Results 261 to 270 of about 853,099 (338)

3D orientation vector estimation for subcomponents of space object imagery

SPIE Proceedings, 1997
We describe a model-based image analysis system which automatically estimates the 3D orientation vector of satellites and their sub-components by analyzing images obtained from a ground-based optical surveillance system. We adopt a two-step approach: pose estimates are derived from comparisons with a model database; pose refinements are derived from ...
Xia Du, Stanley C. Ahalt, Bruce E. Stribling   +2 more
semanticscholar   +3 more sources

Orientation Estimation by Error-State Extended Kalman Filter in Quaternion vector space

SICE Annual Conference 2007, 2007
This paper presents an error-state extended Kalman filter with data fusion for orientation estimation. The rotation parameterization is described by quaternion representation. A MARG (magnetic, angular rate, gravity) sensor is used for measurement system.
Mohammad Bagher Ahmadi, Alireza Khayatian, Paknush Karimaghaee   +2 more
semanticscholar   +3 more sources

The space vector control for induction motors based on stator flux orientation

2011 6th IEEE Conference on Industrial Electronics and Applications, 2011
Accuracy of flux amplitude and phase is critical to field-oriented control [1]. The estimation of rotor flux is easily affected by rotor time constant and compensation terms are difficult to realize. In this paper, a method based on stator flux oriented is proposed. The stator flux is estimated by integrating motor EMF. The phase voltage reconstruction
Yongkui Man, Xuehai Chen
openalex   +2 more sources

Implementation of sensorless IPMSM drive using the stator current space vector orientation reference frame

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2016
Purpose In this paper an adaptive nonlinear control scheme has been proposed for direct torque and flux control of interior permanent magnet synchronous motor (IPMSM) without using mechanical sensor. Design/methodology/approach In this control method the stator ...
Abbas Najjar-Khodabakhsh, Jafar Soltani
openalex   +2 more sources

The research on space vector control of induction motor system based on rotor field orientation

2011 Chinese Control and Decision Conference (CCDC), 2011
In this paper, the mathematical model of induction motor based on rotor field orientation in synchronous frame is introduced. Based on this, the decoupling of stator voltage is implemented using the feed forward decoupling current controller. The problem in the accuracy of flux estimation is settled using voltage model and current model flux mixing ...
Fenglong Shen, Yongkui Man, Jianhui Wang
openalex   +2 more sources

Orientation of the Angular Momentum Vector of a Space Vehicle at the End of Spin-Up

, 1985
In this paper, the angular momentum vector of a space vehicle at the end of spin-up is determined.
Spyros G. Tzafestaş
openalex   +2 more sources

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Earth orientation parameters prediction based on the hybrid SSA + LS + SVM model

Measurement science and technology, 2022
The high-precision prediction of Earth orientation parameters (EOPs) is essential for astro-geodynamics, high-precision space navigation and positioning, on-board autonomous orbits determination and deep space exploration.
Yuguo Yang, W. Nie, Tianhe Xu, Zhenlong Fang, Huijie Xue, Zhangzhen Sun   +5 more
semanticscholar   +1 more source

A stator flux oriented vector-controlled induction motor drive with space vector PWM and flux vector synthesis by neural networks

Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129), 2001
A stator flux oriented vector-controlled induction motor drive is described where the space vector PWM (SVM) and stator flux vector estimation are implemented by artificial neural networks (ANN). Artificial neural networks, when implemented by dedicated hardware ASIC chips, provide extreme simplification and fast execution for control and feedback ...
J.O. Pinto, B.K. Bose, L.E.B. da Silva
openaire   +1 more source

Predictive field-oriented control of PMSM with space vector modulation technique

Frontiers of Electrical and Electronic Engineering in China, 2009
This paper is concerned with two popular and powerful methods in electrical drive applications: field-oriented control (FOC) and space vector modulation (SVM). The proposed FOC-SVM method is incorporated with a predictive current control (PCC)-based technique.
F. Heydari, A. Sheikholeslami, K. G. Firouzjah, S. Lesan   +3 more
openaire   +1 more source

Space Vector Modulation based Field Oriented Control scheme for Brushless DC motors

2011 International Conference on Emerging Trends in Electrical and Computer Technology, 2011
This paper focuses on various aspects of Space Vector Modulation based Field Oriented Control of Trapezoidal Permanent Magnet Synchronous Motors. The purpose is to introduce in a concise manner the fundamental theory, main results and practical applications of Field Oriented Control (FOC) for Brushless DC motors. The primary focus is on controlling the
Joseph P John, S. Suresh Kumar, B. Jaya
openaire   +1 more source