Toy R Us Project

Nguon Nguon

Criterion A

Introduction

We have to design and make up an idea about why toys are entertaining and why is it. We have to make a list of what benefit the players get from playing the toys. We have to evaluate the data that I gather from the primary sources (Interview). However, we also have to gather the value of the toys; Seeing what material they use and how it is the best material (Business) We have to create a toy with average price that gives a lot of benefit to the player when played.

Words Defined

1. Innovation – A new idea or method of doing something

2. Function – A useful thing that people are intended to do

3. Ergonomics – A liberate of the equipment and furniture that can be arranged so that people can do something.

Definition of Toy

Toy is an item that gives euphoria to the player by playing it. Toys are generally played by children and pets. Toys gives young age benefit by letting them have more experience in the society. The enjoyable items usually have many designs and are manufactured by many different materials. It's an influencing digital entertainment for some children. Some toys amounts are limited for children so they would exaggerate about it. The limited one is usually not easy to get. Toys are related to our school community because it's entertainment and most kids are susceptible to toys. It also give knowledge of different things and makes more open-minded.

Research Questions

  1. How to make a toy entertainment?
  2. What are the benefits?
  3. What kind of toy would make people euphoric?
  4. Why is it an appropriate toy for people?
  5. What Function does a toy have?

Question are order according to priority

Primary Source

Secondary Source

Calculator for quad-copter function, I need to calculate if the quad-copter would fly with my selected motors, propellers, frame, battery, electric speed controller, and flight controller.

Secondary Source

The website for buying quad-copter.

Secondary Source

I find inspirational web pages which can give ideas for my design and help to find solutions.
At the same time I analyze existing solutions.

Bibliography

Similar toy list

  • Radio cars
  • Radio helicopter
  • Radio Dodecacopter
  • Radio Speed Boat
  • Radio Jets
  • Radio Plane
  • Radio Hexacopter
  • Radio Octacopter

Radio helicopter

It's not very safe for flying because it only have one rotor to increase the altitude. It's not very innovative because it have existed for a long time. They can not load heavy items.

Radio car

It's has no innovative value because car has been on Earth for more than 120 years and have been used as electric toys for a long period. it is not very entertaining.

Radio speed boat

It's has been around for a very long time and almost as long as a radio car. It only useable on lakes and when it drowns it misplace.

Research Plan

Step 1: I try to find out as much as possible about quad-copters and quad-copter design. Study YouTube videos which can inspire to find a good solution.
Step 2: I try to find suitable components for the frame and the electrical parts.
Step 3: I make a first design, calculate the weight of the frame and the parts.
Step 4: Frame and essential parts like motors, rotors and battery have to be in a way so that the quad-copter can fly well.
step 5: Buy the parts and consider a) that many parts are not available in Cambodia and b) that Cambodian metal shops have limited abilities.
Step 6: Do the actual frame construction and assembly according to the plan and change the plan when needed.
Step 7: Test the electrical components.
Step 8: Do preparations to test flying abilities.
Step 9: fine tuning (calibration and programming)
Step 10: Test flight
Step 11: Find solutions for problems found when actually flying.

My toy that I'm going to create

I'm going to make a quad-copter. A quad-copter is an unmanned helicopter having four rotors.

This toy can entertain people with it's flying skills and most people are stupendous when playing this toy because it can be a transportation for items. People can have a view of the Earth from ground to above 1km with high quality camera.
the problem The problem I am facing is that I want to construct the frame myself. This is very difficult because that hasn't been done in our class before. The solution for this problem is detailed planning, finding companies for the aluminum cutting and drilling etc.
I want to show to other kids that it is possible to build your own quad-copter. Building a quadcopter yourself is much more challenging than just buying one.

