scholarly journals idvf: Iterative Inversion of Deformation Vector Field with Adaptive Bi-residual Feedback Control

2019 ◽  
Vol 4 (35) ◽  
pp. 1076
Author(s):  
Alexandros-Stavros Iliopoulos ◽  
Abhishek Dubey ◽  
Xiaobai Sun
Keyword(s):  
Vector Field ◽  
Feedback Control ◽  
Iterative Inversion ◽  
Deformation Vector Field

scholarly journals An automated driver based on convergent vector fields

2002 ◽  
Vol 216 (4) ◽  
pp. 329-347 ◽  
Author(s):  
T J Gordon ◽  
M C Best ◽  
P J Dixon
Keyword(s):  
Vector Field ◽  
Feedback Control ◽  
Field Analysis ◽  
Driver Model ◽  
Cruise Control ◽  
Essential Information ◽  
Mass Centre ◽  
Reference Path ◽  
Driving Task ◽  
Specific Implementation

This paper describes a new general framework for the action of an automated driver (or driver model) to provide the control of longitudinal and lateral dynamics of a road vehicle. The context of the problem is assumed to be in high-speed competitive driving, as in motor racing, where the requirement is for maximum possible speed along a track, making use of a reference path (racing line) but with the capacity for obstacle avoidance and recovery from large excursions. While not necessarily representative of a human driver, the analysis provides worthwhile insight into the nature of the driving task and offers a new approach for vehicle lateral and longitudinal control; it also has applications in less demanding applications such as Advanced Cruise Control systems. As is common in the literature, the driving task is broken down into two distinct subtasks: path planning and local feedback control. In the first of these tasks, an essentially geometric approach is taken here, which makes use of a vector field analysis. At each location x the automated driver is to prescribe a vector w for the desired vehicle mass centre velocity; the spatial distribution and global properties of w( x) provide essential information for stability analysis, as well as control reference. The resulting vector field is considered in the context of limited friction and limited mass centre accelerations, leading to constraints on ∇ w. Provided such constraints are satisfied, and using suitable adaptation of w( x) when required, it is shown that feedback control can be applied to guarantee stable asymptotic tracking of a reference path, even under limit handling conditions. A specific implementation of the method is included, using dual non-linear SISO (single-input single-output) controllers.

scholarly journals Iterative inversion of deformation vector fields with feedback control

2018 ◽  
Vol 45 (7) ◽  
pp. 3147-3160 ◽  
Author(s):  
Abhishek Dubey ◽  
Alexandros‐Stavros Iliopoulos ◽  
Xiaobai Sun ◽  
Fang‐Fang Yin ◽  
Lei Ren
Keyword(s):  
Feedback Control ◽  
Vector Fields ◽  
Iterative Inversion

scholarly journals A pseudoinverse deformation vector field generator and its applications

2010 ◽  
Vol 37 (3) ◽  
pp. 1117-1128 ◽  
Author(s):  
C. Yan ◽  
H. Zhong ◽  
M. Murphy ◽  
E. Weiss ◽  
J. V. Siebers
Keyword(s):  
Vector Field ◽  
Deformation Vector Field

U‐net‐based deformation vector field estimation for motion‐compensated 4D‐CBCT reconstruction

2020 ◽  
Vol 47 (7) ◽  
pp. 3000-3012 ◽  
Author(s):  
Xiaokun Huang ◽  
You Zhang ◽  
Liyuan Chen ◽  
Jing Wang
Keyword(s):  
Vector Field ◽  
Field Estimation ◽  
Deformation Vector Field
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