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Department of Electrical and Computer Engineering
Office: BSE 1.514,
Phone # (210)-458-5568
Univ. of Texas at San Antonio
1 UTSA Circle, TX 78249
ahmad.taha@utsa.edu

Welcome to my homepage! I’m an assistant professor with the Department of Electrical and Computer Engineering at the University of Texas at San Antonio. I am interested in understanding how complex dynamic system infrastructure operate, behave, and sometimes misbehave. Specifically,  I am interested in control and optimization of cyber-physical systems and the next generation of smart power grids, water networks, and (more recently) transportation systems. Please browse through the page. If something grabs your attention, please shoot me an email—I love discussing research ideas. I also like coffee, so we can always have coffee and talk research—a win-win scenario.

Updates, News:

  • [September 10] Pre-prints for papers on control/estimation of water networks:
  • [September 8] American Control Conference 2020 crunch time!
    • We are working on exciting research problems in water quality control, nonlinear dynamic systems theory, state estimation in water, energy, and transportation systems. 
  • [September 5] CSS E-Letter, Issue 373 is now online.
  • [September 1] Alfredo Avila joins my our group research. Welcome on board, Alfredo! So excited to be working with you. 
  • [August 25] Teaching Linear Systems Theory and Control this semester. 
  • [July 20] Our three submitted papers to the 2019 CDC in Nice, France have all been accepted! Will post pre-prints soon 🙂 (see above). 
  • [July 12] Our paper on Robust Control for Renewable-Integrated Power Networks (available here) is accepted for publication in the IEEE Trans. on Control of Network Systems, Special Issue on Analysis, Control and Optimization of Energy System Networks.  
  • [July 10] My students and I are attending the 2019 ACC in Philly and are presenting our work on optimization, state estimation, and control of energy, water, and traffic networks:
    • Control of water networks. View preprint here.  
    • Characterizing nonlinearities in power grid models. View preprint here.  
    • State estimation in traffic networks. View preprint here.  
  • [July 1] CSS E-Letter, Issue 371 is now online.
  • [June 10] Our paper on mitigating GPS spoofing attacks on stationary receivers has been accepted for publication in the IEEE Control System Letters. Congrats to Junhwan Lee on his very first paper! View the paper here
  • [June 1] CSS E-Letter, Issue 370 is now online. Click here to view the E-Letter. 
  • [May 28] Visiting my hometown Beirut for couple of weeks!  
  • [May 10] Our paper on a peer-to-peer energy trading and grid management through blockchain is accepted for publication in the IEEE Transactions on Systems, Man, Cybernetics: Systems. View the paper here. Congrats to Shen Wang on his very journal publication. 
  • [May 1] CSS E-Letter, Issue 369 is now online. Click here to view the E-Letter. 
  • [April 16-18] Attending the 2019 CPS Week and the International Conference on Cyber-Physical Systems (ICCPS) in Montreal.
  • [April 1] CSS E-Letter, Issue 368 is now online. Click here to view the E-Letter. 
  • [March 15] Our paper on the joint selection of sensors and actuators in linear networks has been accepted for publication in Automatica. Pre-print available here
  • [March 1] CSS E-Letter, Issue 367 is now online. Click here to view the E-Letter. 
  • [February 1] CSS E-Letter Issue 366 is now online. Click here if you want :-). 
  • [January 1] I am now the editor of IEEE Control Systems Society E-Letter. Here’s a link for Issue 365 of the CSS E-Letter. 

Bio & Interests

Short Biography

I was born in 1989 in the Lebanese capital, Beirut (Arabic: بيروت‎ Bayrūt), the midpoint of Lebanon’s gorgeous Mediterranean coast. Here’s my quick career highlights:

