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From n3kl.org
In this paper, we discuss the wind tunnel testing of a new VTOL aircraft configuration - namely the lift-augmented quadcopter (LAQ). We conducted a series of demonstration free-flights as well as a series of tests within a full scale JAXA wind-tunnel. My work on the project was primarly focused on sensing, measurement and data logging, as well as a wire-powered source that allowed for long duration testing without the need to exchange vehicle batteries.
I created an innovative methodology using strain gauges applied to the root of the wing spar to calculate generated lift. This was integrated with propulsion power measurements to determine over-all efficiency gains. Due to the highly constrained space within the vehicle, as well as the need to integrate external sensors, all measurment and telemetry hardware was custom built, along with writing my own logging and plotting software.
In this paper, we optomized aerodynamics of the body design (blended body) of the previous VTOL aircraft configuration - namely the lift-augmented quadcopter (LAQ). A new blended body overlay was built using 3D printing, configured to mate smoothly with the exisitng wing sets. We conducted a series of tests within a full scale JAXA wind-tunnel. My work on the project was primarly focused on sensing, measurement and data logging, as well as a wire-powered source that allowed for long duration testing without the need to exchange vehicle batteries.
Expanding on the original sensor system, I created a "DAQ box" that could be mounted to the wind tunnel sting arm, which expanded the variety of sensors and automated test proceedures we could run. This box ran linux internally, allowing us to run a variety of test scripts, as and sensor configurations with ease. I modified the custom software from the previous testing to enable remote operation of this DAQ box.
Along with the emergence of electric vertical takeoff and landing (eVTOL) aircraft arose the need to predict propeller performance, namely thrust and power, at unconventional free stream angles. For cases where this angle is either 0° (hover) or 90° (forward flight), it is not difficult to estimate the performance. However, in the case of long-range eVTOLs, where the free stream angle is usually in between these angles, the propeller behaves differently. Blade element theory (BET) models can account for this but are impractical due to their large number of geometric parameters. As a substitute, we present an empirical model built on wind tunnel data that uses only propeller diameter and pitch to define the geometry, while capturing the effects of free stream angle on thrust and power.
My work on this project can be seen as an extension of the above papers; namely that of how to measure and collect the data during the experiment. As an extension to the work performed in "Additional Wind Tunnel Testing of a Lift-Augmented Quadcopter", I produced a custom test sequence (script) and sensing hardware to automate the collection of hardware at each given pitch angle.
Proficient or competent in a wide variety of technical fields required for systems design, fabrication and deployment:
Electronics Engineering | Micro-controllers |
Embedded systems |
Industrial Automation | Instrumentation | Data aquisition |
Sensor design | machine fabrication | 480 VAC industrial wiring |
Communications | Computer Numeric Control | Welding |
2006 Bachelors of Science in Electrical Engineering and Communications Technology ITT Technical Institute, Tucson, Arizona
2004 Associates of Applied Science in Electronical Engineering Technology ITT Technical Institute, Tucson, Arizona
ETA-I: Testing Proctor
National Technical Honors Society: Honorary Member
Tokyo HackerSpace: Founding Member, Chairman, Instructor
I teach recurring lessons at Tokyo Hackerspace, in topics such as Arduino, Electronics 101, Window farms, and welding.
2/2014 - Participant in Race for Resilience at Tokyo University. I was on the Community Radio Transmitter team.
12/2013: Presentor Saitama City Board of Education - Crazy Suggestions! - an engaging and enjoyable card game I designed to help students express ideas and suggestions for various situations. The game puts focus on creative validations for wacky and seemingly unconnected situation-advice pairs. This enhances student's abilities to speak freely and openly in the future.
3/2012: Presentor JALT Omiya - Daiso classroom - using unusual items found at Daiso and 100 yen shops to build affective games for students. This presentation also put focus on a game I designed called "Build a Town". The presentation was published in the SaitamaCityEducators Journal, Volume 2, issue 2.
2009: Presentor Saitama City Board of Education - Preparing students for speech contests: What we can and can not do.
Embedded: Arduino, environmental sensor networks, mechatronics, robotics
Web: Pachube, Drupal, Wordpress, ZenCart
Hobbies: electronics, leatherwork, Geocaching, fencing, metal work
Chief of Hardware Engineering, VPC-Asia, Setagaya Tokyo, June 2021 - present
VPC-Asia is a virtualization and IoT company specializing in business to business applications. As C.H.E. I am responsible for all electronics and mechanical design of the IoT side of the business.
Research and Development Engineer, Autonomous Control Systems Laboratory, Chiba University, July 2014 - June 2021
ACSL prototypes, designs, builds and tests autonomous aerial vehicles for non-military industrial and government applications. We work exensively with SLAM navigation using LIDAR, sonar, camera and Inertial Measurement Unit sensors. As a small university funded lab and company, all R&D staff perform multiple roles. Mine include:
Chairman and Instructor, Tokyo HackerSpace, 2008 - Present
Native English Teacher, Tokyo and Saitama November, 2006 - July 2014
MOSWELL, Yokohama July, 2008 - October 2008 Engineer, English Sales Representative
Freelance / Contract Technician, Tucson Arizona November, 2004 - October, 2006
Caterpillar Proving Grounds, Tucson Arizona April, 2004 - November, 2004 Instrumentation Technician
Solar Industries, Inc, Tucson Arizona April, 2003 - April, 2004 Automation Engineer / Maintenance Technician
Desert Diamond Casino , March 2001 - March, 2003 Slot Technician - grade 2
Chuck E Cheese's April, 1999 - March 2001 Technical Manager
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