1) Bilinear system control and state estimation.
2) Robust observer design for systems subject to unknown disturbances.
3) Sliding mode control with chattering reduction by filtering.
4) Nonlinear noise reduction in signal processing.
5) Renewable energy study: second-generation wind power, solar thermal power.

1. 1991, "A vibration control system driven by hydraulic actuator,"
   NSC-80-0401-E-002-01.
2. 1992, "Data-based robust control design,"
   NSC-81-0401-E-002-554.
3. 1993, "Systematic control design for nonlinear systems,"
   NSC-83-0401-E-002-127.
4. 1994, "Self-tuning adaptive control of a system with state space representation,"
   NSC-84-2212-E-002-014.
5. 1995, "Control of linear time-varying systems,"
   NSC-85-2212-E-002-001.
6. 1996, "Robust control of systems with un-matched uncertainties,"
   NSC-86-2212-E-002-037.
7. 1997, "Control design based on identification algorithms,"
   NSC-87-2218-E-002-031.
8. 1998, "Linear time-varying system control based on the forward Riccati equation,"
   NSC-88-2213-E-002-088.
9. 1999, "Bilinear system control,"
   NSC-89-2213-E-002-087.
10. 2000, "多馬達驅動之動態研究（Ⅱ）─系統測試與改進,"
    NSC-89-CS-7-082-006-..
11. 2001, "非線性系統之最佳運動規劃,"
    NSC-90-2212-E-002-214-
12. 2002, "電動機車能量管理系統之設計,"
    NSC-1-2623-7-002-018-ET
13. 2003, "無漂移系統之片段閉迴路控制,"
    NSC-91-2213-E-002-058-
14. 2003, "掃描平台之系統分析與伺服設計,"
    NSC-92-2623-7-002-011-
15. 2004, "根據軌跡攔截法的無飄移系統部分狀態轉移控制,"
    NSC-93-2218-E-002-108-

[2]. M. S. Chen, and M. Tomizuka, ”A new nonlinear controller for uncertain linear
systems with arbitrarily structured uncertainties,” Control and Dynamic Systems,
Advance in Theory and Applications, vol. 34, pp. 155 - 174, Academic Press, 1990.

[3]. Y. W. Liau, and M. S. Chen, ”A balanced robust LQG design,” Journal of The
Chinese Society of Mechanical Engineering, vol. 13, pp. 277 – 280, 1992.

[4]. M. S. Chen, ”Decentralized control of a class of large-scale systems by uncertainty
estimator,” ASME Trans. Journal of Dynamic Systems, Measurement, and
Control, vol. 115, pp. 7 – 11, 1993.

[5]. M. S. Chen, and C. F. Song, ”Global stabilization for a class of nonlinear systems,”
Journal of Control Systems and Technology, vol. 2, no. 2, pp. 91 – 99, 1994.

[6]. M. S. Chen, ”Generalized Bass-Gura formula for the control of linear time-varying
systems,” Journal of Control Systems and Technology, vol. 3, no. 3. pp. 163-169, 1995.

[7]. M. S. Chen, and F. L. Chiou, ”A data-based tracking control design for non-minimum-phase
systems,” Journal of The Chinese Society of Mechanical Engineering, vol. 17, no. 6, pp.555-564, 1996.

[8]. M. S. Chen, and Y. H. Huang, ”A control design for linear time-varying systems
based on the inversion transformation,” Automatica, vol. 33, no. 4, pp.683-688, 1997.

[9]. M. S. Chen, and R. J. Fu, ”An observer-based state feedback control of parametrically
excited systems,” Systems and Control Letters, vol. 30, pp. 119-125, 1997.

[10]. M. S. Chen, and C. Y. Kao, ”Control of linear time-varying systems using forward
Riccati equation,” ASME Trans. Journal of Dynamic Systems, Measurement,
and Control, vol. 119, pp.536-540, 1997.

[11]. M. S. Chen, and G. H. Tarng, ”Robust control for SISO systems with mismatched
uncertainties,” Journal of Control Systems and Technology, vol. 5, no. 3, pp.171-180, 1997.

[12]. J. M. Wu, and M. S. Chen, ”Boundary control of a string with a tip mass,” Bulletin
of the College of Engineering, N.T.U., no. 71, pp.107-119, 1997.

