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Working out of the search algorithm of failures of Air Conditioning System of TU-154

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Mi is ry of educa io a d scie ce of Ukrai e a io al Avia io U iversi yCourse work o he discipli e Diag os ics of aircraf s a e ‘Worki g ou of he search algori hm of failures of Air Co di io i g Sys em of U-154’ he work is performed by he s ude of 505 FLA D. Zhuravel he work is checked by: Y. A. SapeljukKyiv 2009 Co e 1. Work’s goal 2. Descrip io of ACS of u-154 3. Pri cipal scheme of ACS of u-154 4. heore ical base of algori hm developi g process 5. Descrip io of ob ai ed algori hm Descrip io a d opera i g pri ciples of Air-Co di io i g Sys em of u-154 he air co di io i g sys em (ACS) provides pressuriza io , ve ila io , hea i g of he pressure cabi . Air is ake from he 9 h compressor s age of hree e gi es i amou of 5000-5500 kg/h, empera ure is be wee 240 - 350 °C a d differe ial pressure is 7,5 - 9kg/sm2. he ACS supply co di io ed air o he co rol cabi , passe ger cabi , elec ro ic equipme compar me , forward cargo compar me , air co di io i g dis ribu io bay a d af cargo compar me , a d provides co s a pressure a d empera ure i pressure cabi . I is mai ai ed by air flow regula io . Air supply o he air co di io i g sys em is fur ished by he p euma ic sys em from ei her e gi e bleed air or he auxiliary power u i (APU) i fligh ; from e gi e bleed air, APU bleed air, grou d p euma ic supply car , or from a grou d co di io ed air supply car duri g grou d opera io . All cold air required for air co di io i g is provided by air co di io i g packs. Passi g bleed air hrough a primary hea excha ger, a air cycle machi e, a d a seco dary hea excha ger cools he air sufficie ly o ha dle a y cooli g si ua io required. A ram air sys em provides coola air for he hea excha gers. I each of hree pipeli es here is regula ed check valve o preve air masses flow i re ur ed direc io . Pipeli es a achme is realized wi h he help of compe sa ors. Fur her hree pipeli es are co ec ed i o si gle o e mai li e, which leads o he firs cooli g s age - prelimi ary air- o-air hea excha ger. empera ure of ho air af er AAHE is ra ged be wee 100 - 200°C. AAHE is he firs s age of cabi air cooli g mai ai ed by a mosphere ram-air flow. AAHE is o e-flow. I case of overcooli g here is by-pass li e o bleed off air besides AAHE. Before air e ers pressure cabi he mai li e is divided o wo parallel pipeli es: righ a d lef . hey lead o wo mai cooli g s ages, where AAHEs a d air cycle machi es i s alled. Here, af er AAHE air empera ure should be o more ha 60°C, behi d ACM - 10 - 20°C. I case of overcooli g here are wo by-pass li es besides AAHE a d ACM. By-pass of air is carried by air dis ribu ers mou ed o AAHE. Regula io of dis ribu ers is au oma ic or ma ual. ACM has wo fu c io s: o cool air flowi g from AAHE bei g seco dary s age of air cooli g; o suck scave ged air hrough AAHE duri g ACS opera io bei g o he grou d. here is also oil sys em of ACM. I `s fu c io is o lubrica e ACM beari gs. he air comes o dis ribu ive mai li e where air mix ures a d air dis ribu ers are loca ed. Air mix ure is used o mix cold a d ho air. Air dis ribu ors of ho a d cold air are used o regula e defi i e empera ure of air i pressure cabi .

