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Your search keyword '"Chengrui, Liu"' showing total 10 results
Start Over Author "Chengrui, Liu" Database Complementary Index
10 results on '"Chengrui, Liu"'

1. ACCELERATED DEGRADATION ANALYSIS BASED ON A RANDOM-EFFECT WIENER PROCESS WITH ONE-ORDER AUTOREGRESSIVE ERRORS.

Author

Junxing LI, Zhihua WANG, Chengrui LIU, and Ming QIU

Subjects
AUTOREGRESSION (Statistics), FRANKFURTER sausages, WIENER processes, AUTOREGRESSIVE models
Abstract

Copyright of Maintenance & Reliability / Eksploatacja i Niezawodność is the property of Polish Scientific & Technical Society Consumables, Polish Maintenance Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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2. Integral Sliding Mode Fault-Tolerant Control for Spacecraft With Uncertainties and Saturation.

Author

Wenjie, Duan, Dayi, Wang, and Chengrui, Liu

Subjects
SLIDING mode control, SPACE vehicle control systems, FAULT-tolerant control systems, UNCERTAINTY, LYAPUNOV stability
Abstract

An integral sliding mode fault-tolerant control method is proposed to deal with faults with matched uncertainties, unmatched uncertainties, and input saturation. Integral sliding mode, control allocation, and parameter identification are included in this method. The Lyapunov stability conditions of the integral sliding mode control for uncertainties and input saturation, respectively, are obtained, which denote the robustness extent of the controller. The direct method for control allocation is improved by adding a judgement before calculating for each facet. Finally, the fault-tolerant scheme is applied to a six-wheel spacecraft and simulations are given to show its effectiveness. [ABSTRACT FROM AUTHOR]

Published
2017
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8. Control reconfigurability of nonlinear system based on control redundancy.

Author

Yang, Zhao, Hua, Song, Hongzhuan, Qiu, and Chengrui, Liu

Abstract

This paper presents the analysis of reconfiguration of control law (control reconfigurability) in nonlinear system. A reconfigurable closed-loop control circuit is constructed for a normal nonlinear system, with three components, i.e. a nominal controller, a reconfiguration block and a faulty module to be controlled. The whole circuit is described with corresponding state spaces of these components. The Lie algebra (Lie derivative and Lie brackets) is used for linearizing the system to study its controllability and observability. By referring to the feedback control of pole placement method in linear system and the construction of objective function, ensuring the asymptotic stability, the stabilizability and detectability are studied. After that, the control redundancies are proposed, i.e. the controllable redundancy, observable redundancy, stabilizable redundancy and detectable redundancy. Furthermore, the causalities between control redundancies and control reconfigurability are summarized as means to estimate whether the system is reconfigurable or not. Finally, a real example of multiple input multiple output (MIMO) nonlinear system is used to testify the validity of the conclusions. [ABSTRACT FROM PUBLISHER]

Published
2012
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