Agfianto Eko Putra

Work place: Department of Computer Science and Electronics, Faculty of Mathematics and Natural Science, Universitas Gadjah Mada, Yogyakarta, Indonesia



Research Interests: Computer systems and computational processes, Computer Architecture and Organization, Data Structures and Algorithms


Agfianto Eko Putra, Dr is senior researcher in Department of Computer Sciences and Electronics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada. His work has been published in several international journals for Digital Signal Processing, Embedded Electronics, Satellite Systems / Electronic and Instrumentation. The research focuses are Digital Signal Processing, Embedded Electronics, Satellite Systems/Electronic and Instrumentation.

Author Articles
Translation Movement Stability Control of Quad Tiltrotor Using LQR and LQG

By Andi Dharmawan Ahmad Ashari Agfianto Eko Putra

DOI:, Pub. Date: 8 Mar. 2018

Quadrotor as one type of UAV (Unmanned Aerial Vehicle) is a system that underactuated. It means that the system has a signal control amount is lower than the degrees of freedom or DOF (Degree Of Freedom). This condition causes the quadrotor have limited mobility. If quadrotor is made to have 6 DOF or more (overactuated system), the motion control system to optimise the flight will be different from before. We need to develop overactuated quadrotor control. Quadtiltrotor as the development of quadrotor has some control signal over its DOF. So we call it as an overactuated system. Based on the type of manoeuvre to do, the transition process when the quad tiltrotor performs a translational motion using the tilting rotor need special treatment. The tilt angle change is intended that the quad tiltrotor can perform translational motion while still maintaining its orientation angle near 0°. This orientation angle can change during the undesirable rotational movement as the effect of the transition process. If additional rotational movements cannot be damped, the quad tiltrotor can experience multi overshoot, steady-state error, or even fall. Because of this matter, we need to develop flight control system to handle it. The flight control system of quad tiltrotor can be designed using a model of the system. Models can be created using quad tiltrotor dynamics by the Newton-Euler approach. Then the model is simulated along with the control system using the method of control. Several control methods can be utilised in a quad tiltrotor flight systems. However, with the implementation of LQG control method and Integrator, optimal translational control of the quad tiltrotor can be achieved.

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