117 research outputs found
Optimization of Distribution System Reliability
Reliability analysis of distribution systems has been attracting increasing attention. A special concern pertains to the distribution networks on which most failures occurs. The optimization of distribution system of breakers and power switches is a possible strategy to improve reliability. The paper describes development procedure for modelling restoring after a fault and calculating associated reliability indices and customersā outage costs. The developed model of the network and reliability and outage costs calculating algorithm is suitable for multi-criteria analysis of the network. Proposed reliability and outage costs calculation algorithm is based on Monte Carlo simulation and genetic algorithm
Climate Parameters Optimization Using Intelligent Control with Multiple Criteria Decision Making
The main idea of this paper is to use multi criteria decision making and intelligent agent negotiation algorithms to create an algorithm and coordination mechanism for climate parameters control to save electrical energy and keeping high comfort level in the object. Interest is concentrated on the climate parameters optimization in public electric transportation vehicle passengersā interior. The article presents mathematical problem using intelligent agents in mechatronic problems for climate parameters optimal control. The methods of the problem solving and structure of problem solving algorithm are given in the article. There are main conclusions in the article
Modeling of Fuzzy Logic Controller Support for Passengers' Interior Heating System of Electric Transport
GalvenÄ raksta ideja ir izplÅ«duÅ”Äs loÄ£ikas kontroliera un inteliÄ£ento aÄ£entu izmantoÅ”ana, lai izveidotu algoritmu un koordinÄcijas mehÄnismu klimata parametru kontrolei, ar mÄrÄ·i ietaupÄ«t elektroenerÄ£iju un uzturÄt augstu komforta lÄ«meni objektÄ. Interese ir koncentrÄta uz klimata parametru optimizÄciju sabiedriskÄ elektrotransporta lÄ«dzekļu pasažieru salonÄ. Å is raksts apraksta matemÄtisko problÄmu, izmantojot izplÅ«duÅ”Äs loÄ£ikas kontrolieri, mehatroniskajÄs sistÄmÄs klimata parametru optimÄlai kontrolei. RakstÄ ir dotas problÄmas risinÄÅ”anas metodes un problÄmas risinÄÅ”anas algoritma struktÅ«ra. ÄŖpaÅ”a uzmanÄ«ba ir veltÄ«ta intelektuÄlo apkures, ventilÄcijas un gaisa kondicionÄÅ”anas sistÄmu izpÄtei un tÄlÄkai attÄ«stÄ«bai, kas dotu iespÄju daudz elastÄ«gÄk regulÄt sistÄmas kompresora, ventilatora un sildÄ«tÄja darbÄ«bu un tÄdejÄdi uzlabot efektivitÄti un taupÄ«t enerÄ£iju. RakstÄ ir aprakstÄ«ts izstrÄdÄtais vadÄ«bas sistÄmas datormodelis ar izplÅ«duÅ”Äs loÄ£ikas kontroliera atbalstu. IzstrÄdÄtais kontroles sistÄmas modelis var tikt izmantots mikroklimata uzturÄÅ”anai dažÄdÄs telpÄs, ÄkÄs un sabiedriskajÄ elektrotransportÄ. Raksta beigÄs ir sniegti galvenie secinÄjumi
Algorithm of Energy Efficiency Improvement for Intelligent Devices in Railway Transport
The present paper deals with the use of systems and devices with artificial intelligence in the motor vehicle driving. The main objective of transport operations is a transportation planning with minimum energy consumption. There are various methods for energy saving, and the paper discusses one of them ā proper planning of transport operations. To gain proper planning it is necessary to involve the system and devices with artificial intelligence. They will display possible developments in the choice of one or another transport plan. Consequently, it can be supposed how much the plan is effective against the spent energy. The intelligent device considered in this paper consists of an algorithm, a database, and the internet for the connection to other intelligent devices. The main task of the target function is to minimize the total downtime at intermediate stations. A specific unique PHP-based computer model was created. It uses the MySQL database for simulation data storage and processing. Conclusions based on the experiments were made. The experiments showed that after optimization, a train can pass intermediate stations without making multiple stops breaking and accelerating, which leads to decreased energy consumption
Multiple Criteria Decision Support for Heating Systems in City Electro Transport
In this paper provision of optimal level of climate parameters in passengersā interior of public electro transportation by providing minimal electro energy consumption is looked over as the task of control optimization of mechatronic system. This task can be realized using artificial intellect and progressive multiple criteria decision making methods.
