Three-dimensional vision applications in GTAW process modeling and control

Abstract This paper deals with modeling and control of a crane mounted on a tower-like flexible structure. A fast transfer of the load causes the sway of the load rope and the vibration of the flexible structure. Our object is to control both the sway and the vibration by the inherent capability of the tower crane. This paper makes its three-dimensional models for simulation and reduced-order-model in order to design the decentralized control system. Then, we design the decentralized H∞ compensator and verify the efficiency by simulations and experiments.

Download Full-text

Condensation of information from signals for process modeling and control

Hybrid Systems II - Lecture Notes in Computer Science ◽

10.1007/3-540-60472-3_3 ◽

1995 ◽

pp. 45-63 ◽

Cited By ~ 1

Author(s):

J. D. Birdwell ◽

B. C. Moore

Keyword(s):

Process Modeling ◽

Modeling And Control ◽

And Control

Download Full-text

SLS Process Modeling and Control

Solid Freeform Fabrication: A New Direction in Manufacturing ◽

10.1007/978-1-4615-6327-3_6 ◽

1997 ◽

pp. 167-243 ◽

Cited By ~ 1

Author(s):

Joseph J. Beaman ◽

Joel W. Barlow ◽

David L. Bourell ◽

Richard H. Crawford ◽

Harris L. Marcus ◽

...

Keyword(s):

Process Modeling ◽

Modeling And Control ◽

And Control

Download Full-text

Process modeling and control in drug development and manufacturing

Computers & Chemical Engineering ◽

10.1016/j.compchemeng.2010.04.013 ◽

2010 ◽

Vol 34 (7) ◽

pp. 1007-1008 ◽

Cited By ~ 13

Author(s):

Cynthia A. Oksanen ◽

Salvador García Muñoz

Keyword(s):

Drug Development ◽

Process Modeling ◽

Modeling And Control ◽

And Control

Download Full-text

A network-based perspective on coherent structure detection from very-sparse Lagrangian data

14th International Symposium on Particle Image Velocimetry ◽

10.18409/ispiv.v1i1.130 ◽

2021 ◽

Vol 1 (1) ◽

Author(s):

Giovanni Iacobello ◽

David E. Rival

Keyword(s):

Coherent Structure ◽

Measurement Techniques ◽

Three Dimensional ◽

Coherent Motion ◽

Modeling And Control ◽

Structure Detection ◽

Spatio Temporal ◽

Lagrangian Data ◽

And Control ◽

Lagrangian Flow

Coherent structure detection (CSD) is a long-lasting issue in fluid mechanics research as the presence of spatio-temporal coherent motion enables simpler ways to characterize the flow dynamics. Such reducedorder representation, in fact, has significant implications for the understanding of the dynamics of flows, as well as their modeling and control (Hussain, 1986). While the Eulerian framework has been extensively adopted for CSD, Lagrangian coherent structures have recently received increasing attention, mainly driven by advancements in Lagrangian flow measurement techniques (Haller, 2015; Hadjighasem et al., 2017). Lagrangian particle tracking (LPT), in particular, is widely used nowadays due to its ability to quantity fluid-parcel trajectories in three-dimensional volumes (Schanz et al., 2016).

Download Full-text

Anaerobic treatment of sulfate-rich wastewaters: process modeling and control

Environmental Technologies to Treat Sulphur Pollution: Principles and Engineering ◽

10.2166/9781789060966_0277 ◽

2020 ◽

pp. 277-317

Author(s):

A. Robles ◽

S. Vinardell ◽

J. Serralta ◽

N. Bernet ◽

P. N. L. Lens ◽

...

Keyword(s):

Process Modeling ◽

Anaerobic Treatment ◽

Modeling And Control ◽

And Control

Download Full-text

Three-Dimensional Modeling and Control of a Tethered UAV-Buoy System

10.21203/rs.3.rs-1100475/v1 ◽

2021 ◽

Author(s):

Ahmad Kourani ◽

Naseem Daher

Keyword(s):

Control System ◽

Three Dimensional ◽

Vertical Motion ◽

Robotic System ◽

Three Dimensions ◽

Spherical Coordinate ◽

Nonlinear Dynamical ◽

Modeling And Control ◽

Three Dimensional Modeling ◽

And Control

Abstract This work presents the nonlinear dynamical model and motion controller of a system consisting of an unmanned aerial vehicle (UAV) that is tethered to a floating buoy in the three-dimensional (3D) space. Detailed models of the UAV, buoy, and the coupled tethered system dynamics are presented in a marine environment that includes surface-water currents and oscillating gravity waves, in addition to wind gusts. This work extends the previously modeled planar (vertical) motion of this novel robotic system to allow its free motion in all three dimensions. Furthermore, a Directional Surge Velocity Control System (DSVCS) is hereby proposed to allow both the free movement of the UAV around the buoy when the cable is slack, and the manipulation of the buoy’s surge velocity when the cable is taut. Using a spherical coordinate system centered at the buoy, the control system commands the UAV to apply forces on the buoy at specific azimuth and elevation angles via the tether, which yields a more appropriate realization of the control problem as compared to the Cartesian coordinates where the traditional x- , y- , and z -coordinates do not intuitively describe the tether’s tension and orientation. The proposed robotic system and controller offer a new method of interaction and collaboration between UAVs and marine systems from a locomotion perspective. The system is validated in a virtual high-fidelity simulation environment, which was specifically developed for this purpose, while considering various settings and wave scenarios.

Download Full-text