  • September 27, 2007: Started undergraduate education at the American University of Beirut (AUB). I majored in Electrical and Computer Engineering.
  • Summer 2010: Interned at  Laboratory of Information and Decision Systems (LIDS),  MIT. I worked on a  traffic testbed that would simulate people’s behavior when a large disruption hits a transportation network.
  • June 25, 2011: Graduated with a B.E. in ECE from AUB with two minors—one in Mathematics and another in Engineering Management.
  • Summer 2011: Started drinking coffee.
  • August 2011—August 2015: At Purdue, I was a teaching and research assistant with the Schools of ECE and Mechanical Engineering. I worked mainly on the security, optimization and control of uncertain cyber-physical systems, and applications in energy systems.
  • Summer 2014: Went for a summer internship at the University of Toronto and worked on the problem of dynamic integration of steady and transient state operations in power networks.
  • Spring 2015: Interned at Argonne National Lab as a visiting researcher with the Center for Energy, Environmental, & Economic Systems Analysis.  I worked with on cyber-security and control-related topics in smart-grids.
  • August 2015: Joined the ECE department at the University of Texas at San Antonio as an assistant professor.
  • August 2016: Started investigating problems in water and traffic systems; continued my research on energy systems.
  • Now: Still drinking coffee.

General Interests

My long term career goal is: (a) understanding how complex, nonlinear dynamic networks—present in infrastructure—behave and misbehave, (b) proposing algorithms to manage these systems, and (c) streamlining this research by making it accessible to a wide audience through contemporary tools and approaches. Specifically, I am interested in solving complex engineering problems and developing tools, protocols, and control algorithms that would ultimately empower policy makers and system operators to make better decisions about their systems, while enabling more resilient and tolerant systems against disturbances and unwanted attacks. I have applied the techniques I developed to drinking water systems, sustainable energy networks, more recently to transportation networks. 

Specific Research Interests

I am specifically interested in the following interrelated research areas:

  • Uncertain Cyber-Physical Systems (CPS) and Nonlinear Dynamic Networks
  • Sensor and Control Node Selection/Placement Problems in Nonlinear Systems
  • Sustainable Energy and Water Systems Operations, Stability, and Control
  • Estimation and Control in Traffic Networks with Connected Vehicles
  • Contamination Mitigation and Water Quality Control in Drink Water Networks
  • Cyber-Security of CPS, Smart Grids, Water Distribution Networks

Some of the above interests are fairly recent, some date to couple years ago, and some date back to my early PhD studies. The word ‘interest’ has an expiry date, too. 🙂

Publications

Click here to visit my Google Scholar page.  The below list is not thoroughly updated.

55 entries « 1 of 2 »

2020

Taha, Ahmad F; Bazrafshan, Mohammadhafez; Nugroho, Sebastian; Gatsis, Nikolaos; Qi, Junjian

Robust Control for Renewable-Integrated Power Networks Considering Input Bound Constraints and Worst-Case Uncertainty Measure Journal Article

IEEE Transactions on Control of Network Systems, 1 (1), 2020, (textbfIn Press).

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Lee, J; Taha, A F; Gatsis, N; Akopian, D

Tuning-Free, Low Memory Robust Estimator to Mitigate GPS Spoofing Attacks Journal Article

IEEE Control Systems Letters, 4 (1), pp. 145-150, 2020.

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2019

Wang, Shen; Taha, Ahmad F; Gatsis, Nikolaos; Giacomoni, Marcio H; Sela, Lina

State Estimation in Water Distribution Networks through a New Successive Linear Approximation Inproceedings

IEEE 58th Conference on Decision and Control (CDC), Nice, France, 2019.

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Nugroho, Sebastian; Taha, Ahmad F

Sensor Placement Strategies for Some Classes of Nonlinear Dynamic Systems Via Lyapunov Theory Inproceedings

IEEE 58th Conference on Decision and Control (CDC), Nice, France, 2019.

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Wang, Shen; Taha, Ahmad F; Sela, Lina; Giacomoni, Marcio; Gatsis, Nikolaos

GP-Net: A New Geometric Programming-Based Approximation for Solving the Network Water Flow Problem Journal Article

Water Resources Research, 2019, (In review, second round).

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Wang, Shen; Taha, Ahmad F; Sela, Lina; Gatsis, Nikolaos; Giacomoni, Marcio

Probabilistic State Estimation in Water Distribution Networks Considering Demand and Pipe Roughness Uncertainty Journal Article

Automatica, 2019, (In review, first round).

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Nugroho, Sebastian A; Taha, Ahmad F; Hoang, Vu

A Unified Framework for Nonlinear Dynamic Systems Parameterization Using Interval-Based Global Optimization Journal Article

IEEE Transactions on Automatic Control, 2019, (In review, first round).

