几类间歇故障的容错控制研究
发布时间：2019-04-08 14:38
【摘要】：随着诸如生产、交通、通信等实际系统的日益规模化和复杂化,安全问题受到全社会的普遍关注。容错控制是能够自动适应系统故障并维持系统具有可接受性能(如稳定性、可靠性)的控制理论和方法。近四十年来,容错控制得到了工业界和学术界的广泛关注,取得了长足发展。故障在实际系统中不可避免,会引发系统的异常行为,危及系统的稳定性,是容错控制研究关注的焦点。以持续时间为标准,故障可以分为永久故障和间歇故障。目前,容错控制研究和应用中所考虑的故障往往都是永久故障,仅有少量文献研究了间歇故障的容错控制问题。然而,间歇故障在实际系统中大量存在,严重影响系统性能和安全,且不能用针对永久故障的容错控制方法予以解决。因此,本文系统研究了间歇故障的容错控制问题,既考虑了不同作用形式(加性和乘性)的间歇故障,也考虑了不同作用部位(传感器和执行器)的间歇故障。主要研究内容包括：1.第二章研究了一类带有加性间歇故障的线性系统容错控制问题,分别考虑了仅发生传感器故障、仅发生执行器故障和两种故障同时发生三种情形。所考虑的加性间歇故障由服从Bernoulli分布的随机变量进行描述。H∞性能指标被用于衡量容错控制性能。基于线性矩阵不等式方法,可以得到容错控制器存在的充分条件,并求得相应的动态输出反馈控制器。仿真结果表明了所提方法的有效性。2.第三章研究了一类带有多重加性间歇故障的非线性系统容错控制问题,同样分别考虑了仅发生传感器故障、仅发生执行器故障和两种故障同时发生三种情形。此外,本章还考虑了非线性动态和建模不确定性。多重加性间歇故障由一组服从Bernoulli分布的随机变量描述。类似于第二章,H∞性能指标被用于衡量容错控制性能。基于线性矩阵不等式方法,得到了容错控制器存在的充分条件,并求得相应的动态输出反馈控制器。在飞行器发动机系统上的仿真试验验证了所提控制方法的有效性3.本文在第四章中对一类带有乘性间歇故障的非线性不确定系统的容错控制问题开展了研究,同样也考虑了仅发生传感器故障、仅发生执行器故障和两种故障同时发生三种情形。乘性间歇故障由服从Markov链的随机变量描述。同样地,容错控制目标以H∞性能指标形式给出。上述容错控制器存在的充分条件也描述为矩阵不等式,求解该矩阵不等式可以得到相应的动态输出反馈控制器。仿真结果验证了所提容错控制策略的有效性。4.第五章针对一类带有传感器间歇故障的Wiener系统开展了主动容错控制研究,其中所考虑的Wiener系统以医疗中的临床麻醉为背景。本章中,引入了内模控制算法以构建基本的闭环麻醉控制系统。针对传感器可能出现的间歇故障,采用扩展状态观测器构造残差并进行故障检测,因为Wiener系统存在静态非线性环节。基于上述观测器输出,进一步构造切换控制策略以实现容错控制。最后,基于麻醉仿真平台的仿真结果表明了所提容错控制方法的有效性。
[Abstract]:With the increasing scale and complexity of the actual systems, such as production, transportation, communication, and the like, the security problem is generally concerned by the whole society. The fault-tolerant control is a control theory and method capable of automatically adapting to the system fault and maintaining the acceptability of the system (such as stability and reliability). Over the past four decades, fault-tolerant control has received extensive attention from industry and academia and has made great progress. The failure is inevitable in the actual system, which can cause the abnormal behavior of the system and endanger the stability of the system. It is the focus of the fault-tolerant control research. The fault can be divided into permanent and intermittent faults with the duration of the standard. At present, the fault-tolerant control research and the application in the application are often permanent faults, only a small number of the literature studies the fault-tolerant control problem of the intermittent fault. However, the intermittent fault exists in the actual system, which seriously affects the system performance and safety, and cannot be solved with the fault-tolerant control method for the permanent fault. In this paper, the fault-tolerant control of intermittent faults is studied in this paper. The intermittent faults of different acting forms (additive and multiplicative) are considered, and the intermittent faults of different working parts (sensors and actuators) are also taken into account. The main research contents include:1. In the second chapter, the fault-tolerant control of a class of linear systems with additive intermittent faults is studied. The additive intermittent fault considered is described by a random variable that is subject to the Bernoulli distribution. The performance index of H is used to measure the fault-tolerant control performance. Based on the linear matrix inequality method, a sufficient condition for the existence of a fault-tolerant controller can be obtained, and a corresponding dynamic output feedback controller can be obtained. The simulation results show the validity of the proposed method. In the third chapter, the fault-tolerant control of a class of nonlinear systems with multiple additive intermittent faults is studied. In addition, non-linear dynamics and modeling uncertainties are considered in this chapter. The multiple additive intermittent faults are described by a set of random variables which are subject to the Bernoulli distribution. Similar to the second chapter, the performance index of H is used to measure the fault-tolerant control performance. Based on the linear matrix inequality method, a sufficient condition for the existence of a fault-tolerant controller is obtained, and a corresponding dynamic output feedback controller is obtained. The simulation test on the aircraft engine system verifies the effectiveness of the proposed control method 3. In the fourth chapter, the fault-tolerant control of a class of non-linear uncertain systems with multiplicative intermittent faults is studied. The multiplicative intermittent fault is described by the random variable which is subject to the Markov chain. In the same way, the fault-tolerant control objective is given in the form of H-scale performance indicators. The sufficient condition of the above-mentioned fault-tolerant controller is also described as a matrix inequality, and a corresponding dynamic output feedback controller can be obtained by solving the matrix inequality. The simulation results verify the validity of the proposed fault-tolerant control strategy. In chapter five, an active fault-tolerant control study is carried out for a class of Wiener systems with intermittent faults, in which the Wiener system under consideration is based on the clinical anesthesia in medical care. In this chapter, an internal model control algorithm is introduced to construct a basic closed-loop anesthesia control system. The extended state observer is used to construct the residual and fault detection for possible intermittent faults of the sensor, because the Wiener system has a static non-linear link. Based on the observer output, a switching control strategy is further configured to realize fault-tolerant control. Finally, the simulation results of the simulation platform based on the anesthesia show the effectiveness of the proposed fault-tolerant control method.
