Project

# Title Team Members TA Documents Sponsor
2 Bird Simulator
Anthony Amella
Eli Yang
Emily Liu
Shiyuan Duan design_document1.pdf
final_paper1.pdf
photo1.jpg
photo2.jpg
presentation1.pdf
proposal1.pdf
video
# Bird Simulator

Team Members:
- Anthony Amella (aamel2)
- Emily Liu (el20)
- Eli Yang (eliyang2)

# Problem

FPV drones give people a chance to experience immersive flight through FPV goggles, improving engagement. However, this immersion is primarily visual and does not allow for physical control such as motion cues or body orientation. This results in an experience with a realism factor missing for people who want an even more exhilarating experience.

# Solution

Our bird simulator will allow the pilot to control a drone using motion. This system will consist of a drone with a camera, FPV goggles, and a suit connected to IMUs that can be worn by a person that will read information about how their body moves and is oriented. The motion captured by the suit will then be converted to instructions that the drone can use to maneuver in its environment.


# Solution Components

## Visuals

We will use 5.8 GHz radio to transmit video data from the drone to the goggles using a pair of transmitters and receivers (RTC6705 and RTC6715). These RF modules handle amplifying, mixing, and modulating/demodulating signals, while leaving us the ability to configure and program the module through SPI with a microcontroller. We will use a camera that outputs analog video to be transmitted by the RTC6705 and received by the RTC6715 module in the goggles to be converted to composite video and displayed on a small screen.

We expect the development of the other subsystems to require a lot of trial and error, so we will develop a virtual simulation environment using JavaScript/WebGL that will allow testing with less safety concerns.

## Drone

We will design and manufacture a drone from scratch. The body of the drone will be made through a waterjet from carbon fiber, similar to existing COTS racing drones. Tentatively, we will make the drone on a 3-inch frame. Notably, the drone will have a servo attached to the FPV camera, which will allow for pitch to be changed mid-flight. This will allow the drone to look forward, regardless of the position of the actual drone body. This will allow the FPV pilot to feel more like a bird, since birds generally look forward during flight, regardless of their speed. The drone will consist of a 5.8GHz AM radio transmitter, as described above, as well as a 2.4GHz SX1280 receiver for control signals from the pilot. We will also make our own ESCs, allowing us to control the motors with a custom BLDC controller with FDMC8010 MOSFETs. The drone will have auto-leveling capabilities, harnessing the IMU in the drone body. This will allow for easier flight, with the drone staying roughly level.

## Control

There will be 4 IMUs embedded in a wearable suit that will collect data to be combined and used to determine the motion and orientation of the user: one on each arm, one on the head, and one on the torso. We plan to use the IIM-20670 which includes a gyroscope and accelerometer and communicates with the MCU using SPI. Movements such as head rotation, wing flapping, body orientation, and others to be determined will be translated to stick inputs on a normal drone controller.

We will also make a normal drone controller to override suit inputs and take over control in case the drone starts behaving unexpectedly. Both the suit and the controller will transmit signals using a 2.4 GHz transceiver (SX1280), which will be received by the drone also equipped with an SX1280. Using these modules requires writing driver code to facilitate communication with the MCU.

# Criterion For Success

At a minimum, we will make a drone that is able to control four BLDC motors, as well as receive 2.4GHz control signals and transmit 5.8GHz video. The drone will have some form of auto-leveling with a built in IMU, as well as a camera with variable pitch. We will also make a bird suit, with four IMUs that can generate signals that could control the drone. These signals will initially be used to control a drone simulator, programmed in WebGL. If time permits, these signals will also control the drone, allowing for real-world flight. Of note, Eli Yang has a FAA Remote Pilot Certification, allowing for legal outside flight. To start, we will use off-the-shelf FPV goggles, but we will make our own if time permits.



Recovery-Monitoring Knee Brace

Dong Hyun Lee, Jong Yoon Lee, Dennis Ryu

Featured Project

Problem:

Thanks to modern technology, it is easy to encounter a wide variety of wearable fitness devices such as Fitbit and Apple Watch in the market. Such devices are designed for average consumers who wish to track their lifestyle by counting steps or measuring heartbeats. However, it is rare to find a product for the actual patients who require both the real-time monitoring of a wearable device and the hard protection of a brace.

Personally, one of our teammates ruptured his front knee ACL and received reconstruction surgery a few years ago. After ACL surgery, it is common to wear a knee brace for about two to three months for protection from outside impacts, fast recovery, and restriction of movement. For a patient who is situated in rehabilitation after surgery, knee protection is an imperative recovery stage, but is often overlooked. One cannot deny that such a brace is also cumbersome to put on in the first place.

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Solution:

Our group aims to make a wearable device for people who require a knee brace by adding a health monitoring system onto an existing knee brace. The fundamental purpose is to protect the knee, but by adding a monitoring system we want to provide data and a platform for both doctor and patients so they can easily check the current status/progress of the injury.

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Audience:

1) Average person with leg problems

2) Athletes with leg injuries

3) Elderly people with discomforts

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Equipment:

Temperature sensors : perhaps in the form of electrodes, they will be used to measure the temperature of the swelling of the knee, which will indicate if recovery is going smoothly.

Pressure sensors : they will be calibrated such that a certain threshold of force must be applied by the brace to the leg. A snug fit is required for the brace to fulfill its job.

EMG circuit : we plan on constructing an EMG circuit based on op-amps, resistors, and capacitors. This will be the circuit that is intended for doctors, as it will detect muscle movement.

Development board: our main board will transmit the data from each of the sensors to a mobile interface via. Bluetooth. The user will be notified when the pressure sensors are not tight enough. For our purposes, the battery on the development will suffice, and we will not need additional dry cells.

The data will be transmitted to a mobile system, where it would also remind the user to wear the brace if taken off. To make sure the brace has a secure enough fit, pressure sensors will be calibrated to determine accordingly. We want to emphasize the hardware circuits that will be supplemented onto the leg brace.

We want to emphasize on the hardware circuit portion this brace contains. We have tested the temperature and pressure resistors on a breadboard by soldering them to resistors, and confirmed they work as intended by checking with a multimeter.

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