BIRDIE: Biologically-Inspired low Reynolds number Dynamic

Report
BIRDIE:
Biologically-Inspired low Reynolds
number Dynamic Imagery Experiment
Critical Design Review
Jeff Baxter
Jeff Silverthorn
Matt Snelling
Courtney Terrell
Blake Vanier
2015/7/7
Keith Wayman
Briefing Overview and Content
 System Architecture
 Design Elements
 Mechanical Design Elements
 Electrical Design Elements
 Software Design Elements
 Integration Plan
 Verification and Test Plan
 Project Management Plan
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System Architecture
 Overview of Objectives
 Motivation
 Overview of Requirements
 Goals
 System Design
 Analysis
 Visualization Experiment Results
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Overview of Objectives
 To create an experimental
apparatus that can trace
out a given wing motion
similar to a hummingbird
in hovering flight
 Design a system to capture
the aerodynamic structures
created by this wing
motion
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http://www.ae.utexas.edu/design/humm_mav/
3
Motivation
Study low Reynolds number
unsteady flow of hovering flight
Application for highlymaneuverable MAVs
Single system for thrust and
maneuver
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Overview of Requirements
 Wing Range of Motion
 ±80° in horizontal plane
 ±60° in vertical plane
 ±110° about length of the wing (pitch)
 How Achieved:
 Using simple geometry,
and ensuring that the
wing does not collide with
stationary components
±60° ±110°
±80°
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Overview of Requirements
 Wing tip motion must follow a given path
 Within 20%, of the maximum amplitude, spatially
 Within 20%, of the period, temporally
 Pitch motion must follow a given rotational mode
 Within 20%, of the maximum angle, rotationally
 Within 20%, of the period of rotation, temporally
 How Achieved:
 Design of Wing Mechanism, FEM analysis to ensure minimal
component deflection under loading
 Software: proper control loops to create the desired control motion
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Overview of Requirements
 Frequency
 0-10 Hz with a resolution of 1 Hz
 How Achieved:
 Drive System and control loop
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Overview of Requirements
 Wing Variation
 Simple interchange of wings 5-10 cm in
length, within 30 minutes
 How Achieved:
 Chuck System and removable chamber
panels
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Overview of Requirements
 Visualization of Aerodynamic Flow
 View Area: >30 cm2
 Minimum Resolution: 96 x 96 pixels
 Minimum Frame Rate: >200 frames per
second (fps)
 How Achieved:
 Camera Lenses and Capability
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Goals
Create three different wings with
varying stiffness for testing
Synchronize visualization with
collected three-axis dynamic
loading data
 Precision: less than 0.0015 N
 Range: ± 5 N
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System Design
BIRDIE
Wing
Mechanism
Test Bed
Visualization
Wing Motion
Verification
Mechanical
Components
Containment
Chamber
Camera
Position and
Angle Tracking
Drive System
Components
Support
Structure
Suspended
Particles
Camera
Software
Drive System
Interface
Illumination
Image Collection
Image Collection
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System Design
Solid model
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System Design
Block diagram showing electrical
interconnects
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Visualization Experiment Setup
Light Sources
 Green Laser (what kind of laser?)
 1.3 kW Lamp
Particle Sources
 Dry Ice
 Water-based Smoke
 Oil-based Smoke
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Visualization Experiment Results
Add images
Light source and particle choices
Reasoning behind choices
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