Journal Papers
2015年〜
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D. Tsubakino, S. Hara, Backstepping observer design for parabolic PDEs with measurement of weighted spatial averages,Automatica 53,179-187, (2015)
2010年〜2014年
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M. Takada, Y. Hori, S. Hara, Comments and Corrections on “Stability of Genetic Regulatory Networks With Time Delay”,IEEE Transakuctions on Circuits and Systems-I: REGULAR PAPERS, 61 [9], 2771-2774, (2014)
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G. Pipeleers, T. Iwasaki, S. Hara, Generalizing the KYP Lemma to Multiple Frequency Intervals,SIAM Journal on Control and Optimization 52 (6), 3618-3638, (2014)
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S. Hara, H. Tanaka, T. Iwasaki, Stability analysis of systems with generalized frequency variables Automatic Control, IEEE Transactions on 59 [2], 313-326, (2014)
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DH. Nguyen, S. Hara, Entrainment Analysis in Goodwin-Type Nonlinear Oscillator Networks Driven by External Periodic Signals,SICE Journal of Control, Measurement, and System Integration 7 [6], 337-346 , (2014)
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T. Nakamura, Y. Hori, S. Hara, Hierarchical Modeling and Local Stability Analysis for Repressilators Coupled by Quorum Sensing,SICE Journal of Control, Measurement, and System Integration 7 [3], 133-140, (2014)
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C. Kojima, S. Hara, Characterization of Finite Frequency Properties for n-Dimensional Behaviors Using Quadratic Differential Forms,SICE Journal of Control, Measurement, and System Integration 7 [2], 112-121, (2014)
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Y. Wang, Y. Hori, S. Hara, F Doyle,Intercellular delay regulates the collective period of repressively coupled gene regulatory oscillator networks,IEEE Transactions on Automatic Control, 59 [1],211-216, (2014)
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Y. Hori, M. Takada, S. Hara, Biochemical oscillations in delayed negative cyclic feedback: Existence and profiles,Automatica 49 [9], 2581-2590, (2013)
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M. Kanno, S. Hara, Symbolic-numeric hybrid optimization for plant/controller integrated design in H∞ loop-shaping design, Journal of Math-for-Industry (JMI) 4, 135-140, (2012)
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D. Tsubakino, S. Hara, Eigenvector-based intergroup connection of low rank for hierarchical multi-agent dynamical systems, Systems & Control Letters 61 [2], 354-361, (2012)
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Y. Hori, T.-H. Kim and S. Hara,
"Existence Criteria of Periodic Oscillations in Cyclic Gene Regulatory Networks",
Automatica, 47 [6] (special issue on Systems Biology), 1203-1209, (2011)
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T.-H. Kim, Y. Hori and S. Hara,
"Robust Stability Analysis of Gene-protein Regulatory Networks with Cyclic Activation repression Interconnections",
Systems & Control Letters, 60 [6], 373-382, (2011)
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H. Ishii, K. Okano, S. Hara,
"Achievable sensitivity bounds for MIMO control systems via an information theoretic: approach",
Systems & Control Letters, 60 [2], 111-118, (2011)
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T. Sasaki S. Hara, K. Tsumura,
"Local State Transition of Feedback Controlled Quantum Systems with Imperfect Detector Efficiency: Part I: Differential Geometric Analysis for Dynamical Systems with Matrix-valued Systems",
SICE Journal of Control, Measurement, and System Integration, 3 [6], 409-416, (2010)
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T. Sasaki, S. Hara, K. Tsumura,
"Local State Transition of Feedback Controlled Quantum Systems with Imperfect Detector Efficiency: Part II: Accessibility Analysis for Quantum Systems",
SICE Journal of Control, Measurement, and System Integration, 3 [6], 417-423, (2010)
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C. Kojima, Y. Kaizuka and S. Hara,
"Characterization of Finite Frequency Properties Using Quadratic Differential Forms",
SICE Journal of Control, Measurement, and System Integration, 3 [6], 466-475, (2010)
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T.H. Kim, S. Hara, Y. Hori,
"Cooperative control of multi-agent dynamical systems in target-enclosing operations using cyclic pursuit strategy",
International Journal of Control, 83 [10], 2040-2052, (2010)
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H. Fujioka, S. Hara,
"Output Regulation for Sampled Data Feedback Control Systems:
Internal Model Principle and H-infinity Servo Controller Synthesis",
Journal of the Chinese Institute of Engineers, 33 [3], Sp. Iss. 2040-2052, (2010)
2005年〜2009年
- S. Hara, T. Hayakawa, H. Sugata, "LTI Systems with
Generalized Frequency Variables: A Unified Framework for Homogeneous
Multi-agent Dynamical Systems", SICE Journal of Control, Measurement,
and System Integration, 2 [5], 299-306, (2009)
- H. Anai, S. Hara, M. Kanno, et al., "Parametric polynomial
spectral factorization using the sum of roots and its application to a
control design problem", Journal of Symbolic Computation, 44 [7], Sp.
