Linear Observer
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. The Control of Asymmetric Rolling Missiles Based on Improved Trajectory Linearization Control Method
ABSTRACT According to motion characteristic of an asymmetric rolling missile with damage fin, a three-channel controlled model is established. The controller which is used to realize non-linear tracking and decoupling control of the roll and angle motion is introduced based on an improved trajectory linearization control method. The improved method is compos
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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2. Vertical bone measurements from cone beam computed tomography images using different software packages
This article aimed at comparing the accuracy of linear measurement tools of different commercial software packages. Eight fully edentulous dry mandibles were selected for this study. Incisor, canine, premolar, first molar and second molar regions were selected. Cone beam computed tomography (CBCT) images were obtained with i-CAT Next Generation. Linear bone
Braz. oral res.. Publicado em: 11/02/2015
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3. Three theories for reconciling the linearity of egocentric distance perception with distortion of shape on the ground plane
The focus here is on the paradoxical finding that whereas visually perceived egocentric distance is proportional to physical distance out to at least 20 m under full-cue viewing, there are large distortions of shape within the same range, reflecting a large anisotropy of depth and frontal extents on the ground plane. Three theories of visual space perception
Psychol. Neurosci.. Publicado em: 2014-12
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4. Reliability of measurements on virtual models obtained from scanning of impressions and conventional plaster models
Aim: To evaluate the reliability of linear measurements in virtual models by comparing measurements performed on virtual models obtained from alginate impression scans, plaster model and measurements performed on conventional plaster model. Methods: The sample comprised 26 randomly selected patients to have impressions of their upper and lower jaws taken usi
Braz. J. Oral Sci.. Publicado em: 2014-12
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5. Multi-model MPC with output feedback
In this work, a new formulation is presented for the model predictive control (MPC) of a process system that is represented by a finite set of models, each one corresponding to a different operating point. The general case is considered of systems with stable and integrating outputs in closed-loop with output feedback. For this purpose, the controller is bas
Braz. J. Chem. Eng.. Publicado em: 2014-03
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6. Differences between uni-and multidimensional scales for assessing pain in term newborn infants at the bedside
OBJECTIVES: This study sought to determine the level of agreement between behavioral and multidimensional pain assessment scales in term newborn infants submitted to an acute nociceptive stimulus. METHODS: This cross-sectional study was performed on 400 healthy term newborns who received an intramuscular injection of vitamin K during the first 6 hours of lif
Clinics. Publicado em: 2012-10
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7. System identification and active vibration control of a flexible structure
The aim of this paper is to illustrate the active control of vibration of a flexible structure using a model-based digital controller. The state-space model of the system is derived using a system identification technique known as the Observer/Kalman Filter Identification (OKID) method together with Eigensystem Realization Algorithm (ERA). Based on the measu
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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8. A new block algorithm for full-rank solution of the Sylvester-observer equation
A new block algorithm for computing a full rank solution of the Sylvester-observer equation arising in state estimation is proposed. The major computational kernels of this algorithm are: 1) solutions of standard Sylvester equations, in each case of which one of the matrices is of much smaller order than that of the system matrix and (furthermore, this small
Publicado em: 2011
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9. Design of a passive nonlinear observer and a backstepping controller for surface vessels. / Projeto de um observador passivo não-linear e de um controlador backstepping para navios de superfície.
Dynamic Positioning Systems (DPS) are control systems used to maintain the vessel on a desired position or pre-defined path exclusively by means of active thrusters. A DPS can be separated into a set of dedicated modules with designated tasks. The most significant modules are the position and heading measurement systems, the state estimator, the controller a
Publicado em: 2010
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10. Contribution to drive the resonant linear compressor without displacement sensor / Contribuições para o acionamento do compressor linear ressonante sem sensor de posição
Nos compressores lineares ressonantes o pistão é acionado por um atuador linear e molas diretamente no sentido do seu movimento alternativo, formando um sistema massa-mola ressonante, eliminando assim os mancais mecânicos e o sistema biela e manivela dos compressores convencionais, reduzindo de forma significativa as perdas por atrito. A amplitude do desl
Publicado em: 2010
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11. Utilização dos métodos SDRE e filtro de Kalman para o controle de atitude de simuladores de satélites / Application of SDRE and Kalman filter methods to attitude control of satellite simulators.
Space missions involving automatic procedures for big attitude maneuvers and control using new non-linear control techniques require from the satellite Attitude Control System (ACS) reliability, adequate performance and robustness. In that context, experimental validation of new equipment and/or non-linear control techniques through prototypes is the way to
Publicado em: 2009
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12. Subspace predictive control. / Controle preditivo com enfoque em subespaços.
Model Predictive Control (MPC) technology is widely used in chemical process industries. Subspace identification (SID) on the other hand has proven to be an efficient alternative for classical system identification methods. Based on the results from MPC and SID, it was developed in the late 90s a new control approach, called Subspace Predictive Control (SPC)
Publicado em: 2009