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|  MIL-C-18244A(WEP)
The flight tests shall prove that the equipment will satisfactorily stabilize and/or automatically con-
trol the aircraft through its airspeed and altitude range. When the automatic flight control or
stabilization system is integrated with other systems such as fire control, automatic navigation,
ground controlled bombing, etc., the flight tests shall demonstrate the adequacy of the AFCS in
performing its function as part of the integrated system.
4.7
Failures and Retests - Component failing a service condition test shall not be
resubmitted for test without furnishing complete information on the corrective action taken subsequent
to the failure. This information shall be furnished to the procuring activity or in the test report,
depending upon location of testing. Depending upon the nature of the failure encountered and correc-
tive action required and at the option of the procuring activity, the rework or modifications accom-
plished shall also be incorporated into the other test samples. Where rework or modification may
be considered as sufficient to affect performance under the other service condition tests already
completed, at the option of the procuring activity, these tests shall be repeated in the specified order.
Higher Category of Service Application - Components to be used under a particu-
4.8
lar category of service application, which have previously been subjected to and accepted under the
requirements of a lower, or less severe, category of service application, either as an individual
component or as a component of the same or a different system shall be subjected to a rerun of those
service condition tests which vary with category of service application.
4.9
Instrumentation - During the conductance of dynamic performance test, sufficient
instrumentation shall be provided to record all input and output quantities fundamental to the function
or basic design concept of the systems or components operation. All instrumentation used shall be
accurately calibrated prior to and at the completion of all tests. In addition, ambient conditions,
power supplied, voltage and frequency variations shall be noted, or recorded, as the nature of the
test may warrant.
4.10
Special Test Equipment - Special test equipment used shall be accurately
calibrated. Calibration data or curves shall be included in the test report or shall accompany the
test equipment when submitted tO the procuring activity for conductance of tests.
4.11
Test Technique - Dynamic performance of systems and components shall be
demonstrated by using transient response or frequency response testing techniques, or both.
Physical Characteristics of Transients - Applied transients shall be step or ramp
4.11.1
functions in displacement, rate of displacement, or other suitable inputs.
Application of Transients - Where feasible, transients shall be applied physically
4.11.2
to inertial sensing elements by actual displacement or rotation of the unit. Electrical inputs, such
as command inputs, as well as other types of inputs shall be applied in any convenient manner, such
as rotation of a signal generator, switching or use of an electronic integrator.
4.11.3
Variation of Transient Amplitudes and Rates - A sufficient number of displacement
transients of different amplitudes as well as rate of displacement transients of different rates shall be
applied to the system or component under test to adequately define its dynamics in the region of
threshold, linear operation, saturation, and velocity limit.
Variation of Gain - For those systems or components in which loop gains maybe
4.11.4
varied, either automatically or manually, the dynamic tests shall be accomplished over a sufficient
number of gain settings to adequately define the systems or components dymanics throughout the
obtainable range of gain variation.
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