Iss. 703-725, (2009)
- S. Hara, T. Iwasaki, "Sum-of-Squares Decomposition via
Generalized KYP Lemma", IEEE Transactions on Automatic Control, 54 [5],
1025-1029, (2009)
- K. Okano, S. Hara and H. Ishii, "Characterization of a
complementary sensitivity property in feedback control: An information
theoretic approach", Automatica, 45 [2], 504-509, (2009)
- J. Chen, S. Hara, L. Qiu et al., "Best Achievable Tracking
Performance in Sampled-Data Systems via LTI Controllers", IEEE
Transactions on Automatic Control, 53 [11], 2467-2479 (2008)
- X. Xin, S. Hara and M. Kaneda, "Reduced-order proper H infinity
controllers for descriptor systems: Existence conditions and LMI-based
design algorithms", IEEE Transactions on Automatic Control, 53 [5],
1253-1258 (2008)
- H. Ishii and S. Hara, "A subband coding approach to control under
limited data rates and message losses", Automatica, 44 [4], 1141-1148
(2008)
- T. Bakhtiar and S. Hara,
"H_2 regulation performance limitations for SIMO linear time-invariant
feedback control systems", Automatica, 44 [3], 659-670 (2008)
- S. Hara and M. Kanno, "Sum of Roots Characterization for H_2
Control Performance Limitations", SICE Journal of Control, Measurement,
and System Integration, 1 [1], 58-65 (2008)
- N. Hyodo, M. Hong M, H. Yanami, S. Hara, and H. Anai, "Solving
and visualizing nonlinear parametric constraints in control based on
quantifier elimination", Applicable Algebra in Engineering
Communication and Computing, 18 [6]: 497-512 (2007)
- N. Yamamoto and S. Hara,
"Relation between fundamental estimation limit and stability in linear
quantum systems with imperfect measurement", Physical Review A, 76 [3]
(2007)
- N. Yamamoto, K. Tsumura and S. Hara,
"Feedback control of quantum entanglement in a two-spin system",
Automatica, 43 [6], 981-992 (2007)
- S. Hara, T. Bakhtiar and M. Kanno, "The Best Achievable H_2
Tracking Performances for SIMO Feedback Control Systems", Journal of
Control Science and Engineering (2007)
- H. Anai, S. Hara,
"A parameter space approach to fixed-order robust controller synthesis
by quantifier elimination",
International Journal of Control, 79 [11], 1321-1330 (2006)
- I. Kajiwara, K. Hoshino, S. Hara, et al.,
"Tracking control and system development for laser-driven
micro-vehicles",
Transactions of the Japan Society for Aeronautical and Space Sciences,
49 [164], 71-76 (2006)
- Y. Iwatani, S. Hara,
"Stability tests and stabilization for piecewise linear systems based
on poles and zeros of subsystems",
Automatica, 42 [10], 1685-1695 (2006)
- T. Iwasaki, S. Hara,
"Feedback Control Synthesis of Multiple Frequency Domain Specifications
via Generalized KYP Lemma",
to appear in International Journal of Robust and Nonlinear Control
(2006)
- S. Hara, T. Iwasaki, D. Shiokata,
"Robust PID Using Generalized KYP Synthesis: Direct open-loop shaping
in multiple frequency ranges",
IEEE Control System Magazine, 26 [1], 80-91 (2006)
- T. Kiyama, S. Hara, T. Iwasaki,
"Effectiveness and limitation of circle criterion for LTI robust
control systems with control input nonlinearities of sector type",
