The Mini SmartShaker™ with Integrated Power Amplifier is an electrodynamic exciter designed for general purpose vibration testing of small components and sub-assemblies up to 11 kHz. It can also be used as excitation for modal testing of small structures.
The convenience of the SmartShaker™ "all-in-one" integrated amplifier package eliminates need for the separate and bulky power amplifier
It's compact size makes the shaker assembly ideally suited for applications such as production screening, reliability acceptance testing, and engineering evaluation of test articles under controlled vibration conditions.
The shaker body structure and trunnion assembly are designed to allow a variety of operating positions. The shaker is typically used in the vertical orientations and can be rotated up to 90° for horizontal applications. The shaker can also be suspended from it's trunnion to accomodate exciting a test article from different angles. The excited is delivered with a variety of 10-32 nylon stingers which provide electrical isolation from and flexible attachments to test articles.
The gain knob was intentionally designed to be difficult to access. Typically the gain is set once and does not change. Shaker level is controlled via input signal level coming from an analyzer, vibration controller or function generator.
The K2004E01 and K2007E01 are specified up to 9 kHz and 11 kHz respectively. This can be seen as a conservative specification considering the SmartShaker™ has a primary resonance typically around 10 kHz. Based on ISO 5344, the relevant shaker ISO standard, shakers are typically useable to approximately 1.5 times the primary resonant frequency. Accordingly, these shakers would certainly be useable to approximately 15 kHz. The shakers will certainly work to much higher frequencies, but at some point force "drop-outs" will be seen, where the shaker has near zero output regardless of input energy. Since these resonance (and anti-resonances) shift depending upon load, with higher mass load (by spec the K2004E01 and K2007E01 can support 2 lbs of payload) will tend to decrease this useable frequency range. With that said, reaching 15 kHz with a lighter payload is attainable.
The minimum value is zero volts. The maximum recommended input voltage is determined by the gain setting. There are three discrete gain levels available. Maximum signal input for full unclipped output will vary between 0.25 – 1 Vrms dependent on the gain. After that, clipping starts to occur. The absolute maximum input voltage is approximately 1.9 Vrms.
The payload refers to the total weight due to the mass of the test specimen plus any type of test fixture used. A 2 lbs (0.91 kg) payload is a general guideline. For vertical operation, the shaker stroke capability is 0.5” pk-pk or ± 0.25”. Any load you put on the shaker will offset the armature down. A static deflection of the armature is permissible as long as the sum of the requited test displacement and the static deflection is less than 0.25" from the neutral position.
The trunnion base is the blue base around the shaker. It allows rotation of the shaker to the right angle orientation; it also allows the shaker to be suspended or the attachment of the shaker to a table or mounting surface for testing.
The SmartShaker™ is designed to provide trouble-free service for long periods of time when operated with the performance limits and in an environment which is free of excessive dust, metallic particles and other potentially harmful materials. The only maintenance that should be performed on a routine basis, outside of replacement of work or damaged components, is the cleaning of the air filter. Inspection of the shaker moving element (flextures, armature and wiring) can be performed if operational problems are suspected.