Citerion B

Design Specification

  1. Use Aluminum frame with rubber isolation
  2. Appropriate for the age above 10
  3. Having live view while flying
  4. Colorful - Not yet because I exchanged some already colored parts
  5. Thickness of each plate and bar should be at least 1mm
  6. It should have a transmitter
  7. It should have a GPS on flight
  8. Self design frame and self chosen component sets
  9. Simplified Aluminum landing gear
  10. Camera on board

Design 1


  1. Use Aluminum frame with rubber isolation - Got it
  2. Appropriate for the age above 10 - Got it
  3. Having live view while flying - Got it
  4. Colorful - Not yet because I exchanged some already colored parts
  5. Thickness of each plate and bar should be at least 1mm - Got it
  6. It should have a transmitter - Got it
  7. It should have a GPS on flight - Got it
  8. Self design frame and self chosen component sets - Got it
  9. Simplified Aluminum landing gear
  10. Camera on board


Calculated frame weight approximately 1.1kg

Design 2


  1. Use Aluminum frame with rubber isolation - Got it
  2. Appropriate for the age above 10 - Got it
  3. Having live view while flying - Got it
  4. Colorful - Not yet because I exchanged some already colored parts
  5. Thickness of each plate and bar should be at least 1mm - Got it
  6. It should have a transmitter - Got it
  7. It should have a GPS on flight - Got it
  8. Self design frame and self chosen component sets - Got it
  9. Simplified Aluminum landing gear
  10. Camera on board

Calculated frame weight 0.9 kg

Design 3


  1. Use Aluminum frame with rubber isolation - Yes
  2. Appropriate for the age above 10 - Yes
  3. Having live view while flying
  4. Colorful - Yes
  5. Thickness of each plate and bar should be at least 1mm - Yes
  6. It should have a transmitter - Yes
  7. It should have a GPS on flight
  8. Self design frame and self chosen component sets - Yes
  9. Simplified landing gear made from Aluminum. - Yes

Calculated frame weight approximately 1 kg.

Chose design

It has everything I want it to be. It is the best design I have ever made with an elaborate style and frame. It's light (only 0.85 kg) and strong and the quad-copter can have a live view. It also has a GPS and I can program it for automatic flight. The total weight of all the components including battery and camera is 2.4 kg.
I chose large rotors (12 inch) and a very strong (6S) battery to support the motors. This weight is appropriate and exactly fits my motor specifications.
At this point I can say that the success criteria for the chosen design are a) the lightest weight, b) very good strength c) very good electrical parts and d) a highly ergonomic frame.

Detail design of the Quadcopter

Quadcopter detailed drawing

Big image
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Citerion C

List for Quadcopter

  • 2(Aluminum bar 4.5cm x 4.5cm x 66cm x 0.12 thinness)
  • 5(Aluminum plate 20cm x 20cm x 0.1cm)
  • 1(Aluminum plate 10cm x 10cm x 0.1cm)
  • Rubber for electrical isolation
  • 2(Aluminum bar 4.5 x 4.5 x 50cm)
  • Ruler
  • Pencil
  • Marker
  • Compass
  • Formula
  • Electric Speed Controller
  • Heater for welding
  • Transmitter
  • Flight controller
  • Receiver
  • Propellers
  • Naza 1
  • Motors
  • Wire
  • Pliers
  • Nuts
  • Screws
  • Screwdriver
  • Scale
  • Rubber for Electrical isolation

Steps

  1. Design the details and label the Quadcopter on paper
  2. Do the math for weight calculations and motor specifications
  3. Buy the parts needed and solve logistic problems. ˆt is actually very difficult to find the right parts. Âany if not all the big companies don't ship to Cambodia.
  4. Design the details and label the Quad-copter on Aluminum
  5. Drill holes, saw and modify the aluminium bars etc.
  6. Set up the frame
  7. Add rubber isolation to protect sensitive electrical components.
  8. Putting the parts in the frame. At this step I have always to make sure that vibrations are avoided, that every part is firmly secured and that short circuits will be avoided. At the same time I have to solder the wires together
  9. Calibration and programming
  10. Test it
  11. Check for problems
  12. Flight
  13. First longer distance flight

Changes from oringinal

  • The size of the bars - Cambodia doesn't have the size that I want
  • The size of the plates - The bars changes so the plates have to change too
  • Drill holes for screws - I forgot the holes for the holding screws in the design
  • Add many holes to the frame to make it lighter (The screws were very heavy)
  • Add more rubber to protect essential parts
  • The total time needed. Because it is so difficult to find all the tools and parts. Also not every company can do the jobs needed. Example: No laser printers yet in Cambodia.


Summary of design evaluation and changes:

Every change from the original design takes a lot of time. To make a quad-copter and to go though every step I need at least 3 month. Reason: Many parts and machines are not available in Cambodia. There is very much research involved and it is time consuming to buy every item. It is also difficult to make changes to the frame because every change has to be explained in detail to the company which drills holes etc.

