1. MOOG EMA Installation MSD1 - P12251
Bradley Adriaansen
Brett Adams
Joseph Mazzara
Joshua Coscos
Hussain Alabandi

2. Agenda Project Recap Proposed Design System Connections & Interactions
CAD Model
Structural Analysis
Spring Assembly
Brackets
Spring Cups
Main Block
Spring Shaft
Trunnion Design
Bill of Materials
Demodulation Breadboard
Demodulation PCB
dSPACE
Updated Risk Assessment
Test Plan
MSD II Schedule
P12251
11/29/2018

3. Project Recap
Use of Electro-Mechanical Actuators (EMA) in place of hydraulic actuators in aircraft applications has received significant attention in recent years due to their lack of supporting hardware, thereby reducing mass, volume, and maintenance.
Benefit is not without risk.
Failure modes associated with current EMAs can often occur without sufficient notice.
To be widely-utilized fault detection and failure prediction methodologies must be an integral part of the Health & Usage Monitoring System (HUMS).
State-of-health prediction in engineering systems is a rapidly evolving field that has a strong application to flight actuation.
Moog controller and LVDT that has been offered for donation to be installed and commissioned at RIT for future flight actuator HUMS research projects.
P12251
11/29/2018

4. Proposed Design Trunnion Redesign EMA-Mounted LVDT
+/-2” Spring Assembly
AD598 Demodulation card
2 power cutoff switches
P12251
11/29/2018

5. System Connections & Interactions
User Input
dSPACE
T200 Controller
EMA Actuates
EMA
LVDT
Spring Assembly
P12251
11/29/2018

6. CAD Model – 0” Displacement
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7. CAD Model + 2” Displacement
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8. CAD Model –2” Displacement
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9. CAD Model – LVDT Mounting
P12251
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10. Structural Analysis – Spring Bracket
Mesh Iterations
Von Misses Stress
Cycles between 0 and ~15,000 psi
Local yielding occurs at stress concentration
P12251
11/29/2018

11. Structural Analysis – Spring Bracket
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12. Structural Analysis – Spring Cup
Spring Cups experience minimal radial and hoop stress.
Maximum Stress is 520 psi in compression.
Cycles between 520 psi and 0 psi
P12251
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13. Structural Analysis – Spring Cup
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14. Structural Analysis – Main Block
Mesh Iterations
Von Misses Stress
Cycles between 6,600 and -6,600 psi
P12251
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15. Structural Analysis – Main Block
P12251
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16. Structural Analysis – Spring Shaft
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17. Structural Analysis – Trunnion
Mesh Iterations
Von Misses Stress
Cycles between 1,200 and -1,200 psi
P12251
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18. Structural Analysis – Trunnion
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19. Bill Of Materials (B.O.M.)
Link to Bill of Materials
Total Cost Estimate: $721.59
P12251
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20. Demodulation Breadboard
P12251
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21. Demodulation PCB Approximate Cost $60.00 for 3 boards
Minimum of 3 boards ordered
2 PCB fit on each card
6 demodulation boards total
P12251
11/29/2018

22. dSPACE Read in analog data from LVDT
Convert LVDT Voltage to inch measurement
Graph position vs time
Future: Use position measurement to control EMA actuation speed
P12251
11/29/2018

23. Revisited Risk Assessment
P12251
11/29/2018

24. The following will be tested:
Test Plan
The following will be tested:
Spring Assembly
Force applied by passive load at 0” deflection
Force applied by passive load at +2” deflection
Force applied by passive load at -2” deflection
LVDT
Supply Voltage for LVDT
LVDT Output
EMA
Allowable base movement for test fixture
EMA range of motion
Required power phase for controller
Supply voltage for controller
T200 Controller control of EMA
P12251
11/29/2018

25. MSD II Schedule Tentative MSDII Schedule
Project Completion Mid-Late April
P12251
11/29/2018