Identificando o apogeu de um foguete utilizando a controladora Pixhawk

Abstract

In rockets launched by the UFC Aerospace Development Group - GDAe, which is a group focused on the study, development and construction of rockets, there are many post-launch problems due to the impact of the projectile on the ground, which may require repair. of components or obtaining new materials, and the difficulty of locating the rocket at the end of the path, evidenced by the randomness of the route taken by the projectile. The group has already proposed the use of a parachute rocket, but failed to implement correctly. One way to increase the accuracy of position landing in unmanned parachute systems is by using control algorithms that get data collected through sensors installed on parachutes. Thus, this work aims to implement a apogee identification algorithm allowing the opening of a parachute in a rocket creating conditions for a possible control system to be implemented. The study was conducted from the construction of a Pet bottle rocket and the use of the Pixhawk controller board. By coupling the Pixhawk on the rocket it was possible to write test altitude data on a microSD and, after several launches, an algorithm was developed using Kalman Filter. The filter was applied to data sets saved in microSD and resulted in a detection error standard error rate of 0.027529 seconds and a standard deviation of 0.055058. A mathematical model was developed that estimates the launching peak from the amount of pressure and the amount of water used in the rocket, as well as a test plan to facilitate the experimental validation of the solution.