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Spectrum resolution гэж юу вэ?

Frequency peak-үүдийг ялгаж харах чадвар

Frequency resolution юунаас хамаардаг вэ?

FFT line number ба sampling time

Nyquist frequency гэж юу вэ?

Sampling frequency-ийн хагас

Aliasing гэж юу вэ?

High frequency signal low frequency мэт харагдах үзэгдэл

Anti-aliasing filter юунд хэрэгтэй вэ?

Aliasing-ийг урьдчилан сэргийлэх

Sampling frequency гэж юу вэ?

Нэг секундэд хэдэн data point авах давтамж

Window function юунд ашиглагддаг вэ?

Spectral leakage багасгах

Hanning window ямар үед ашигладаг вэ?

General vibration analysis

Flat-top window юунд тохиромжтой вэ?

Amplitude accuracy өндөр шаардлагатай үед

Rectangular window юунд ашиглагддаг вэ?

Transient signal analysis

Spectral leakage гэж юу вэ?

Frequency energy хөрш frequency рүү тарах

Averaging юунд хэрэгтэй вэ?

Random noise бууруулах

Linear averaging ямар signal-д тохиромжтой вэ?

Steady vibration signal

Exponential averaging ямар үед ашигладаг вэ?

Trending measurement

Peak hold averaging юунд ашиглагддаг вэ?

Transient vibration илрүүлэх

Envelope detection гэж юу вэ?

Bearing impact signal илрүүлэх арга

Demodulation analysis юунд ашиглагддаг вэ?

Early bearing fault detection

High-pass filter юунд хэрэгтэй вэ?

Low frequency vibration устгах

Low-pass filter юунд хэрэгтэй вэ?

High frequency noise устгах

Band-pass filter гэж юу вэ?

Зөвхөн тодорхой frequency band дамжуулах

Band-stop filter гэж юу вэ?

Тодорхой frequency band устгах

Spectrum floor гэж юу вэ?

Spectrum-ийн noise level

Noise floor өндөр байвал юу болдог вэ?

Жижиг peak харагдахгүй болно

Dynamic range data collector гэж юу вэ?

Maximum ба minimum signal ялгах чадвар

Data collector sensitivity гэж юу вэ?

Small vibration signal detection capability

Triggering гэж юу вэ?

Time waveform capture эхлэх нөхцөл

Impact testing гэж юу вэ?

Natural frequency тодорхойлох арга

Modal analysis гэж юу вэ?

Structure vibration mode судлах

Mode shape гэж юу вэ?

Structure vibration deformation pattern

Operational deflection shape гэж юу вэ?

Mашин ажиллах үед structure movement

Transfer function гэж юу вэ?

Input vibration ба output vibration харьцаа

Coherence гэж юу вэ?

Measurement reliability indicator

Coherence value хэд байх ёстой вэ?

0.8–1.0

Orbit plot гэж юу вэ?

Shaft хөдөлгөөний trajectory

Shaft centerline plot гэж юу вэ?

Shaft position change график

Polar plot гэж юу вэ?

Amplitude ба phase график

Bode plot гэж юу вэ?

Amplitude ба phase vs speed график

Waterfall plot гэж юу вэ?

Spectrum vs speed 3D график

Cascade plot гэж юу вэ?

Speed change spectrum sequence

PeakVue analysis гэж юу вэ?

Impact detection vibration method

Shock pulse method гэж юу вэ?

Bearing defect detection method

Crest factor гэж юу вэ?

Peak amplitude / RMS ratio

Crest factor өсөх нь юуг илтгэдэг вэ?

Impact vibration

Kurtosis гэж юу вэ?

Signal impulsiveness хэмжих параметр

Kurtosis өндөр бол юу илтгэдэг вэ?

Bearing defect

RMS гэж юу вэ?

Root mean square vibration amplitude

Peak amplitude гэж юу вэ?

Maximum vibration value

Peak-to-peak amplitude гэж юу вэ?

Maximum – minimum amplitude

Overall vibration гэж юу вэ?

Broadband vibration level

Octave band analysis гэж юу вэ?

Frequency band vibration analysis

1/3 octave analysis юунд ашиглагддаг вэ?

Noise analysis

Acoustic emission гэж юу вэ?

High frequency stress wave detection

Ultrasound inspection гэж юу вэ?

High frequency fault detection

Lubrication defect vibration шинж

High frequency broadband

Gear wear vibration шинж

Gear mesh harmonics

Gear eccentricity spectrum шинж

Gear mesh ± running speed sidebands

Tooth crack vibration шинж

Impact peaks

Fan imbalance vibration шинж

Strong 1X peak

Fan blade defect vibration шинж

Blade pass frequency peak

Pump hydraulic instability spectrum

Broadband vibration

Pump recirculation vibration

Random low frequency noise

Pump cavitation waveform

Irregular impacts

Compressor surge vibration

Large low frequency oscillation

Electrical looseness vibration

50 Hz peak

Broken rotor bar vibration

Sidebands around running speed

Stator defect vibration

Line frequency peaks

Soft foot гэж юу вэ?

Machine base uneven support

Soft foot vibration effect

Misalignment-like spectrum

Thermal misalignment гэж юу вэ?

Machine heating alignment change

Pipe strain гэж юу вэ?

Pайп холболт machine alignment өөрчлөх

Rotor rub vibration шинж

Subharmonics

Partial rub vibration

1/2X peaks

Full rub vibration

Multiple harmonics

Resonance test method

Bump test

Impact hammer юунд ашиглагддаг вэ?

Natural frequency measurement

Shaker test гэж юу вэ?

Controlled vibration test

Damping ratio гэж юу вэ?

Vibration decay rate

High damping effect юу вэ?

Resonance amplitude багасна

Low damping effect юу вэ?

Resonance amplitude ихэснэ

Critical speed crossing гэж юу вэ?

Rotor resonance speed

Rotor dynamics гэж юу вэ?

Rotating shaft vibration study

Forward whirl гэж юу вэ?

Shaft rotation direction whirl

Backward whirl гэж юу вэ?

Opposite direction whirl

Synchronous vibration гэж юу вэ?

Running speed frequency vibration

Sub-synchronous vibration гэж юу вэ?

Running speed-ээс бага frequency vibration

Super-synchronous vibration гэж юу вэ?

Running speed-ээс их frequency vibration

Bearing clearance effect vibration

Random broadband vibration

Over lubrication vibration шинж

High temperature + vibration

Under lubrication vibration шинж

Bearing frequency peaks

Contaminated lubrication vibration

High frequency noise

Misaligned belt drive vibration

1X belt frequency

Worn belt vibration

Random vibration

Pulley eccentricity vibration

1X pulley speed

Chain drive vibration шинж

Chain frequency peaks

Rolling element skidding vibration

Random spikes

Rotor crack vibration шинж

Sidebands around 1X

Fatigue failure vibration шинж

Harmonics increase

Machine structural resonance indicator

Large amplitude change with speed

Isolation mount effect vibration

Low frequency vibration reduction

Machine foundation stiffness effect

Natural frequency shift