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

Chapter 11 / Future Research
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• Implement Li’s robust IMM formulation that avoids bounding the filter
transition probabilities and assess its benefits for typical target trajectories.
• Investigate the IMM re-initialisation rate when using high frequency
measurement to establish the time it takes for the dynamic characteristics of
a particular filter to emerge.
• Active set maintenance is proposed linked to generic types, reducing the
computational load by using EKF incremental updates proposed by Hanlon.
• Explore Bootstrap and Particle filter formulations that combine individual
filter outputs whilst preserving covariance higher order moments that are
crudely approximated by the IMM using a Gaussian distribution.
• Establish filter probability thresholds for identify the start and end of target
manoeuvres, and if possible discriminate between the type of manoeuvre.
11.4 Missile State Observation
• Assess if computing a covariance correction to account for non-optimal
quaternion state normalisation is justified.
• Quantify the destabilising effect of treating high frequency IMM track data
as measurements, and at what up-link rate can the correlation be ignored.
• Assess the robustness of IMM filter probabilities as manoeuvre detectors for
conventional guidance enhancements and pseudo-measurement control.
• Quantify the residual error levels in the missile IMU sensors after a ground
calibration subject to launcher rotation and vibration.
11.5 Trajectory Optimisation
• Compare the trajectories produced by each element of the cost function with
analytic results, and the baseline results presented in §9.
• Quantify increases in target capture regions.
• Investigate convergence rates for alternative algorithms.
• Assess convergence rates as a function of processor load.
• Assess optimiser stability as characterised noise on the boundary conditions
increases.
• Explore cost function combinations that prevent optimiser convergence and
if such conflicts can be avoided by cost weight re-balancing, or by making
the weights trajectory dependent.
11.6 Weapon System Simulation
Consider the future of the simulation created during this research and the
AMIS spawned from it. The author hopes to develop the AMIS as a
research tool that shares models with the simulators described here to create
a combined pre- and post launch facility.
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