29 Sep

Foray - Improved design of gondola

Jiahao(Nick) Li

I improved the design of gondola that the current version has a lighter weight than before. And the motor drivers are fixed onto the gondola to be more stable. Also, 1'' jumper wires are used to reduce the total weight. Before: After:

29 Sep

ESP Wifi Module and Blynk Software

Ryan Chen

Recently, I have been working on connecting the ESP Wifi Module and the Blynk software. I have been looking into both emulation and ESP Now. Additionally, the Blynk software for controlling the motors does have capabilities with Bluetooth, so I will also be testing the Blynk software with my HC-05 m...

28 Sep

FORAY Integration Test - Motor Driver + WIFI

Parth Agrawal

Microcontroller - ESP32 Motor Driver - TB6612FNG Dual Motor Driver Propeller Size - 45mm (diameter) Communication - WIFI Module using Blynk I also found out that ESP32 does not have a native implementation of the AnalogWrite function. This has led to problems for PWM. I will look for a...

24 Sep

Initial Testing of Blimp Altitude Filtering Algorithms

Ethan Uetrecht

In order to improve the inertial measurement capabilities of the blimps on the Foray project, I have been working with Zhaoliang to implement various filtering algorithms for the altimeter data we collect. So far, I have used Matlab to create both an exponential filter and a moving average filter....

23 Sep

Combining SLAM frontend and backend

tsang-kai-chang

The SLAM frontend, in my definition, finds the features in the image and assigns the same landmark id to matched images. The overall SLAM performance relies on the quality of observation file provided by the frontend, as well as the optimization problem established by the backend. Frontend The...

23 Sep

Experimenting with various balloon facing mechanisms to improve control

Pranav Sankar Srinivasan

The past two weeks, I have been developing different balloon facing mechanisms with the goal of creating one that improves the blimp's capability to control the balloon. My first idea was to build a "fence" made out of barbecue skewers and mount it onto the top of the blimp. The idea was that th...

23 Sep

Foray - Power consumption test

Jiahao(Nick) Li

This week I also tested the power consumption while operating the blimp. The test is run under the setup that: 2 motors are running the whole time in 80% PWM 500 mAh 3.7v lipo battery The initial voltage of the 3.7v battery is 4.16v, which is fully charged. And I measure the voltage of the bat...

21 Sep

Foray - Integration test - Catching the ball and send it to the goal

Jiahao(Nick) Li

This week I conducted the test simulating a single blimp in the competition capturing the ball and send it to the goal. The components in the test are not exactly the same as what will be used in the competition, however, it is still a good test to show the capability of the blimp. here is the v...

18 Sep

"Corrugation" Paper Revision and Resubmission to ICRA2021 (R-AL)

Chang Liu

Quick Reminder: Goal: computational design and fabrication of corrugated mechanisms from behavioral specifications We studied double layered corrugation mechanism. The purpose is to increase stiffness in foldable structures. We also provide a simple model for optimial design based on maximum s...

17 Sep

Motor Current Draw

Ryan Chen

I have been working on testing power consumption. Below are the results for the brushless and brushed dc motors we currently have. This means that with a 1000 mAh battery, we can run one of these motors for about seven hours. This result is quite good, but I need to extend the test for longer an...

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