AH-64E > IHADSS > Flashcards

IHADSS Flashcards

(173 cards)

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1
Q

Purpose of the IHADSS system

A

Establish the crewmember’s line of sight in relation to the Armament Datum Line (ADL)

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2
Q

HMS

A

Helmet Mounted Sight

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3
Q

HMS Subsystems

A

AAIH
SPS
IBRU
ISDU
MTU

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4
Q

What does the HMS provide?

A

Sensor pointing
Weapons pointing

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5
Q

HMD

A

Helmet Mounted Display

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6
Q

HMD Subsystems

A

HDU
ISDU
DDU

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7
Q

What does the HMD provide?

A

Display of symbology and sensory imagery in front of crew member

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8
Q

Electro-optical link to what sensors?

A

PNVS
TADS

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9
Q

MP

A

Mission Processors
-Bus controllers for weapons and sight subsystems

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10
Q

IHADSS

A

Integrated Helmet and Display Sight System

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11
Q

AAIH

A

Apache Aviator Integrated Helmet
-Provides audio headset for Comms (not part of IHADSS)

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12
Q

HDU

A

Helmet Display Unit
-Provides crew with NVS imagery for night flight

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13
Q

What happens after crew members LOS has been established?

A

continuous head positioning provided to the MP

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14
Q

IMRU

A

Improved Electro-Magnetic Receiver Unit
-Used with bobbins to detect helmet position

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15
Q

Bobbins

A

Spindle or cylinder on which wire is wound

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16
Q

SDC

A

Signal Data converter

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17
Q

MTU

A

Magnetic Transmitter Unit

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18
Q

Bobbins receives the ______produced by MTU and sends it to the SDC

A

H-Field
(Magnetic Field)

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19
Q

SDC converts signal to ______

A

Digital and sends to ISDU

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20
Q

What side is the Bobbins on?

A

Left

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21
Q

Three dimensions measured by MTU?

A

X, Y, and Z, both E field (RF) and H field (Magnetic)

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22
Q

Where is the MTU located in both crew stations?

A

Mounted over their left shoulder

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23
Q

Red Area? (Motion Box)

A

Above shoulder line on left side of cockpit, don’t introduce metal objects.

Metal could introduce LOS errors

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24
Q

Green Area? (Motion Box)

