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FCS + TURRET COMPONENTS Flashcards

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1
Q

TYPE OF AHS FOR MAIN GUN

A

The XM1304 AHS is a link-less, closed-loop, dual-feed system with two selectable feed paths

High-capacity, 162-round asymentric design
Right feeder (B): 80 rounds
Left Feeder (A): 82 rounds

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2
Q

TYPE OF ARMOR ON TURRET

A

4MM RHA

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3
Q

M240 CAPACITY AND RANGES

A

400 RDS 7.62

900 MER

1800 MR

500 RPM

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4
Q

XM813 TR/EL

A

360 TRAVERS

-10 +43 RELATIVE TO ROOF

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5
Q

ARMAMENT COMPONENTS

A

XM813
AHS
M240
AHS
LTM
SGL

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6
Q

TURRET COMPONENTS

A

Observation System
-SL-Elecro Optical Sight
System
-VC-Elecro Optical Sight
System
Meteorological Sensor
Servo Power Unit (SPU)
Gun Control Unit (GCU)
Fire Control Unit (FCU)
Elevation Resolver

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7
Q

COMMAND AND CONTROL COMPONANTS

A

Squad Leader Handle (SLH)

Vehicle Commander Handle (VCH)

Vehicle Command Panel (VCP)

(VDET)

VC Display Unit (VCDU)

Main Computer Unit(MCU)

High Power Supply Unit (HPSU)

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8
Q

LOADING ZONE STATS

A

5RD AT A TIME

LZ TILTED 20 DEGREES TO ALLOW GRAVITY TO ASSIST

INTERNAL LOADING ENABLED

14MM HEX SOCKET TO ADVANCE ROUNDS

CAN BE LOADED 1RD AT A TIME THRU THE GIU

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9
Q

LEFT SIDE AND RIGHT SIDE CAPACITIES

A

L: 82RNDS
R: 80RNDS

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10
Q

HOW DOES THE AHS WORK?

A

Cradles each round from the taper point to the rim and provides axial control

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11
Q

AHS LOAD ZONE KEY PARTS

A

-Flexible chute
-Rigid chute
-Element cradle
-Feed mech
-GUI
-Loading Door

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12
Q

WHAT DRIVES THE AHS

A

The GIU drives the AHS and controls the hand-off of rounds between the AHS and the XM813.

1.5HP gun motor drives the cannon which in turn drives to GIU

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13
Q

ERROR BUDGET LIST

A

-Initial boresight error

-Boresight retention

-Lay target center (tracking accuracy)

-Trunnion cant

-Target altitude

-Sight resolution

-Lead prediction

-Stabilization

-Computer accuracies

-Jump variation

-Ammunition dispersion

-Range change

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14
Q

MOST COMMON CAUSES OF ERROR

A

Inability to identify the center of the target.

Inability to properly lay the reticle onto the center of the target.

Firing too quickly due to the criticality of time.

Optical path bending.

Parallax.

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15
Q

WHAT ERROR OCCURS WITH TRUNION TILT?

A

A LINE ERROR, GUN IS ELEVATED OBLIQUELY INSTEAD OF VERTIALLY

IT WILL ALSO AFFECT THE AMOUNT OF QUADRANT ELEVATION APPLIED TO THE VERT AXIS

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16
Q

FACTORS THAT MAY CAUSE DISPERSION

A

CROSSWINDS

THERMAL BENDING

LOT NUMBERS

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17
Q

WHERE IS THE FCU LOCATED? WHAT IS IT RESPONSIBLE FOR?

A

INSIDE TURRET

INTERFACING WITH THE WEAPON SYSTEMS FOR SENDING FIRING COMMANDS AND REC GUN DATA SUCH AS ROUNDS FIRED AND LOGIC STATE RESULTS

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18
Q

WHAT IS GUN DATA AND GUN INDICATORS?

A

GUN DATA:
-BITresults
-number of rounds fired

GUN INDICATORS:
-Sear status
-gun ready
-gun fail
-ammunition feed selection
-gun armed
-breech lock

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19
Q

WHAT CONTROLLERS AND EQPT DOES THE FCU INTERFACE WITH TO OPERATE THE MG COAX?

