Publications

Journals (published/accepted)

• Imrul Qais, Chayan Bhawal, and Debasattam Pal, Singular LQR optimal control of DAEs: A feedback solution, Automatica, vol. 173, 2025. [Link]
• Imrul Qais, Chayan Bhawal, and Debasattam Pal, Optimal singular LQR problem: A PD feedback solution, SIAM Journal on Control and Optimization (SICON), vol. 61, no. 4, pages 2655 - 2681, 2023. [Link]
• Ashish Kothyari, Chayan Bhawal, Madhu N Belur, and Debasattam Pal, Imaginary axis eigenvalues of Hamiltonian matrix: controllability, defectiveness and the epsilon-characteristic, International Journal of Control, vol. 96, no. 12, pages 2958 - 2975, 2022. [Link]
• Chayan Bhawal, Debasattam Pal, and Madhu N Belur, Closed form solutions of singular KYP lemma: strongly passive systems, and fast lossless trajectories, International Journal of Control, vol. 93, no. 5, pages 1204 - 1217, 2020 (Published online Jul 2018). [Link]
• Chayan Bhawal and Debasattam Pal, Almost every single-input LQR optimal control problem admits a PD feedback solution, IEEE Control Systems Letters, vol. 3, no. 2, pages 452 - 457, 2019. [Link]
• Chayan Bhawal, Imrul Qais, and Debasattam Pal, Constrained generalized continuous algebraic Riccati equations (CGCAREs) are generically unsolvable, IEEE Control Systems Letters, vol. 3, no. 1, 2019. [Link]
• Chayan Bhawal, Debasattam Pal, Sandeep Kumar, and Madhu N Belur, New results and techniques for computation of stored energy in lossless/all-pass systems, IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 64, no. 1, pages 72-85, 2017. [Link]

Conferences

• Paraj Ganchaudhuri and Chayan Bhawal, Least energy trajectory generation for quadrotors using rotor acceleration as control inputs, International Conference on Control, Decision and Information Technologies (CoDIT), Split, Croatia, July 15 - July 18, 2025.
• Paraj Ganchaudhuri and Chayan Bhawal, Maneuver based dynamic power consumption model of a hover-linearized quadcopter, IEEE Guwahati Subsection Conference (GCON), NERIST, Arunachal Pradesh, June 18 - June 20, 2025.
• Gangadari Varaprasad, Chayan Bhawal and Indrani Kar, A distributed algorithm for assigning UAVs to multiple heterogeneous positions of interest, Indian Control Conference (ICC), IISER Bhopal, December 09 - December 11, 2024.
• Biswanath Paul, Parijat Bhowmick, and Chayan Bhawal, A dynamic consensus control scheme for heterogeneous DC/DC buck converter systems utilizing ‘mixed’ negative imaginary technique, IEEE Conference on Decision and Control (CDC), Milan, Italy, December 16 - December 19, 2024.
• Paraj Ganchaudhuri and Chayan Bhawal, Power consumption of a quadrotor based on maneuvers, IEEE Guwahati Subsection Conference (GCON), Guwahati, India, June 23 - June 25, 2023.
• Chayan Bhawal, Debasattam Pal, and Madhu N Belur, Lossless trajectories of singularly passive systems, Mathematical Theory of Networks and Systems (MTNS), Bayreuth, Germany, September 12 - September 16, 2022.
• Imrul Qais, Chayan Bhawal, and Debasattam Pal, A Hamiltonian system based approach for the computation of the maximal rank-minimizing solution of the LMI arising from a singular LQR problem, European Control Conference (ECC), London, UK, July 12 - July 15, 2022. [Link]
• Imrul Qais, Debasattam Pal, and Chayan Bhawal, A geometric characterization of the slow space of the Hamiltonian system arising from the singular LQR problem, IFAC World Congress, July 12 - July 17, 2020. [Link]
• Chayan Bhawal, Jan Heiland, and Peter Benner, PD controllers to solve single-input, index-1 DAE based LQR problems, European Control Conference (ECC), Saint Petersburg, Russia, May 12 ‑ May 15, 2020. [Link]
• Chayan Bhawal, Debasattam Pal, and Madhu N. Belur, On circulant Lyapunov operators, two-variable polynomials, and DFT, Indian Control Conference (ICC), Hyderabad, December 18 - December 20, 2019. [Link]
• Chayan Bhawal and Debasattam Pal, On solvability of CGCARE for LQR problems with zero input-cost, IEEE Conference on Decision and Control (CDC), Nice, France, December 11 - December 13, 2019. [Link]
• Ashish Kothyari, Chayan Bhawal, Madhu N Belur, and Debasattam Pal, Defective Hamiltonian matrix imaginary eigenvalues and losslessness, Indian Control Conference (ICC), Delhi, January 9 - January 11, 2019. [Link]
• Chayan Bhawal, Debasattam Pal, and Madhu N Belur, On solutions of bounded-real LMI for singularly bounded-real systems, European Control Conference, Limassol, Cyprus, June 12 - June 15, 2018. [Link]
• Chayan Bhawal, Debasattam Pal, and Madhu N Belur, On the link between storage functions of allpass systems and Gramians, IEEE Conference on Decision and Control (CDC), Melbourne, Australia, December 12 - December 15, 2017. [Link]
• Chayan Bhawal, Debasattam Pal, and Madhu N Belur, A 2D-DFT based method to compute the Bezoutian and a link to Lyapunov equations, Indian Control Conference (ICC), Guwahati, India, January 4 - January 6, 2017. [Link]
• Sandeep Kumar, Chayan Bhawal, Debasattam Pal, and Madhu N Belur, New results and algorithms for computing storage functions: The lossless/allpass cases, European Control Conference (ECC), Aalborg, Denmark, June 29 - July 1, 2016. [Link]

Book Chapter

• Chayan Bhawal, Sandeep Kumar, Debasattam Pal, and Madhu N. Belur, New properties of ARE solutions for strictly dissipative and lossless systems, Mathematical Control Theory II: Behavioral Systems and Robust Control, Springer International Publishing, 2015. [Link]

PhD Thesis

• Chayan Bhawal, Generalized Riccati theory: A Hamiltonian system approach, Department of Electrical Engineering, Indian Institute of Technology Bombay, 2019 [E-mail me for the thesis]