.. Vibration Toolbox documentation master file, created by sphinx-quickstart on Sun Apr 9 10:02:35 2017. You can adapt this file completely to your liking, but it should at least contain the root `toctree` directive. ========================= OpenModal Software Manual ========================= `Manual `_ ==== Help ==== .. note:: Options that may require some insight are covered in this Section Preferences =========== This is the main setup control for the OM application. To display the window---> MEASUREMENT---> Measure---> Take me to preferences i. Excitation Type ------------------ This sets the mode in which OM will operated, select either Impulse or Random or OMA ii.Signal ---------- Choose the saved NIMAX task. If not click NIMAX tab. NIMAX: `````` To display the window click on NIMAX * Samples to read or Bandwidth and Rate or Resolution: The Resolution parameter determines how many calculated points there are within the bandwidth. Having a low bandwidth and a high resolution will slow down the test but increase accuracy Window length: `````````````` Zero padding: ````````````` It simply refers to adding zeros to end of a time-domain signal to increase its length. Excitation window: `````````````````` Response window: ```````````````` Averaging: `````````` Averaging is one technique used to decrease the noise in the system. * Linear: All blocks of data are treated equally in terms of their effect on the averaged result. A specified number of averages will be taken. * Exponential: Similar to linear averaging, Exponential requires a weighting factor which either increases or decreases the effect of each new data block on the resultant average. Save time-history: `````````````````` Trigger lever (excitaiton): ``````````````````````````` Used to set the threshold for analog signal triggering. Any signal exceeding the threshold voltage will be used as the trigger. Pre-trigger samples: ```````````````````` The duration of samples which you would like to store the result into the data before the trigger event. MEASUREMENT ============ Roving: ------- Reference node: --------------- Reference node is the sensor location node. Response node: -------------- ANALYSIS ======== FRF: ---- SUM: ---- CMIF: ----- LSCF: ----- LSCE: -----