朱巧慧

个人信息

参与实验室科研项目

基于资源调度和预测控制的无线网络化控制系统的联合设计

研究课题

随着传感技术、信号处理和无线通信技术的蓬勃发展, 无线网络控制系统的研究受到了越来越多领域的关注。无线网络化控制系统打破了传统有线网络的局限，在传输速率和传输距离等方面有了很大的提升。但是控制和通信的互相作用降低了无线网路化控制系统的性能，如：1.周期性高频采样带来大负荷，导致网络拥堵；2.有限比特率导致网络延迟和丢包；3.数据包字长有限，对采样信号量化时会出现量化误差。为解决上述问题考虑资源调度和预测控制的联合设计，以提高网络性能。

学术成果

共撰写/参与撰写专利 1 项，录用/发表论文 4 篇，投出待录用论文0篇。

patent

1. 一种基于多路径切换的无限制DoS攻击防护方法 赵云波, and 朱巧慧 2022 [Abs] [pdf]

   基于多路径切换的无限制DoS攻击防护方法，首先根据网络丢包率情况和系统模型确定系统可以容忍的最大丢包数，设计DoS攻击检测模块，从而得到多切换路径条件；然后执行器端记录当前传感器到控制器的连续丢包数并发送给传感器，若当前连续丢包数满足路径切换条件，则传感器和控制器切换路径传输数据，若当前连续丢包数没有满足路径切换条件，则继续检测。多路径切换防护方法通过不断检测和切换路径，可以解决无限制DoS攻击造成的连续丢包现象，从而使得系统一直保持稳定。

Journal Articles

1. Estimation Based Approximating Control for Wireless Networked Control Systems Qipeng Liang, Qiaohui Zhu, Yu Kang, and Yun-Bo Zhao J. Univ. Sci. Tech. China 2021 [Abs] [doi] [pdf]

   The control design and system analysis of wireless networked control systems with unknown roundtrip delay characteristics are investigated. An estimation based approximating control strategy is proposed to stabilize the systems by using delay characteristics in a practically feasible way. The strategy first uses a delay transition probability estimator to obtain the delay characteristics estimation by measuring delay data online, and then uses an approximating controller to take advantage of the estimation. On this basis, a packet delay variation detector is designed, making the strategy adaptive to the variation of delay characteristics. The sufficient conditions to ensure the closed-loop system being mean-square uniformly ultimately bounded are given, with also the controller gain design method. The effectiveness of the proposed approach is verified numerically.

2. Multi-Path Switching Protection for Networked Control Systems Under Unbounded DoS Attacks Qiaohui Zhu, Qipeng Liang, Yu Kang, and Yun-Bo Zhao J. Univ. Sci. Technol. China 2021 [Abs] [doi] [pdf]

   The strategy design and closed-loop stability of networked control systems under unbounded denial of service (DoS) attacks are investigated. A multi-path switching protection strategy is firstly designed by noticing the usually available multiple paths in data communication networks. The strategy consists of a DoS attack detection module at the actuator side to identify DoS attacks from normal data packet dropouts, and a multi-path switching module at the sensor side to effectively switch the data transmission path when necessary. Then, the sufficient conditions for the closed-loop system being global mean square asymptotic stability are given, with a corresponding controller gain design method. Numerical examples illustrate the effectiveness of the proposed approach.

3. Classification-Based Control for Wireless Networked Control Systems with Lossy Multipacket Transmission Yun-Bo Zhao , Jiang-Tao He, Qiao-Hui Zhu, Tao Huang, and Shi Ming Yu IEEJ Trans. Electr. Electron. Eng. 2019 [Abs] [doi] [pdf]

   A classification-based control approach is proposed for wireless networked control systems with lossy multi-packet transmission. This approach takes advantage of a state reconstruction process to deal with the distinct feature of partial failure of data transmission caused by multi-packet transmission, and then classifies the difference of the latest received system states and and reconstructed ones to design a classification-based controller. The closed-loop stability of the system is proven using the switched systems theory. By considering more communication characteristics of multi-packet transmission, the proposed approach is shown to give rise to a better system performance by a numerical example.

Conference Articles

1. Synthesis of Wireless Networked Control System Based on Round-trip Delay Online Estimation Liang Lu, Qipeng Liang, Qiaohui Zhu, and Yun-Bo Zhao In 2020 Chin. Autom. Congr. CAC 2020 [Abs] [doi] [pdf]

   A control design approach with the integration of online delay estimation is proposed for wireless networked control systems (WNCSs) with unknown round-trip delay, which improves control performance in a practically feasible way. We introduce a delay probability estimation unit to obtain the delay characteristics by estimating the delay when the control system is running. We also present a piecewise approximation control strategy to take advantage of the estimation. Furthermore, the control gain is synthesized with stability guarantee. The conditions to ensure the stochastic stability of the closed-loop system are given, and the effectiveness of the proposed approach is verified numerically.

学位论文

Theses

1. 无界 DoS 攻击下网络化控制系统的防护设计 朱巧慧 浙江工业大学, 杭州 2021 [Abs] [pdf]

   由于开放、共享通信网络易于遭受攻击，安全问题已成为网络化控制系统 近些年关注的焦点之一，其中拒绝服务攻击（DoS）是最常见和易于实现的攻 击形式，得到了广泛的关注。现有研究大多假设 DoS 攻击在频率、持续时间或 其他指标上是有限的，这对现实通信系统是合理的；但对控制系统而言，只要 攻击强度超出了所能承受的界限，控制系统就会因为长时间开环而失稳，这意 味着对遭受 DoS 攻击的网络化控制系统而言，带有无界假设的 DoS 攻击具有重 要的现实意义，需要针对该类系统展开建模、分析和设计等研究。 在基于国内外研究的基础上，针对带有无界 DoS 攻击的网络化控制系统给 出了相应的解决方案，具体工作包括： （1）针对无界 DoS 攻击下的网络化控制系统，提出了一种多路径切换防护 策略。首先设计 DoS 攻击检测模块对当前路径进行攻击检测，然后设计多路径 切换模块进行路径的切换。进一步将全局均方渐近稳定的概念引入到闭环控制 系统中，得到了闭环系统的全局均方渐近稳定条件以及给出了闭环系统控制器 增益的设计方法。仿真结果证明了多路径切换防护策略有效降低了无界 DoS 攻 击对控制系统的影响。 （2）针对无界 DoS 攻击下受扰网络化控制系统，基于多路径切换防护策略， 得到了闭环系统的均方一致最终有界的稳定性条件，并进一步给出了控制器增 益设计方法。仿真结果证明了抗扰控制器设计方法具有更强的鲁棒性。

毕业去向

三维通信股份有限公司， 测试工程师