Formation control of multi-quadrotor using leader-follower method based on mliding mode

Document Type : Research Paper

Authors

1 Shahid Beheshti University, faculty of new technologies and aerospace engineering, Tehran, Iran

2 Graduated Student, faculty of new technologies and aerospace engineering, Shahid Beheshti University

3 Associate Professor of Electrical Engineering, university of Qom

4 Shahid Beheshti University, faculty of new technologies and aerospace engineering,Tehran, Iran

Abstract

In this paper, formation tracking control by maintaining a triangular shape for three quadrotors is discussed. Because of the nonlinear dynamic of the quadrotor and the presence of the external disturbance in the quadrotor dynamic model, a sliding mode controller was used for independent control of the quadrotor .To Formation Control of Quadrotors, a leader-follower decentralized formation control was applied. In such a way that the leader, follows a reference path and the followers use a formation controller to maintain a constant distance and an angle to the leader. First, the dynamic of the formation error is considered and then by using the integral slide mode controller, the formation error is reduced to zero. The simulation results obtained from the design of the sliding mode controller showed the occurrence of the Chatting phenomenon in the control commands, which was removed using the approximation of continuous functions. And the simulations obtained from this method showed the elimination of chattering in the control commands and the smooth tracking without oscillation of the desired path in the control commands. Also, the simulation results of formation control in the three missions with different paths, different formation geometry, and the number of different quadrotors indicate that the followers follow the leader and the success of formation control.

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References

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