 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-63536(AR)
3. REQUIREMENTS
3.1 Item definition. The logic control unit (LCU) as defined by Drawing
11830922 shall be configured for use in an AH-IS helicopter equipped with
XM97E1 20 mm Armament Subsystem. The control is a totally enclosed box that
contains the required circuitry to translate signals from the aircraft Into
appropriate signals for turrent subsystem control and safe weapon firing
sequences. The following functions shall be performed by the LCU:
a. Convert resolver signals into appropriate inputs for the air
craft Stabilization Control Augmentation System (SCAS) and also provide a
control signal to enable the SCAS.
b. Sense an out-of-coincidence. condition between the turrent and
sighting station and also provide the necessary signals to drive the turrent
back in alignment with the sighting station.
c. Sense an angular difference (in azimuth or elevation) between the
turrent and sighting station in excess of 1.5 degrees and provide a gun firing
interrupt signal until the turrent and sight are in alignment.
d. Limit the down elevation travel of the turret subsystem to 4.5
degrees while the system is in the ground mode and to provide a logic signal
indicating this condition.
e. Provide gun firing interrupt whenever +18 volts direct current
(Vdc) or -18 Vdc is not supplied externally.
f. Provide +15 Vdc, -15 Vdc, +5 Vdc to supply the electronics
contained within the LCU.
g. Provide the system with a 28 Vdc signal indicating that the 20MM
Armament Subsystem is selected on the LCU control switch.
3.1.1 Major components list. The major components shall be as specified
in Table I.
TABLE I. Major component list.
Drawing
Ref. Des.
Component
--
11830531
Case
11830441
A1
Component Assembly,
Power Supply and SCAS
3
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals