Rocket-Fin-Stabilizer

Arduino-based rocket fin stabilization system using MPU6050 and servo actuators

Features

• Real-time Attitude Control: 20Hz update rate for responsive stabilization

• 4-Fin Configuration: Independent control of pitch and roll axes

• Auto Calibration: Automatic sensor offset calculation on startup

• Deadband Control: Prevents servo jitter during stable flight

• Serial Monitoring: Real-time telemetry output for debugging

• Arduino Mega Optimized: Utilizes additional pins and processing power

Hardware Requirements

Components Required

Component	Specification	Quantity
Arduino Mega 2560	ATmega2560, 16MHz	1
MPU6050	6-axis IMU sensor	1
Servo Motors	SG90 or similar, 9g	4
Power Supply	11.1V LiPo recommended	1

Pin Configuration (Arduino Mega)

MPU6050:

• SDA → Pin 20

• SCL → Pin 21

• VCC → 5V

• GND → GND

Servos:

• Fin 1 → Pin 8

• Fin 2 → Pin 9

• Fin 3 → Pin 10

• Fin 4 → Pin 11

Circuit Diagram

Theory of Operation

The stabilization system uses a closed-loop control approach:

• Sensor Reading: MPU6050 provides accelerometer data at 20Hz
• Attitude Calculation: Roll and pitch angles computed using accelerometer
• Error Calculation: Deviation from level flight determined
• Control Output: Servo positions calculated to counteract rotation
• Actuation: Fins moved to generate corrective aerodynamic forces

Control Logic

Servo Position = Center ± (Angle × Gain)

Installation

git clone https://github.com/diptiman-mohanta/rocket-fin-stabilizer.git
cd rocket-fin-stabilizer

Citation

If you use this work in your research, please cite:

@misc{rocket-fin-stabilizer,
  title={Rocket fin stabilizer using Arduino, MPU6050 and Servos},
  author={Diptiman Mohanta and Akash S R},
  year={2025},
  url={https://github.com/diptiman-mohanta/rocket-fin-stabilizer.git}
}