A
  • Firing solenoid – sends firing command to enable M240 electrical firing
  • Sends 28V power to motor in conveyor assembly for operation
  • Round counter – receives number of rounds fired, supplies 28V power
  • Cocking assembly – receives data from front and back proximity sensors for controlling cocking cycle sends movement commands of cocking actuator to enable electrical cocking, supplies 28V power
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20
Q

The 30x173mm XM813 Bushmaster™ Chain Gun incorporates what features?

A

-Linkless Dual Feed Assembly

  • Dual Recoil
  • Integral Mount
  • 22 VDC, 1.5 HP Motor
  • Single Shot, Burst, & Full Rate @ 200 SPM
  • Air Burst Munition (ABM) Compatible
  • Manual Safety Control with Safety Switch
  • Anti-hangfire safety
  • Closed-Bolt, Open-Bolt, & Semi-Closed Bolt Gun Modes

-40mm compatible (with upgrade)

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21
Q

MAJOR COMPONENTS OF XM813

A
  • Cannon (Consists of Feeder, Receiver, Barrel, & Shroud Assemblies)
  • Gun Control Unit (GCU)
  • GCU to Gun Cable Assembly

-BII

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22
Q

DESCRIBE THE WEAPON CRADLE

A

Cannon mounts to vehicle using aluminum pws cradle

mounted to turrest base by twin stanchions

Stanchions provide stable elevation and driven by Elevation Actuator housed under cannon

Stanchions mount to base plate on vehicle roof thru BEARING RING provides azimuth mvmnt

BEARING RING driven by trav actuator house right side turret base

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23
Q

COAX COMPONENTS

Study These Flashcards
A

Feed Chute
-Guides rounds from
ammo box to feed tray

M240 Machine Gun

Round Counter
-Records the amount of
rounds fired by sensing
recoil movement

Ejection Chute
-Guides casings to
casing collectors

Cradle
-Holds the MG, firing mechanism, and cocking mechanism. The MG cradle is located on the weapon station (WS) fork and is subject to itselevation(EL) and traverse (TR) movement

Collection Box
-Collects ammunition links and cartridges ejected from the MG

Firing Mechanism
-Electronically controlled by the Vehicle Commander Handle (VCH). It includes a solenoid which mechanically pulls the firing trigger

Ammunition Box
-Holds up to 400 rounds of 7.62mm ammunition

24
Q

DESCRIBE THE LASER TARGET MARKING (LTM)

Study These Flashcards
A

The LTM incorporates a Visible and Covert/IR laser

Alignment precision <0.5mRad between lasers

VIS LASER
-Wavelength: 635nm ± 20nm.
-Beam divergence: <0.5 mRad
-Output power: up to 80 mW ± 15% (Class 3B)

IR LASER
-Wavelength: 830nm ± 10nm
-Beam divergence: <0.5mRad.
-Output power: up to 80 mW ± 15% , Laser Class 3B