A

Below shoulder line, can introduce hand-size metal objects

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25
When does motion box mapping take place?
-A/C production -Major changes to cockpit
26
What happens if crewmember's helmet is outside the motion box?
The IMRU can no longer detect the EM signals transmitted by MTU (head positions are lost)
27
How big of a radius should be clear around bobbin?
2"
28
What is the main electronics controller for the HMD/HMS?
ISDU (integrated sight display unit)
29
ISDU
integrated sight display unit
30
What is stored by the ISDU?
Mapping data (MCD) for both stations
31
Where is the ISDU mounted?
In the EFAB
32
What is verified by the MP (mission processor) on every IHADSS power up initialization?
IBRU boresight data (stored in the ISDU)
33
IBRU
Improved Boresight Reticle Unit -Electro-optical device that provides a reference for the crewmember to align the IHADSS to the ADL (Armament Datum Line)
34
ADL
Armament Datum Line
35
Acquisition window degree for IBRU?
5-degree
36
What color will the IBRU be to the naked eye?
Yellow-white
37
What color with the IBRU be through the HDU lens?
Reddish-orange
38
What knob adjust the IBRU brightness?
PRI INT LT knob
39
SPS
Seat Position Sensor
40
MCD
Magnetic Correction Data
41
How many MCDs per crewstation?
-Lower -Upper
42
What establishes the crewmembers LOS in reference to the helicopter ADL?
HMS
43
Why is the crewmember LOS provided to the MP?
sensor pointing, symbol generation, ranging, and weapons aiming
44
IHDU
Improved Helmet Display Unit
45
What does the IHDU do?
Electro-optical (monocular) device that displays video and symbology input from DDU into the right eye
46
What field of view (FOV) does the IHDU give?
30x40 degrees FOV
47
What provides custom adjustment for the IHDU?
Combiner lens
48
What is projected onto the combiner lens?
video image
49
Where does the IHDU receive the operational power?
DDU (Display Driver Unit)
50
Two adjustments for IHDU?
Image level Image focus
51
CRT
Cathode Ray Tube
52
Image rotational collar
used to level the display
53
Infinity focus collar
moves CRT closer and further
54
DDU
Display Driver Unit
55
What is the video processor for the HDU (Helmet Display Unit)?
DDU (Display Driver Unit)
56
What performs the BRT and CON adjustments?
DDU (display driver unit)
57
The IHADSS consist of what two subsytems?
HMD HMS
58
What sighting component does the AAIH interface with for LOS calculation?
ISDU
59
What component make up the HMD subsystem?
HDU ISDU DDU
60
Which component creates the symbology viewed by the crewmember?
MP
61
Where is the Improved Helmet Display Unit (IHDU) stowed?
HDU storage is on the right console
62
What does the IHDU cable assembly connect to?
DDU
63
How should the IHDU cable assembly NOT be routed?
Should not be routed under the crewmember's right arm
64
What is the purpose of the IHDU combiner lens sliding clip?
Allows the crewmember to position the combiner lens directly in front of their eye
65
Where is the IHDU stored?
Right console holster
66
What does the "?" in the HAD sight selection field mean?
Not connected (IBIT) or tail number is entered
67
Do not route the IHADDS HDU cable under which arm?
Right arm
68
Where is the Improved Helmet Display Unit (HDU) stowed?
HDU storage is on the right console
69
What does the IHDU cable assembly connect to?
DDU
70
How should the IHDU cable assembly NOT be routed?
Under the crewmember's right arm
71
What is the purpose of the IHDU combiner lens sliding clip?
Allows crewmembers to position the combiner lens directly in front of their eye
72
What powers the IHADSS system automatically when the aircraft is being powered?
Auxiliary Power Unit (APU)
73
IHADSS is sensitive to___
EM waves
74
What causes the IHADSS enable button to be barriered?
No valid tail number entered, or IHADSS cannot determine the crew station map to use
75
What page can system operation or initialization be verified?
Weapon Utility page (WPN UTIL)
76
What performs the display brightness calibration?
DDU (Display Driver Unit)
77
DDU
Display Driver Unit
78
What message displays during brightness calibration?
High Action Display (HAD) message in the sight status field
79
HAD
High Action Display
80
ADL (Armament Data Line)
An imaginary reference line extending through the longitudinal axis of the aircraft at 0 degrees azimuth, and 0 degrees elevation.
81
WPN Page grayscale option
CPG-cannot adjust controls on grayscale due to barrier Pilot- Cannot adjust the VIDEO panel for 1-minute
82
______Primary bus controller for the sights and weapons systems
MP (mission processor)
83
The MP (mission processor) processes the crew member's LOS for: (4 things)
-Sensor pointing -Symbol generation -Ranging -Weapons aiming
84
What interprets the crewmember head movement?
ISDU (integrated sight display unit) which then sends to MP
85
ISDU
Integrated Sight Display Unit
86
Size/position lines are used for
To ensure 30x40 degrees FOV (field of view)
87
4 vertical centerlines and one horizontal 1 horizontal line (Raster Lines) are used for___
To establish the correct focus for individual crewmember's visual acuity
88
Two grayscale areas display ______ shades of gray. This is used for____
10 shades of gray Establishes proper brightness and contrast for FLIR image to the combiner lens
89
FLIR
Forward Looking Infrared
90
If the crew member's HDU is out of focus, what should it be adjusted to?
Focus ring on the aft portion of HDU should be adjusted to infinity focus
91
What is the video processor for the IDU and where is it located?
DDU (Display Driver Unit), located behind each crew member's seat
92
What does the DDU perform?
Brightness and Contrast adjustments
93
Where is the IHADSS size and center controls located on the DMS (Data Management System) page?
DMS-->Maint--->Maint ?---->IHADSS
94
Any loss of symbology after proper sizing is due to?
-Improper helmet fit -Improper service loop on cables -Display position -Combiner extension -Wearing of eyeglasses
95
Does the canopy have to be closed for boresight procedures?
yes
96
Three points define the crew member's LOS when bore sighting___
-Seat position -HDU reticle -IBRU target ISDU calculates LOS
97
Where is the GRAYSCALE option/selected?
On the WPN page
98
How many shades of gray are displayed when the gray scale has been optimized correctly?
10
99
Which two adjustments are made on the IHDU itself?
Focusing and leveling
100
What are the two most important things to remember when performing the infinity focus check?
1. Do no focus the eye on the center raster lines but rather on the object at least 200 ft away 2. Focus the center raster lines to what the relaxed eye perceives as focused
