A DVANCES in networking and distributed computing enable numerous applications for multivehicle systems including space-based observations, future combat systems, smart homes, enhanced surveillance systems, hazardous material handling systems, and reconfigurable sensing systems. In some applications, it is desirable that multiple vehicles maintain a geometric configuration and achieve relative ...

Human-machine networks pervade much of contemporary life. Network change is the product of structural modifications along with differences in participant behavior. If we assume that behavioural change in a human-machine network is the result of changing the attitudes of participants in the network, then the question arises whether network structure can affect participant attitude. Taking citize...

In this paper we analyze attitude tracking of a quadrotor unmanned aerial vehicle by employing a recently developed feedback strategy based upon hybrid systems theory. The hybrid feedback control strategy employs a family of synergistic potential functions on the special orthogonal group of order three, SO(3), that guarantees global asymptotic stability of a rigid bodies attitude to a given ref...

This article applies the theoretical framework of 'ritual failure', a sub-discipline of ritual criticism, to Paul's discussion of circumcision in his letter to the Galatians, Philippians and Romans. It is argued that the application of this theoretical perspective clarifies the dynamics at stake and provides a new way of understanding the development in Paul's position regarding circumcision. Th...

In this paper, we analyze dynamics of a DGVSCMG(Double-Gimbal VariableSpeed Control Moment Gyro) and develop an easy-to-use LPV (Linear ParameterVarying) model, in which we deal with 3-axis attitude control of a spacecraft equipped with a DGVSCMG. Although it is hard to consider overall stability and control performance of attitude control at the same time with conventional methods, this paper ...

This paper deals with the applicability of Robust Adaptive Control to the attitude motion control of large spacecraft. Large spacecraft and space structures, such as large communication satellites and the ISS (International Space Station), have been constructed on orbit. However dynamic characteristics of these structures can not be fully verified on the ground because of their size, mass and f...

This study addresses the control problem of an unmanned quadrotor in an indoor environment where there is lack of absolute localisation data. Based on an attached inertia measurement unit, a sonar and an optic-flow sensor, the state vector is estimated using sensor fusion algorithms. A novel switching model predictive controller is designed in order to achieve precise trajectory control, under ...

The satellite thruster's configuration plays also an important role in providing the attitude control torques. In this paper, after discussing the gimbal thruster's structure and its benefits, several configurations based on 2, 3 and 4 gimbal thrusters are investigated in order to identify the most suitable orientation that consume less fuel and raise reliability. Then, a 3-axis attit...

Sliding mode control algorithms with classical and modified discontinuous reaching laws for purely magnetic attitude control of small satellites are proposed and compared with each other in this work. They are designed by following the steps characteristic to the variable structure control method and the magnetic attitude control problem. The asymptotical stability of the control laws is proven...

In this paper, a robust control method based on the uncertainty and disturbance estimator (UDE) is developed to achieve the attitude tracking control for a quadrotor. To facilitate the control design, the coupled terms in the roll, pitch and yaw dynamics are lumped into the uncertainty term and the remained dynamics can be regarded as decoupled subsystems. As a result, for each subsystem, the l...