International Journal of Robust and Nonlinear Control, 15, 873-901
(2005)
- N. Yamamoto, S. Hara, K. Tsumura,
"Suboptimal quantum-error-correcting procedure based on Semidefinite
programming",
Physical Review A, 71 [2] (2005)
- T. Iwasaki, S. Hara, A. L. Fradkov,
"Time domain interpretations of frequency domain inequalities on
(semi)finite ranges",
Systems & Control Letters, 54 [7], 681-691 (2005)
- T. Iwasaki, S. Hara,
"Generalized KYP Lemma: Unified Frequency Domain Inequalities With
Design Applications",
IEEE Transactions on Automatic Control, 50 [1], 41- 59 (2005)
2000年〜2004年
- T. Iwasaki, S. Hara, K. Yamauchi,
"Dynamical System Design from a Control Perspective: Finite Frequency
Positive-Realness Approach",
IEEE Transactions on Automatic Control, 48 [8], 1327-1354 (2003)
- J. Chen, S. Hara, G. Chen,
"Best Tracking and Regulation Performance under Control Energy
Constraint",
IEEE Transactions on Automatic Control, 48 [8], 1320-1336 (2003)
- T. Asai, S. Hara,
"Some conditions which make the constantly scaled H-infinity control
synthesis problems convex",
International Journal of Robust and Nonlinear Control, 12, 21-39 (2002)
- Y. Yamada, S. Hara,
"Global optimization for robust control synthesis based on the Matrix
Product Eigenvalue Problem",
International Journal of Robust and Nonlinear Control, 11, 857-878
(2001)
- J. Chen, Z. Ren, S. Hara,
"Optimal Tracking Performance: Preview Control and Exponential
Signals",
IEEE Transactions on Automatic Control, 46 [10], 619-630 (2001)
- S. Vorapojpisut, S. Hara,
"A General Framework for a Class of Autonomous Hybrid Systems",
Stability Analysis, Stabilizing Control, and H-infinity Control;
Simulation, 19 [3], 220-227 (2000)
- T. Asai, S. Hara, T. Iwasaki,
"Simultaneous Parametric Uncertainty Modeling and Robust Control
Synthesis by LFT Scaling",
Automatica, 36, 1457-1467 (2000)
1990〜1999年
- B. D. O. Anderson, K. Chongsrid, D. J. N. Limebeer, S. Hara,
"Direct Reduced Order Discretization of Continuous-Time Controller",
International Journal of Robust and Nonlinear Control, 9, 143-155
(1999)
- T. Asai, S. Hara,
"A unified approach to LMI-based reduced order self-scheduling control
synthesis",
Systems & Control Letters, 36, 75-86 (1999)
- H. Tokunaga, T. Iwasaki, S. Hara,
"Analysis and synthesis of the robust impulse-to-peak performance",
Automatica, 34 [11], 1473-1477 (1998)
- T. Kimura, S. Hara, T. Fujita, T. Kagawa,
"Feedback Linearization for Pneumatic Actuator Systems with Static
Friction",
Control Engineering Practice, 5 [10], 1385-1394 (1997)
- T. Iwasaki, S. Hara,
"Well-Posedness of Feedback Systems: Insights into Exact Robustness
Analysis and Approximate Computations",
IEEE Transactions on Automatic Control, 43 [5], 619-630 (1998)
- Y. Yamada, S. Hara,
"Global Optimization for H-infinity Control with Constant Diagonal
Scaling",
IEEE Transactions on Automatic Control, 43 [2], 191-203 (1998)
- T. Iwasaki, S. Hara, M. A. Rotea,
"Computational Complexity Reduction in Scaled H-infinity Synthesis",
Automatica, 33 [7], 1325-1332 (1997)
- J. Hozumi, S. Hara, H. Fujioka,
"Robust Servo Problem with H-infinity Norm Constraint",