25
WHAT IS THE GCU USED FOR?
It interfaces with the FCU The GCU is used to electrically communicate controls and commands to the PWS As well as store gun data and statuses.
26
WHAT DOES THE GCU INTERFACE WITH THE FCU FOR?
* Receiving 28V for operation * Enabling/disabling gun firing * Receiving ammunition feeding command according to user selection (upper feed/lower feed) * Receiving firing rate command according to user selection (single, burst, or full) * Sending gun BIT results, number of fired rounds * Sending gun indications (sear, gun ready, gun fail, ammunition feed selection, gun armed, breech lock) * Receiving ABM programming data * Sending commands to gun (arm, firing, fire rate, feed selection) and receiving gun indications and data (BIT results, number of fired rounds)
27
WHAT IS THE MOTION & DRIVE CONTROL UNIT (MDCU) USED FOR?
The MDCU is responsible for controlling the turret mvmnt and stabilization.
28
WHAT DOES THE MOTION & DRIVE CONTROL UNIT INTERFACE WITH THE SLIP RING FOR?
* Sending video from primary optics, secondary optics, and boresight device * Sending status (open/closed hatch, gun armed, machine gun cocked), BIT results and data (e.g., gun position, number of rounds, weapon system position) from various units in the weapon system * Receiving various commands (e.g., commander sight shield movement, weapon system movement, gun/machine gun/Smoke Grenade Launcher (SGL) fire, gun/machine gun/SGL arm, machine gun cocking, sight tracking)
29
The MDCU interfaces with primary and secondary optics for?
* Receiving day and thermal video signal * Sending movement commands in elevation * Receiving BIT results and range measurement from Laser Range Finder (LRF) * Receiving data from proximity sensors to determine when sights are in 0° angle in traverse axis
30
MDCU interfaces with secondary optics sight shield for?
* Sending movement commands in traverse * Interfacing with meteorology station for receiving data (wind, outside temperature, relative humidity, internal barometric pressure)
31
MDCU interfaces with traverse and elevation actuators for?
* Receiving temperature data from temperature sensor * Receiving velocity data (from actuator tachometer) * Sending control commands to actuator brake assembly * Interfacing with elevation resolver for receiving position data to determine the gun elevation angle * Sending reference signals to elevation resolver measurement process * Receives data from elevation zero sensor to indicate when the gun is in 0° elevation angle
32
DESCRIBE THE GUN GYROSCOPE
BLUF: Uses Quapason gyros for pitch and roll info of the gun The gun gyroscope uses two rugged, single-axis solid state vibrating rate gyroscopes to provide low signal-to-noise ratio and exceptional bias stability performance. Uses Quapason™ sensors, which are highly robust resonating gyroscopes that are compact and provide superior noise performance and exceptional Allan variance **The gun gyroscope interfaces with the MDCU to send movement and stabilization data and with the HPSU to receive electrical power (18V to 32V, less than 5W).**
33
DESRIBE THE BASE GYROSCOPE
Uses a Microelectromechanical System (MEMS) gyro to provide pitch and roll info of the chassis **The base gyroscope interfaces with the MDCU to send movement and stabilization data and with the HPSU to receive electrical power (18V to 32V, less than 0.5W)**
34
Describe the MET sensor
The meteorological sensor measures wind speed, wind direction, barometric pressure, ambient air temperature, relative humidity, direction, and (GPS) localization. Uses thermal field variation sensor to calcualte wind speed and direction **It interfaces with the High Power Supply Unit (HPSU) to receive electrical power (18V to 32V, less than 25W).**
35
What is the LRFs Beam DIvergence?
< 0.55 mrad
36
What kind of zoon for TIM?
Continuous optical and electronic zoom -NFOV: 2° -WFOV: 7.4 ° -Additional WFOV: 27.4 °
37
VIM preset FOVs
-Additional NFOV: 0.8 ° -Narrow FOV: 2° -Wide FOV: 7.4 ° -Additional Wide FOV: 30 ° Continuous optical and electronic zoom
38
Describe the Elevation Actuator
The elevation actuator supplies the required torque and angular speed to drive the weapon systems cradle has PROXIMITY SENSOR to knwo when it is at 0 degress elevation Has brakes for when when motor not enganged If the actuator loses power, the brakes will hold the cradle in its last position
39
Describe the Traverse Actuator
The traverse actuator supplies the required torque and angular speed to drive the turret. The Traverse Actuator measures its movement based off of 0° (separate from the FCS) in order to know where “home” is. Receives power from SPU and commands from the MDCU.
40
Describe the Traverse Resolver
