In Project Collisions, I am creating a system to deliver fast but healthy food by drones. The drone will release the package from a height up to 10 meters and my job as an engineer is to develop a solution so that the package is protected in its fall.

 

For Drop 0, a package with the dimensions of 12 meters, 14 meter, and 16 meters was dropped from a height of 5 meters. Below is a photograph of the package:

This is a picture of our package.

The package will hold some hot food, a burger, some juice or drink, some fruits and maybe some little snack such as chips. Inside, items are organized like this:

This is a quick sketch of the inside of our package.

The purpose of Drop 0 is to get baseline data about our package. The group developed a testing procedure so that we can be consistent on how data is collected throughout the design cycle.

<insert image of final procedure>

During the drops, I noticed that the speed of the package dropping is very fast so it means that if we want to add a parachute it needs to be strong but not too heavy for our package.  Also, a wonder that I have watching was how can we make sure that our package lands softly and slowly with a parachute. The following data was collected:

This is our data table which records the force that was applied when dropping the package.

The average time it took for our package to fall the 5 meters was____________________<amount of time in seconds>. Using LoggerPro, we plotted out the fall of the package.

This is a screenshot of the data that’s collected from Logger Pro.

This is the whole video of our drop.

IMG_0120 

A force plate at the bottom of the drop was used to collect data on the impact force of the package. Our group was okay on how accurate we drop the package we missed on the plate for once out if three times of drop.  As a project metric for accuracy, we want our project to land right on the force plate in order to make accurate data.

The average force on impact was around 110 to 150. As a project metric, our group has decided to make sure the landing is soft and not out of the place too much, more than 2 meters.

Summary: Project Metrics

Our team has decided that the three most important criteria to design towards are the landing to be soft and safe, the food needs to be still hot and not soft and spilling out, and also being accurate when landing.  Below, each metric is described and the goals were determined by data from Drop 0.

  • Soft landing, land with a force of 30 to 50newtons.
  • Accurate landing, we need it to land on the force plate.
  • Food is separated, not soggy, not combined.

Our group is now building the first prototype. I hope that it helps us see and learn more about the mistake that we have and improve to make it better and better.