[13]. M. S. Chen, and R. J. Fu, ”An active control design for a class of parametrically excited
systems based on the gradient algorithm,” ASME Trans. Journal of Vibrations and Accoustics, vol. 120, pp. 727-732, 1998.

[14]. M. S. Chen, ”A tracking controller for linear time-varying systems,” ASME Trans.
Journal of Dynamic Systems, Measurement, and Control, vol. 120, pp. 111-116, 1998.

[15]. M. S. Chen, and G. H. Tarng, ”Almost disturbance decoupling control,” Journal
of Control Systems and Technology, vol. 5, no. 4, pp. 253-261, 1998.

[16]. M. S. Chen, ”Exponential stabilization of a constrained bilinear system,” Automatica,
vol. 34, no. 8, pp.989-992, 1998.

[17]. M. S. Chen, and Y. Z. Chen, ”Static ouput feedback control for periodically linear
time-varying systems,” IEEE Trans. Automatic Control, vol. 44, no. 1, pp.218-222, 1999.

[18]. M. S. Chen, and J. Y. Yen, ”Application of the least-squars algorithm to the observer
design for linear time-varying systems,” IEEE Trans. Automatic Control, vol. 44, no. 9, pp. 1742-1745, 1999.

[19]. M. S. Chen, and S. T. Tsao, ”Exponential stabilization of open-loop unstable bilinear
systems,” IEEE Trans. Automatic Control, vol. 45, no. 5, pp. 989-992, 2000.

[20]. M. S. Chen, and J. M. Wu, ”A new model reference adaptive control for linear timevarying
systems,” International J. of Adaptive Control and Signal Processing, vol. 14, 469-479, 2000.

[21]. C. M. Huang, J. Y. Yen, and M. S. Chen, ”Adaptive nonlinear control of repulsive
maglev suspension systems,” Control Engineering Practice, vol. 8, pp. 1357-1367, 2000.

[22]. M. S. Chen, Y. R. Hwang, M. Tomizuka, ”A state-dependent boundary layer design
for sliding mode control,” IEEE Trans. Automatic Control, vol. 47, no. 10, pp. 1677-1681, 2002.

[23]. T. Wu, and M. S. Chen, ”Chaos Control of the modified Chua’s circuit system,”
Physica D, vol. 164, pp. 53-58, 2002.

[24]. M. S. Chen, Y. Z. Chen, ”Normalised quadratic controls for a class of bilinear
systems,” IEE Proc.-Control Theory Appl., vol. 149, no. 6, pp.502-524, 2002.

[25]. M. S. Chen, Y. R. Hwang, ”Nonlinear controls for a class of discrete-time bilinear
systems,” International J. of Robust and Nonlinear Control, vol.13, pp.1079-1090, 2003.

[26]. Y. R. Hwang, M. S. Chen, and T. Wu, ”Divison controlllers for homogeneous dyadic
bilinear systems,” IEEE Trans. Automatic Control, vol.48 , no.4, pp.701-705, 2003.

[27]. M. S. Chen, Y. R. Hwang, and Y. J. Kuo, ”Exponentially stabilizing divison controlllers
for dyadic bilinear systems,” IEEE Trans. Automatic Control, vol.48, no. 1, pp. 106-110, 2003.

[28]. W. S. Chen, P. M. Ma, H. L. Liu, C. K. Yeh, M. S. Chen, and C. W. Chang, ”A
novel method for estimating the focal size of two confocal high-intensity focused ultrasound
transducers,” J. Acoust. Soc. Am., 117(6), pp. 3740-3749, 2005.

[29]. M. S. Chen, C. H. Chen, F. Y. Yang, ”An LTR-observer-based dynamic sliding mode
control for chattering reduction,” Automatica, vol. 43, no. 6, pp. 1111-1116, 2007.

[30]. M. S. Chen, Chi-Che Chen, ”Robust nonlinear observer for Lipschitz nonlinear
systems subject to disturbances,” IEEE Trans. Automatic Control, vol. 52, no. 12, pp. 2365-2369, 2007

[31]. M. S. Chen, Chi-Che Chen, ”Output feedback control of bilinear systems via a
bilinear LTR observer,” IEEE Trans. Automatic Control, vol. 53, no. 2, pp. 617-621, 2008.

[32]. M. S. Chen, Jyun-Sian Li, Po-Ching Wu, ”A matrix gradient algorithm for identification of parameterized time-varying parameters,” Asian Journal of Control, vol. 11, no. 1, pp. 59-65, 2009.