International Journal of Control, 66 [6], 803-823 (1997)
- M. Kojima, S. Shindo, S. Hara,
"Interior-Point Methods For The Monotone Semidefinite Liner
Complementarity Problem In Symmetric Matrices",
SIAM Journal on Optimization, 7 [4], 502-509 (1997)
- Y. Yamada, S. Hara, H. Fujioka,
"「コ-Feasibility for H-infinity Control Problem with Constant Diagonal
Scaling",
Transactions of the SICE, Japan, 33 [3], 155-162 (1997)
- Y. Yamada, S. Hara,
"An LMI approach to local optimization for constantly scaled H-infth
control problems",
International Journal of Control, 67 [2], 233-250 (1997)
- S. Hara, B. D. O. Anderson, H. Fujioka,
"Relating H2- and Hinfinity-Norm Bounds for Sampled-Data Systems",
IEEE Transactions on Automatic Control, 42 [6], 858-863 (1997)
- K. Chongsrid, S. Hara,
"Sampled-Data Balanced Truncation and Its Applications to Low Order
Digital Controller Design",
Transactions of the SICE, Japan, 33 [5], 384-391 (1997)
- S. Hara, H. Fujioka, T. Kosugiyama, T. Asai,
"A Sysnthesis for Robust Tracking Systems Based on H-infinity Control",
Transactions of the SICE, Japan, 32 [4], 502-509 (1996)
- T. Asai, S. Hara,
"Robust Stabilization of the Uncertain Linear Systems Based on
Descriptor Form Representation",
Transactions of the SICE, Japan, 31 [8], 1037-1046 (1995)
- K. Chongsrid, S. Hara,
"Hankel Norm of Sampled-Data Systems",
IEEE Transactions on Automatic Control, 40 [11], 1939-1942 (1995)
- H. Fujioka, S. Hara,
"State covariance assignment for sampled-data feedback control
systems",
International Journal of Control, 61 [3], 719-737 (1995)
- Y. Hayaka, S. Hara, Y. Yamamoto,
"H-infinity Type Problem for Sampled-Data Control Systems / A solution
via Minimum Energy Characterization",
IEEE Transactions on Automatic Control, 39 [11], 2278-2284 (1994)
- T. Kimura, S. Hara,
"Frequency-restricted Norm Bounds for Interval Systems",
International Journal of Robust and Nonlinear Control, 4, 575-593
(1994)
- S. Hara, H. Fujioka,
"A Hybrid State-space Approach to Sampled-Data Feedback Control",
Linear Algebra and Its Applications, 205-206, 675-712 (1994)
- H. Fujioka, S. Hara,
"State Covariance Assignment Problem with Measurement Noise : A Unified
Approach Based on Symmetric Matrix Equation",
Linear Algebra and Its Applications, 203-204, 579-605 (1994)
- P. T. Kabamba, S. Hara,
"Worst-Case Analysis and Design of Sampled Data Control Systems",
IEEE Transactions on Automatic Control, 38 [9], 1337-1357 (1993)
- S. Hara, T. Sugie, R. Kondo,
"H-infinity Control Problem with j-omega-axis Zeros",
Automatica, 28 [1], 55-70 (1992)
- S. Hara, T. Sugie,
"Inner-outer factorization for strictly proper functions with jω-axis
zeros",
Systems & Control Letters, 16, 179-185 (1991)
1980〜1989年
- S. Hara, H.-k.Sung, "Constraints on Sensitivity Characteristics
in Linear Multivariable Discrete-Time Control Systems",
Linear Algebra and its Applications, 122/123/124, 889-919 (1989)
- R. Kondo, S. Hara,
"On cancellation in H-infinity optimal controllers",
Systems & Control Letters, 13, 205-210 (1989)
- S. Hara, H.-k.Sung,
"Sensitivity improvement by a stable controller in SISO digital control
