Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME

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Advances in Nonlinear Wheel/Rail Force Prediction Methods and Their Validation
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 104 Số 2 - Trang 133-142 - 1982
J A Elkins, Bridget Eickhoff
Improvements have been made to the nonlinear wheel / rail force prediction method of Elkins and Gostling. These improvements are described, along with the experimental equipment used in order to provide input data for the predictions, and to validate them. A further series of curving tests, using a Laboratory Coach equipped with bogies having variable suspension parameters, has been carrie...... hiện toàn bộ
Adaptive Controller and Observer Design for a Class of Nonlinear Systems
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 128 Số 3 - Trang 712-717 - 2006
Yongliang Zhu, Prabhakar R. Pagilla
Abstract Design of a stable adaptive controller and observer for a class of nonlinear systems that contain product of unmeasurable states and unknown parameters is considered. The nonlinear system is cast into a suitable form based on which a stable adaptive controller and observer are designed using a parameter dependent Lyapunov function. The class...... hiện toàn bộ
A Review of Feedforward Control Approaches in Nanopositioning for High-Speed SPM
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 131 Số 6 - 2009
Garrett M. Clayton, S. Tien, Kam K. Leang, Qingze Zou, Santosh Devasia
Control can enable high-bandwidth nanopositioning needed to increase the operating speed of scanning probe microscopes (SPMs). High-speed SPMs can substantially impact the throughput of a wide range of emerging nanosciences and nanotechnologies. In particular, inversion-based control can find the feedforward input needed to account for the positioning dynamics and, thus, achieve the requir...... hiện toàn bộ
Preview-Based Stable-Inversion for Output Tracking of Linear Systems
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 121 Số 4 - Trang 625-630 - 1999
Qingze Zou, Santosh Devasia
Stable Inversion techniques can be used to achieve high-accuracy output tracking. However, for nonminimum phase systems, the inverse is noncausal—hence the inverse has to be precomputed using a prespecified desired-output trajectory. This requirement for prespecification of the desired output restricts the use of inversion-based approaches to trajectory planning problems (for nonminimum ph...... hiện toàn bộ
Analysis and Synthesis of Discrete-Time Repetitive Controllers
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 111 Số 3 - Trang 353-358 - 1989
Masayoshi Tomizuka, Tsu‐Chin Tsao, Kok-Kia Chew
Repetitive control is formulated and analyzed in the discrete-time domain. Sufficiency conditions for the asymptotic convergence of a class of repetitive controllers are given. The “plug-in” repetitive controller is introduced and applied to track-following in a disk-file actuator system. Inter-sample ripples in the tracking error were present when the “plug-in” repetitive controller was i...... hiện toàn bộ
K-Fold Exosystem and the Robust Nonlinear Servomechanism Problem
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 120 Số 1 - Trang 149-153 - 1998
Jie Huang
Asymptotic tracking and disturbance rejection in uncertain nonlinear systems is studied in the context of output feedback control. This study is facilitated by formalizing the notion of k-fold exosystem and generalizing the internal model principle to the nonlinear setting.
Control of Cutting Force for Creep-Feed Grinding Processes Using a Multi-Level Fuzzy Controller
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 129 Số 4 - Trang 480-492 - 2007
Chengying Xu, Yung C. Shin
In this paper, a multi-level fuzzy control (MLFC) technique is developed and implemented for a creep-feed grinding process. The grinding force is maintained at the maximum allowable level under varying depth of cut, so that the highest metal removal rate is achieved with a good workpiece surface quality. The control rules are generated heuristically without any analytical model of the grin...... hiện toàn bộ
Adaptive Pulse Width Control for Precise Positioning Under the Influence of Stiction and Coulomb Friction
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 110 Số 3 - Trang 221-227 - 1988
Sangsik Yang, Masayoshi Tomizuka
Conventional linear digital control fails to provide precise positioning of a control object under the influence of static friction, Coulomb friction, and backlash. This paper presents an adaptive pulse width control (PWC) scheme for a precise point-to-point positioning system. This scheme is developed based on the relationship between the displacement of a control object due to a single p...... hiện toàn bộ
Design of Digital Feedforward/Preview Controllers for Processes With Predetermined Feedback Controllers
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 102 Số 4 - Trang 218-225 - 1980
Masayoshi Tomizuka, D. H. Fung
This paper deals with the design of digital feedforward/preview (F/P) controllers for multi-input, multi-output processes with predetermined feedback controllers. The feedback controller is assumed to include an integral action which operates upon the error between setpoint and process output. The feedforward/preview controller is a weighted sum of previewed values of future disturbances. ...... hiện toàn bộ
Zero Phase Error Tracking Algorithm for Digital Control
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME - Tập 109 Số 1 - Trang 65-68 - 1987
Masayoshi Tomizuka
A digital feedforward control algorithm for tracking desired time varying signals is presented. The feedforward controller cancels all the closed-loop poles and cancellable closed-loop zeros. For uncancellable zeros, which include zeros outside the unit circle, the feedforward controller cancels the phase shift induced by them. The phase cancellation assures that the frequency response bet...... hiện toàn bộ
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