Publications

Links

 

期刊论文

  1. Chao Chen, Di Zhao*, and Sei Zhen Khong, “The singular angle of nonlinear systems,” Automatica (Regular paper), 2025, To appear.
  2. Lanlan Su, Di Zhao*, and Sei Zhen Khong, “On the exponential convergence of input-output signals of nonlinear feedback systems,” IEEE Transactions on Automatic Control, 2025, online.
  3. Weihao Zhang, Di Zhao*, and Shu Liang, “Soft safety analysis of interconnected systems,” IEEE Transactions on Automatic Control (Regular paper), 2025, 70(7): 4315-4329.
  4. Jianqi Chen, Qi Mao*, Di Zhao, Chao Chen, “Robust stability and stabilizability conditions for time-delay systems under stochastic uncertainties,” IEEE Transactions on Automatic Control, 2025, 70(6): 4037-4044.
  5. Jiajin Liang, Di Zhao*, Li Qiu, “Feedback stability under mixed gain and phase uncertainty,” IEEE Transactions on Automatic Control (Regular paper), 2024, 1-16.
  6. Sei Zhen Khong, Di Zhao*, Alexander Lanzon, “Converse negative imaginary theorems,” Automatica, 2024, 165: 111682.
  7. Di Zhao, Chao Chen*, Jianqi Chen, “Small gain and small angle conditions for feedback stability analysis of linear stochastic systems,” IEEE Transactions on Automatic Control, 2023, 69(5): 3349-3356.
  8. Tianqiu Yu*, Di Zhao, Li Qiu, “Phases of sectorial operators,” Integral Equations and Operator Theory, 2023, vol. 95, no. 31.
  9. Di Zhao*, Sei Zhen Khong, Li Qiu, “System monotonicity and subspace tracking: A geometric perspective of the Frisch–Shapiro scheme,” IEEE Transactions on Automatic Control (Regular paper), 2022, 67(11): 5872-5884.
  10. Di Zhao, Chao Chen*, Sei Zhen Khong, “A frequency-domain approach to nonlinear negative imaginary systems analysis,” Automatica, 2022, 146: 110604.
  11. Di Zhao*, Axel Ringh, Li Qiu, Sei Zhen Khong, “Low phase-rank approximation,” Linear Algebra and its Applications, 2022, 639: 177-204.
  12. Di Zhao, Li Qiu*, “Retrospect and prospect on integration of gain and phase for feedback stability analysis,” Control Theory and Technology, 2022, 20(4): 555-558.
  13. Di Zhao, Yi Dong*, “Recent advances on micro-control for near-critical complex systems,” Control Theory and Technology, 2022, 20(2): 287-290.
  14. Di Zhao*, Sei Zhen Khong, Li Qiu, “Stabilization of cascaded two-port networked systems with simultaneous nonlinear uncertainties,” Automatica, 2021, 123: 109360.
  15. Tianqiu Yu*, Di Zhao, Li Qiu, “Networked robust stability for LTV systems with simultaneous uncertainties in plant, controller, and communication channels,” SIAM Journal on Control and Optimization, 2021, 59(1): 1-23.
  16. Di Zhao*, Li Qiu, Guoxiang Gu, “Stabilization of two-port networked systems with simultaneous uncertainties in plant, controller, and communication channels,” IEEE Transactions on Automatic Control (Regular paper), 2020, 65(3): 1160-1175.

会议论文

  1. Jiajin Liang, Di Zhao, Li Qiu, “Sectored-disk problems and robust stability under mixed gain and phase uncertainty,” 26th International Symposium on Mathematical Theory of Networks and Systems (MTNS), Cambridge, UK, 2024.

  2. Chao Chen, Wei Chen, Di Zhao, Jianqi Chen, Li Qiu, “A cyclic small phase theorem for MIMO LTI systems,” 22nd IFAC World Congress, Yokohama, Japan, 2023.

  3. Di Zhao, “Low phase-rank approximation and its application for asymmetry reduction of digraphs,” 42nd Chinese Control Conference (CCC), Tianjin, China, 2023.

  4. Di Zhao, Wei Chen, Li Qiu, “When small gain meets small phase,” 41st Chinese Control Conference (CCC), online, China, 2022.

