Mixed mode software

vibration analysistestEDM

Sweeping Modes: sine tones can either be individually configured with sweeping speeds and schedules (Free Sweep mode), or jointly defined as harmonics of the first primary tone (Harmonic mode) Number of Sine Tones (SoR): 1 - 12 in free-sweeping mode; 1 - 20 in harmonic mode, up to 32 when RoR is disabled Number of Bands (RoR): 1 - 12, up to 32 when SoR is disabled. Operation Controls (SoR): Tone On and Tone Off controlled by run schedule, external events, or user commands Operation Controls (RoR): Band On and Band Off controlled by run schedule, external events or user commands Supports up to 512 input channels Mixed Mode Random Vibration Testing Some vibration environments are characterized by quasi-periodic excitation from reciprocating or rotating machines (e.g. rotor blades, propellers, or pistons). These can be simulated as one or more high-level narrowband or sinusoidal vibration components superimposed on a low-level broadband random profile. These are called mixed-mode random tests. There are two types of mixed-mode random tests supported in EDM: Sine on Random (SoR) and Random on Random (RoR). In each of these test types, an additional vibration profile is placed on top of the regular broadband random profile. In Sine on Random, this additional profile consists of one or more sine tones that sweep through a specified frequency range. The random profile may represent a base excitation or background noise level, and the sine tones represent strong single-frequency excitations. A typical profile of SoR described in MIL-STD-810F is shown below. Note that the random broadband profile is defined in units of Power Spectral Density