GROUP #4

Is the application of mechanical motion to a component, product, system, or structure in order to observe its response or degradation over time.

It simulates real-world situations that a machine, product, or structure can encounter throughout the course of its lifetime, including operational and transit-related circumstances.

The most typical and simple type of vibratory motion.

It would appear on a plot of position, velocity, or acceleration over time.

This is the oldest technique for examining the behavior of products under extreme conditions and verifying their quality.

Parameters of a Sine Vibration Test

It is defined as cycles per second.

The ___ for a sine vibration test is usually specified as displacement or acceleration.

Is equal to the acceleration produced by Earth's gravity.

The interval between one frequency and another.

A frequency at which an amplitude magnification occurs in the device under test when compared to the vibration table amplitude.

Is defined as a travel from one frequency to another.

The rate at which the frequency range is travelled.

Types of Sinusoidal Vibration Testing

Travels or sweeps between a low and high frequency.

Involves vibrating at a specific frequency and G level amplitude.

A vibration test that uses both sine and random vibration.

Vibrations found in everyday life scenarios are not repetitive or predictable like sinusoidal waveforms.

Types of Random Vibration Testing

It identifies specific machine faults where broad-band only identifies overall vibrations levels which encompass a wide range of frequencies.

Vibrations which are unfiltered.

The random vibrations spectrum profile is defined as a ___.

The area under the PSD plot curve is called ___.

The square root of Signal Mean Square.

Is an amplitude histogram with specific amplitude scaling.

It applies a single frequency to a test item and selectively excites resonant structures within the device.

Sine tone is ramped up and down through a range of frequencies and for a specified rate and duration.

Is one comprised of vibration energy at all frequencies over a specified range.

Are a sharp transfer of energy into a mechanical system to test a system's capability to survive a drop, hit, impact, fall, explosion, or any other source of transient.

2 Types of Shock Testing

Types of Shock Testing

This waveform represents a rapid rise in force followed by a quick drop, simulating high-intensity, short-duration shocks.

Pulses are typically defined in terms of acceleration magnitude, pulse duration, and the damping coefficient.

It is characterized by its distinct triangular waveform with a gradual rise in acceleration followed by a sudden drop, resembling the teeth of a saw.

It is characterized by its flat, constant acceleration level, followed by an immediate return to zero.

Types of Classical Shock Testing

This method uses explosive devices to generate controlled shock waves.

A shock test that is performed in order to evaluate and observe the effects of shock on the packaged or unpackaged product.

Two Types of Drop Testing

Also known as a drop test or drop shock test, is a method to evaluate the impact resistance and durability of products when subjected to the forces experienced during a free fall.

Types of Complex Shock Testing

Are designed to re-create complex pulses.

It uses SRS testing to recreate a pulse that is technically equivalent to the initial test requirement in terms of damage potential to provide the same level of test assurance.

It assesses the behavior of a system or device when subjected to harmonic distortion in the electrical waveform.

Are non-sinusoidal components of an electrical signal that occur at integer multiples of the fundamental frequency.

Involves evaluating the response of a system or device to sudden, short-duration voltage or current changes, often referred to as transients or surges.

Can result from events like lightning strikes, switching operations, or load changes and can cause equipment damage or malfunction if not adequately managed.

Types of Harmonic Testing

This involves measuring and analyzing the distortion of the voltage or current waveforms caused by harmonic frequencies.

This assesses the impact of harmonics on the power flow in a network.

Verifies the performance of harmonic filters designed to mitigate harmonic distortion in power systems.

Identifies conditions where resonance between the system impedance and harmonic-producing equipment can amplify harmonics, potentially causing damage.

Types of Transient Testing

Evaluates how a system or device responds to sudden changes in voltage or current, such as voltage spikes or surges.

Simulates lightning strikes or surges to assess how well equipment can withstand such extreme transient events.

Analyzes the effects of rapid switching operation on the power system.

Assesses the resilience of critical infrastructure and electronics to electromagnetic pulses, which can be caused by nuclear detonations or solar flares.

Evaluates how equipment and protection systems respond to short-circuit faults, which can result in transient conditions.