oise suppressio device. heore ical basis of worki g ou of algori hmFor algori hm worki g ou le ’s use he me hod ha is based o he heory of i forma io . I i he leadi g fu c io is i forma io qua i y, which ca be go duri g co rol of diag os ic parame er or maki g a o her check. By he resul s of he check we defi e diag ose of he sys em. Prac ically, he process of he algori hm worki g ou begi s from he co s ruc io of he able of fu c io al failures a d calcula io of i forma io qua i y, go duri g every check, a d he he algori hm of failures searchi g is formed. Duri g his here are co sidered cer ai fu c io al sys em of he aircraf , s ruc ure of i s aggrega es a d pri ciple of heir work, a d also parame ers, which charac erize sys em workabili y a d sig s of failures a d defec s appeara ce. Aggrega es, which are i cluded o he sys em, i he process of opera io fail. Failures happe for differe reaso s, amo g which he mos wide-spread are wear a d failure of he aggrega e’s eleme s, shri k of he spri gs, loose of pressuriza io , jammi g of slide valves, fil er cloggi g e c. Cer ai ype of he aggrega e failure is co sidered as i s diag ose Di, which is followed by cer ai sig s (parame ers) Xi, which become evide i opera io a d are fixed duri g use of he sys em by he assig me or duri g maki g of mai e a ce. Fu c io s of he failures are made for hydraulic sys em of re rac io -ex e sio of la di g gear of he aircraf , able 1.Fu c io s of he sys em failures. able 1 Compo e ame Diag osis (Di) Malfu c io fea ures (Xj) umber of diag osis appeara ce ( ) Probabili y of diag osis appeara ce (Qi) X1 X2 X3 X4 X5 AAHE D1 4 0.25 D2 5 0.31 ACM D3 3 0. 19 SD D4 1 0.06 Pipeli es D5 2 0.13 Check valve D6 1 0.06 2 2 2 1 1 D1 D2 D12 D1 D5 D 15 D3 D4 D36 D6 D5 Abbrevia io s a d refere ce desig a io : Diag oses: D1 - i correc ubes` i s alla io D2 - o -pressurized i er al cavi y D3 - weake ed fi i g D4 - damage of a housi g D5 - o -pressurized par of li e D6 - wro g i s alla io - umber of diag oses ha are co rolled by his sig - diag oses, which are co rolled Sig s of failures: X1 - raised empera ure i pipeli e X2 - u sa isfac ory pressuriza io of righ mai li e X3 - u usual oise i he cabi X4 - o air supply o ACS X5 - fumes i passe ger cabi Evalua io of probabili y of diag oses appeara ce is calcula ed by he formula:, , (1)where i - umber of cases of appeara ce of і diag ose; - umber of all diag oses of sys em aggrega es. I he able 1 here are wri e aggrega es’ ames, heir possible diag oses, a d heir sig s. If some sig from he o ali y Xj correspo ds o diag ose Di o he crossi g of heir colum s we pu he sig ( ), ha shows s ochas ic rela io be wee hem. Prese ce of rela io s be wee diag oses a d sig s is defi ed by he maki g of e gi eeri g a alysis of work of he sys em a d i s aggrega es wi h aki g i o accou possibili ies of sys em co rol, which is used o he give ype of aircraf . Diag oses are chose by s a is ic da a ha are collec ed o opera io al e erprises i he process of opera io of avia io ech ique. For fu c io al sys ems of he aircraf i is ypical he appeara ce simul a eously several sig s duri g failures appeara ce, ha is u derli ed prese ce of several sig s ( ) i he colum s of he able 1.

