MIL-HDBK-1211(MI)
Figure 1-2. Spectrum of Methods for Determining Missile Performance
available. New simulations are developed as the need arises.
tube (CRT) displays of the lines of instruction are readily
There is a relatively small core of individuals who have the
available to simulation users and programmers to be used in
knowledge and experience to maintain these simulations and
analyses and to understand what the simulation does. Inputs
to develop new ones. Scattered documentation exists on var-
or changes to the simulation are easily made by typing them
ious aspects of missile simulation, and most simulations
into the computer using a keyboard.
have some form of documentation that describes them.
Some hybrid simulations are basically digital but use ana-
Many of the pragmatic techniques used to produce the de-
log computers with analog-to-digital (A/D) converters to
sired results within the limitations of COSt, time, and current
generate certain simulated functions. Typically, `hybrids are
hardware, however, exist only in the minds of the specialists
used in applications that require the outputs in real time and
in this field.
in which the simulated functions contain high-frequency
The objective of this handbook is to document methods of
spectral components that would be difficult or impossible to
missile fright simulation to preserve current knowledge and
produce with current digital equipment alone.
to provide a consolidated source of information. Specifical-
The need for real-time computation is usually the result of
ly, the purposes of this handbook are to (1) present the fun-
using actual missile hardware in the simulation, which, of
damental elements, equations, and techniques necessary to
course, must run in real time (Refs. 2, 3, and 4). In this case
develop missile flight simulations, (2) describe the typical
the physical simulation consists of lines of instruction for the
computational equipment used for missile flight simulation
digital portion, wired patchboards for the analog portion, and
and the specialized equipment used to generate the target
the actual hardware components (the seeker, for example).
scene, and (3) present the methodology for certifying that a
The equipment needed to run a hybrid simulation that in-
missile flight simulation provides an accurate representation
cludes actual seeker hardware is a digital computer, an ana-
of missile performance.
log computer, and a seeker scene generator. Less complex
The intended users of this handbook are (1) Army design
simulations may require only a digital computer.
engineers with many years of experience, (2) recently grad-
1-2 PURPOSE OF THE HANDBOOK
uated engineers with limited knowledge of the principles of
missile simulation, (3) specialists in particular fields of
Many Government agencies and contractors use missile
Army materiel design with superficial knowledge in the field
flight simulations. These simulations are continually being
of missile simulation, and (4) engineers employed by con-
revised and improved as user needs change, as missile de-
tractors.
signs change, and as better simulation hardware becomes
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