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Journal ArticleDOI

Sliding mode control of the space nuclear reactor system

01 Apr 1998-IEEE Transactions on Aerospace and Electronic Systems (IEEE)-Vol. 34, Iss: 2, pp 579-589
TL;DR: In this article, the automatic control system (ACS) of the space nuclear reactor power system TOPAZ II that generates electricity from nuclear heat using in-core thermionic converters is considered.
Abstract: The automatic control system (ACS) of the space nuclear reactor power system TOPAZ II that generates electricity from nuclear heat using in-core thermionic converters is considered. Sliding mode control technique is applied to the reactor system controller design in order to improve robustness and accuracy of tracking of a thermal power reference profile in a start-up regime and a payload current reference profile in an operation regime. Extensive simulations of the TOPAZ II reactor system with the designed sliding mode controller showed an improvement of the reactor system performance.
Citations
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Journal ArticleDOI
TL;DR: In this article, a review on advanced technologies for modeling, power and load following control of nuclear cores is presented, which can contribute to comprehend the past work with respective advantages, and then exploit novel research directions for development of nuclear power plants.
Abstract: This investigation is to review advanced technologies for modeling and control of reactor cores in nuclear power plants for electricity generation. A reactor core in a nuclear power plant is the key part as the hot source with radioactivity nuclear fuel, which possesses security risks and economic potential. Incapacity of a nuclear power plant to carry out desired control of its core can result in either higher operating costs or a reduction in system security and reliability, and the implementation of desirable control for the core can improve security and effectiveness of the nuclear power plant. Generally speaking, the reactor core control contains the power (or coolant temperature) control and axial power difference (namely power distribution) control of the core. The core power control is to regulate the core power, and the core load following control is to regulate the core power and axial power difference simultaneously. Modeling reactor cores is the inevitable preliminary work for research of reactor core control. Over the decades, continuous work has been devoted to the research of including modeling, power and load following control for reactor cores. In this paper, the review on advanced technologies for modeling, power and load following control of reactor cores is presented. Modeling approaches for reactor cores are reviewed such as the point reactor core modeling. Power control methods for reactor cores are reviewed such as the feedback control with a state observer. Load following control techniques for reactor cores are reviewed such as Mode A, Mode G, Mode T, Mechanical Shim and advanced control methods of containing multivariable frequency control, etc. The review in this paper can contribute to comprehend the past work with respective advantages, and then exploit novel research directions for development of nuclear power plants.

72 citations

Journal ArticleDOI
TL;DR: In this paper, a multi-input multi-output fuzzy-adapted recursive sliding-mode controller (FARSMC) is designed for an advanced boiling water reactor (ABWR) nuclear power plant, to control reactor pressure, reactor water level and turbine power.
Abstract: In this paper, a multi-input multi-output fuzzy-adapted recursive sliding-mode controller (FARSMC) is designed for an advanced boiling water reactor (ABWR) nuclear power plant, to control reactor pressure, reactor water level and turbine power. The FARSMC is intended to replace the existing conventional controllers for the power range of 70% to 100% rated power. The controller has a recursive form that treats model uncertainty and external disturbances in an implicit way. Thus there is no need to specify uncertainties and disturbances for this controller design in advance. Moreover, the chattering problem common among conventional sliding-mode controllers is completely removed by this recursive sliding-mode control (RSMC) algorithm. The performance of the resulting RSMC is further improved by parameter adaptation using fuzzy logic algorithm, resulting in fuzzy-adapted RSMC (FARSMC). To apply RSMC technique, the original nonlinear plant model is first transformed to a canonical form. Simulations of the simplified ABWR model with the designed FARSMC indicate that FARSMC may result in better performance than the existing PI controllers in that the plant transient responses to the desired output step change have shorter settling time and smaller magnitude overshoot/undershoot. The control actions of the FARSMC are milder than those from the PI controllers. Robustness of the FARSMC with respect to power level variation and capability to reject external disturbances is also achieved. Successful fuzzy adapted sliding-mode controller design and implementation on the model shows that FARSMC may be a practical choice for nuclear power plant control.

62 citations


Cites background or methods from "Sliding mode control of the space n..."

  • ...Shtessel applied SMC in space nuclear reactor system control and obtained good simulation results [9]....

    [...]

  • ...Although sliding-mode control and fuzzy logic control techniques have been widely used in other fields [8], in nuclear industry, however, applications of these techniques seem to be much sparse and the studies of this topic are sporadic [9]....

    [...]

