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

Chapter 8 / Simulation
_ _
The complexity of modern missiles is radically altering the role of
simulation. Historically, relatively simple simulations were required for
proof of principle, and limited provision of performance data. This would
be undertaken during a development phase lasting perhaps 6-8 years
encompassing HWIL testing, captive carry data analysis and live firing
telemetry. Today’s weapons have operational capacities beyond the
available funds to support live firing proof of performance. Thus simulation
has become an indispensable tool for design proving aimed at reducing
program development to 4-5 years, and for supporting weapon qualification.
Simulations validated against HWIL and a limited number of flight trials are
now Contract deliverable items, their results being used to support
certification over the entire flight envelope.
MISSILE REFERENCED GENERIC SENSOR MODULES
WITH MANUFACTURERS OR MISSILE SPECIFIC
DATA PACKS
PRE-LAUNCH
TARGETTING
MODERN INTERACTIVE WINDOWS I/O AND CONTROL
CONCENTRATING ON A USER FRIENDLY ENVIRONMENT
GEODETIC
REFERENCED
MISSILE MODULES
ANALOGUE
& 1553 LINKS
GEODETIC
REFERENCED LAND,
SEA AIR LAUNCHERS
LAUNCHER REFERENCED GENERIC SENSOR
MODULES WITH MANUFACTURER OR LAUNCHER
SPECIFIC DATA PACKS
8-4
FREE FLIGHT
MISSILE
MODULES
LAND, SEA
AIR LAUNCHER
MODULES
POST-LAUNCH GUIDANCE
MULTIPLE RELATIVE
AND GEODETIC
TARGET MODULES
WITH TERRAIN
REFERENCING
Figure 8-1 : Integrated Simulation Concept
Post-launch 6 DoF missile simulations, with little or no interaction with the
launcher, tend to dominate during the bid and development stages of a
weapon system. The increase in pre-launch functionality, and in-flight
guidance of air-launched missiles, demands more of today’s simulations.
Although the two phases of an engagement still tend to be treated in
isolation, the time is fast approaching when the pre-launch simulation will
be the tool of choice containing a free-flight phase. This reversal of
dominance is being driven by the TFA of medium and long-range missiles,
rear hemisphere targeting of short-range air-to-air missiles, and launcher flyout
models allied to fire control solutions. Figure 8-1 captures the essence
of this role reversal with pre and post launch phases contained within a
single entity. The digital and analogue data links between the launcher and
missile being modelled so that the ability to transmit digital messages to the
missile once launched is retained.