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Medi-Quad Project
Medi-Quad Project
Introduction - A peek through the keyhole
Introduction - A peek through the keyhole
The goal of this project is to provide the most basic necessities in grave situations to the remotest of areas in the shortest possible time. Just immediately after any calamities like hurricanes, floods or earthquakes, the ways to communicate and provide immediate help to the victims become disrupted. The most devastating of losses occur in between this period. If somehow, we can provide things like, medic kits, saline packs, dry foods etc. in small amounts in each of our Medi-Quads, severe physical damages and even lives can be saved.
The goal of this project is to provide the most basic necessities in grave situations to the remotest of areas in the shortest possible time. Just immediately after any calamities like hurricanes, floods or earthquakes, the ways to communicate and provide immediate help to the victims become disrupted. The most devastating of losses occur in between this period. If somehow, we can provide things like, medic kits, saline packs, dry foods etc. in small amounts in each of our Medi-Quads, severe physical damages and even lives can be saved.
In a sense, quad-copter is one of the most common known projects worldwide. There maybe thousands of YouTube videos or websites for ins and outs on quad-copters or homemade drones. Yet, we decided to do this just because we wanted this to use in a different way. Rather than using drones as military or surveillance purpose or just simply a toy for entertainment, we wanted to use our Medi-quad to deliver necessary things in times of natural calamities or grave accidents.
In a sense, quad-copter is one of the most common known projects worldwide. There maybe thousands of YouTube videos or websites for ins and outs on quad-copters or homemade drones. Yet, we decided to do this just because we wanted this to use in a different way. Rather than using drones as military or surveillance purpose or just simply a toy for entertainment, we wanted to use our Medi-quad to deliver necessary things in times of natural calamities or grave accidents.
Design Aspects & Key Features
Design Aspects & Key Features
First and foremost step and obviously the most crucial part of our project was design and material. There were several key features that must be satisfied if this project was to be successful and to meet its purposes.
First and foremost step and obviously the most crucial part of our project was design and material. There were several key features that must be satisfied if this project was to be successful and to meet its purposes.
Firstly, its goal is to carry things and in order to carry more weights, its self-weight must be minimal! So instead of aluminium or carbon-fibers, we chose light-weighted woods as the material of the chassis.
Firstly, its goal is to carry things and in order to carry more weights, its self-weight must be minimal! So instead of aluminium or carbon-fibers, we chose light-weighted woods as the material of the chassis.
Secondly, woods would definitely lack the rigidity and strength that carbon-fibers or Aluminium provide. So our design had to be small so that its easy to control while in the air and less protrusion would help to avoid obstacles or trees.
Secondly, woods would definitely lack the rigidity and strength that carbon-fibers or Aluminium provide. So our design had to be small so that its easy to control while in the air and less protrusion would help to avoid obstacles or trees.
Thirdly, small and light-weighted woods would definitely reduce the capital costs for construction. Also Medi-quads must be made in numbers and to be sent as a flock to carry large amount of products and goods.
Thirdly, small and light-weighted woods would definitely reduce the capital costs for construction. Also Medi-quads must be made in numbers and to be sent as a flock to carry large amount of products and goods.
Design of Prototype & Manufacturing
Design of Prototype & Manufacturing
Considering all these factors, we primarily designed a prototype using AutoCAD and SolidWorks softwares. Designs are shown in the figure.
Considering all these factors, we primarily designed a prototype using AutoCAD and SolidWorks softwares. Designs are shown in the figure.
We wanted to make the chassis as accurately as possible so that symmetry is kept in all 4 wings. This would help to maintain the C.G. of the structure very stable and balanced.
We wanted to make the chassis as accurately as possible so that symmetry is kept in all 4 wings. This would help to maintain the C.G. of the structure very stable and balanced.
So we took the help of laser cutting tools. We went to Katabon market, near Elephant Road, Dhaka, there are severals shops in the second floor this purpose. We observed several wood samples and also some plexi glass and acrylic samples as alternatives. Then we felt that kerosene wood would be the best match for the design factors and other features.
So we took the help of laser cutting tools. We went to Katabon market, near Elephant Road, Dhaka, there are severals shops in the second floor this purpose. We observed several wood samples and also some plexi glass and acrylic samples as alternatives. Then we felt that kerosene wood would be the best match for the design factors and other features.
After this, we bought other components from Patuatuli market, Sadarghat, Dhaka.
After this, we bought other components from Patuatuli market, Sadarghat, Dhaka.
Design of Prototype in AutoCAD (The units are in mm)
List of All Components
List of All Components
Mechanical Components:
Mechanical Components:
2 pairs of Propellers (CW & CCW)
4 BLDC Motors (Brushless DC Motors)
Mild steel base structure for Motors
Electrical Components:
Electrical Components:
4 ESCs (Electronic Speed Controller)
Flight COntrol Board (KK Board 2.1.5)
Battery (3300 mAh, 3 cell Li-Po battery)
Power Connecting Board
Remote Controller & Receiver
Design Adaptation and Fine-tuning
Design Adaptation and Fine-tuning
Another problem arose then, if the brushless D.C. motors are set directly on top of the wooden wings. Vibration would be too much that can even cause cracks on it. So we decided to use mild steel bases below the motors to absorb the vibration effects. We took the help of sheet metal shop and machine shop of BUET.
Another problem arose then, if the brushless D.C. motors are set directly on top of the wooden wings. Vibration would be too much that can even cause cracks on it. So we decided to use mild steel bases below the motors to absorb the vibration effects. We took the help of sheet metal shop and machine shop of BUET.
Finally, after assembling every component, the most gruesome and tiring work started, trial & error. We used flight controller board for the quad. As our quad was custom made, we had to set the PI (Proportional Integral) values ourselves. So we flew our quad, changed PI values to observe and adjust the balance of yaw, pitch and roll movements. This continued ill the battery charge was drained, then in the next day, we flew it again. Also not to mention, we had to buy quite e few spare propellers because after each crash landings, 1 or 2 propellers being broken was a common thing.
Finally, after assembling every component, the most gruesome and tiring work started, trial & error. We used flight controller board for the quad. As our quad was custom made, we had to set the PI (Proportional Integral) values ourselves. So we flew our quad, changed PI values to observe and adjust the balance of yaw, pitch and roll movements. This continued ill the battery charge was drained, then in the next day, we flew it again. Also not to mention, we had to buy quite e few spare propellers because after each crash landings, 1 or 2 propellers being broken was a common thing.
Then several weeks of testing, patience and trial runs finally paid off, our quad gave several smooth flight. Here, two videos of our final project run is attached.
Then several weeks of testing, patience and trial runs finally paid off, our quad gave several smooth flight. Here, two videos of our final project run is attached.
Poster Presentation
Poster Presentation
MEDI-QUAD (1).pptx
Acknowledgement
Acknowledgement
This project was a teamwork and without any of my teammates' contribution, this project planning and designing wouldn't be fruitful. Heartiest gratitude to the team. Also thanks to the Machine shop instructors for their support and guidance. Last but not least, we as a team are indebted to our course teachers. Whenever we ran into troubles or difficulties, they always gave us the boost we needed.
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