12 Apr

FORAY - Flying test: Vertical and horizontal control

Zhaoliang Zheng

The vertical and horizontal control of the new design:

31 Mar

FORAY - Flying test: Vertical control on a newly designed balloon

Zhaoliang Zheng

Vertical control on the newly design balloon: We will start testing horizontal control shortly.

31 Mar

FORAY - A newly designed balloon v.s. previous balloon

Zhaoliang Zheng

Old custom balloon: Newly design balloon: Compared with previous balloon, the newly design balloon has better shape for our capture mechanism. And the leakage situation is also better after we imporve and iterate our manufacturing process.

31 Mar

FORAY - Capture mechanism testing on Balloon: Capture ball with FPV cam

Zhaoliang Zheng

After testing our previous active caputure mechanism, we found that one is pretty unstable, so this week, we tried another passive capture mechanism. And it worked nice. During the test, we did find some bugs that we need to fix. We'll try to fix that this week.

31 Mar

FORAY - Flying test: Try one design and control on fish balloon

Zhaoliang Zheng

We tried one of our designs on the fish balloon. Tested vertical and horizonal control under Opti-track system:

25 Mar

FORAY - Flying test: Different thrust on spherical balloon

Zhaoliang Zheng

We've tested the different thrust using Crazyflie blimp setup. The 80% thrust and 100% thrust: It is noticed that 100% thrust will generate more swing motion on the spherical balloon which doesn't have the stable mechanism (fin for example)

25 Mar

FORAY - Manufactured a 4-side balloon

Zhaoliang Zheng

New red 4-side balloon: Manufacturing process: (1) Setup (2) Draw a shape of balloon (3) Heating and cutting

25 Mar

FORAY - Improvement of ball-capture mechanism

Zhaoliang Zheng

Gripper open state: Gripper closed state: The demo of ball capture mechanism: After the experiment, we found that it needs to imporve: (1) The gripper is too heavy for the servo motor to pull. (2) The servo motor is too weak, need to change to a more powerful motor.

20 Mar

FORAY - Ball-catching mechanism design

Zhaoliang Zheng

Recall that our previous conceptial design: They are either too heavy or too unstable to put on a balloon so we discarded those designs. After several iterations of design and 3D printing, we got closed to our final design: To make sure all the assembly is correct, we built a integrated...

17 Mar

FORAY - Find a good way to manufacture balloon

Zhaoliang Zheng

Last week, I tried different ways of manufacturing balloon. And it turned out the soldering iron way is the best way for one person to do that in the lab. Last Friday, I successfully manufactured one in the lab, as shown in the following figures. And the following figure is what happened afte...

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