Browsing by Author "Hsieh, Chien-Shu"

Now showing 1 - 4 of 4

A feedback linearization design for the control of vehicle's lateral dynamics
(2006)
Liaw, Der-Cherng
;
Chung, Wen-Ching
;
Song, Chau-Chung
;
Hsieh, Chien-Shu
;
電控工程研究所
In this paper, the feedback linearization scheme is applied to the control of vehicle's lateral dynamics. Based on the assumption of constant driving speed, a second-order nonlinear lateral dynamical model is adopted for controller design. It was observed in Liaw and Chung (2006) that the saddle-node bifurcation would appear in vehicle dynamics with respect to the variation of the front wheel steering angle, which might result in spin and/or system instability. Feedback linearization control laws are proposed in this paper to stabilize the vehicle's dynamics at bifurcation points. Numerical simulations for an example model demonstrate the effectiveness of the analytical results.
CONTINUOUS- AND DISCRETE-TIME FIXED-GAIN CONTROLLER DESIGNS FOR THE CONTROL OF VEHICLE LATERAL DYNAMICS
(2012-03-01)
Hsieh, Chien-Shu
;
Liaw, Der-Cherng
;
電機工程學系
;
Department of Electrical and Computer Engineering
In this paper, fixed-gain feedback linearization controls are presented to stabilize the vehicle lateral dynamics at bifurcation points for both continuous-time and discrete-time cases. Based on the assumption of constant driving speed, a second-order nonlinear lateral dynamics model is adopted for controller design. Via the feedback linearization scheme and the first-order Taylor series expansion, a time-invariant feedback linearization control is proposed as a fixed-gain linear version of the previously proposed nonlinear one. Furthermore, the conventional linear quadratic regulator (LQR) design is applied to facilitate the choice of the fixed-gain matrix. Refined controls to compensate the model uncertainty and their local stability analysis are provided. Extension of the continuous-time design results to discrete-time cases is also addressed. Numerical simulations for an example model demonstrate the effectiveness of the proposed continuous-time and discrete-time design results.
Control design for longitudinal flight dynamics
(2006)
Liaw, Der-Cherng
;
Chung, Wen-Ching
;
Hsieh, Chien-Shu
;
電控工程研究所
;
Institute of Electrical and Control Engineering
In this paper, the control issues of longitudinal flight dynamics is presented. System controllability with respect to the variation of the elevator deflection angle is first discussed Stabilization controllers using washout filter-aided feedback control law is then proposed Case study for F-8 aircraft is explicitly derived for constructing a feasible set of controllers. Numerical simulations for bifurcation scenarios are also given to compare the performance of the designs.
Optimal Filtering Methods to Structural Damage Estimation under Ground Excitation
(2013)
Hsieh, Chien-Shu
;
Liaw, Der-Cherng
;
Lin, Tzu-Hsuan
;
電機工程學系
;
Department of Electrical and Computer Engineering
This paper considers the problem of shear building damage estimation subject to earthquake ground excitation using the Kalman filtering approach. The structural damage is assumed to take the form of reduced elemental stiffness. Two damage estimation algorithms are proposed: one is the multiple model approach via the optimal two-stage Kalman estimator (OTSKE), and the other is the robust two-stage Kalman filter (RTSKF), an unbiased minimum-variance filtering approach to determine the locations and extents of the damage stiffness. A numerical example of a six-storey shear plane frame structure subject to base excitation is used to illustrate the usefulness of the proposed results.