Static Stability vs Dynamic Stability
Feem ntau qhov kev ruaj ntseg ntawm lub dav hlau txhais tau tias yog lub dav hlau lub peev xwm los txhawb nqa ib qho tshwj xeeb, kev teem caij dav hlau. Lub tswvyim ntawm stability yog ze ze rau qhov sib npaug ntawm lub dav hlau. Yog hais tias lub net zog thiab lub sij hawm exerted ntawm lub aircraft yog xoom, lub aircraft nyob rau hauv equilibrium, nyob rau hauv uas ya davhlau; piv txwv li lub nqa sib npaug ntawm qhov hnyav, lub zog sib npaug ntawm lub luag, thiab tsis muaj lub sijhawm quab yuam ua rau lub dav hlau.
Kev ruaj ntseg yog dab tsi?
Thaum lub dav hlau ua rau muaj kev kub ntxhov (lossis qee yam ntawm qhov tsis txaus ntseeg) thaum nyob hauv qhov sib npaug sib npaug, lub qhov ntswg qaij me ntsis nce lossis nqis (nce lossis txo qis ntawm lub kaum sab xis ntawm kev tawm tsam), lossis yuav muaj kev hloov me ntsis hauv kev ya davhlau. Muaj cov rog ntxiv ua rau lub dav hlau, thiab nws tsis nyob hauv qhov sib npaug ntxiv lawm.
Yog hais tias lub dav hlau tseem nce kev taw qhia tom qab muaj kev cuam tshuam, lub dav hlau tau hais tias tsis ruaj khov. Yog tias tsis muaj kev hloov pauv ntxiv hauv kev ya davhlau thiab yog tias lub dav hlau tuav txoj haujlwm, uas txhais tau hais tias tsis muaj lub zog loj lossis lub sijhawm ua haujlwm ntawm lub dav hlau nyob rau hauv kev taw qhia tshiab ib yam nkaus, ces lub dav hlau tau hais tias tsis muaj qhov nruab nrab. Yog hais tias lub zog raug tsim los ntawm lub dav hlau nyob rau hauv ib txoj kev xws li cov quab yuam ua rau muaj kev cuam tshuam, thiab lub dav hlau tau txais nws txoj haujlwm qub, ces lub dav hlau tau hais kom ruaj khov.
Hauv dav hlau, peb hom kev ruaj khov yog suav tias yog. Cov no yog cov longitudinal stability uas cuam tshuam rau pitching motion, directional stability uas txhawj txog lub yawing tsab ntawv tsa suab, thiab lub lateral stability uas cuam tshuam cov rolling motion. Feem ntau cov longitudinal stability thiab directional stability yog zoo sib xws.
Dynamic Stability yog dab tsi?
Yog tias lub dav hlau ruaj khov, nws yuav raug peb hom oscillatory motion thaum lub davhlau. Thaum qhov tsis sib haum xeeb tshwm sim lub dav hlau sim khaws nws txoj haujlwm, thiab nws mus txog qhov sib npaug ntawm txoj haujlwm los ntawm kev sib tsoo ntawm cov oscillations, thiab lub dav hlau tau hais tias yuav tsum ruaj khov. Yog hais tias lub dav hlau txuas ntxiv cov lus tsa suab oscillatory yam tsis muaj kev lwj hauv qhov loj, ces lub dav hlau tau hais tias nyob rau hauv nruab nrab dynamically. Yog hais tias qhov magnitude oscillatory motion nce thiab lub dav hlau orientation pib hloov sai heev, ces lub aircraft yog hais tias yuav dynamically unstable.
Ib lub dav hlau uas yog ob qho tib si statically thiab dynamically ruaj khov tuaj yeem khiav tawm ntawm tes, tshwj tsis yog tus kws tsav dav hlau xav hloov qhov sib npaug ntawm lub dav hlau.
Qhov txawv ntawm Dynamic thiab Static Stability (ntawm Aircrafts) yog dab tsi?
• Static stability ntawm ib lub dav hlau piav qhia txog qhov nyiam thiab dav hlau los tuav nws txoj haujlwm qub thaum raug quab yuam los yog lub sijhawm ua haujlwm ntawm lub dav hlau.
• Dynamic stability piav txog daim ntawv ntawm kev txav ib lub dav hlau nyob rau hauv zoo li qub stability undergoes thaum nws sim rov qab mus rau nws thawj txoj hauj lwm.
Diagram Sources: NASA