101
Why is it important to perform the infinity focus check correctly?
Improper focus may lead to eyestrain, headache, and reduced performance
102
What is the aircraft Armament Datum Line (ADL)?
Armament Datum Lins is the imaginary 0 degree azimuth, 0 degree elevation line that runes parallel to the longitudinal axis of the aircraft
103
What system can be bore sighted from the PLT WPN BORESIGHT page?
IHADSS
104
What system can be bore sighted from the CPG's WPN BORESIGHT page?
IHADSS and TADS
105
Crew member's boresight their IHADSS to the________________________________
Armament Datum Line
106
Flight symbology
Cruise Transition Hover
107
When does CPG display flight?
When sight selected is HMD
108
Lubber Line
Reference for both heading and angle of bank
109
VSI
Vertical Speed Indicator
110
What is provided by the skid/slip ball indicator?
Amount of side acceleration and how well a turn is coordinated
111
What are the three selectable symbology modes available in both crew stations?
Cruise Transition Hover
112
What does the field of regard box represent?
Total gimbal limits for the sensor/sight (PNVS or TADS) selected in that crewstation
113
What does the head tracker symbol represent?
Indicates the angular difference between the aircraft centerline and the crew member's LOS (Nose of the aircraft relative to the crew member's LOS)
114
The velocity vector saturates (Fully extends) in Transition Mode symbology at what ground speed?
60KTS ground speed
115
HAD
High action display
116
What are the HAD message areas?
Sight Status Sight select status Range/Range source Weapon Inhibit HMD Format Owner Cue Weapon Control Acquisition Select Status Weapon Status
117
What does the "L" following the selected sight message indicate?
The crew member has the FCR, TADS, or UAV operating in a linked mode.
118
HMS provides continuous LOS information for___
Sensor pointing Weapons aiming
119
MP provide ______ within the crew members HDU
Symbol generation
120
What is the primary purpose of the IHADSS?
To establish crew member electronic line of sight relative to the ADL (Armament Datum Line)
121
HDU provides crew members with _____
NVS imagery for night flight
122
How many ISDU (Sight Display Unit) per aircraft?
1
123
ISDU (Sight Display Unit) send to what?
MP (Mission processor)
124
What is stored in the MTU (Magnetic Transmitter Unit)?
Part Number Serial Number Operational Time
125
What is motion box mapping?
Theoretical rectangular box that represents the available range of motion at which IMRU detects the RF/EM fields transmitted by MTU
126
IMRU
Improved Magnetic Receiver Unit
127
IHADSS LOSS INVALID
Aircraft cannot detect HMD or helmet Displayed within the HAD (High action display)
128
Motion Box error
Helmet extended close to edge of motion box
128
IHADS boresight required error
AAIH (Helmet) requires bore sighting
129
The _____ decides which ______ to use based on the SPS feedback
ISDU (Sight Display Unit) MCD (Magnetic Correction Data)
130
The _____ establishes the crew member LOS in reference to the helicopter ______ to align ______ & ________
HMS (Helmet mounted sight) ADL (Armament Datum Line) weapons & Sensors
131
IHADSS TEMP ORIDE bypasses_____
100 celsius shutdown protection
132
When is crew notification of IHADSS over temp condition? CAUTION: IHADSS HOT
92 Celsius
133
What is the purpose of the IHDU combiner lens sliding clip?
Allows the crew member to position the combiner lens directly in front of their eye
134
Front knob on IHDU purpose?
Rotation
135
Rear knob
Infinity Focus
136
How does PLT station change GRAYSCALE?
Video Panel
137
Outside lines on GRAYSCALE
Size/Position lines
138
4 flashing cueing dots means what?
B/S required
139
Flight symbology
Cruise Transition Hover
140
Heading scale is in what increments?
10 degree
141
When will heading scale or the lubber line not be displayed?
EGI information is not valid or EGI has failed
142
What symbol is the Command Heading?
^, indicates next navigation waypoint
143
TSD
Tactical Situation Display
144
Heading miscompare cue
"beetle-beetle" heading differs by more than 4 degrees detected by EGI
145
Attitude Miscompare Cue
Attitude differs by more than 3 degrees
146
Velocity Miscompare Cue
Miscompare difference exceeds 10 degrees
147
Alternate sensor bearing
Alternate crew member's selected LOS
148
ADF
Automatic Direction Finder
149
When will altitude low audio play?
10% below the LO set altitude
150
Above alt ____ LO is ___ FT
999 100
151
Radar altitude is presented where?
Analog tape in the center right area of page (beside VSI)
152
What is the Radar Altitude displayed in?
-One ft increments (0-50 AGL) -10 ft increments (above 50 ft AGL) *No tape above 200
153
Altitude hold symbol?
Home plate symbol
154
When is the skid/slip ball not presented?
If inertial acceleration is not available (EGI data not available)
155
FOR
Field of Regard (Big rectangular box)
156
FOV
Field of View (smaller rectangular box)
157
Valid range for airspeed digital readout ____
210 KTAS
158
Flashing torque means what ____
Greater than 12% split between engines
159
When is engine TGT shown?
-Final 2 min of a 30 min or 10 min limit -Entire 2.5 min of single engine contingency power
160
When is G status shown?
-Aircraft is within .25G of current acceleration limit -Aircraft exceeds .3G to 2G normal operating region
161
LOS reticle represents _______
LOS when sight is HMD or TADS and for WPNs aiming Reference for B/S, head tracker, horizon line, velocity vector acceleration cue, and hover position box
162
When does LOS reticle flash?
-When LOS in invalid -Sensor at limit (PNVS, TADS) -Gun actioned with the gun failed (Not following head)
163
Acceleration cue _____
Magnitude and direction, indicates the intended direction and rate the aircraft is moving
164
Velocity vector (long line lollipop) shows what
Direction of movement -Hover mode 6 knots GS -Transition mode 60 knots GS
165
Head tracker
Virtual position of the head's LOS relative to centerline of aircraft
166
TRC
Translational Rate Command When in hold modes, the computer will allow the pilot to move cyclic to regain position <2kts, >5kts arch will go away
167
BOB-UP box is how big
12 ft sq 40 ft (laterally and longitudinally)
168
FPV
Flight Path Vector- Aircraft flight path on current control settings Difference between head tracker and FPV
169
Total range of Digital Barometric Altitude
-2300 to 20000ft in 10ft increments
170
Where does the bank angle turn white and at what exceedance?
MPD, and after 20 degrees banking
171
Velocity vector speed at hover?
6 KTS
172
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