general quad builds - boston universitysites.bu.edu/uav/files/2017/11/frames.pdfhow to build a basic...
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![Page 1: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/1.jpg)
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GENERAL QUAD BUILDS
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FRAME BASICS
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OTHER TYPES OF FRAMES
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WHAT MAKES A GOOD FRAME?● Durable● Rigid (No Flex)● Light● Accessible
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The Good, Bad and the Ugly
![Page 7: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/7.jpg)
The Good, Bad and the Ugly
![Page 8: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/8.jpg)
The Good, Bad and the Ugly
![Page 9: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/9.jpg)
The Good, Bad and the Ugly
![Page 10: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/10.jpg)
The Good, Bad and the Ugly
![Page 11: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/11.jpg)
How to build a Basic Frame
![Page 12: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/12.jpg)
What is Needed?
● Extruded aluminum arms (x4)
● Acrylic plate (x2)
● M3 Screws (x8)
● M3 Lock Nuts (x8)
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Are these Arms a Good Design?
![Page 14: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/14.jpg)
Simple Stress Test
SolidWorks Simulation Static Study
● Motors provide 400g thrust ≃ 3.92N force.
○ 1N = 1kg m/s^2
● One end treated as rigidly fixed.
● Other end has a 130N force applied upwards at the end.
● Yield stress for aluminum is 2.275 e+0008 N/m^2
○ Can be written as 2.275 x 10^8 N/m^2
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Simple Stress Test
Mass = 0.024kg * 4 arms = 0.096kg ≃ 100g
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Simple Stress Test
Mass = 0.016kg * 4 arms = 0.064kg = 64g (36% reduction)
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Evaluation?
Pay attention to the ranges of colors, not the colors themselves.
![Page 18: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/18.jpg)
Simple Drop Test
Solidworks Simulation Drop Test Study
● Height of 1m.
● 1kg mass attached to end of arm.
● Arm at a 30 degree angle.
● Yield stress for aluminum is 2.275 e+0008 N/m^2
○ Can be written as 2.275 x 10^8 N/m^2
![Page 19: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/19.jpg)
Simple Drop Test
No weight relief 1kg mass rigidly attached at end
Yield Stress = 2.275 e+0008 N/m^2
![Page 20: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/20.jpg)
Simple Drop Test
Weight relief 1kg mass rigidly attached at end
Yield Stress = 2.275 e+0008 N/m^2
![Page 21: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/21.jpg)
Evaluation?
Pay attention to the ranges of colors, not the colors themselves.
![Page 22: GENERAL QUAD BUILDS - Boston Universitysites.bu.edu/uav/files/2017/11/Frames.pdfHow to build a Basic Frame What is Needed? Extruded aluminum arms (x4) Acrylic plate (x2) M3 Screws](https://reader035.vdocuments.us/reader035/viewer/2022071409/610229b302732d1c797373e4/html5/thumbnails/22.jpg)
How to Make the Arms?
Band Saw or Mill
Drill Press or Mill
Mill
Band Saw or Mill
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How to Make the Arms?
Drill Press or Mill
Important dimension !!!M2 [2mm] holes (for motor mount).20mm center to center
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Epic or Imagineering
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Other Things to Think About
● Weight relief on the plastic sheet.
● Landing legs
● Where / how to attach the ESCs.
● Damping for the microcontroller.
● Other unique ideas.