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|  MIL-G-46858A
3.5.4.8 Pre-programming units. - When the flight control subsystem employs pre-
programming units to provide sequential, programmed control over the missile's
operation or flight path, these units shall accomplish this in one or more of the
following ways:
a. Generating command signals
b. Modifying command signals
c. Mode selection of processing units
d. Modifying processing unit characteristics.
The characteristics of pre-programming units shall conform to the requirements of the
detailed specification.
3.5.4.9 Actuators. - The flight control subsystem shall have actuators which, when
functioning in conjunction with suitable linkages, shall be capable of correctly
operating the missile's control devices in response to signals from the flight control
subsystem processing units. When accessory units are employed to aid in the
operation of the actuators, the actuator input and any actuator feedback output must be
compatible with the processing units. The actuator output may be either rotary or
translational depending on which method is best suited to operate the control devices
in conjunction with suitable linkages. Furthermore, the actuator output shall meet
specified requirements for limits of travel and available output force or torque so as to
adequately operate control devices during the execution of specified maneuvers.
Actuators, linkages, and actuator accessory units, when required, shall be approved by
the procuring activity.
3.5.4.9.1 Electric Actuators. - When the flight control subsystem employs electric
actuators to operate missile control devices, they shall not exceed the electrical power
limitations established in the detailed specification for actuator operation.
Furthermore, the actuator response shall comply with the design values and tolerances
of the related parameters established in the detailed specification. These parameters
shall include but not be limited to the following:
a. Actuator gain
b. Characteristic time
3.5.4.9.2 Pneumatic and hydraulic actuators. - When the flight control subsystem
employs pneumatic or hydraulic actuators to operate missile control devices, they shall
not exceed the pneumatic or hydraulic source limitations established in the detailed
specification for actuator operation. Furthermore, the actuator response shall comply
with the design values and tolerances of the related parameters established in the
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