As a very serious problem for control systems, actuator saturation often leads to an unstable system. The maneuvering flight of quadrotors may lead saturation, which commonly affects the quality, including trajectory-tracking accuracy. Quadrotors usually adopt double-closed-loop control, outer loop is position used calculate desired attitude angle and inner generate actions vehicle. To address ...

In this paper the formation and trajectory tracking control problem for multi-agent systems is presented. Initially, a control strategy for a group of holonomic robots is proposed. The proposed control is extended to the nonholonomic case. The control scheme is based on potential functions which make possible the design of decentralized formation control scheme while avoiding agents collisions....

Support of this work by the NTUA Senator Committee of Basic Research, Programme “Protagoras”, R.C. No. 10, is acknowledged. Abstract− This paper addresses the combined problem of trajectory planning and tracking control for underactuated AUVs moving on the horizontal plane. A reference feasible trajectory for the position and orientation of the AUV is planned so that it is consistent with vehic...

This paper investigates the coordinated trajectory tracking problem of multiple vertical takeooff and landing (VTOL) unmanned aerial vehicles (UAVs). The case of unidirectional information flow is considered and the objective is to drive all the follower VTOL UAVs to accurately track the trajectory of the leader. Firstly, a novel distributed estimator is developed for each VTOL UAV to obtain th...

Autonomous navigation of a mobile robot is a widely studied problem in the robotics community. Most robots designed for this task are equipped with onboard sensor(s) to perceive the external world (sonars, laser telemeters, camera). Two main approaches to autonomous navigation have been proposed: reactive navigation, where the robot uses only its current perceptions to move and explore without ...

This paper presents trajectory tracking based on a sliding mode controller for the Puma robot manipulator. is most commonly used in industries; it has great flexibility compared to other manipulators like SCARA, which decreases its precision. In order increase precision Sliding Lyapunov stability approach this work. The first motion control block Controller designed and link with Robot manipula...

The fabrication of accurate prototype from CAD model directly in short time depends on the accurate tracking control and reference trajectory planning in (Laminated Object Manufacture) LOM application. An improvement on contour accuracy is acquired by the introduction of a tracking controller and a trajectory generation policy. A model of the X-Y positioning system of LOM machine is developed a...

General object tracking is a challenging problem, where each tracking algorithm performs well on different sequences. This is because each of them has different strengths and weaknesses. We show that this fact can be utilized to create a fusion approach that clearly outperforms the best tracking algorithms in tracking performance. Thanks to dynamic programming based trajectory optimization we c...