{"title":"Some aspects of aircraft electrical component dependability","authors":"Miloš Andrle, M. Dub","doi":"10.1109/ESARS.2010.5665241","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665241","url":null,"abstract":"This paper deals with operating conditions of aircraft electrical components and shows what effect these conditions have on the dependability of particular components and systems. Two aviation incidents are described and their reasons and results are presented. The mechanical design of a difference minimal relay DMR-400 and its influence on a power electrical system of Aero L-39C Albatros aircraft and L-159A Alca aircraft is also described. The DMR-400 is used as a main contactor of the DC generator and the main DC bus.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125551985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Heising, Jie Fang, R. Bartelt, V. Staudt, A. Steimel
{"title":"Modelling of rotary converter in electrical railway traction power-systems for stability analysis","authors":"C. Heising, Jie Fang, R. Bartelt, V. Staudt, A. Steimel","doi":"10.1109/ESARS.2010.5665235","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665235","url":null,"abstract":"The central European 16.7-Hz railway grid is fed — beside by own power sources — by rotary and static converters. In context of recent low-frequency stability problems in the Scandinavia region, primary the interaction of four-quadrant line-side traction-converter control and surrounding rotary converters is a major concern. Therefore, adequate models for time-domain simulation are necessary. In this paper, a set of differential equations — representing even the transient behaviour of a rotary converter — are derived. Based on this resulting differential equations, simulations studies of the transient behaviour are presented. Furthermore, the behaviour of rotary converters with and without a damper-winding system on the three-phase side is analysed. Additionally, the three-phase machine can be simulation with anisotropic characteristics.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116740563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electric motors and drives for modern ship thruster propulsion: Design and system integration issues","authors":"D. Giulivo, G. Sulligoi, A. Tessarolo","doi":"10.1109/ESARS.2010.5665230","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665230","url":null,"abstract":"In modern ships of large size, the main propulsion system, consisting of either an internal-combustion engine or an electric drive, is assisted by auxiliary propulsion equipment composed of thruster propellers, used for low-speed, transversal, docking and station-keeping maneuvers. Thruster motors are typically induction machines, connected to the on-board grid either directly or through autotransformer or variable-frequency converters. This paper describes the main issues connected with the choice and design of thruster motors. In particular, the problems of integrating thruster motors into the on-board electric system are addressed. Moreover, the typical requirements and constraints imposed on thruster motor performance are highlighted along with the strategies adopted to fulfill them in the design and development stage.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113989126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Carminati, M. Rubagotti, R. Grassetti, G. Ferrari, M. Sampietro
{"title":"A smart embedded control unit for electro-hydraulic aircraft actuators","authors":"M. Carminati, M. Rubagotti, R. Grassetti, G. Ferrari, M. Sampietro","doi":"10.1109/ESARS.2010.5665217","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665217","url":null,"abstract":"The design and experimental characterization of a novel electronic control unit for fly-by-wire aircraft actuators are presented. Thanks to a carefully-engineered compact volume, it is embedded in the actuator body, providing local closed-loop control. Various digital control laws can be implemented in the easily reconfigurable digital platform. After system modeling and tuning, a variable-gain controller has been selected. Beyond reduction of weight (900g), power dissipation (7W) and cabling connections (required only for power supply and digital communication bus), the advantages provided by this smart unit are both in terms of performance and safety improvement. In fact, fast (1Hz) and precise (1mm resolution, 2mm accuracy, no overshoot) closed-loop linear displacement regulation is here demonstrated. Furthermore, this robust and rugged unit is endowed with self-diagnostic capabilities: fault detection of all critical electronic and electro/mechanical sections is implemented by dedicated analog circuits. It is suitable for fully-electrical and hybrid electro-hydraulic actuators. Extensive thermal characterization has confirmed the fulfillment of specifications over the whole −40°C ÷ +70°C operating range.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131602578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Kunifuji, H. Ito, Yoshinori Saiki, M. Matsumoto
{"title":"Proposal of coexistence technology of safety, reliability and flexibility in safety related real-time system and practical use to railway signalling system","authors":"T. Kunifuji, H. Ito, Yoshinori Saiki, M. Matsumoto","doi":"10.1109/ESARS.2010.5665257","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665257","url":null,"abstract":"Recently amount of construction about railway signalling system is steadily increasing to improve the transport services for the customer. But, at present efficiency of signal construction is very low. For example it is caused by that the period for the construction is limited to very short time at midnight or flexibility of the signalling system is low from its system architecture. To solve this problem we are now grappling the innovation of the railway signalling system. In this paper, coexistence technology of safety, reliability and flexibility in safety related real-time system and safety evaluation in practical system is discussed.