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Solid State Morphing Aircraft Team

Solid State Morphing Aircraft Team

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Solid State Morphing Aircraft Team

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  1. Solid State Morphing Aircraft Team Members: James Bird Roger Bounthisane Amber Cook Elaine Gumapas Thoai Nguyen Jeremiah Silvis Progress Report 02/13/2014

  2. Aerodynamics • Wandering Albatross • Common Buzzard • Grey Heron • Cormorant

  3. Geometric Shapes • Rounded Rectangle (Buzzard) • Most simple fabrication shape and theoretical analysis • Elliptic (Grey heron) • Least amount of induced drag • Pointed Tip (Wandering Albatross) • Generates the most lift • Dihedral (Cormorant) • Flies at higher speeds

  4. Wing Characteristics Wing Natural Freq.

  5. Structural =1.86 lb.

  6. Finite Element Model

  7. Electronics/Coding • Creating a signal generator that has variable period and amplitude. • An RC low pass filter will be added to signal to make a smooth the analog signal for the DC-DC boost converter to follow. • Further research for a simpler method of signal generation with analog control is being researched.

  8. Arduino Code sketch_jan31.ino if(pos<0) { dir=1; pos=0; } if(pos>255) { dir=-1; pos=255; } analogWrite(9,pos); delay(time); } /* created by: James Bird last modified: 1/31/14 */ int diff, feedback, time; intdir=1; int count=1; intpos=1; intdiffPot=0; inttimePot=3; intfeedbackPin=5; void setup() { pinMode(9,OUTPUT); Serial.begin(9600); } void loop() { diff=.1*analogRead(diffPot); //0.1*(1023)=MAX of 102 bit step time=.1*analogRead(timePot); //0.1*1023=MAX of 102 ms time delay feedback=analogRead(feedbackPin); pos=pos+dir*diff; //newPos=oldPos+(direction)step

  9. Output Maximum Frequency : 12 Hz Voltage ranges from 0 to 2.60 VDC STEP DELAY PWM A0 A3 Oscilloscope RC FILTER A5

  10. Smart Materials Figure 2: MFC & Substrate Layup Unimorph (1 MFC) Specimens bonded w/ M8507P1 (MFC) A) 1 layer carbon fiber substrate (85x7mm) B) 3 layered carbon fiber substrate (85x7mm) C) 5 layered carbon fiber substrate (85x7mm) D) Re-using Sample B or Sample C to make a bimorph (85x7mm) Piezo Substrate Substrate Piezo Bimorph (2 MFCs) Sample A Table 1: Properties of Fabricated Carbon Fiber Samples Sample B Sample C Figure 1: Carbon Fiber Samples

  11. Current Fabrication • Test runs are in progress of bonding the MFC to the carbon fiber substrateto prevent any imperfections or slippage while being vacuum bagged Figure 4: Component Layup Macro-Fiber Composite Tape Hinges Carbon Fiber Substrate Glue Epoxy Figure 3: MFC & Carbon Fiber

  12. Testing • Apparatus similar to composite testing for a fixed end cantilever beam • Samples will be tested through series of voltage loads from 0 to 1500v • Data collected and analyzed to observe the relationship between strain (having proportional relationship to voltage) and blocking force of the MFC Figure 5: Apparatus Setup Figure 6: Blocking Force Experiment