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
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
carried out, a...
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
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 of nonlinear systems considered
is practically ...
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
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 required preci...
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
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 phase syst...
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
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
installed...
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
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
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
grinding pro...
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
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 pulse
inp...
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
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. Formula ...
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
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 between the...
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