Proceedings of the American Control Conference

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Motion control of precision positioning systems using adaptive compensation
Proceedings of the American Control Conference - Tập 6 - Trang 4589-4594 vol.6 - 2002
Bong Keun Kim, Wan Kyun Chung
In this paper, an adaptive motion control method is proposed for high-accuracy positioning systems with nonlinear friction and parameter uncertainties. Based on the control input redesign framework for disturbance compensation, a unified control structure of an adaptive compensator and feedback motion controller is designed. Adaptive control which can reduce the uncertainties of system parameters ...... hiện toàn bộ
#Motion control #Adaptive systems #Programmable control #Adaptive control #Feedback #Error correction #Friction #Uncertain systems #Uncertainty #Stability analysis
WPT-SVMs based approach for fault detection of valves in reciprocating pumps
Proceedings of the American Control Conference - Tập 6 - Trang 4566-4570 vol.6 - 2002
Fujun He, Wengang Shi
This paper presents a novel approach for fault detection of valves in three-cylinder reciprocating pumps. Since the vibration signals collected from pumps apparently show the existence of non-stationary signals and the interference of neighboring valves, the wavelet packet transform (WPT) is introduced as a preprocessing means of extracting time-frequency information from vibration signals to obta...... hiện toàn bộ
#Fault detection #Valves #Fault diagnosis #Pumps #Interference #Wavelet packets #Wavelet transforms #Data mining #Time frequency analysis #Support vector machines
Sliding mode observer based fault detection and isolation in descriptor systems
Proceedings of the American Control Conference - Tập 6 - Trang 4543-4548 vol.6 - 2002
T.K. Yeu, S. Kawaji
This paper considers the application of sliding mode observer to the problem of fault detection and isolation for descriptor system with input fault and measurement fault. In detecting and isolating the faults, we consider two cases where there exists only an input fault, and a measurement fault without the input fault in the system respectively. For each case, we propose an approach for designing...... hiện toàn bộ
#Fault detection #Stability #Observers #Lyapunov method #Hardware #Redundancy #Isolation technology #Automatic control #Voting #Costs
Convex methods in actuator placement
Proceedings of the American Control Conference - Tập 6 - Trang 4309-4314 vol.6 - 2002
D.J. Chmielewski, Jui-Kun Peng, A.M. Manthanwar
A new formulation of the actuator placement problem is presented. This formulation considers capital cost in the objective function and highlights the importance of magnitude limits on both input and output signals through variance bounding constraints on each. Thus, the proposed optimization problem is aimed at finding the set of minimum cost actuator arrays such that there exists a linear feedba...... hiện toàn bộ
#Chemical technology #Cost function #Feedback #Automatic control #Chemical engineering #Hydraulic actuators #Design methodology #Inductors #Distributed parameter systems #Instruments
Index of Authors, Chairpersons, and Organizers
Proceedings of the American Control Conference - Tập 4 - Trang 3407-3419 - 2002
Presents an index of the authors whose papers are published in the conference.
Disturbance rejection for nonlinear systems
Proceedings of the American Control Conference - Tập 5 - Trang 3484-3489 vol.5 - 2002
Zongxuan Sun, Tsu-Chin Tsao
Tracking or rejection of unknown exogenous signals with known generating dynamics is of major concern in feedback control design. Linear feedback control based on the internal model principle achieves asymptotic performance for linear systems with linear exogenous signal dynamics. This paper presents a control design based on the internal model principle to track or reject nonlinear exogenous sign...... hiện toàn bộ
#Nonlinear systems #Aerodynamics #Linear systems #Feedback control #Sufficient conditions #Control design #Regulators #Nonlinear equations #Partial differential equations #Servomechanisms
A novel approach to estimation of Doppler frequencies of a time-varying communication channel
Proceedings of the American Control Conference - Tập 4 - Trang 3213-3218 vol.4 - 2002
T. Klaput, M. Niediwiecki
A new approach to estimation of characteristic frequencies (Doppler shifts) of periodically varying telecommunication channels is proposed. The cycles are estimated by means of performing parametric spectral analysis of the short-memory sliding window least squares estimates of channel coefficients obtained for the known, training part of the transmitted sequence. The new method offers better resu...... hiện toàn bộ
#Frequency estimation #Communication channels #Least squares approximation #Doppler shift #Distortion #Delay effects #Intersymbol interference #Mobile communication #Recursive estimation #Computer science
Modeling and control for PEM fuel cell stack system
Proceedings of the American Control Conference - Tập 4 - Trang 3117-3122 vol.4 - 2002
J.T. Pukrushpan, A.G. Stefanopoulou, Huei Peng
A nonlinear fuel cell system dynamic model that is suitable for control study is presented. The transient phenomena captured in the model include the flow characteristics and inertia dynamics of the compressor, the manifold filling dynamics, and consequently, the reactant partial pressures. Characterization of the fuel cell polarization curves based on time varying current, partial oxygen and hydr...... hiện toàn bộ
#Fuel cells #Nonlinear dynamical systems #Nonlinear control systems #Power system modeling #Filling #Polarization #Hydrogen #Temperature #Biomembranes #Analytical models
Neural networks-based sensor validation for the flight control system of a B777 research model
Proceedings of the American Control Conference - Tập 1 - Trang 412-417 vol.1
G. Campa, M.L. Fravolini, M. Napolitano, B. Seanor
Shows the results of the analysis of a scheme for sensor failure, detection, identification and accommodation (SFDIA) using experimental flight data of a research aircraft model. Conventional approaches to the problem are based on observers and Kalman filters while more recent methods are based on neural approximators. The work described in the paper is based on the use of neural networks (NNs) as...... hiện toàn bộ
#Neural networks #Sensor systems #Aerospace control #Redundancy #Aircraft #Resource management #Fault tolerant systems #Fault detection #Mechanical sensors #Aerospace engineering
A source coding and modulation method for power saving and interference reduction in DS-CDMA sensor network systems
Proceedings of the American Control Conference - Tập 4 - Trang 3003-3008 vol.4 - 2002
Chun-Hung Liu, H.H. Asada
A source coding and modulation technique for reducing multiple access interference (MAI) as well as for reducing power consumption in DS-CDMA wireless sensor network systems is presented. Source symbols are represented by a special coding, termed minimum energy coding (ME coding), which exploits redundant bits for saving power when transmitted via RF links with on-off-keying. Since energy is consu...... hiện toàn bộ
#Source coding #Modulation coding #Multiaccess communication #Sensor systems #Multiple access interference #Radio frequency #Energy consumption #Wireless sensor networks #Signal to noise ratio #Error probability
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