A modeling error compensation approach for the feedback control of the nuclear reactor operation

Abstract Purpose Electromagnetic tracking (EMT) can partially replace X-ray guidance in minimally invasive procedures, reducing radiation in the OR. However, in this hybrid setting, EMT is disturbed by metallic distortion caused by the X-ray device. We plan to make hybrid navigation clinical reality to reduce radiation exposure for patients and surgeons, by compensating EMT error. Methods Our online compensation strategy exploits cycle-consistent generative adversarial neural networks (CycleGAN). Positions are translated from various bedside environments to their bench equivalents, by adjusting their z-component. Domain-translated points are fine-tuned on the x–y plane to reduce error in the bench domain. We evaluate our compensation approach in a phantom experiment. Results Since the domain-translation approach maps distorted points to their laboratory equivalents, predictions are consistent among different C-arm environments. Error is successfully reduced in all evaluation environments. Our qualitative phantom experiment demonstrates that our approach generalizes well to an unseen C-arm environment. Conclusion Adversarial, cycle-consistent training is an explicable, consistent and thus interpretable approach for online error compensation. Qualitative assessment of EMT error compensation gives a glimpse to the potential of our method for rotational error compensation.

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Improving the Accuracy of Multi-Axis Machines Through On-Line Error Compensation Using Neural Networks

Volume 2: 24th Design Automation Conference ◽

10.1115/detc98/dac-5641 ◽

1998 ◽

Author(s):

Abderrazak El Ouafi ◽

Michel Guillot ◽

Abdellah Bedrouni

Keyword(s):

Error Compensation ◽

Error Modeling ◽

Precision Engineering ◽

Dimensional Error ◽

New Approach ◽

Turning Center ◽

On Line ◽

Dynamic Errors ◽

Compensation Approach ◽

Compensation Function

Abstract This research is devoted to one of the most fundamental problems in precision engineering: multi-axis machines accuracy. The paper presents a new approach designed to support the implementation of software error compensation of geometric, thermal and dynamic errors for enhancing the accuracy of multi-axis machines. The accuracy of multi-axis machines can be significantly improved using an intelligent integration of sensor information to perform the compensation function. The compensation process consists of the following major steps carried out on-line: continuous monitoring of the machine conditions using position, force, speed and temperature sensors mounted on the machine structure. Error forecasting through sensor fusion. Volumetric error synthesis and software compensation. To improve the effectiveness of error modeling, an artificial neural network is extensively applied. Implemented on a turning center, the compensation approach has enabled improvement of the machine accuracy by reducing the maximum dimensional error from 70 μm initially to less than 4 μm.

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COMPARATIVE STUDY OF FUZZY CONTROL, PID CONTROL, AND ADVANCED FUZZY CONTROL FOR SIMULATING A NUCLEAR REACTOR OPERATION

International Journal of General Systems ◽

10.1080/03081070008960933 ◽

2000 ◽

Vol 29 (2) ◽

pp. 263-279 ◽

Cited By ~ 12

Author(s):

XIAOZHONG LI ◽

DA RUAN

Keyword(s):

Fuzzy Control ◽

Comparative Study ◽

Pid Control ◽

Nuclear Reactor ◽

Reactor Operation

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The case for extended nuclear reactor operation

JOM ◽

10.1007/s11837-009-0098-3 ◽

2009 ◽

Vol 61 (7) ◽

pp. 24-27

Author(s):

R. Szilard ◽

P. Planchon ◽

J. Busby

Keyword(s):

Nuclear Reactor ◽

Reactor Operation

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Review on Error Compensation Technology of Parallel Machine Tool

Materials Science Forum ◽

10.4028/www.scientific.net/msf.800-801.798 ◽

2014 ◽

Vol 800-801 ◽

pp. 798-802

Author(s):

Liang Zhou ◽

Liu Tang ◽

Ju Long Yuan ◽

Da Gang Xie

Keyword(s):

Machine Tool ◽

Error Detection ◽

Error Compensation ◽

Parallel Machine ◽

Research Trends ◽

Error Modeling ◽

Modeling Error ◽

Development History ◽

History Of ◽

Parallel Machine Tool

This paper reviews the development history of parallel machine tool and new achievements in China and abroad. Typical methods of error modeling, error detection and error compensation are introduced. After analyzing the biggest problem of recent error compensation technology, this paper prospects the further research trends.

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