Da a a alysis a es s ha some sig s may be show i appeara ce of differe failures a d defec s of aggrega es, ha ’s why i pe ul ima e li e here are wri e umber of diag oses, which are co rolled by each sig . If some sig is show i appeara ce of several diag oses, he i s appeara ce may be caused by appeara ce of ei her o e diag ose or a o her o e, a d also whe diag oses appear oge her. ha ’s why i he las li e of he able here are wri e possible combi a io s of he diag oses. I spi e of ha duri g a alysis of fu c io al sys ems of he aircraf i is co sidered ha simul a eous appeara ce of several ypes of he failures of aggrega es, bu from heore ical poi of view accou i g u cer ai y of i forma io abou he s a e of aggrega es, i he case of appeara ce of such si ua io i is ecessary o ake i o accou his possibili y. For usage of ma hema ical appara us of heory of i forma io i is ecessary o defi e values of probabili ies qi of appeara ce of his or ha diag ose. For heir calcula io i pe ul ima e colum of he able here are wri e umber of cases of appeara ce of each diag ose by s a is ical da a, which are collec ed for some period of A opera io . I is evide ha i is o possible o calcula e probabili y of diag ose appeara ce, bu i is possible o ge heir evalua io . Co rol of o e or several parame ers (sig s) of he sys em, which is called check, gives i forma io j abou prese ce of aggrega e diag ose. Qua i y of i forma io , accou i g ha we co sider dicho omy, is evalua ed as differe ce be wee level of sys em s a e u cer ai y before H (S) a d af er check H (S/ j):J= H (S) - H (S/ j). (2)Level of u cer ai y of sys em s a es before he check i co di io ha sys em ca be u workable as a resul of appeara ce of o ly o e a y diag ose from heir ge eral qua i y wi h probabili y qk is calcula ed by he formula: (3) Level of u cer ai y of sys em s a es af er he check: (4)Where - o al probabili y of appeara ce of m diag oses, which are e veloped by he check i; q - probabili y of appeara ce of diag ose from o ali y m, e veloped by he check i. he (5)Se i g of he diag ose i he sys em should be begu from he check i, which carries he grea es qua i y of i forma io . As a resul of maki g of he check able 1 is ra sformed. We will wo ables as a resul of his. If i he firs check i is fixed ha sig was co firmed (such si ua io is sig ed as R = 1), diag oses should be looki g for i ha o ali y, wi h which his sig has s ochas ic rela io . Seco d s ep for refi eme of diag ose is made wi h he help of ra sformed able, which i cludes m diag oses. As i he previous case se i g of diag ose will be made wi h aki g i o accou qua i y of i forma io , go duri g seco d check. Qua i y of i forma io i his case is calcula ed by he formula: (6)If R = 0, ha mea s sig is o co firmed, he search of diag ose is made by a o her ra sformed able, which i cludes diag oses from he umber m 1 . i such case qua i y of i forma io is calcula ed by formula: (7)For usage of expressio s (1) - (7) i is made able of calcula ed-i forma io al da a ( able 2). able of calcula ed-i forma io al da a. able 2 № Parame ers a d fea ures Sys em compo e s diag oses Sq I D1 D2 D3 D4 D5 D6 1 X1 0.2

Brian's only twenty-five. You're eighteen, aren't you?» The girl nodded. Denise added, «How old's Pete?» «He'll be twenty-three.» «There, you see. We're almost the same age group. The four of us.» Denise eased Jennifer to her feet. She was a rather small girl herself, but she felt so much larger than this tiny beauty. She beat down an urge to sweep the teenaged darling into her arms and make love to her. She had gone that route while in high school and had decided lesbianism wasn't her bag. But there was something about this adorable little teenager with the big, baby-blue eyes that brought out the beast in her. Small wonder guys flipped for this kid. «Shall we go down to the basement and join our horny bastards?» She referred to the rumpus room she and Brian had fixed up in the basement. A large, air conditioned room designed for fun and games, with a built-in bar, two day bed couches, a pool table, a dart board and hi-fl and television set. An ideal spot for what they all had in mind. All, that is, apparently, except Jennifer

1. Algorithmic recognition of the Verb

2. The life and work of the self-employed socialist intellectual, Humphrey McQueen

3. Comparison of the Renaissance and Enlightenment (Сравнение Ренессанса и Просвещения)

4. Going public and the dividend policy of the company

5. My modern image of the United States

6. The fastest computers of the world
The fastest computers of the world
7. Представители Ренессанса (Representatives of the renaissance and thair contribution to the literature)
8. The influence of the Great Britain on our daily life
The influence of the Great Britain on our daily life

9. The Consequences of the Soviet-Afghan War

10. History of `The Beatles` and biographies of members in english

11. The Consequences of the Soviet-Afghan War

12. Geometrization of the Fundamentals of Chemistry

13. The Taming of the Shrew

14. History of the USA

15. The National Emblem of the Republic of Kazakhstan

16. Problems of the youth

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17. Discovery of the New World

18. Cities of the USA

19. The Doctrine of the "Mysterious Female" in Taoism

20. Flora and Fauna of the USA

21. Why was Washington made the capital of the United States?

22. The political system of Ukraine
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23. Art of the Edo Period
Art of the Edo Period
24. Category of number of the noun
Category of number of the noun