  5. Chao Chen, Di Zhao, W. Chen, Li Qiu, “A nonlinear small-phase theorem,” 21st IFAC World Congress, Berlin, Germany, 2020.

  6. Di Zhao, Sei Zhen Khong, Li Qiu “Stabilization of two-port NCSs with simultaneous uncertainties,” 40th Chinese Control Conference (CCC), Shanghai, China, 2021.

  7. Di Zhao, Sei Zhen Khong, Li Qiu, “Stabilization of cascaded two-port networked systems against nonlinear perturbations,” IEEE 56th Annual Conference on Decision and Control (CDC), Melbourne, Australia, 2017, pp. 1042-1045, 2017.

  8. Di. Zhao, Li Qiu, “Stability of networked feedback system with frequency-wise bounded uncertainty quartets,” 11th Asian Control Conference (ASCC), Gold Coast, Australia, 2017, pp. 1980-1983, 2017.

  9. Di Zhao, Li Qiu, “Networked robust stabilization with simultaneous uncertainties in plant, controller and communication channels,” IEEE 55th Conference on Decision and Control (CDC), Las Vegas, NV, 2016, pp. 2376-2381, 2016.

  10. Di Zhao, Anders Rantzer, Li Qiu, “A convex approach to Frisch-Kalman problem,” IEEE 58th Annual Conference on Decision and Control (CDC), Nice, France, pp. 7154-7158, 2019.

  11. Chao Chen, Di Zhao, Li Qiu, “Control of an under-sensed and under-actuated linear inverted pendulum,” The SICE Annual Conference (SICE), Nara, Japan, 2018.

章节论文

  1. Di Zhao, Chao Chen, Sei Zhen Khong, Li Qiu*, “Robust control against uncertainty quartet: A polynomial approach,” In T. Basar (eds), Uncertainty in Complex Networked Systems. Systems & Control: Foundations & Applications. Birkhauser, Cham, pp. 149-178, 2018.

  2. Li Qiu*, Di Zhao, “Robust control in gap metric,” In: J. Baillieul and T. Samad (eds), Encyclopedia of Systems and Control, Springer, London, 2019.

筹备/审稿中的论文

  1. Chao Chen, Wei Chen, Di Zhao, Jianqi Chen, Li Qiu*, “A cyclic small phase theorem,” IEEE Transactions on Automatic Control, under review.

  2. Sei Zhen Khong, Di Zhao*, Alexander Lanzon, “Extended strictly negative imaginary systems and associated robust feedback stability,” Automatica, under review.

  3. Haoxiang Yang, Di Zhao*, Jun Shang, “Safety verification for linear time-varying systems under ellipsoidal constraints,” IEEE Transactions on Automatic Control, under review.

  4. Weihao Zhang, Chao Chen, Jianqi Chen, Di Zhao*, “Angular safety analysis of interconnected systems,” in preparation.

  5. Di Zhao, Chao Chen, Jianqi Chen*, “Feedback stability of linear time-varying stochastic systems:  A passivity approach,” in preparation.

科研项目

  1. 国家自然科学基金青年科学基金，基于相位秩优化的无人自主系统模型降阶方法研究，2022-01-01 至2024-12-31，30万元，主持。

  2. 国家重点研发计划子课题，高动态约束下快速最优决策，2022-12-01至2027-11-30，70万元，主持。

  3. 教育部中国高校产学研创新基金，火场等极端环境下的多自主体安全协同理论与方法，2023-09-01 至 2024-08-31 2万元，主持。

  4. 同济大学自主原创基础研究项目，基于相位控制的网络鲁棒安全性理论，2024-04-01至2026-03-31，12万元 ，主持。

  5. 国家自然科学基金面上项目，智能无人集群系统在线反馈的安全决策控制一体化设计与分析，2024-01-01 至2027-12-31，50万元，参与。

  6. 国家自然科学基金面上项目，基于联邦学习机制的半导体智能制造系统异构分布式调度优化，2022-01-01 至2025-12-31，57万元 ，参与。

  7. 深港澳科技计划 （C类），复杂系统相位理论应用于多动子物料传输系统的协同控制，2021-07-30 至 2023-07-30，100万元，参与。