Product Overview

Multiple-Input Multiple-Output TWR Vibration Control

MIMO Time Waveform Replication (TWR) Control System provides precise, real-time, multi-channel control for long waveform duplication. MIMO TWR is capable of running an unlimited number of time profiles in a defined schedule. Multiple long waveforms can be duplicated precisely on the shaker just as they were recorded. It includes Waveform Editor (EDM-WE), a flexible importing and editing tools for long waveform signals. The recording option allows the recording of time stream data at the full sample rate on all input channels. Up to 8 channels can be enabled for control and time data recording on master front-end. Up to
512 channels can be enabled for control or monitoring, and time data recording.

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Key Features

  • Number of Waveform Profiles: Infinite number of waveform recordings (subject to the available flash memory) is supplied simultaneously to automatically run one after the other on the test specimen.
  • Maximum Number of Points: all internal flash memory space is used for storing profile data (currently 3.7 GB), which corresponds to approximately 1 billion data points. At a sampling rate of 200 samples / sec. It can replicate a waveform of about 50 days.
  • Maximum Frequency Range: waveforms of up to 18 kHz (fa) can be replicated.
  • Maximum Sampling Rate of Data: waveforms of any sampling rate up to 102.4kHz can be imported into the Waveform Editor tool and converted to a suitable frequency range.
  • Continuous Data Recording
    During vibration control, all measurement input and drive signals can continuously record to a Spider-NAS or the internal storage residing in each front-end. Users can view and analyze data files with Crystal Instruments Post Analyzer. The variable sampling rate can be enabled to simultaneously record slow-change signals together with high speed vibration data.

Safety Features

  • Abort Sensitivity: a single parameter allows the ensitivity and tolerance of various safety checks to be asily adjusted between customizable lower and upper bounds
  • Shaker Safety Limits: limits for shaker acceleration, velocity, and displacement
  • Open Loop Detection: open loop detection for control signal and each input channel. Detection is based on maximum control loss or maximum RMS rate of change in the input channels.
  • Control Limits: enforces abort time limits for control signals. Allowable ratio of points exceeding abort limits to total number points in a frame: 0 – 100%
  • Max Drive Limit: maximum voltage limit for drive output
  • Time Domain Limit: Raw, or RMS to any input channel

Available Options

For further information on options available for this Product, please contact our specialist sales team on:

+44 (0) 1462 481859 or

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Monitoring Through EDM Cloud

All tests in EDM-VCS support status checks through EDM Cloud. With EDM Cloud support, users can set up any VCS test to upload live data or run logs for completed tests to a cloud storage space provided by Crystal Instruments, where data is securely stored in the user’s account.

The EDM Cloud website is located at Users can access EDM Cloud from anywhere in the world to check the status of past and current tests. A secure login flow ensures the status can only be checked by authorized personnel with proper credentials. Multiple logins for accessing the same Cloud account is available.