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Electromagnetic force can seriously damage end windings of large generators, especially involute part of the end windings. This paper focuses on a 1550 MW nuclear generator. 3D time-step finite element method is used to calculate the electromagnetic forces on involute part at both rated and leading phase operation. The most vulnerable parts are pointed out, forces on these parts are analyzed in detail...
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original...
Over 90% of digital data transmitted are carried by optical fibres, to form the great part of the national and international communication infrastructure. Currently, Erbium-doped fibre amplifiers (EDFAs) and Raman amplifiers are the two most considered amplification schemes and have extended the usable fibre communication bandwidths to ∼5 THz and ∼10–15 THz, respectively. In this work, the achievable...
The paper has achieved a more efficient narrow-band filter for multi-notch ultra-wideband antenna in the case of international spectrum resource constraints. The paper is improving to the original design multi-notch ultra-wideband antenna. The way of coplanar-waveguide (CPW) coupled-fed have achieved band widening. The antenna has a large bandwidth covering the frequency band from 2.4GHz∼15.1GHz with...
With the ever-increasing requirements in industrial manufacturing as well as in the daily life activities of modern society, the control systems equipped with two or more parallel PWM rectifiers rather than solely with a PWM rectifier are widely used to meet the system demands of higher productivity, reliability and safety. Although the control result of the system using conventional PI controller...
With the increasing amount of car equipped with collision avoidance radar, the mutual interference is becoming a problem when the cars run in the roads. The mutual interference cancellation techniques are getting more and more important to preserve the reliability of the automotive radar. Considering conventional radar with frequency agile, this paper proposes a new signal design method for automotive...
Current distribution network fault location system has a weak fault tolerance. When the information uploaded by FTU is wrong, the misjudgment will often appear. The ant colony algorithm has strong robustness, and it can solve the combinatorial optimization problems better, like distribution network fault location. This paper proposes a fault location method of error correction based on ant colony...
On-load voltage regulation transformer is one of the effective measures to control the low voltage problem in distribution network. Traditional mechanical load switches have exposed many shortcomings in the continuous development of the power system. This paper proposes a structure of load switch based on the high power IGBT, and shows its hardware circuit design of the execution structure. The scheme...
The electronic organ uses the STC89C52 microcontroller as the main control chip. It uses the 4 ∗ 4 keyboard circuit mode to choose tones and tone value is displayed pitch by the common cathode LED digital tube display. It can use the independent key to play or pause music. The simple electronic organ has 16 tone and can play songs. The paper describes the generation principle of the tone and the style...
In order to improve the stability of household distributed PV system and reduce the reverse power flow of low voltage, the paper proposes a kind of household micro-grid electric power consumption method based on energy efficiency management, studies the transferable and adjustment potentials of household transferable loads and temperature-controlled loads, especially analyzes the distributed PV consumption...
In this paper, we design an INS/GPS integrated navigation system based on federal Kalman filter for autonomous flight of multi-rotor which contains several parallel subfilter and guarantee the stability of system. At the same time, we present a discrete path generation algorithm for the multi-rotor trajectory tracking. During the autonomous landing stage, on-board computer runs a real-time land-marker...
Object recognition the is an important step for the high-level visions processing tasks, such as security managing, and abnormality event analysis. In this paper, we address these challenges of abnormal water surface monitoring in real-world unconstrained environments where the background is complex and dynamic. In the algorithm proposed, firstly we extract the Gaussian-Hermite moment features of...
Electric power quality has become an important part of power systems and electric machinery, so the research on harmonic reduction and enhancement of Power Factor (PF) has become intensified. In this paper, a comparison between passive Power Factor Corrector (PFC) traditionally used in the power systems and an active PFC type based on buck boost conversion is drawn according to harmonic distortion...
For modern high performance fighter with a fly-by-wire control system, pitch rate signal is the key feedback for proper damp characteristic of pitch movement. Once the signal sensor of pitch rate fail, the longitudinal dynamic characteristics of closed-loop aircraft will be obviously deteriorated, even become unstable. So it is necessary to study on the signal reconstruction method in case of failure...
Switched Reluctance Machine (SRM) has magnetic field with strong saturation nonlinearity features, complex mathematical models and its fault output is mainly unsteady signals of strong coupling multi-physical field, which easily floods effective fault characteristics and make it difficult to extract. In this paper, Hilbert-Huang transform (HHT) is introduced to SRM fault feature extraction method...
In this paper, a new fractional-order chaotic synchronization with unknown parameters called generalized projective lag synchronization is proposed. The method of synchronization is a generalization of projective synchronization and projective lag synchronization. According to the stability theorem of linear fractional order systems, a suitable nonlinear fractional order controller is designed for...
Robustness analysis method is proposed for rotorcraft pilot coupling with helicopter flight control system in loop. Combining with the lateral identification model of BO-105 helicopter, McRuer's pilot model, and the designed stability augmentation system, frequency domain model is established for rotorcraft pilot coupling analysis. μ analysis method and performance specifications in ADS-33E are adopted...
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