Housed in Slip Ring Assy measures absolute angle of the wpn in traverse Resolver is linked to stationary section of of slip ring BUT shaft is linked to rotating section can be accessed thru removable cover without dismantling other parts
41
Describe the Elevation Resolver
Located inside the right Stanchion Used to measure the absolute angle of the weapon system in elevation Interfaces with the MDCU to provide this data, which is shown on the CDU as a graphic icon.
42
Describe the Slip Ring
Slip ring for all software and data interfacing between the turret and vehicle The slip ring is in the center of the turret base plate assembly Cannot be accessed from the outside This ensures that all hardware connection ports are kept behind secure access, are not visible from outside of the vehicle, and have physical safeguards.
43
Where is the Main Computer Unit ( MCU) located?
VC Workstation
44
Describe what the Main Computer Unit (MCU) does
Receives commands from the VCH, VCP, SLH, VCDU, and SLDU Receives video and statuses from the MDCU and FCU and sends commands Produces graphics, text, and messages that display on the VCDU and SLDU Performs ballistic calculations System manager (system logical state machine) Low power supply for controls, UI, and display Fire control software and algorithms (ballistic tables LOS/LOF corrections) Video server, image processor, image/display distributor Platform interface controller: battery management system application, vehicle characteristics (e.g., speed, hatches
45
Describe the Hight Power Supply Unit (HPSU)
Powered by a 24VDC vehicle power supply HPSU distributes power throughout the turret and FCS The HPSU draws from the vehicle 24VDC output and distributes the power directly to the base gyroscope, MCU, VCP, and hatch sensors, and indirectly to the GCU, FCU, and MDCU through the slip ring.
46
What are the 3 categories the HPSU groups for power distribution?
Low Power Components High Power Components GCU and XM813 Cannon
47
Describe the VC Station
The VC station controls consist of the VCH and VCP The VCH and VCP together give the VC control of the main safety features of the system Such as drive, fire, and override; the system operative mode; the primary and secondary optics; t he primary and secondary weapon system; and the smoke grenade launchers.
48
VCH- Modes of Control
Shooter: VC-EOSS and armament are tied together and controlled by VCH. -STAB and SERV mode available. -SLH is in control of SL-EOSS Observe: VCH Controls SL-EOSS -SLH has no control but can view on the SLDU (VDET). Enslave: VCH controls the armament and the SL-EOSS. -SLH has no control but can view on the SLDU (VDET). -Once Enslave is selected, the system will default to STAB mode.
49
SERVO (SRV) Mode of OP
Used mainly for stationary target engagements, administrative runs, and maintenance activities. VC controls the weapons stations mounts velocity and horizontal and vertical movement by using the thumb joystick and holding the Brake release switch (BRS).
50
STAB Mode of OP
Used to perform accurate firing while the vehicle and/or target is moving. -The BRS is deactivated allowing the operator to steer the system freely -Moves the system independently in two ways. *During vehicle movement, to keep the line of sight (LOS) and line of fire (LOF) stabilized. *During Tracking, to keep the aiming reticle on the target.
51
GO TO Mode of OP
The weapon station is set to move to a predefined position. Movement, firing and steering are disabled
52
GO TO 3 Positions
Home: System defined (El 0° and AZ 0°) Gun Load: Operator Configured Coax Load: Operator Configured In go-to mode, the system mode of operation is changed automatically to SRV mode. Pressing and holding the BRS is required until the turret reaches the predefined position.
53
Describe ATT (automatic target tracking)
Only avail in STAB Mode 4 blue squares when enabled
54
HPSU Controls and Idicators
Power Indicator (Green/Red) Indication Lamp (Green/Red) CONT Switch Enables power to MDCU, MCU and FCU electronics DRV Switch Enables power to SPU GCU Switch Enables power to GCU and FCU Power Switch Enables power to weapon station components
55
Vehicle Commander Handle (VCH) Joystick buttons
Steering Joystick Manual Range LRF Firing Trigger w/ Guard Brake Release Switch (BRS) Track Firing Corrections
56
Vehicle Commander Handle (VCH) Controls and Indicators
Fire Enable switch Fire enable Indicator (green) Drive Enable Switch Drive Enable Indicator (green) Override Switch Override indicator (red) Illumination LEDs Track Video Source (DVE, etc.) Polarity Shooter Control Shooter Control Indicators (green) DIMM (for illumination and indicators) Zoom / Focus Video Source (Day / Night)
57
Squad Leader Handle (SLH)
Zoom / Focus Steering joystick Polarity Up- toggles Day Sight to IR Down – Toggles FLIR between BH and WH Track LRF Auto Focus

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