### Journal Papers

- K. Sato, A. Takeda: Controllability maximization of large-scale systems using projected gradient method,

IEEE Control Systems Letters, Vol. 4, No. 4, pp. 821-826, 2020. (**Open Access**) - K. Sato, H. Sato, and T. Damm:

Riemannian optimal identification method for linear systems with symmetric positive-definite matrix,

IEEE Transactions on Automatic Control (accepted). (arXiv) - K. Sato, A. Takeda:

Construction methods of the nearest positive system,

IEEE Control Systems Letters, Vol. 4, No. 1, pp. 97-102, 2020. (**Open Access**) - K. Sato: Optimal graph Laplacian,

Automatica, Vol. 103, pp. 374-378, 2019. (**Open Access**) - K. Sato: Riemannian optimal model reduction of stable linear systems,

IEEE Access, Vol. 7, pp. 14689-14698, 2019. (**Open Access**) - K. Sato, S. Azuma:

Secure real-time control through Fog computation,

IEEE Transactions on Industrial Informatics, Vol. 15, No. 2, pp. 1017-1026, 2019. (**Open Access**) - K. Sato:

Riemannian optimal model reduction of linear port-Hamiltonian systems,

Automatica, Vol. 98, pp. 428–434, 2018. - K. Sato:

Optimal Input Elimination,

SICE Journal of Control, Measurement, and System Integration, Vol. 11, No. 2, pp. 100-104, 2018. - K. Sato, H. Sato:

Structure preserving H^2 optimal model reduction based on Riemannian trust-region method,

IEEE Transactions on Automatic Control, Vol. 63, No. 2, pp. 505-511, 2018. - K. Sato:

Riemannian optimal control and model matching of linear port-Hamiltonian systems,

IEEE Transactions on Automatic Control, Vol. 62, No. 12, pp. 6575-6581, 2017. (**Open Access**) - T. Damm, K. Sato, A. Vierling:

Numerical solution of Lyapunov equations related to Markov jump linear systems,

Numerical Linear Algebra with Applications, pp. 1-14, 2017. - H. Sato, K. Sato:

Riemannian optimal system identification algorithm for linear MIMO systems,

IEEE Control Systems Letters, Vol. 1, No. 2, pp. 376-381, 2017. - K. Sato:

Riemannian optimal model reduction of linear second-order systems,

IEEE Control Systems Letters, Vol. 1, Iss. 1, pp. 2-7, 2017. - K. Sato, S. Azuma:

Controllability Analysis of Aggregate Demand Response System in Multiple Price-Change Situation,

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences,

Vol.E100-A, No. 2, pp.376-384, 2017. - K. Sato:

Polynomial matrix approach to tracking control of nonlinear systems,

IET Control Theory & Applications,

Vol. 10, Iss. 4, pp. 477-483, 2016. - K. Sato, S. Azuma:

Controllability Analysis of An Aggregate Demend Response System,

Mathematical Problems in Engineering,

Vol. 2015, Article ID 487173, pp. 1-11, 2015. - K. Sato:

Algebraic Controllability and Observability of Nonlinear Differential Algebraic Systems with Geometric Index One,

SICE Journal of Control, Measurement, and System Integration,

Vol. 7, No. 5, pp. 283-290, 2014. - K. Sato:

Algebraic Controllability of Nonlinear Mechanical Control Systems,

SICE Journal of Control, Measurement, and System Integration,

Vol. 7, No. 4, pp. 191-198, 2014. - K. Sato, T. Iwai:

Configuration flatness of Lagrangian control systems with fewer controls than degrees of freedom, Systems & Control Letters,

Vol. 61, No. 2, pp. 334-342, 2012.

### Preprint

### International Conferences

- K. Sato, S. Azuma：

Privacy input design for concealing output of linear SISO systems,

56th IEEE Conference on Decision and Control, Melbourne, Australia, December 12-15, 2017 (accepted) - K. Sato, S. Azuma：

Design of consumer groups including uncontrollable consumers,

SICE Annual Conference, September 19-22, 2017. - K. Sato, S. Azuma：

All Stabilizing and Concealing Gaussian Type Controllers for Linear Scalar Systems,

55th IEEE Conference on Decision and Control, Las Vegas, USA, December 12-14, pp. 2861-2866, 2016. - H. Sato, K. Sato:

A New H^2 Optimal Model Reduction Method Based on Riemannian Conjugate Gradient Method,

55th IEEE Conference on Decision and Control, Las Vegas, USA, December 12-14, pp. 5762-5768, 2016. - K. Sato, S. Azuma：

Controllability of Aggregate Demand Response Systems for Real-Time Pricing,

The 4th International Conference on Cyber-Physical Systems, Networks, and Applications, Aichi, Japan, October 6-7, pp. 33-34, 2016. - H. Sato, K. Sato:

Riemannian Trust-Region Methods for H^2 Optimal Model Reduction,

54th IEEE Conference on Decision and Control, Osaka, Japan, December 15-18, pp. 4648-4655, 2015. - K. Sato, S. Azuma：

A design method for confidential control systems,

The 34th Chiniese Control Conference and SICE Annual Conference 2015, July 28-30, pp. 512-512, 2015. - K. Sato, S. Azuma：

A controller design method for unidentifiable linear SISO systems,

The 10th Asian Control Conference 2015, Kota Kinabaru, Malaysia, May 31- June 3, pp. 54-59, 2015. - K. Sato, S. Azuma：

Numerical Studies of Aggregate Demand Response by Real-time Pricing,

The 34th IASTED International Conference on Modelling, Identification and Control (MIC2015), Innsbruck, Austria, February 16-17, pp. 131-138, 2015. - K. Sato :

Flatness-based tracking control of nonlinear differential algebraic systems with geometric index one,

52nd IEEE Conference on Decision and Control, Italy, pp. 7443-7448, 2013. - K. Sato :

Algebraic observability of nonlinear differential algebraic systems,

52nd IEEE Conference on Decision and Control, Italy, pp. 2582-2587, 2013. - K. Sato :

Differential flatness of affine nonlinear control systems,

SICE Annual Conference 2012, Akita, Japan, August 20-23, pp. 892-897, 2012. - K. Sato :

On an algorithm for checking whether or not a nonlinear discrete time system is difference flat,

20th International Symposium on Mathematical Theory of Networks and Systems, Melbourne, Australia, July 9-13, pp. 1-8, 2012.