Cockpit Assembly Team
Victor Calamaro,
Nick Flanagan,
Rashaud Harvey,
Danielle Painter
Customer Needs
 Instrument the existing throttle lever with position
transducers
 Maintain control mechanisms such as pilot interface
handles, range of motion and feel
 Instrument the existing rudder pedals with
displacement and force transducers
 Maintain control mechanisms such as pilot interface
pedals, range of motion and feel
 Instrument the existing yoke with displacement (axial
and rotational) and force transducers
 Maintain control mechanisms such as pilot interface
grips, range of motion and feel
 Enable feedback from all transducers (force, spring
rate and drag)
Customer Needs (cont.)
 Install LCD monitor in front of each pilot station (2)
 Implement an emergency stop function in multiple locations that
will allow a given simulation to reset if one operation fails
 Two wire (signal and return) cable
 Two emergency stop switches located at each pilot station
 Two switches made available for ground personnel
 Clear labeling of switch function
 Pull to operate, push to stop Install cabling from all transducers
and monitors to the ground Interface connector for easy
disconnect/replacement Rout cabling to ventilation tube and wire
way conduit Provide a minimum of 10ft cabling beyond conduit
exit Install mounting system for side stick inceptor. Design elbow
and wrist assembly for pilot comfort
Engineering Specifications
 Rudder sensor must output a position signal from 0 to 5 V
 Throttle sensor must output a position signal from 0 to 5 V
 Yoke sensors must output a position and rotation signal





from 0 to 5 V
All controls provide X lbf feedback
Monitors are mounted in cockpit (yes/no measurement)
Emergency stop resets simulation (yes/no measurement)
All cabling is able to reach computer system (yes/no
measurement)
Items in italics need to be determined
Overview
 Yoke Drawback
 Yoke Rotation
 Throttle
 LCD Display
 Rudder Pedals
Pugh Matrix Weighting
 Ease of Maintenance
 How easy is it to get to the sensor if there is problems?
 Importance - Medium
 Accuracy
 How close does the sensor measure position?
 Importance - High
 Ease of Installation
 How easy is it to mount the sensor?
 Importance - High
 Durability
 How often will the sensor need to be replaced?
 Importance - Medium
 Cost
 How much does the sensor and associated signal conditioning
cost?
 Importance - Low
Yoke Drawback – Sensor Type
 LVDT
 Type dependent on mounting location
 Most reliable, most expensive
 Encoder
 Similar in cost, still reliable
 Quadrature Output
 String Potentiometer
 Type dependent on mounting location
 Cheap, will wear out
Yoke Drawback – Mounting Location
 Connected to yoke shaft itself
 Most direct -> could be most accurate
 Complex geometry causes problems
 Attached to cable
 Simplest
 Least direct -> chance for cables to slip etc ->
chance for lower accuracy
Yoke Drawback – Signal Conditioning
 LVDT
 Requires an expensive signal conditioning board to
output 0 to 5V
 Board produced by Moog
 Analog board can be made
 Encoder
 Requires a less expensive signal conditioning board
to output 0 to 5V
 String Potentiometer
 No conditioning necessary
Yoke Drawback – Pugh Matrix
Yoke Rotation – Sensor Type
 RVDT/LVDT
 Type dependent on mounting location
 Most reliable, most expensive
 Encoder
 Less expensive, still reliable
 Quadrature Output
 Rotational/String Potentiometer
 Type dependent on mounting location
 Cheap, will wear out
Yoke Rotation – Mounting Location
 On yoke itself
 Most direct -> could be most accurate
 Complex geometry causes problems
 On Pulley for cables
 Less direct -> slightly less accurate then on the
yoke
 Easier to mount then on yoke
 Attached to cable
 Simplest
 Least direct -> chance for cables to slip etc ->
chance for lower accuracy
On Yoke
On Pulley
Attached to Cables
Yoke Rotation – Signal Conditioning
 RVDT/LVDT
 Requires an expensive signal conditioning board to
output 0 to 5V
 Board produced by Moog
 Analog board can be made
 Encoder
 Requires a less expensive signal conditioning board
to output 0 to 5V
 Rotational/String Potentiometer
 No conditioning necessary
Yoke Rotation – Pugh Matrix
12241-Cockpit Assembly
Yoke-Rotation
Concepts
Selection Criteria
Weight
Ease of Maintenance
Accuracy
Ease of Installation
Durability
Cost
0.20
0.25
0.25
0.20
0.10
Net Score
Rank
Continue?