Popular Nelder-Mead multiple criteria decision making method will be applied in the article which gives a possibility to search for minimal value of some target function. In this case it is minimal electro energy consumption dependence on maximal comfort level
Usage of Multilayer Perceptron Type Neural Network in Control of Electric Train Passengersā Interior Heating System
The main idea of this paper is to use Multilayer Perceptron type artificial neural network and intelligent program agents to create an algorithm and coordination mechanism for climate parameters control to save electrical energy and keep high comfort level in the object. Interest is concentrated on the climate parameters optimization in passengersā interior of public electric transportation vehicles.
The article presents mathematical problem using intelligent agents in mechatronics problems for climate parameters optimal control. The methods of the problem solving and structure of problem solving algorithm are given in the article
Modelling of Evolutionary Algorithms for Intelligent Electric
PÄtÄ«juma mÄrÄ·is ir izstrÄdÄt jaunus matemÄtiskos modeļus un jaunus algoritmus intelektuÄlÄm iekÄrtÄm, lai vadÄ«tu elektro transporta sistÄmu, Åemot vÄrÄ pilsÄtas transporta sistÄmas dinamiku. Modeļi un algoritmi tiek piedÄvÄti daudzkritÄriju optimizÄcijai.
PÄtÄ«juma galvenais mÄrÄ·is ir samazinÄt pilsÄtas elektriskÄ transporta elektroenerÄ£ijas patÄriÅu. MatemÄtiskais modelis un evolÅ«cijas algoritms tiek piedÄvÄts, lai atrisinÄtu daudzkritÄriju optimizÄcijas uzdevumu elektroenerÄ£ijas patÄriÅa un stÄvÄÅ”anas laika samazinÄÅ”anai un vidÄjÄ transporta plÅ«smas kustÄ«bas Ätruma palielinÄÅ”anai satiksmes sastrÄgumos.
SabiedriskÄ elektrotransporta sistÄmas matemÄtiskajÄ modelÄ« ir dinamisko parametru kopa. Visi mainÄ«gie nepÄrtraukti mainÄs. LÄ«dz ar to ir jÄizmanto evolÅ«cijas algoritms, lai adaptÄtu optimÄlo risinÄjumu aktuÄlo dinamisko parametru vÄrtÄ«bÄm. EvolÅ«cijas algoritmu ar dinamiskajiem parametriem var izmantot, lai sinhronizÄtu luskaforus savÄ starpÄ, ar transporta plÅ«smu un ar sabiedriskÄ transporta sarakstu, tÄ izvairoties no dÄ«kstÄves, direktÄ«vo termiÅu pÄrkÄpumiem un piedÄvÄjot labÄku servisu pasažieriem.
RakstÄ tiek apskatÄ«ts arÄ« praktiskais piemÄrs, lai pÄrbaudÄ«tu piedÄvÄto modeli un evolÅ«cijas algoritma efektivitÄti
Multiple Criteria Decision Support for Heating Systems in Electric Transport
In this paper the solution of task of optimal control of climate parameters in passengersā interior of public electric transport is proposed. Optimization of mechatronic system control is provided by criteria of minimization of electric en-ergy consumption and passengersā comfort level maximization. It is proposed to solve this task using artificial intelligence and progressive multiple criteria deci-sion making methods. Popular Nelder-Mead multiple criteria decision making method is applied. This method gives possibility to find a minimal value of target function. In this case it is a dependence of minimal electric energy consumption on maximal comfort level. Modelling and investigation is based on a typical archi-tecture of heating ventilation and air conditioning system with a traditional appli-cation of AC induction motors for driving both a compressor and a fan of the con-ditioner. Special interest for investigations and further development is devoted to intelligent heating systems allowing more flexible regulation of the systemās com-pressor and fan operation, and, therefore, improvement of efficiency and energy saving
ElektriskÄ sliežu transporta iebÅ«vÄto bezvadu bremzÄÅ”anas iekÄrtas vadÄ«bas algoritmu izstrÄde
Vilcienu kustÄ«bas droŔības nodroÅ”inÄÅ”anas sistÄmas uzdevums ir bÄ«stamu situÄciju nepieļauÅ”ana vadÄ«tÄja kļūdu vai vilciena vadÄ«bas sistÄmas atteices dÄļ. Vispirms par bÄ«stamo situÄciju var uzskatÄ«t braukÅ”anu uz luksofora aizliegÅ”anÄs signÄlu un maksimÄli pieļaujama Ätruma pÄrkÄpÅ”anu. TÄdai sistÄmai ir jÄstrÄdÄ nekaitÄ«gi pat arÄ« tÄdÄ gadÄ«jumÄ, ja tai paÅ”ai ir atteice. SistÄma arÄ« var nozÄ«mÄ«gi vienkÄrÅ”ot vadÄ«tÄja darbu un atļauj vadÄ«t vilcienu, pamatojoties ne viss uz maŔīnista tekoÅ”Äs situÄcijas subjektÄ«vas novÄrtÄÅ”anas, bet uz precÄ«zo lÄmumu izvÄli konkrÄtiem apstÄkļiem.
