In this paper, we propose an advanced ILQ control for the buck-converter via two-degrees of freedom servo-system. Our presented strategy is based on Inverse Linear Quadratic (ILQ) servo-system controller without solving Riccati-s equation directly. The optimal controller of the current and voltage control system is designed. The stability and robust control are analyzed. A conscious and persistent effort has been made to improve ILQ control via two-degrees of freedom guarantees the optimal gains on the basis of polynomial pole assignment, which our results of the proposed strategy shows that the advanced ILQ control can be controlled independently the step response and the disturbance response by appending a feed-forward compensator.
F. Hsieh, N. Yen, and Y. Juang, "Optimal controller of a buck DC-DC converter using the uncertain load as stochastic noise," IEEE Transactions onCircuits and Systems II: Express Brief vol. 5, pp. 77- 81, Feb. 2005.
H. Kimura, T. Fujii, and T. Mori, Robust Control. Tokyo: Corona Publishing Co., Ltd, 1994, pp. 109-156.
H. Takami, "Robust Current Control for Permanent Magnet Synchrous Motors by the Inverse LQ Methed -An Evaluation of Control Performance Using Servo-Locks at Low Speed-," Journal of power Electronics, vol. 4, no.4, pp. 228-236, Oct. 2004.
H. Yigeng, M. Ruiqing, X. En, and A. Miraoui, "A robust second order
Electrical Machines and Systems (ICEMS), Incheon, 2010, pp. 159-161. sliding mode controller for Buck converter," International Conference
M. Bensaada, A. Stambouli, M. Bekhti, S. Krachai, L. Boukhris, A. Bellar, M. Mebrek, and B. Nasri, "Sliding mode controller for buck DC-DC Converter. Systems, Signals and Devices (SSD)," in Proc.9th International Multi-Conference, Chemnitz, 2012, pp. 1-6.
S. Aumted, S. Kanda, H. Takami, and S. Tatsuno, "Optimal Voltage Control for Single-Phase Inverter with Resonant LC Filter by Type-2 ILQ Servo-Control by 2nd-Order Polynomial," in Applied Mechanics and Materials Journal:Trans Tech Publications, Switzerland, 2013, vol. 622-623, pp. 1514-1518 (ICMCE 2012 Conf. Shanghai, Aug. 2012).
T. Fujii, "A New Approch to the LQ Design from the Viewpoint of the Inverse Regulator Probrem," IEEE Trans. Automatic Control, vol. AC-32, no. 11, pp. 995-1004, Nov 1987.
T. Fujii, S. Kunimatsu, and 0. kaneko, "Synthesis of ILQ Control System for Disturbance Attenuation," in Proc. SICE Annual Conference, Japan, 2008, pp. 1300-1303.
 T. Fujii, and T. Shimomura, "Generalization of ILQ Method for the Design of Optimal Servo Systems," Trans. of the Institute of Systems, Control and Information Eng. vol. 1, no. 6, pp.194-203, 1988.
 T. Shimomura, T. Fujii, and N. suda, "Generalization of the ILQ Regulator Design Method," in Proc. American Control Conference, Seattle, 1995, pp. 1967-1968.
 T. Fujii, "Design of Tracking Systems with LQ Optimality and Quadratic Stability," in Proc. IFAC World Congress, IFAC'93, Sydney, 1993, pp. 435-442.
 H. Takami, "Design of an optimal servo-controller for current control in a permanent magnet synchronous motor," in Proc. IEE -Control Theory and Applications, vol. 149, no. 6, pp. 564-572, Nov. 2002.
T. Fujii, Y. Nishimura, S. Shimomura, and S.Kawarabayashi, "A Practical Approach to LQ Design and Its Application to Engine Control," in Proc. IFAC'87, Munich, 1987, pp. 253-258.