【学位授予单位】：北京化工大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TP273
本文编号：2454663
[Abstract]:With the increasing scale and complexity of the actual systems, such as production, transportation, communication, and the like, the security problem is generally concerned by the whole society. The fault-tolerant control is a control theory and method capable of automatically adapting to the system fault and maintaining the acceptability of the system (such as stability and reliability). Over the past four decades, fault-tolerant control has received extensive attention from industry and academia and has made great progress. The failure is inevitable in the actual system, which can cause the abnormal behavior of the system and endanger the stability of the system. It is the focus of the fault-tolerant control research. The fault can be divided into permanent and intermittent faults with the duration of the standard. At present, the fault-tolerant control research and the application in the application are often permanent faults, only a small number of the literature studies the fault-tolerant control problem of the intermittent fault. However, the intermittent fault exists in the actual system, which seriously affects the system performance and safety, and cannot be solved with the fault-tolerant control method for the permanent fault. In this paper, the fault-tolerant control of intermittent faults is studied in this paper. The intermittent faults of different acting forms (additive and multiplicative) are considered, and the intermittent faults of different working parts (sensors and actuators) are also taken into account. The main research contents include:1. In the second chapter, the fault-tolerant control of a class of linear systems with additive intermittent faults is studied. The additive intermittent fault considered is described by a random variable that is subject to the Bernoulli distribution. The performance index of H is used to measure the fault-tolerant control performance. Based on the linear matrix inequality method, a sufficient condition for the existence of a fault-tolerant controller can be obtained, and a corresponding dynamic output feedback controller can be obtained. The simulation results show the validity of the proposed method. In the third chapter, the fault-tolerant control of a class of nonlinear systems with multiple additive intermittent faults is studied. In addition, non-linear dynamics and modeling uncertainties are considered in this chapter. The multiple additive intermittent faults are described by a set of random variables which are subject to the Bernoulli distribution. Similar to the second chapter, the performance index of H is used to measure the fault-tolerant control performance. Based on the linear matrix inequality method, a sufficient condition for the existence of a fault-tolerant controller is obtained, and a corresponding dynamic output feedback controller is obtained. The simulation test on the aircraft engine system verifies the effectiveness of the proposed control method 3. In the fourth chapter, the fault-tolerant control of a class of non-linear uncertain systems with multiplicative intermittent faults is studied. The multiplicative intermittent fault is described by the random variable which is subject to the Markov chain. In the same way, the fault-tolerant control objective is given in the form of H-scale performance indicators. The sufficient condition of the above-mentioned fault-tolerant controller is also described as a matrix inequality, and a corresponding dynamic output feedback controller can be obtained by solving the matrix inequality. The simulation results verify the validity of the proposed fault-tolerant control strategy. In chapter five, an active fault-tolerant control study is carried out for a class of Wiener systems with intermittent faults, in which the Wiener system under consideration is based on the clinical anesthesia in medical care. In this chapter, an internal model control algorithm is introduced to construct a basic closed-loop anesthesia control system. The extended state observer is used to construct the residual and fault detection for possible intermittent faults of the sensor, because the Wiener system has a static non-linear link. Based on the observer output, a switching control strategy is further configured to realize fault-tolerant control. Finally, the simulation results of the simulation platform based on the anesthesia show the effectiveness of the proposed fault-tolerant control method.
【学位授予单位】：北京化工大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TP273
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