Application Functions
• Random
• Sine-on-Random
• Random-on-Random
• Swept Sine
• Resonant Search and Tracked Dwell
• Classic Shock, Transient, SRS
• Time Data Replication
• Limiting and Notching
• Shaker Diagnosis Tools
• Data Recording and Dynamic Signal Analysis
• Thermo Chamber Interface
Spider-81 is a highly modular, distributed, scalable vibration control system developed by Crystal Instruments. It represents the fourth generation of vibration control systems because its advanced technology is not seen in any other products. It includes a complete suite of vibration control modules including Sine, Random, Sine-on-Random, Random-on-Random, Classical Shock, SRS, Time Data Replication, and Dynamic Signal Analyzer functions.
DSP Centralized Architecture
Unlike traditional controllers that rely heavily on an
external computer for real-time operation, Spider is
the first controller that directly integrates timesynchronized
Ethernet connectivity with embedded
DSP technology. This strategy greatly increases the
control performance, system reliability, and failure
protection of the controller. It also allows large
numbers of channels to be configured without
sacrificing system performance.
Black Box Mode: Run without PC
The Spider-81 can run autonomously in Black Box
mode without a PC connected. In this mode, a PC is
used only to configure the control system before
operation and to download data after the test is
complete. During the test, the controller can be
operated according to a preset schedule or from a
variety of external devices, such as a control pendant,
Wi-Fi enabled PDA, or iPad.
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Simple Network Connection
Ethernet connectivity allows the Spider-81 to be
physically located far from the host PC. This
distributed structure greatly reduces the noise and
electrical interference in the system. One PC can
monitor and control multiple controllers over the
network. Since all the control processing and data
recording are executed locally inside the controller,
the network connection will not affect the control
reliability. With wireless network routers, the PC can
easily connect to the Spider remotely via Wi-Fi.
Latest Hardware Design
Spider-81 modules have voltage, charge, and IEPE
inputs which are ideal for shock, vibration, acoustic,
or general purpose voltage measurement. The internal
flash memory stores test configuration and real-time
analysis data for up to hundreds of channels
simultaneously. Multiple output channels provide
various signal output waveforms that are
synchronized with the input sampling rate. The front
panel has 5 function buttons and a bright LCD that
displays test status information. Ten monitoring
connections on each unit can be used to read the
signals of analog inputs and outputs. There are built
in isolated digital I/O and RS485 serial ports to
interface with other hardware. There is a connection
for an emergency abort button. Floating power design
reduces ground loop problems in the controller
installation.
Time Synchronization between Multiple Modules
The Spider-81 is built on IEEE 1588 timesynchronization
technology. Spider modules on the
same network can be synchronized with up to 100 ns
accuracy, which guarantees ±1 degree cross channel
phase match up to 20 kHz.
On-Board LCD Display
Each Spider-81 is equipped with a bright front panel
LCD that displays system status and test information.
Real-time status such as control RMS or sweeping
frequency can be in
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