TC 2.2. Linear Control Systems

Welcome Message from the Chair

Welcome to the official webpage of the Technical Committee 2.2. 

This Technical Committee focuses on the understanding phenomena and studying processes behaviors in which linearity plays a fundamental role.

It fosters the development of tools, methods and approaches for the analysis and synthesis of dynamical systems described by linear differential and/or difference equations in finite-dimensional and/or abstract spaces, including finite-dimensional time-invariant and time-variant systems, linear parameter-varying systems, infinite-dimensional systems, descriptor and singular systems, n-dimensional systems, time-delay systems, functional systems, positive systems, fractional systems, complex systems and variable structure systems. 

It promotes investigation of the structural properties of systems which are related to linearity and the use of a control theoretic point of view in the solution of modeling, monitoring, computing and control problems in complex systems emerging fields of systems, such as System of Systems, engineering and related applied fields.

The main activity sponsored by this TC is the IFAC Symposium on System Structure and Control (SSSC). The TC is also the main sponsor of the Workshops on Time Delay Systems (TDS), Workshops on Linear Parameter Varying Systems (LPVS), Workshops on Control of Complex Systems (COSY) and Conferences on Fractional Differentiation and Its Applications (FDA).

From 2013 for nearly ten years, the Symposium on System Structure and Control (SSSC) and the Workshop on Time Delay Systems (TDS) have been held  in the format of the “joint IFAC Conferences”. From 2022, based on the TC members suggestions, IFAC SSSC-TDS changed to IFAC SSSC-TDS-LPVS by including also the LPVS Workshops. In 2022, the COSY Workshop was launched and, in 2025, the joint IFAC Conference grouped together SSSC-TDS-COSY, while the LPVS Workshop was held jointly with ROCOND within a consolidated collaboration with TC 2.5. In 2024, on occasion of its 20th anniversary, ICFDA recovered its conference status and, since then, it is held regularly every one year and a half.

From 2021, TC 2.2 presents two career awards:

  • The IFAC System Structure and Control Lifetime Achievement Award (SSC)
  • The IFAC Delay Systems Lifetime Achievement Award (TDS)

The 2021 TDS Awardees, announced at the 16th IFAC Workshop on Time-Delay Systems (TDS, Guangzhou, China, September 2021), were Emilia Fridman, Vladimir Kharitonov, and Gabor Stepan.

The 2022 SSC Awardees, announced at the Joint IFAC SSSC/TDS/LPVS conference (Montreal, Canada, September 2022) were Michel Fliess and Vladimir Kucera.

The 2025 SSC Awardees and the 2025 TDS Awardees were announced together at the Joint IFAC SSSC-TDS-COSY conference (Gif-sur-Yvette, France, July 2025). The recipient of the 2025 SSC Lifetime Achievement Award was Anna Maria Perdon. The recipients of the 2025 TDS Lifetime Achievement Award were Keqin Gu, Miroslav Krstic and Vladimir Rasvan. 

As to 2026, the TC activities are focused on the IFAC World Congress. Nevertheless, new exciting events are being planned for  the following years.

Elena ZATTONI (TC 2.2 Chair, 2023-2026)

Former TC Chairs:

  • 2017-2023: Silviu-Iulian NICULESCU (FR)
  • 2011-2017: Giuseppe CONTE (IT)
  • 2005-2011: Luc DUGARD (FR)
  • 2002-2005: Carlos E DE SOUZA (BR)
  • 1996-2002: Jean-Michel DION (FR)