Vibration Analysis Software

All objects in motion vibrate. So when the operator comes to you as a mechanic and complains about "excessive vibration"

what is excessive?
Is it abnormal?
How do I fix it?
What are "IPS"?

Difficult questions. This software quickly gives you the understanding of what a vibration is and an understanding of vibration measurements.

Converts between the three primary units of measure that define engine vibration; Displacement, Velocity, and Acceleration. Also computes engine vibration orders and discusses engine pendulum absorbers.

Pendulum absorbers "counterweights" are used on aircraft piston engines to absorb torsional (twisting) vibrations caused by the firing of the cylinders. Shown here are two sixth order absorbers.

Typically, six cylinder Lycoming and Continental engines use two sixth orders absorbers on the rear of the crankshaft. In the center there may be a 4th, 5th or 6th order.

A vibrating object has three characteristics that help expose the source of the vibration:

How fast is the object traveling,
how far is it traveling,
and, what acceleration forces does it have.

How fast (IPS) or inches-per-second is the standard measurement as it is rpm independent. A 2 ips vibration is 2 ips at 100 rpm or 10,000 rpm. This makes comparison easier.

IPS is how often or how frequently an object oscillates or moves back-and-forth from the neutral position to its upper and lower extreme limits.

Displacement measures the change in location. An earthquake can have a low IPS but a large amount of displacement.

The forces of acceleration or G forces often define the loading from the vibration. I recall one aircraft accident where the G forces from vibration from the airframe was of such intensity that it kept the pilot's eyeballs from focusing on the flight instruments.