STACIS
2100 Piezoelectric Isolation System - Installation & Operation Manual
P/N 96-28765-01
Page 8 of 43
2.3.7
Terminology Defined
Terms specific to the STACIS
isolation system and its operation are listed below for your convenience.
Table 2: Terminology Used in the Manual
Term:
Meaning:
STACIS
From the word stasis meaning a stable state
Isolator
A single load-bearing mount providing three axes of active vibration isolation,
connected to a central controller. Three or more isolators are required for a
complete isolation system.
Iso
Interchangeable abbreviation for the Isolator
Controller
The central control and power supply unit with a menu-driven interface
Actuator
A piezoelectric ceramic device used as the actuator in STACIS
isolators
Fault
A system condition which compromises the vibration isolation performance of
one or more STACIS
isolators. Depending on the condition, the Controller
will generate a message on the LCD. The LED on the controller will turn
amber, a message may be sent over the serial port interface, and the axis
where the error was detected may be switched off.
Active
Bandwidth
Range of frequencies covered by the active vibration isolation. A passive
isolator built into STACIS
provides isolation above the active bandwidth.
Flash Memory
Nonvolatile memory in the controller. It contains the STACIS
software and
user-set parameters, such as gains and other preferences.
Compensation
An action by each Isolator to isolate/dampen vibrations that affect the payload
supported by STACIS
Resonant
Frequency
The frequency at which a system will oscillate at when given an impulse (such
as a jump on the floor). This may be electronic (from the servo), or a passive
structural resonance.
Geophone
The vibration sensor used for active isolation in STACIS
POST
Power On Self Test. A self test conducted every time the power to the
controller is turned on.
Wedgemount
A machined low profile adjustable mount inside each isolator used to adjust the
load distribution between isolators in a system with at least 4 isolators.
Wedgemounts have limited travel and are not intended to be used to level the
platform and/or payload.
