scholarly journals Event Visualization and Trajectory Tracking of the Load Carried by Rotary Crane

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 480
Author(s):  
Dawid Cekus ◽  
Filip Depta ◽  
Mariusz Kubanek ◽  
Łukasz Kuczyński ◽  
Paweł Kwiatoń
Keyword(s):  
Control System ◽  
Numerical Model ◽  
Trajectory Tracking ◽  
Duty Cycle ◽  
Laboratory Model ◽  
Vision Sensor ◽  
Tracking Method ◽  
Dynamic Vision ◽  
Rotary Crane ◽  
Safe Transport

Tracking the trajectory of the load carried by the rotary crane is an important problem that allows reducing the possibility of its damage by hitting an obstacle in its working area. On the basis of the trajectory, it is also possible to determine an appropriate control system that would allow for the safe transport of the load. This work concerns research on the load motion carried by a rotary crane. For this purpose, the laboratory crane model was designed in Solidworks software, and numerical simulations were made using the Motion module. The developed laboratory model is a scaled equivalent of the real Liebherr LTM 1020 object. The crane control included two movements: changing the inclination angle of the crane’s boom and rotation of the jib with the platform. On the basis of the developed model, a test stand was built, which allowed for the verification of numerical results. Event visualization and trajectory tracking were made using a dynamic vision sensor (DVS) and the Tracker program. Based on the obtained experimental results, the developed numerical model was verified. The proposed trajectory tracking method can be used to develop a control system to prevent collisions during the crane’s duty cycle.

scholarly journals A Moving Frame Trajectory Tracking Method of a Flying-Wing UAV Using the Differential Geometry

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Yi Zhu ◽  
Xin Chen ◽  
Chuntao Li
Keyword(s):  
Flight Control ◽  
Trajectory Tracking ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Elliptic Cylinder ◽  
Dynamic Equations ◽  
Moving Frame ◽  
Moving Frames ◽  
Tracking Method ◽  
Tracking Process

The problem of UAV trajectory tracking is a difficult issue for scholars and engineers, especially when the target curve is a complex curve in the three-dimensional space. In this paper, the coordinate frames during the tracking process are transformed to improve the tracking result. Firstly, the basic concepts of the moving frame are given. Secondly the transfer principles of various moving frames are formulated and the Bishop frame is selected as a final choice for its flexibility. Thirdly, the detailed dynamic equations of the moving frame tracking method are formulated. In simulation, a moving frame of an elliptic cylinder helix is formulated precisely. Then, the devised tracking method on the basis of the dynamic equations is tested in a complete flight control system with 6 DOF nonlinear equations of the UAV. The simulation result shows a satisfactory trajectory tracking performance so that the effectiveness and efficiency of the devised tracking method is proved.

Passive localization and detection of quadcopter UAVs by using dynamic vision sensor

2017 ◽  
Author(s):  
S. Hoseini ◽  
G. Orchard ◽  
A. Yousefzadeh ◽  
B. Deverakonda ◽  
T. Serrano-Gotarredona ◽  
...  
Keyword(s):  
Vision Sensor ◽  
Dynamic Vision ◽  
Passive Localization

scholarly journals Adaptive Temporal Pooling for Object Detection using Dynamic Vision Sensor

2017 ◽  
Author(s):  
Jia Li ◽  
Feng Shi ◽  
Weiheng Liu ◽  
Dongqing Zou ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Object Detection ◽  
Vision Sensor ◽  
Dynamic Vision

Model and theoretical seismicity

1967 ◽  
Vol 57 (3) ◽  
pp. 341-371 ◽  
Author(s):  
R. Burridge ◽  
L. Knopoff
Keyword(s):  
Numerical Model ◽  
Potential Energy ◽  
Main Sequence ◽  
Magnitude Scale ◽  
Laboratory Model ◽  
Earthquake Mechanism

abstract A laboratory and a numerical model have been constructed to explore the role of friction along a fault as a factor in the earthquake mechanism. The laboratory model demonstrates that small shocks are necessary to the loading of potential energy into the focal structure; a large part, but not all, of the stored potential energy is later released in a major shock, at the end of a period of loading energy into the system. By the introduction of viscosity into the numerical model, aftershocks take place following a major shock. Both models have features which describe the statistics of shocks in the main sequence, the statistics of aftershocks and the energy-magnitude scale, among others.

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