1.00
A
B
C
D
E
LVDT on Cables
RVDT on Pulley
String Potentiometer on
Cables
Encoder on Shaft
Encoder on Pulley
5
3
4
5
3
1.00
0.75
1.00
1.00
0.30
4.05
3
5
4
4
5
3
1.00
1.00
1.00
1.00
0.30
4.30
1
YES
5
1
5
3
5
1.00
0.25
1.25
0.60
0.50
3.60
4
3
5
1
5
4
0.60
1.25
0.25
1.00
0.40
3.50
5
5
4
3
5
4
1.00
1.00
0.75
1.00
0.40
4.15
2
Throttle- Sensor Technology
 Encoder
 Easy installation
 Durable
 LVDT
 Requires Signaling Board
 Accurate
 RVDT
 Accurate
 Easy installation
Throttle-Mounting Location
 Between Throttle Levers
 Durable
 Accurate
 Easily accessible
Throttle-Mounting Location
Throttle-Signaling Condition
 RVDT/LVDT
 Requires an expensive signal conditioning board to
output 0 to 5V
 Board produced by Moog
 Analog board can be made
 Encoder
 Requires a less expensive signal conditioning board
to output 0 to 5V
Throttle-Pugh Diagram
12241-Cockpit Assembly
Throttle Sensor
Concepts
Selection Criteria
Weight
Ease of Maintenance
Accuracy
Ease of Installation
Durability
Cost
Net Score
Rank
Continue?
0.15
0.20
0.25
0.25
0.15
1.00
A
B
C
D
Encoder
LVDT
RVDT
Between Throttle Levers
3
4
3
5
2
0.45
0.80
0.75
1.25
0.30
3.55
3
3
4
4
3
4
0.45
0.80
1.00
0.75
0.60
3.60
2
3
5
4
3
4
0.45
1.00
1.00
0.75
0.60
3.80
1
YES
3
4
3
3
1
0.45
0.80
0.75
0.75
0.15
2.90
1
YES
Rudder Pedal-Sensor
 String/Rotational Potentiometer
 Inexpensive
 Wears out
 Encoder
 Durable
 Reliable
 LVDT/RVDT
 Requires Signaling Board
 Expensive
 Accurate
Rudder Pedal-Mounting Location
 Attached to pedal
 Direct
 Accessible
 Cable Connection
 Indirect
 Slip possible
Rudder Pedals
Rudder Pedal-Signaling Condition
 RVDT/LVDT
 Requires an expensive signal conditioning board to
output 0 to 5V
 Board produced by Moog
 Analog board can be made
 Encoder
 Requires a less expensive signal conditioning board
to output 0 to 5V
 String/Rotational Potentiometer
 No conditioning necessary
Rudder Pedal - Pugh Matrix
12241-Cockpit Assembly
Rudde r Pe dals
Se le ction Crite ria
Ease of Maintenance
Accuracy
Ease of Installation
Durability
Cost
Net Score
Rank
Continue?
Conce pts
W e ight
0.20
0.20
0.25
0.20
0.15
1
A
B
C
D
RV DT on
Pe dal Shaft
LV DT on
Cable s
String Pote ntiome te r
on Cable s
E ncode r on Pe dal
Shaft
4
5
4
4
3
0.80
1.00
1.00
0.80
0.45
4.05
1
YE S
4
4
3
4
3
0.80
0.80
0.75
0.80
0.45
3.60
2
4
1
4
2
5
0.80
0.20
1.00
0.40
0.75
3.15
4
4
4
2
5
3
0.80
0.80
0.50
1.00
0.45
3.55
3
LCD Display-Technology
 Flat Panel
 Durable
 Easy Maintenance
 Compact
 Monitor
 Bulky
 Easy Installation
LCD Display-Mounting
 Bolt on Dash
 Easily accessible
 Durable
 Velcro on Dash
 Easily accessible
 Cheap
 Glue on Dash
 Easily accessible
 Easy installation
LCD Display-Mounting Location
LCD Display-Pugh Diagram
12241-Cockpit Assembly
LCD Monitor
Selection Criteria
Weight
Ease of Maintenance
Ease of Installation
Durability
Cost
Net Score
Rank
Continue?
0.20
0.30
0.30
0.20
1.00
A
B
Concepts
C
LCD Flat Panel
LCD Monitor
Bolt
2
3
5
3
0.40
0.90
1.50
0.60
3.40
1
YES
3
2
4
4
0.60
0.60
1.20
0.80
3.20
2
1
3
5
2
0.20
0.90
1.50
0.40
3.00
1
YES
D
E
Velcro
Glue
2
1
3
1
0.40
0.30
0.90
0.20
1.80
2
2
1
2
1
0.40
0.30
0.60
0.20
1.50
3
Risk Management