AutomÄtika, ko izmanto dzelzceļa transportÄ, nodroÅ”ina vilcienu kustÄ«bas droŔību. TomÄr pÄdÄjos gados uz Latvijas un pasaules dzelzceļiem ir notikuÅ”as vairÄkas lielas katastrofas, kas izraisÄ«juÅ”as nelaimes gadÄ«jumus un radÄ«juÅ”as nozÄ«mÄ«gus materiÄlos zaudÄjumus.
CÄloÅus vilcienu braukÅ”anai garÄm aizliedzoÅ”am signÄlam un citu uz vilcienu vadÄ«Å”anu vÄrsto noteikumu neievÄroÅ”anai var iedalÄ«t Å”Ädi:
ModrÄ«bas zaudÄjums no komandas maŔīnistu puses..........................................30%
MaŔīnistu brigÄdes miegs ..................................................................................15%
Kļūdaina signÄlu novÄrtÄÅ”ana........ ....................................................................13%
NovÄlota bremzÄÅ”anas sistÄmu ieslÄgÅ”ana vai to nepareiza vadÄ«ba............... . 12%
IzbraukÅ”ana no nekodÄta ceļa........................................................................... 10%
BraukÅ”ana ar bojÄtÄm automÄtikas ierÄ«cÄm vai atslÄdzot tÄs..............................9%
BrigÄdes nespÄja vadÄ«t vilcienu............................................................................6%
Bremžu efektivitÄtes trÅ«kums..............................................................................5%
AnalizÄjot datus, var secinÄt, ka 70% gadÄ«jumu aizlieguma signÄlu neievÄroÅ”ana rodas, ja tehniskie lÄ«dzekļi atrodas tehniskÄ kÄrtÄ«bÄ, bet kļūdas savÄ darbÄ«bÄ pieļauj maŔīnistu brigÄdes. Citiem vÄrdiem sakot, Å”Ädos gadÄ«jumos izŔķiroÅ”o lomu spÄlÄ cilvÄka faktors.
Bremžu sistÄmas uz vilcieniem atļauj bremzÄÅ”anu no maksimÄlÄ Ätruma, lai pilnÄ«gi apturÄtu vai samazinÄtu Ätrumu lÄ«dz nepiecieÅ”amam minimumam, bet bremzÄÅ”anas ceļŔ var bÅ«t vairÄki tÅ«kstoÅ”i metru. Bez tam, bremzÄÅ”anas ceļa garumu var ietekmÄt dažÄdi faktori, kas var tikai pasliktinÄt situÄciju.
Ne mazÄku lomu spÄlÄ jau minÄtais cilvÄka faktors, kad ierobežotas maŔīnistu iespÄjas neļauj vizuÄli pÄrraudzÄ«t situÄciju uz ceļiem dažu tÅ«kstoÅ”u metru attÄlumÄ, kÄ arÄ« nepamatotu zaudÄjumu laikÄ, pÄrkÄpjot braukÅ”anas grafiku un radot bÄ«stamas situÄcijas.
TieÅ”i kustÄ«bas grafika neievÄroÅ”ana tika atzÄ«ta par vienu no galvenajiem iemesliem katastrofai, kas notika pie CentrÄlÄs dzelzceļa stacijas RÄ«gÄ, kad elektrovilciens ieradÄs stacijÄ un sadÅ«rÄs ar pasažieru vilcienu, kas izbrauca uz depo.
Lai paaugstinÄtu satiksmes droŔību, ir nepiecieÅ”amas intelektuÄlas automÄtiskas ierÄ«ces, kuras veiks pastÄvÄ«gu vilcienu Ätruma un ceļa kontroli, lai noteiktu, kur un kad nepiecieÅ”ams pÄriet bremzÄÅ”anas režīmÄ, tÄ intensitÄti un, vÄl vairÄk, to vietu ceļÄ, kur vilcienam jÄapstÄjas, lai garantÄti izvairÄ«tos no avÄrijas, sadursmes vai citÄda nelaimes gadÄ«juma
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