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Nugroho, Sebastian A; Taha, Ahmad F; Qi, Junjian

Robust Dynamic State Estimation of Synchronous Machines with Asymptotic State Estimation Error Performance Guarantees Journal Article

IEEE Transactions on Power Systems, 2019, (In review, third round).

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Wang, Shen; Taha, Ahmad F; Sela, Lina; Gatsis, Nikolaos; Giacomoni, Marcio

Geometric Programming-Based Model Predictive Control for Water Distribution Network Operations Journal Article

IEEE Transactions on Control of Network Systems, 2019, (In review, second round).

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Nugroho, Sebastian A; Taha, Ahmad F; Qi, Junjian

Characterizing the Nonlinearity of Power System Generator Models Inproceedings

2019 American Control Conference, Philadelphia, US, 2019.

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Wang, Shen; Taha, Ahmad F; Gatsis, Nikolaos; Giacomoni, Marcio

Geometric Programming-Based Control for Nonlinear, DAE-Constrained Water Distribution Networks Inproceedings

2019 American Control Conference, Philadelphia, US, 2019.

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Nugroho, Sebastian A; Taha, Ahmad F; Claudel, Christian

A Control-Theoretic Approach for Scalable and Robust Traffic Density Estimation using Convex Optimization Journal Article

IEEE Transactions on Intelligent Transportation Systems, 2019, (In review, third round).

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Wang, Shen; Taha, Ahmad F; Gatsis, Nikolaos; Giacomoni, Marcio H

Geometric Programming Approach for Optimal Control of Water Distribution Networks Inproceedings

2019 World Environmental & Water Resources Congress, Pittsburgh, 2019.

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Taha, Ahmad F; Gatsis, Nikolaos; Dong, Bing; Pipri, Ankur; Li, Zhaoxuan

Buildings-to-Grid Integration Framework Journal Article

IEEE Transactions on Smart Grid, 10 (2), pp. 1237-1249, 2019.

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Bazrafshan, Mohammadhafez; Gatsis, Nikolaos; Taha, Ahmad Fayez; Taylor, Joshua A

Coupling Load-Following Control with OPF Journal Article

IEEE Transactions on Smart Grid, 10 (3), pp. 2495–2506, 2019.

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Taha, Ahmad F; Gatsis, Nikolaos; Summers, Tyler; Nugroho, Sebastian

Time-Varying Sensor and Actuator Selection for Uncertain Cyber-Physical Systems Journal Article

IEEE Transactions on Control of Network Systems, 6 (2), pp. 750–762, 2019.

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Rishud, Paresh; Gatsis, Nikolaos; Taha, Ahmad Fayez

Vulnerability Analysis of Smart Grids to GPS Spoofing Journal Article

IEEE Transactions on Smart Grid, 10 (4), pp. 3535–3548, 2019.

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Wang, Shen; Taha, Ahmad F; Wang, Jianhui; Kvaternik, Karla; Hahn, Adam

Energy Crowdsourcing and Peer-to-Peer Energy Trading in Blockchain-Enabled Smart Grids Journal Article

IEEE Transactions on Systems, Man, and Cybernetics: Systems, 49 (8), pp. 1612–1623, 2019.

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Nugroho, Sebastian A; Taha, Ahmad F; Gatsis, Nikolaos; Summers, Tyler H; Krishnan, Ram

Algorithms for joint sensor and control nodes selection in dynamic networks Journal Article

Automatica, 106 , pp. 124–133, 2019.

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Nugroho, Sebastian A; Taha, Ahmad F

On the need for sensor and actuator placement algorithms in nonlinear systems: WIP abstract Inproceedings

Proceedings of the 10th ACM/IEEE International Conference on Cyber-Physical Systems, pp. 304–305, ACM 2019.

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Wang, Shen; Taha, Ahmad F; Gatsis, Nikolaos; Giacomoni, Marcio H

Control of water distribution networks using convex approximations: WIP abstract Inproceedings

Proceedings of the 10th ACM/IEEE International Conference on Cyber-Physical Systems, pp. 301–301, ACM 2019.