systems",
Systems & Control Letters, 12, 123-128 (1989)
- T. Sugie, S. Hara,
"H-infinity-suboptimal control problem with boundary constraints",
Systems & Control Letters, 13, 93-99 (1989)
- S. Hara, H. Katori, R. Kondo,
"The Relationship Between Real Poles and Real Zeros in SISO Sampled
Data Systems",
IEEE Transactions on Automatic Control, 34 [6], 632-635 (1989)
- H.-k.Sung, S. Hara,
"Properties of complementary sensitivity function in SISO digital
control systems",
International Journal of Control, 50 [4], 1283-1295 (1989)
- S. Hara, R. Kondo, H. Katori,
"Properties of zeros in digital control systems with computational time
delay",
International Journal of Control, 49 [2], 493-511 (1989)
- Y. Yamamoto, S. Hara,
"Relationships between Internal and External Stability for
Infinite-Dimensional Systems with Applications to a Servo Problem",
IEEE Transactions on Automatic Control, 33 [11], 1044-1052 (1988)
- S. Hara, Y. Yamamoto, T. Omata, M. Nakano,
"Repetitive control system: A New type servo system for Periodic
Exogenous Signals",
IEEE Transactions on Automatic Control, 33 [7], 659-668 (1988)
- H.-k.Sung, S. Hara,
"Properties of sensitivity and complementary sensitivity functions in
single-input single-output digital control systems",
International Journal of Control, 48 [6], 2429-2439 (1988)
- S. Hara, T. Sugie,
"Independent Parameterization of Two-Degree-of-Freedom Compensators in
General Robust Tracking Systems",
IEEE Transactions on Automatic Control, 33 [1], 59-67 (1988)
- R. Kondo, S. Hara, K. Furuta,
"Design of Type-1 Servo Systems Possessing Prescribed Stability Margins
Using a Generalized Riccati-type Equation",
International Journal of Control, 46 (1987)
- T. Omata, S. Hara, M. Nakano,
"Nonlinear Repetitive Control with Application to Trajectory Control of
Manipulato",
Journal of Robotic Systems, 4 [5], 631-652 (1987)
- S. Hara,
"Parametrization of Stabilizing Controllers for Multivariable Servo
Systems with Two Degrees of Freedom",
International Journal of Control, 45 [3], 779-790 (1987)
- S. Hara, H. Katori,
On constrained H^{∞}optimization Problems for SISO Systems",
IEEE Transactions on Automatic Control, 31 [9], 856-858 (1986)
- S. Hara, N. Kobayashi, T. Nakamizo,
"Design of non-undershooting multivariable Servo System Using Dynamic
Compensators",
International Journal of Control, 44 [2], 331-342 (1986)
- S. Hara, I. Akahori, M. Kaneda,
"Computer Aided Control System Analysis Using Symbolic Manipulation
With Numerical Computation",
Control-Theory and Advanced Tech., 2 [3], 345-365 (1986)
- S. Hara,
"Unknown Input Observability for Discrete-time Linear Multivariable
Systems and its Application",
International Journal of Control, 39 [5], 1043-1050 (1984)
1976〜1979年
- S. Hara, K. Furuta,
"Observability for bilinear systems",
International Journal of Control, 26, 559-572 (1977)
- K. Furuta, S. Hara, S. Mori,
"A Class of Systems with the Same Observer",
IEEE Transactions on Automatic Control, 21 [4], 572-576 (1976)
- S. Hara, K. Furuta, "Minimal Order State Observer for Bilinear
Systems",
International Journal of Control, 24 [5], 705-718 (1976)