25. Historical Background of the Middle English Period

26. Lexicology of the English Language

27. Survival of the Welsh Language

28. The system of english tenses

29. Word-formation of the English language. Conversion

30. Survey of the British Geography and Life

31. Henry Wadsworth Longfellow: Most Popular Poet of the Nineteenth Century

32. Problems of the youth (friendship, love, conflicts)

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33. Some problems of the russian spelling

34. American Literature: An Overview Of The Development From The 17th To The 20th Centu-ries

35. Valley of the Kings

36. Establishment of the Federal judicial system

37. The development of the drama. The theatres and actors

38. Famous journalist of the English-speaking country. Benjamin Franklin
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39. Relief of the UK
Relief of the UK
40. Why the crystal structure of the element is such lattice but not another?
Why the crystal structure of the element is such lattice but not another?

41. The notion of the agreement of the purchase and sale According to art

42. Islam in the eyes of the West

43. The political method of the International Socialist Organisation

44. Rise of sociology as an intellectual tradition. Classical tradition in sociology of the XIX century

45. Acquaintance with geometry as one of the main goals of teaching mathematics to preschool children

46. Comparative Analysis of the Compound Words

47. Economy of the United States

48. Industrial development of the African countries

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49. Role of the interpreter in the modern world

50. Sport in different countries of the world

51. Stylistic Classification of the English Vocabulary

52. The explaining of the meaning of neologism

53. The history of grammatical study of the English language

54. The origin and history of the English language
The origin and history of the English language
55. The outline of the period
The outline of the period
56. The problems of the Subjunctive Mood in English
The problems of the Subjunctive Mood in English

57. The Socialist-Revolutionaries and the labor movement (the beginning of the twentieth century)

58. The theoretical basis for the international trade. The modern trends of the international trade development

59. Historical measurement of the science of governing

60. Division of the sentence into phrases

61. Intellectual history of the Europe

62. The impact of the French Revolution on the European system

63. The Tax System of the United States

64. Political System of Britain

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65. American System of Education

66. The Algorithm of a Start and the Development of International Conflicts and Possible Ways of Their Solution

67. The improvement of work on the rhythm in the classes of english on the materials of limericks

68. The effect of light intensity on the amount of chlorophyll in “Cicer arietinum”

69. The Economy of Great Britain

70. The United Kingdom of Great Britain and Northern Ireland
The United Kingdom of Great Britain and Northern Ireland
71. Роль СМИ в современном мире (The mass media in the life of Society)
72. The Adverse Effects of Green Lawns
The Adverse Effects of Green Lawns

73. On the problem of crystal metallic lattice in the densest packings of chemical elements

74. Alaska’s Wildlife: on the Verge of Extinction (Живая природа Штата Аляска на грани исчезновения)

75. The Castles of England

76. The role of art in our life

77. Three Waves of Alvin Toffler. The Basic Points

78. The face of every city is different. Washington D.C.

79. The New-York City, Places of interest

80. Династия Тюдоров (essay the house of Tudor)

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81. Raskolnikov and Svidrigailov: on the brink of suicide. Ф.М. Достоевский, Преступление и наказание

82. The history of Old English and its development

83. Consequence of building the National Missile Defense

84. The house of my dream

85. The History of Alaska (история Аляски)

86. Ways of exploring the world
Ways of exploring the world
87. The Influence of English Mass Culture on Estonia
The Influence of English Mass Culture on Estonia
88. Династия Тюдоров (essay the house of Tudor)

89. Evaluating the GPRS Radio Interface for Different Quality of Service Profiles

90. Allergy Enlightenment: Is Modern Medicine Fighting the Causes of This Ailment? Are Doctors Telling Us Everything?

91. Преп. Максим исповедник о бесконечности человека (st. Maximus the confessor on the infinity of man)

92. Особенности ведения бизнеса в Китае (The peculiarities of marketing strategy development in China)

93. Redesigning the Dragon Financial Reform in the Peoples Republic of China

94. The history of England can be defined as the gradual process of Parliament asserting its authority over the monarchy

95. The practice of modern medicine

96. Out Of Crisis

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97. The Problem of Holmelessness in Canada

98. Переведенная на английский лекция по теме Money and banking (деньги и банковское дело), the role of banks (роль банков), modern banking (современная банковская система)

99. Polysemy In The Semantic Field Of Movement In The English Language


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