Journal ArticleDOI
Zhe Dong1
TL;DR: In this paper, a nonlinear state-feedback dissipation power-level control strategy is presented, which guarantees both the asymptotic closed-loop stability and convergent state-observation.
Abstract: Power-level regulation is a significant technique for guaranteeing both operation stability and efficiency of nuclear reactors. With the wide application of the digital instrument and control platforms, the implementation of modern state-feedback power control strategies, which have the ability of strengthening both the operation stability and efficiency for nuclear reactors, becomes much easier than before. Due to the advanced property of state-feedback power-level control and nonlinearity of reactor dynamics, it is so meaningful to develop nonlinear state-feedback power-level control laws. In this paper, a novel nonlinear state-feedback dissipation power-level control strategy is presented, which guarantees both the asymptotic closed-loop stability and convergent state-observation. Numerical simulation results show the feasibility and relationship between the observer-gain and control performance, and theoretic analysis corresponding to the simulation results is also given.

46 citations


Cites background or methods from "Sliding mode control of the space n..."

  • ...In order to improve robustness of the SFAC against process disturbance and modeling uncertainty, two modified SFACs with higher control performance were then given respectively [3], [4]....

    [...]

  • ...Shtessel gave a nonlinear power-level regulator composed of a state feedback sliding mode controller and a sliding mode state observer for space nuclear reactor system [4]....

    [...]

Journal ArticleDOI
Zhe Dong1, Yifei Pan1, Zuoyi Zhang1, Yujie Dong1, Xiaojin Huang1 
15 Sep 2017-Energy
TL;DR: In this article, a model-free adaptive power-level control law is developed for Su-NSSSs with forced primary circulation in the simple proportional-integral (PI) or proportional differential (PD) form.

45 citations

Journal ArticleDOI
TL;DR: In this article, a load frequency control strategy and average temperature control mechanism are studied to get load following nuclear power plants, and the suitability of the control strategies and concept designs are assessed through linear stability analysis methods.

45 citations

References
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Book
01 Jan 1991
TL;DR: Covers in a progressive fashion a number of analysis tools and design techniques directly applicable to nonlinear control problems in high performance systems (in aerospace, robotics and automotive areas).
Abstract: Covers in a progressive fashion a number of analysis tools and design techniques directly applicable to nonlinear control problems in high performance systems (in aerospace, robotics and automotive areas).

15,545 citations

Journal ArticleDOI
TL;DR: A tutorial account of variable structure control with sliding mode is presented, introducing in a concise manner the fundamental theory, main results, and practical applications of this powerful control system design approach.
Abstract: A tutorial account of variable structure control with sliding mode is presented. The purpose is to introduce in a concise manner the fundamental theory, main results, and practical applications of this powerful control system design approach. This approach is particularly attractive for the control of nonlinear systems. Prominent characteristics such as invariance, robustness, order reduction, and control chattering are discussed in detail. Methods for coping with chattering are presented. Both linear and nonlinear systems are considered. Future research areas are suggested and an extensive list of references is included. >

2,884 citations

Journal ArticleDOI
01 Mar 1988
TL;DR: In this paper, the design of variable-structure control (VSC) systems for a class of multivariable, nonlinear, time-varying systems is presented.
Abstract: The design of variable-structure control (VSC) systems for a class of multivariable, nonlinear, time-varying systems is presented. Using the Utkin-Drazenovic method of equivalent control and generalized Lyapunov stability concepts, the VSC design is described in a unified manner. Complications that arise due to multiple inputs are examined, and several approaches useful in overcoming them are developed. Recent developments are investigated, as is the kinship of VSC and the deterministic approach to the control of uncertain systems. All points are illustrated by numerical examples. The recent literature on VSC applications is surveyed. >

1,860 citations

Book
24 Apr 1986
TL;DR: This chapter discusses the development of Geometric Theory of State Feedback for Multi-Input Multi-Output Systems and its applications in control systems.
Abstract: Contents: Local Decompositions of Control Systems.- Global Decompositions of Control Systems.- Input-Output Maps and Realization Theory.- Elementary Theory of Nonlinear Feedback for Single-Input Single-Output Systems.- Elementary Theory of Nonlinear Feedback for Multi-Input Multi-Output Systems.- Geometric Theory of State Feedback: Tools.- Geometric Theory of State Feedback: Applications.- Appendix A.- Appendix B.- Bibliographical Notes.- References.- Subject Index.

1,696 citations

Journal ArticleDOI
TL;DR: In this article, the stability of discrete-time sliding mode control systems is investigated and a new sliding mode condition is suggested, and it is shown that the control must have upper and lower bounds.
Abstract: The stability of discrete-time sliding mode control systems is investigated and a new sliding mode condition is suggested. It is shown that the control must have upper and lower bounds. A numerical example is discussed as an illustration.

730 citations