scholarly journals Explicit Model Following Distributed Control Scheme for Formation Flying of Mini UAVs

IEEE Access ◽  
2016 ◽  
Vol 4 ◽  
pp. 397-406 ◽  
Author(s):  
Qasim Ali ◽  
Sergio Montenegro
Keyword(s):  
Distributed Control ◽  
Formation Flying ◽  
Explicit Model ◽  
Model Following ◽  
Control Scheme

scholarly journals Distributed Attitude Synchronization for Spacecraft Formation Flying via Event-Triggered Control

2021 ◽  
Vol 11 (14) ◽  
pp. 6299
Author(s):  
Xiong Xie ◽  
Tao Sheng ◽  
Liang He
Keyword(s):  
Control System ◽  
Formation Flying ◽  
Spacecraft Formation ◽  
Spacecraft Formation Flying ◽  
Control Scheme ◽  
Event Triggering ◽  
Computational Resources ◽  
Update Frequency ◽  
Attitude Synchronization ◽  
Event Triggered

The distributed attitude synchronization control problem for spacecraft formation flying subject to limited energy and computational resources is addressed based on event-triggered mechanism. Firstly, a distributed event-driven controller is designed to achieve attitude coordination with the limitation of energy and computing resources. Under the proposed control strategy, the controller is only updated at the event triggering instants, which effectively reduces the update frequency. Subsequently, an event-triggered strategy is developed to further decrease energy consumption and the amount of computation. The proposed event-triggered function only requires the latest state information about its neighbors, implying that the trigger threshold does not need to be calculated continuously. It is shown that the triggering interval between two successive events is strictly positive, showing that the control system has no Zeno phenomenon. Moreover, the update frequency of the proposed controller can be reduced by more than 90% compared to the update frequency of the corresponding time-driven controller with an update frequency of 10 Hz by choosing appropriate control parameters and the control system can still achieve high-precision convergence. Finally, the effectiveness of the constructed control scheme is verified by numerical simulations.

Decentralized Adaptive Control of a Directly Driven Hydraulic Manipulator: Part 2: Experiment

1995 ◽  
Vol 209 (3) ◽  
pp. 197-205 ◽  
Author(s):  
F Gomes de Almeida ◽  
K A Edge
Keyword(s):  
Adaptive Control ◽  
Model Reference Adaptive Control ◽  
Model Reference ◽  
Model Following ◽  
Control Scheme ◽  
Series Of Experiments ◽  
Hydraulic Manipulator ◽  
Model Reference Adaptive ◽  
Decentralized Model ◽  
Adaptive Control Scheme

The implementation of a decentralized model reference adaptive control scheme for a two-axis robotic manipulator is described. It is shown, through an extensive series of experiments, that very good model-following performance and axis decoupling is achieved regardless of manipulator payload and working position.

scholarly journals Distributed Optimal Control of Transient Stability for a Power Information Physical System

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Shiming Chen ◽  
Kaiqiang Li
Keyword(s):  
Optimal Control ◽  
Smart Grid ◽  
Distributed Control ◽  
Information Exchange ◽  
Transient Stability ◽  
Power Grid ◽  
Operating Conditions ◽  
Energy Structure ◽  
Distributed Optimal Control ◽  
Control Scheme

The development of power energy structures and information communication technology has promoted the renewal of smart grid information-physical structures. At the same time, the changes in the smart grid energy structure and the vulnerability of the information network threaten the stability of the power system and uses multiagent control theory to improve the transient stability of the power grid which has strong practicability. In this paper, an optimized distributed control scheme is proposed for application to the smart grid model so that the grid system can flexibly adapt to the external operating conditions and recover to stable operating conditions after being disturbed. In this paper, an intelligent power grid information-physical network simulation system is established. According to the information exchange within the multiagent system, groups of coherent generators in the disturbed power grid in different regions are identified and controlled. Distributed control is applied to maintain the exponential frequency synchronization and phase angle aggregation of the synchronous generators to achieve transient stability. Finally, the effectiveness and rapidity of the proposed distributed optimal control scheme are verified by simulation analysis of the IEEE 39 node model.

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