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128942060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Robust speed-sensorless induction motor with the rotor time constant adaptation","authors":"A. Larabi, M. S. Boucherit","doi":"10.1109/ESARS.2010.5665240","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665240","url":null,"abstract":"This paper presents a new technique for online identification of an induction motor rotor time constant. The technique is designed for a shaft-sensorless indirect field-oriented control induction motor drive with a model reference adaptive system (MRAS)-based speed estimator. The MRAS estimator is sensitive to the changes in the rotor time constant, and on line identification of that parameter is essential. If rotor parameter error exists, it does not only change the achieved rotor speed, but it also changes the dynamic behavior of the whole field control and speed estimation structure. Considering this major inconvenience, a solution is obtained by estimating the rotor resistance, we use a method that computes the latter in function to flux (real, reference) and torque (Electromagnetic real, reference). The rotor speed is estimated by using the model reference adaptive system approach (MRAS). This method consists of using two models: The first is the reference model and the second is an adjustable one in which two components of the stator flux, obtained from the measurement of the currents and stator voltages are estimated. The estimated rotor speed is then obtained by canceling the difference between stator-flux of the reference model and those of the adjustable one. Satisfactory results of simulation are obtained and discussed in this paper to highlight the proposed approach.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115789729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nonlinear control of a double-electromagnet suspension system","authors":"A. Maghsoudlu, R. Barzamini, K. D. Farahani","doi":"10.1109/ESARS.2010.5665254","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665254","url":null,"abstract":"In this paper a feedback linearization is presented that addresses the coupling effects between two groups of electromagnetic trains. The module, based on some reasonable assumptions of nonlinear mathematical model, is modeled as a double-electromagnet system. The proposed algorithm in tracking has a satisfying performance in presence of unknown changes in the mass. It also shows robustness against the presence of measurement noises which is the case in the considered plant where all sensors collect noise from the environment. The simulation results show the capability of the proposed algorithm in the presence of input and output perturbation.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128558067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Basic study on a designing method of the traction equipments to save the running energy with an optimization method","authors":"Toshiyuki Moritani, K. Kondo","doi":"10.1109/ESARS.2010.5665250","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665250","url":null,"abstract":"The saving energy with train operation is more important than before from the view points of the global environment. However the energy saving design on the traction equipments sometimes has a trade off relation against the down sized and lighter weight traction equipments. In this paper, an optimizing method of the generic algorithm is applied to the numerical simulation to calculate the consuming energy, the running time, the loss of traction motors and inverters. The results show the trade off relation between the total consumed energy, the running time, the loss of traction motors and inverters. The proposed method will contribute to design efficiently the electrical traction equipments considering the energy consumption.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128280576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and protection of a high voltage DC onboard grid with integrated fuel cell system on more electric aircraft","authors":"A. Lucken, J. Brombach, D. Schulz","doi":"10.1109/ESARS.2010.5665245","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665245","url":null,"abstract":"A major demand of the aviation industry is the reduction of emissions in combination with cost efficiency improvement. One possible approach to face this challenge is the replacement of the conventional auxiliary power unit by a fuel cell system within a “more electric aircraft” design. In order to integrate a fuel cell system into the grid architecture of modern aircraft new protection arrangements have to be developed. For availability and redundancy the fuel cell system has to be split into two subsystems. Furthermore the two subsystems have to be connected in parallel to bundle the power delivery and to balance the power. This complex grid structure requires smart safety arrangements to protect the grid in case of failures. In this contribution two safety concepts for doubly fed ring structures are introduced and analyzed. The directional stepped-curve distance-time protection and the impedance protection are illustrated and simulated. Concluding the results of the two concepts are compared.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Prediction and mitigation of magnetic fields propagated from DC light rail transit systems","authors":"A. Mariscotti, A. Ogunsola","doi":"10.1109/ESARS.2010.5665253","DOIUrl":"https://doi.org/10.1109/ESARS.2010.5665253","url":null,"abstract":"Modern traction electrification systems are a source of magnetic emissions and possible interference for many internal and external equipment; this is particularly true for light rail or street car systems running through cities and in close proximity to public sensitive installations. In this paper, an analysis of the magnetic field from a light rail is presented. Furthermore potential design mitigations that can be implemented to attenuate the dc component and thus reduce the risk to third party installations are considered with the help of a case study. The average field reduction obtained is in the order of 10 dB.","PeriodicalId":134406,"journal":{"name":"Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"694 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130606640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}