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2018

Wang, S; Taha, A F; Wang, J

Blockchain-Assisted Crowdsourced Energy Systems Inproceedings

2018 IEEE Power Energy Society General Meeting (PESGM), pp. 1-5, 2018.

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Nugroho, S; Taha, A F; Summers, T; Gatsis, N

Simultaneous Sensor and Actuator Selection/Placement through Output Feedback Control Inproceedings

2018 Annual American Control Conference (ACC), pp. 4159-4164, 2018.

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Dong, B; Taha, A F; Gatsis, N; Li, Z; Pipri, A

Impact of Occupancy-Based Buildings-to-Grid Integration on Frequency Regulation in Smart Grids Inproceedings

2018 Annual American Control Conference (ACC), pp. 5399-5405, 2018, ISSN: 2378-5861.

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Ebrahimi, N; Nugroho, S; Taha, A F; Gatsis, N; Gao, W; Jafari, A

Dynamic Actuator Selection and Robust State-Feedback Control of Networked Soft Actuators Inproceedings

2018 IEEE International Conference on Robotics and Automation (ICRA), pp. 2857-2864, 2018.

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Bhounsule, Pranav A; Taha, Ahmad; Nugruho, Sebastian

Control Systems and Robotics Outreach to Middle-school Girls: Approach, Results, and Suggestions Inproceedings

ASEE Gulf-Southwest Section Annual Conference, 2018, (textbfBest paper award, second place).

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Taha, Ahmad F; Qi, Junjian; Wang, Jianhui; Panchal, Jitesh H

Risk Mitigation for Dynamic State Estimation Against Cyber Attacks and Unknown Inputs Journal Article

IEEE Transactions on Smart Grid, 9 (2), pp. 886–899, 2018.

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Qi, Junjian; Taha, Ahmad F; Wang, Jianhui

Comparing Kalman Filters and Observers for Power System Dynamic State Estimation with Model Uncertainty and Malicious Cyber Attacks Journal Article

IEEE Access, 6 , pp. 77155–77168, 2018.

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Khalajmehrabadi, Ali; Gatsis, Nikolaos; Akopian, David; Taha, Ahmad Fayez

Real-Time Rejection and Mitigation of Time Synchronization Attacks on the Global Positioning System Journal Article

IEEE Transactions on Industrial Electronics, 65 (8), pp. 6425–6435, 2018.

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Dong, Bing; Li, Zhaoxuan; Taha, Ahmad; Gatsis, Nikolaos

Occupancy-based buildings-to-grid integration framework for smart and connected communities Journal Article

Applied Energy, 219 , pp. 123–137, 2018.

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Taormina, Riccardo; Galelli, Stefano; Tippenhauer, Nils Ole; Salomons, Elad; Ostfeld, Avi; Eliades, Demetrios G; Aghashahi, Mohsen; Sundararajan, Raanju; Pourahmadi, Mohsen; Banks, Katherine M; others,

Battle of the attack detection algorithms: Disclosing cyber attacks on water distribution networks Journal Article

Journal of Water Resources Planning and Management, 144 (8), pp. 04018048, 2018.

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Bazrafshan, Mohammadhafez; Gatsis, Nikolaos; Giacomoni, Marcio; Taha, Ahmad

A fixed-point iteration for steady-state analysis of water distribution networks Inproceedings

2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP), pp. 880–884, IEEE 2018.

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Nugroho, Sebastian; Bazrfashan, Mohammadhafez; Taha, Ahmad F; Gatsis, Nikolaos; Qi, Junjian

Robust Control of Power Networks under Worst-Case Load and Renewables Uncertainty Inproceedings

2018 Annual American Control Conference (ACC), pp. 6156–6161, IEEE 2018.

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Ayyagari, Krishna Sandeep; Gatsis, Nikolaos; Taha, Ahmad F; Dong, Bing

On Static and Adaptive Policies for Chance-Constrained Voltage Regulation Inproceedings

2018 52nd Asilomar Conference on Signals, Systems, and Computers, pp. 1858–1862, IEEE 2018.

