Guidance and Control

Guidance, Navigation and Control

Navigation guidance control technology is an important element for realizing autonomous navigation in rockets and aircraft.

Guidance: A flight trajectory is generated to reach the target point, and the target value of the aircraft attitude to achieve the trajectory is determined.
Navigation: Measure and estimate the condition of the aircraft, including its position, speed, and attitude.
Control: To achieve the target value from the guidance, the attitude of the aircraft is controlled using the aerodynamic rudder surface, TVC, etc.

We are conducting research on guidance and control systems.

Research Content


If something goes wrong, it is very important to stop the flight safely. To achieve this, it is important to create a trajectory. The purpose of our research on guidance is to develop an algorithm to generate a trajectory that can fly without setting a reference trajectory in advance and under uncertain conditions.

  • Optimal trajectory generation and real-time guidance using DynDGA (dynamic distributed genetic algorithm).
  • Obstacle Avoidance Orbit Generation by Random Search


Winged rocket depends on aerodynamic nonlinear parameter due to flight a various condition such as the high dynamic pressure at ascend using thrust and the high angle of attack at re-entry. Therefore, it is essential for realization of reusable suborbital system to research the nonlinear control system applicable to such a various situation. This laboratory researches a dynamic inversion (DI) method, which can calculate the flight control surface by inverse kinematics to get a desired attitude. This method makes it possible to design controller easier as compared with a classical control theory requiring complicated gain scheduling.

In addition, this laboratory researches the TVC (Thrust Vector Control) system that control the attitude by changing the thrust vector using the gimbal of engine, and the RCS (Reaction Control System) that control the attitude by gas injection in the flight area without air force.

  • Attitude control using multi hierarchy dynamic inversion method
  • Attitude control by TVC in ascend flight
  • Attitude control by RCS