Natural Frequency vs Frequency
Zaus ntawm qhov oscillation qhia tias qhov xwm txheej tshwm sim ntau npaum li cas. Frequency thiab natural zaus yog ob lub ntsiab lus tseem ceeb uas tau tham hauv physics. Nws yog ib qho tseem ceeb kom muaj kev nkag siab zoo hauv zaus thiab ntuj zaus kom ua tau zoo hauv thaj chaw xws li nthwv dej thiab kev vibrations, quantum mechanics, engineering engineering, mechanical engineering thiab ntau yam haujlwm. Hauv tsab xov xwm no, peb yuav tham txog dab tsi zaus thiab ntuj zaus yog, lawv cov lus txhais, qhov sib xws, kev siv thiab thaum kawg qhov txawv ntawm zaus thiab ntuj zaus.
Frequency
Frequency yog ib lub tswv yim sib tham hauv ntu ntu ntawm cov khoom. Yuav kom nkag siab txog lub tswv yim ntawm zaus, yuav tsum muaj kev nkag siab zoo ntawm cov lus tsa suab. Ib qho lus tsa suab tuaj yeem suav tau tias yog ib qho lus tsa suab uas rov ua nws tus kheej hauv lub sijhawm. Lub ntiaj teb revolving ib ncig ntawm lub hnub yog ib tug periodic motion. Lub satellite orbiting nyob ib ncig ntawm lub ntiaj teb yog ib tug periodic motion, thiab txawm lub suab ntawm ib tug tshuav pob teeb yog ib tug periodic motion. Feem ntau ntawm cov lus tsa suab peb ntsib yog ncig, linear lossis semi-circular. Ib qho kev txav mus los muaj ntau zaus. Qhov zaus txhais tau tias yuav ua li cas "frequent" tshwm sim. Rau qhov yooj yim, peb siv zaus raws li qhov tshwm sim ib ob. Cov lus tsa suab ib ntus tuaj yeem yog ib yam lossis tsis sib xws. Cov khaub ncaws hnav tuaj yeem muaj qhov sib txawv ntawm qhov nrawm nrawm. Cov haujlwm xws li amplitude modulation tuaj yeem muaj ob lub sijhawm. Lawv yog cov haujlwm ua ntu zus nyob rau hauv lwm cov haujlwm raws sijhawm. Qhov kev hloov pauv ntawm qhov zaus ntawm lub sijhawm ua haujlwm muab lub sijhawm rau ib lub sijhawm. Tej yam yooj yim harmonic motions thiab damped harmonic motions kuj yog periodic motions. Yog li qhov zaus ntawm kev txav mus los kuj tuaj yeem tau siv lub sijhawm sib txawv ntawm ob qhov xwm txheej zoo sib xws. Qhov zaus ntawm lub pendulum yooj yim tsuas yog nyob ntawm qhov ntev ntawm lub pendulum thiab lub gravitational acceleration rau me me oscillations.
Natural Frequency
Txhua qhov system muaj cov cuab yeej hu ua ntuj zaus. Lub kaw lus yuav ua raws li qhov zaus, thaum lub kaw lus tau muab nrog me me oscillation. Lub ntuj zaus ntawm ib qho system tseem ceeb heev. Cov xwm txheej xws li av qeeg thiab cua tuaj yeem ua kev puas tsuaj rau cov khoom nrog tib lub ntuj zaus raws li qhov xwm txheej nws tus kheej. Nws yog ib qho tseem ceeb heev uas yuav tsum nkag siab thiab ntsuas qhov zaus ntawm lub cev ntawm lub cev txhawm rau tiv thaiv nws los ntawm kev puas tsuaj ntuj tsim. Ntuj zaus yog ncaj qha cuam tshuam nrog resonance. Thaum lub kaw lus (piv txwv li lub pendulum) tau txais me me oscillation, nws yuav pib viav vias. Qhov zaus uas nws swings yog lub ntuj zaus ntawm qhov system. Tam sim no xav txog ib lub sij hawm sab nraud quab yuam siv rau lub system. Qhov zaus ntawm qhov kev quab yuam sab nraud no tsis tas yuav zoo ib yam li lub ntuj zaus ntawm qhov system. Lub zog no yuav sim oscillate lub system mus rau zaus ntawm lub zog. Qhov no tsim cov qauv tsis sib xws. Qee lub zog los ntawm lub zog sab nraud yog absorbed los ntawm lub system. Tam sim no cia peb xav txog cov ntaub ntawv uas cov frequencies yog tib yam. Nyob rau hauv rooj plaub no, lub pendulum yuav ywj siab viav vias nrog lub zog siab tshaj plaws absorbed los ntawm sab nraud quab yuam. Qhov no hu ua resonance. Cov kab ke xws li lub tsev, hluav taws xob thiab hluav taws xob circuits, kho qhov muag, suab tshuab thiab txawm tias cov kab mob lom muaj cov zaus ntuj. Lawv tuaj yeem ua rau hauv daim ntawv ntawm impedance, oscillation, lossis superposition nyob ntawm qhov system.
Qhov txawv ntawm Frequency thiab Natural Frequency yog dab tsi?
• Zaus yog ib lo lus uas feem ntau siv los piav qhia tias muaj xwm txheej tshwm sim npaum li cas, thaum lub ntuj zaus yog hais txog qhov zaus tshwj xeeb rau lub cev muaj zog.
• Qhov zaus ntawm lub kaw lus tuaj yeem coj tus nqi, tab sis qhov zaus ntawm qhov muab qhov system yog tus nqi tshwj xeeb.
