Flight Stability Analysis of a Symmetrically-Structured Quadcopter Based on Thrust Data Logger Information
Autor: | Lara Emanuele Da Luz, Ioan Tarca, José Osvaldo Rossi, Endrowednes Kuantama, Radu Catalin Tarca, Renata Kopec |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
0209 industrial biotechnology
Quadcopter Physics and Astronomy (miscellaneous) quadcopter Computer science General Mathematics PID controller Thrust 02 engineering and technology Throttle data logger law.invention 020901 industrial engineering & automation Control theory law sensor Data logger thrust measurement control system stability 0202 electrical engineering electronic engineering information engineering Computer Science (miscellaneous) Rotor (electric) lcsh:Mathematics 020208 electrical & electronic engineering Propeller lcsh:QA1-939 Chemistry (miscellaneous) Control system |
Zdroj: | Symmetry; Volume 10; Issue 7; Pages: 291 Symmetry, Vol 10, Iss 7, p 291 (2018) |
ISSN: | 2073-8994 |
DOI: | 10.3390/sym10070291 |
Popis: | Quadcopter flight stability is achieved when all of the rotors–propellers generate equal thrust in hover and throttle mode. It requires a control system algorithm for rotor speed adjustment, which is related with the translational vector and rotational angle. Even with an identical propeller and speed, the thrusts generated are not necessarily equal on all rotors–propellers. Therefore, this study focuses on developing a data logger to measure thrust and to assist in flight control on a symmetrically-structured quadcopter. It is developed with a four load cells sensor with two-axis characterizations and is able to perform real-time signal processing. The process includes speed adjustment for each rotor, trim calibration, and a proportional integral derivative (PID) control tuning system. In the data retrieval process, a quadcopter was attached with data logger system in a parallel axis position. Various speeds between 1200 rpm to 4080 rpm in throttle mode were analyzed to determine the stability of the resulting thrust. Adjustment result showed that the thrust differences between the rotors were less than 0.5 N. The data logger showed the consistency of the thrust value and was proved by repeated experiments with 118 s of sampling time for the same quadcopter control condition. Finally, the quadcopter flight stability as the result of tuning process by the thrust data logger was validated by the flight controller data. |
Databáze: | OpenAIRE |
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