Final adaptations and problems


1) When I tried to calibrate the quad-copter I could not connect it to the computer.
After extensive research and testing the problem was found: The main DJI Naza V1unit was broken. It had to be replaced and I upgraded to Naza V2.
2) When I tested one motor did not function well. Again it had to be replaced. The new motor had to be ordered from Hong kong.
3) While calibrating there were problems with the location of the GPS. The GPS should be as close to the center as possible. But later it turned out that the DJI Naza V2 unit has to be at the center and that everything will be - partly automatically - calculated from this point.
4) I also found out that calibration is not the same as fixing a home/ return point. Before flight the quad-copter has to be adjusted to a new home point. If something goes wrong, it will return to that point. This process is very easy but has to be done for every flight.
5) Weight: I drilled many holes because the metal screws were very heavy. I also decided not to use some already finished metal plates. As a result I managed to get almost exactly the recommended weight. Important: Recommended weight for flight is not the same as maximal weight. When you want to fly the quad-copter should hover with only about 50% of thrust.
I also exchanged the heavy 810 grams 6S battery with a lighter 6S battery weighing only 700 grams.
6) Placement of the electrical parts: Originally I designed my frame in a way that all the parts fit inside. This way I could be sure to have more protection. Later on I decided to place them outside for easier testing and exchange if necessary.
7) Soldering: Soldering is not very difficult but you need very good equipment. Soldering with a 2 dollar soldering iron is almost impossible. I recommend everyone who wants to build a quad-copter to buy a good soldering iron for 25 dollars. Otherwise the soldering points might break when they are under stress.
In my original plan the plate where I connected the motors etc, was meant to be inside the frame. This turned out to be impractical because the contact points did break several times.
8) Placement of the motors: Their position was correct but when I finally calibrated it turned out that the motors had to be exchanged because their direction of rotation was not correct.
This is a mistake which can happen easily. For Naza V1 my direction of rotation was correct, for V2 it was wrong.
9) Electrical Speed Controllers, the ESC can exchange easily the direction of the rotation by changing 2 of the 3 cables. I found out how by extensive testing.
10) Landing gear: For the time being I use a simple plastic landing gear.

Later there will be time do some last design changes like placing electrical components inside the frame or adding some water proof coating.

Final advice:
Double checking is not good enough for quad-copter design. Triple checking is better. Any small mistake in connections can and most likely will cause bigger problems. Like the destruction of one or several components. And this will use a lot of time, because Cambodia does not have every part and some companies don't send to Cambodia.

Placing of parts inside the frame: Better done after the final assembly and testing, calibration, retesting and flying! Test extensively!

Frame design: The best design does not help if some machines like 3 D laser printers are not available in Cambodia. Normal metal shops also always do small mistakes due to the low precision the use when they work. This was also a major problem causing delays.

Citerion D

Test Plan

I will test my toy by letting someone hold the quad-copter and I power up the motors without propeller on it so the person won't get harm. It's for testing the vibration on the quad-copter and feel the fusion of the quad-copter.

Test Evalution

The quad-copter flies easily and very stable when it's in GPS mode. When it is in manual it is more difficult and less stable. Standard flying mode should be GPS mode, but it is important to know that signal towers with a strong signal can cause problems.
In conclusion the quad-copter flies very well and very stable.

Design Specification with toy

  1. Use Aluminum frame with rubber isolation - Got it
  2. Appropriate for the age above 10 - Got it
  3. Having live view while flying - Got it
  4. Colorful - Not yet because I exchanged some already colored parts - Got it
  5. Thickness of each plate and bar should be at least 1mm - Got it
  6. It should have a transmitter - Got it
  7. It should have a GPS on flight - Got it
  8. Self design frame and self chosen component sets - Got it
  9. Simplified Aluminum landing gear - changed to simplified plastic landing gear - Got it
  10. Camera on board - Got it

Other's people opinions

Improvement

  • More colorful - It's not standout
  • Build it faster - More people help me so I can finish it faster
  • More tools - I don't have to let others people to drill it for me
  • Landing gear - More creative in creating landing gear
  • Plastic package for easy battery exchange

This toy's benefit while playing

  • Euphoric
  • Skills in flying
  • Stupendous
  • Discover the view of the environment
  • Spying