14-mavzu. Optimallashtirish masalalari. Transport masalasi. Ma’ruza mashg’uloti rejasi

EAVTO moduli
Harakatning turg'unlik sohasini umumlashgan Shturm qatori usuli asosida qurishni avtomatlashtirish.
Harakatning M.V.Keldish nazariyasi asosidagi matematik modeli.
Tizimning umumlashgan koordinatalari: psi,tetta,kci,fi Umumiy holda Sanoq nomeri H = 1 Boshlang'ich ma'lumotlar:
m - 3.6400 kG/m.s.s; 1 = 0.142 m; LI = 0.647 m; A = 0.104 kG.m.s.s; С = 0.124 kG.m.s.s; Bl = 2.000 kG.m.s.s; r = 0.310 m; hac = 0.650 m; all - 46.000 1/m/m; betl = 17.0000 1/m; garni = 1.8401/m; al = 8800.0 kG/m; bl = 160.0 kGm/rad.; sigl =0.460; rol = 0.190 m; al2 = 46.000 1/m/m.; bet2 = 17.000 1/m; gam2= 1.84 1/m; a2 = 8800.000 kG/m; b2= 160.000 kGm/rad; sig2 = 0.460; ro2 = 0.19 m; La = 0.900 m; Lpc = 0.880 m; Cpc = 6150.000 kG.m.s.s; Csh = 10500.00 kG.m.s.s.; ml = 3.64 kG.m.s.s; hpc = 3.80 kG.m.s/rad; he = 2.00 kG.m.s/rad; hsh = 76.00 kG.m.s/rad; haom = 2.00kG.m.s/rad; Kl 1 = 2250.00 kG.m/rad; K2 = 800.00 kG.m/rad; N = 450.00 kG;
Natijada hisoblash eksperimentlari natijalari ekranda 13- shakl ko'rinishida hosil bo'ladi, ularning tahlilidan quyidagi natijalarga ega boiamiz:
1)tizim harakatining turg'unligiga boshqarish ruli qovush-qoqlik koeffitsiyenti h2 ning ta'siri yetarlicha katta. Tizim harakati barcha tezliklarda turg'un bo'lishi uchun kerak bo'lgan minimal qovushqoqlik koeffitsiyenti h_2min ning miqdori shkvoren o'qining bo'ylama og'ish burchagi γ₀ ning miqdoriga bog'liq. Bu funksional bog'lanish 2- jadvalda keltirilgan.
2-jadval

γ0,grad	-6	-4	-2	0	2	4	6
h2min,kg*m*s	2.5	3	3.5	4	4.5	5	5

2) turg'unlik sohasiga tizim harakati tezligi V ning ham ta'siri bor. Harakat tezligi K ning o'sishi bilan noturg'un harakat turg'un harakatga aylanishi mumkin.
Masalan, γ₀ = -6 grad va h2 = 1 kg • m • s bo’lganda,

gamma0= -6.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ --+++++++++ ---++++++++ ----+++++++ -----++++++ 0.00E+00------++++--V 1.00E+01 6.0E+01 a)	gamma0= 6.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ -++++++++++ --+++++++++ --+++++++++ ---++++++++ ----+++++++ ----+++++++ -----++++++ ------+++++ -------++++ 0.00E+00--------++--V 1.00E+01 6.0E+01 b)
gamma0= -1.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ -++++++++++ --+++++++++ --+++++++++ ---++++++++ ----+++++++ -----++++++ ------+++++ 0.00E+00------++++--V 1.00E+01 6.0E+01 c)	gamma0= -1.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ -++++++++++ --+++++++++ --+++++++++ ---++++++++ ----+++++++ ----+++++++ -----++++++ ------+++++ -------++++ 0.00E+00-------+++--V 1.00E+01 6.0E+01 e)

13-shakl

gamma0= -6.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ --+++++++++ 0.00E+00-------------V 1.00E+01 6.0E+01 a)	gamma0= 6.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ -++++++++++ -++++++++++ --+++++++++ ---++++++++ -----++++++ ----------++ ------------ 0.00E+00-------------V 1.00E+01 6.0E+01 b)
gamma0= -1.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ -++++++++++ --+++++++++ ----+++++++ ------------+ 0.00E+00-------------V 1.00E+01 6.0E+01 c)	gamma0= 1.0 grad; h2 | | | V va h2 parametrlir | tekslikda turg’unlik sohasi 8.0E+00+++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ +++++++++++ -++++++++++ --+++++++++ ---++++++++ ------+++++ ------------ 0.00E+00-------------V 1.00E+01 6.0E+01 e)

14-shakl.
tizimning harakati faqatgina V>25 m/s dan boshlab turg’unlashadi. Tezlikning bu qiymati γ₀ burchakning qiymatiga bog’liq bo’lgan γ₀ qiymatining o’sishi bilan V ning qiymati kamayadi;
3) harakat turg’unligiga eng katta ta’sir etadigan parametrlaridan biri shkvoren o’qining bo’ylama og’ish burchagi γ₀ dir. γ₀ burchag qiymatining o’sishi bilan asimptotik turg’unlik sohasi kamayadi;
4) qaralayotgan tizim harakatining har doim h₂ va γ₀ parametrlarning qiymatlarini tanlash usuli bilan turg’un qilish mumukin.
Oldingi o’q (osmaning) avtomabil bo’ylama o’qi atrofidagi tebranishining olingan natijalarga ta’sirini o’rganish uchun ψ=0 holni ko’rib o’tamiz. Bu holni tadqiq etish uchun menyuning 2-bandi tanlanadi, ya’ni tizim harakatining turg’unligini Gurvis kriteryasi asosida (mod_ust1 modulining GURV protsedurasi yordamida) tadqiq etamiz.
Bu hol uchun hisoblash eksperementlarining natijalari quyidagicha bo’ladi: