondary objectives will be observed:
• Create a target simulator for providing idealised and complex target
trajectories by merging elemental dynamic components, particularly
avoidance manoeuvres. Although this work is to concentrate on targets in
the air-defence theatre it should briefly consider the provision of trajectories
with respect to a moving reference for air-to-air scenarios. Multiple-target
provision, terrain following, the application of constraints for the purpose of
target selection within a sensors Field-of-View (FoV) are to be explored.
• Select sensors that will shape future development of missile systems and
their launchers. Create a simulator supporting system level models of these
sensors in which typical errors are superimposed on reference data. The
models are to be transportable, capable of cloning for use in both missile
and launcher, and duplicated as required for multi-spectral devices.
• Create a target-tracking simulator for studying multiple-model algorithms
containing individual filters. The structure should allow for the introduction
of additional filters, different formulations of a particular type of filter and
the extraction of commonly used performance metrics.
1-4