Page 16 - DCAP601_SIMULATION_AND_MODELING

Simulation and Modelling

Notes 1000 FORMAT (l0X, 16H TARGET ESCAPED) STOP
END
(Note that since Fortran does not permit 0 as an index we had to set T = 1 to correspond to t = 0
in the flowchart.)
The output of this program for the specified data is as fol1ows:
CAUGHT AT 10 MTS AND 2.969 KMS

By simulation you are able to make the computer go through the instant-to-instant predictions
for as many instants as you required. This was possible only because we knew the basic process
involved, namely, how the fighter plane behaves at any particular instant. Such knowledge of
the basic process of the system under study is essential for all simulation experiments.
The simple strategy, of fighter redirecting himself toward the bomber at fixed intervals of time,
while the target goes on its predetermined path without making any effort to escape the fighter,
is called pure pursuit. Although in many situations, the strategy used by the fighter (pursuer) is
more sophisticated, this basic approach can be used for any pursuit problem.

1.3 System and its Model

1.3.1 Definitions of Systems and Models

Systems are often visualized or modeled as component blocks that have connections drawn
between them. For example, the illustration below describes the interception of solar radiation
by the Earth. In this system, the Earth and Sun, the parts or component blocks, are represented by
two colored circles of different size. The process of solar emission and the interception of the
Sun’s emitted radiation by the Earth (the connection) is illustrated by the drawn lines.

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