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Home > Excitation > Modal Shaker FAQ

Modal Shaker FAQ

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Modal Shaker Related Questions

What is the advantage of a through-hole armature?

When do I need to use inertial masses? What frequency does it become important to use inertial masses?

How critical is alignment to shaker performance?

What is the best way to align the shaker when setting up a test?

Why does my shaker have multiple force ratings?

At what time during a modal test set up should the shaker be attached to the structure?

Should I disconnect the stingers while not testing?

What is a trunnion? What can I do with it?

How do I mount my shaker to the floor?

My shaker is vibrating out of place during the test, what should I do?

What is the best way to support my shaker to provide lateral inputs to my structure?

What are the most common practical failures in a shaker installation/operation?

What type of maintenance does my shaker require?

Amplifier Related Questions

What is the difference between the constant current and constant voltage settings on the shaker amplifier? What applications are best for each?

My amplifier has a current monitor output. What is it for?

How well does the amplifier current output correlate with the excitation force?

Can I use amplifier current output to accurately estimate the excitation force input to the test structure?

What is the importance of the frequency specification of the amplifier?

Stinger Related Questions

Why should I use stingers?

How do piano wire stingers work? How are they pre-tensioned?

How short (or long) should I make my stingers? What is the useable frequency range for force input based upon stinger type and length?

Why should I use a modal stinger (thin rod type, like models 2150 or 2155) instead of a threaded rod stinger?

How many degrees of misalignment can a standard stinger absorb at what inaccuracy level?

When do I use the aluminum composite tube around the nylon 10-32 threaded rod stinger?

Sensor Related Questions

What is the proper mounting technique for the force transducer?

What is an impedance head? Why should I use it?

Modal Excitation General Questions

What is the correct amplitude level for modal testing applications?

How many shakers should I use in my modal test?

How do I use an impact hammer to determine the proper position and alignment of my shakers for modal testing?

What is the advantage of the different common excitation techniques random, burst, chirp, sine, etc.?

Why bother with Multiple Input Multiple Output (MIMO) testing? Why cant you just run a Single Input Single Output (SISO) test several times?