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2017

Taha, A F; Gatsis, N; Summers, T; Nugroho, S

Actuator selection for cyber-physical systems Inproceedings

2017 American Control Conference (ACC), pp. 5300-5305, 2017.

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Giacomoni, Marcio; Gatsis, Nikolaos; Taha, Ahmad

Identification of Cyber Attacks on Water Distribution Systems by Unveiling Low-Dimensionality in the Sensory Data Inproceedings

World Environmental and Water Resources Congress 2017, pp. 660–675, 2017.

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Ayyagari, Krishna; Gatsis, Nikolaos; Taha, Ahmad

Chance Constrained Optimization of Distributed Energy Resources via Affine Policies Inproceedings

5th IEEE Global Conference on Signal and Information Processing, 2017.

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Li, Zhaoxuan; Pipri, Ankur; Dong, Bing; Gatsis, Nikolaos; Taha, Ahmad; Yu, Nanpeng

Modelling, Simulation and Control of Smart and Connected Communities Inproceedings

Building Simulation, 2017.

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2016

Risbud, Paresh; Gatsis, Nikolaos; Taha, Ahmad

Assessing power system state estimation accuracy with GPS-spoofed PMU measurements Inproceedings

2016 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), pp. 1–5, IEEE 2016.

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Bazrafshan, Mohammadhafez; Gatsis, Nikolaos; Taha, Ahmad F; Taylor, Josh A

Augmenting the optimal power flow for stability Inproceedings

2016 IEEE 55th Conference on Decision and Control (CDC), pp. 4104–4109, IEEE 2016.

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Zamani, Ali; Bhounsule, Pranav A; Taha, Ahmad

Planning energy-efficient bipedal locomotion on patterned terrain Inproceedings

SPIE Defense Security, pp. 98370A–98370A, International Society for Optics and Photonics 2016.

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2015

Elmahdi, Ahmed; Taha, Ahmad F; Sun, Dengfeng; Panchal, Jitesh H

Decentralized control framework and stability analysis for networked control systems Journal Article

Journal of Dynamic Systems, Measurement, and Control, 137 (5), pp. 051006, 2015.

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Taha, Ahmad F; Elmahdi, Ahmed; Panchal, Jitesh H; Sun, Dengfeng

Unknown input observer design and analysis for networked control systems Journal Article

International Journal of Control, 88 (5), pp. 920–934, 2015.

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Taha, Ahmad F

Secure estimation, control and optimization of uncertain cyber-physical systems with applications to power networks PhD Thesis

Purdue University, Department of Electrical and Computer Engineering, 2015.

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2014

Taha, Ahmad F; Hachem, Nadim A; Panchal, Jitesh H

A Quasi-Feed-In-Tariff policy formulation in micro-grids: A bi-level multi-period approach Journal Article

Energy Policy, 71 , pp. 63–75, 2014.

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Elmahdi, Ahmed; Taha, Ahmad F; Sun, Dengfeng

Observer-based decentralized control scheme for stability analysis of networked systems Inproceedings

11th IEEE International Conference on Control & Automation (ICCA), pp. 857–862, IEEE 2014.

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Taha, Ahmad F; Elmahdi, Ahmed; Panchal, Jitesh H; Sun, Dengfeng

Networked unknown input observer analysis and design for time-delay systems Inproceedings

2014 IEEE International Conference on Systems, Man, and Cybernetics (SMC), pp. 3278–3283, IEEE 2014.

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Taha, Ahmad F; Elmahdi, Ahmed; Panchal, Jitesh H; Sun, Dengfeng

Pure Time Delay Analysis for Decentralized Networked Control Systems Inproceedings

ASME 2014 Dynamic Systems and Control Conference, pp. V003T47A001–V003T47A001, American Society of Mechanical Engineers 2014.

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Elmahdi, Ahmed; Taha, Ahmad F; Sun, Dengfeng; Panchal, Jitesh H

An optimal general purpose scheduler for networked control systems Inproceedings

2014 IEEE International Conference on Systems, Man, and Cybernetics (SMC), pp. 234–239, IEEE 2014.

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Taha, Ahmad F; Elmahdi, Ahmed; Panchal, Jitesh H; Sun, Dengfeng

Stability analysis of networked control systems with unknown inputs Inproceedings

2014 52nd Annual Allerton Conference on Communication, Control, and Computing (Allerton), pp. 936–942, IEEE 2014.

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55 entries « 1 of 2 »