News

Check here for the latest product developments and information.

Non-Gaussian Random Control

The VWIN II Random Test Control now offers an optional Non-Gaussian Control feature. This provides for a Non-Gaussian amplitude distribution with greater occurrence of amplitude peaks and higher Kurtosis values. Recent studies in this area have suggested that normal Gaussian distribution may not accurately reproduce the service environment. For normal Gaussian distributed waveforms, the majority of the peaks (99.9984%) are within 4X the test RMS. For a Non-Gaussian field environment, higher peaks may occur, extending into the range of 4-12 (or more) times the test RMS. Contact a UD Application Engineer for details.

Three inch Stroke Shakers now Available.

Unholtz-Dickie is pleased to announce 3 inch (76 mm) stroke is now optionally available on UD shaker's rated from 9,000 to 50,000 lbf. UD Models R16, T2000, T4000 and T5000 can now be configured with the extended stroke option.

In addition a new high force shaker, the Model T5500 has been added to the popular Induct-A-Ring Shaker Series. The T5500 is rated at 55,000 lbs (244 kN) Force Sine / Random and 3 inch (76 mm) Stroke, a combination unmatched in the industry!

New, shaker for wide screen TV testing.

The enormous growth of the Flat Screen Television industry has prompted Unholtz-Dickie to design new, large platform shaker systems. With a 72 x 72 inch surface area, this 10,000 pound force system allows multiple packaged televisions to be tested at the same time. External guide bearings and load support air bags provide additional restraint and load support to handle tough transportation and other challenging test profiles. This system is currently in operation at a prominent television manufacturer in Mexico, and is exceeding all of its performance requirements and expectations.

New 13,500 lbf, 100% Air Cooled, 3" Stroke Shaker System.

A new system configuration has been added to the popular R-Series family of vibration test systems from Unholtz-Dickie. The Model SAI90-R16C-3 provides a full 3 inch peak to peak stroke, and is rated at 13.5k lbf Sine / 13.5k lbf Random. With a lightweight, 17.5-inch diameter armature, this new R16 machine substantially increases test performance and flexibility, particularly for many of the demanding, low frequency transportation and shock pulse requirements commonly used in the automotive and military industry. Performance highlights include:

118 g-pk Max Sine Acceleration
80 grms Max Random Acceleration
193 in/sec Shock Velocity
100g - 11msec Shock with 180 lb load

Why are so many companies choosing the Vwin II Vibration Controller?

Extensive Test Library: Vwin II offers the most extensive test library, including Swept and Discrete Sine, Random, Shock, SMART Tool, Resonance Dwell, Sine on Random, Random on Random, SRS, Field Data Replication, Data Acquisition and Analysis, Transducer Calibrator, Calibration Kit, Import and Export Utilities, Netlink Operation, Remote Interfaces (RS232, TCP/IP, digital I/O). Start with the basics and easily add as necessary.
More Standard Features: Vwin II offers more standard, desirable features not commonly found with other controllers. Some of the outstanding functions included with all Vwin II bundled software packages are 2000 lines resolution in Random, Limit/Notching, Export Data & Graphics Utility, Import ASCII Utility, Test Data Overlay, Multi-user Password Protection, Sine COLA Output, Shock External Trigger, Channel Aborts, and Network Operation.

SMART Tool: Bundled packages include the SMART Tool, which provides for manual sinusoidal oscillator operation with output amplitude and frequency adjustments. The accelerometer signals are measured and displayed graphically. The SMART Tool is extremely useful for evaluating fixtures and test specimen, and is an excellent diagnostic tool for verifying overall system operation and locating faults. The SMART Tool is offered exclusively by UD and is a "must" for any lab.
High Performance Workstation: Includes a high performance workstation as standard: An Intel 2.8 GHz Pentium 4 Processor, 512 MB DDRAM, a large 120 GB HDD and a 17" Flat Panel LCD Display.
Integration & Calibration Prior to Shipping: UD performs complete hardware / software integration, testing and calibration of the Vwin II at the UD factory prior to shipment, ensuring "out of the box" operation, without further cumbersome hardware settings, file loading, or software configuration selections.
Proven, Field-tested Design: Vwin II was built by a shaker system company (not a third party software company) that has extensive experience with the vibration test industry’s overall test requirements and fully understands the dynamics of the shaker/amplifier and controller interaction. As an end user itself, UD appreciated the utility of the Vwin II as a powerful but simple and productive control/analysis tool.
Easily Expandable in the Field: Vwin II has 4, 8 and 16 channel configurations available. Other controllers may not be expandable or require additional external hardware.
Designed for Highest Shock / Random Performance: Specially designed control algorithms help achieve the highest Shock / Random performance from the shaker system. Some controllers require up to 50% more velocity or stroke for the same test.
Optimum Hardware Design: Optimum hardware design maximizes dynamic range and signal to noise ratio, utilizing 24-bit precision scaling stages for each input and output. Competitive controllers utilize cheaper, less capable designs, resulting in lower overall system performance.
User-Friendly: Vwin II provides an extremely user friendly, intuitive interface with single point/click commands and a centralized Home Page that smoothly integrates and coordinates the test setup parameters, running the tests, analysis of the vibration, and storage / retrieval of test data. This is in sharp contrast to the competitor’s.
SA Command Link: SA Command Link option is an exclusive UD feature. The SA Amplifier / Shaker control panel operations, including start-up and shutdown can be initiated and monitored directly from the Vwin II Controller screen. All status indicator lights as well as the output current & voltage readings are displayed at the Vwin II . The Power Save mode, will automatically power down the SA Series Amplifier, field supply and cooling system after a test is finished or if the test aborts for any reason. Current and voltage limit selections offer further system and test item protection.
Word Report Generator: Word Report Generator makes post-test document generation a single mouse click away. Test report content is user configurable in a simple to use, configuration template. Selected test setup parameters, the test reference spectrum, Status information, user defined text, and test graphical data can be included in the report, then edited, printed or sent via email as a word document.

New Armature Size for the S452 Shaker

The popular S452 medium force range shaker system (4,500 - 6,000 pounds force) is now available with either a 12 inch (305 mm) or a 16 inch (406 mm) diameter armature table. The multi-ribbed armature design provides high resonance frequency and low mass, and is ideal for testing medium sized products, or multiple smaller test items.

New Extended Stroke T2000-3, T4000-3, T5000-3 Vibration Systems

Unholtz-Dickie now offers the popular Induct-A-Ring Shaker System's (T2000, T4000, T5000) with optional extended stroke capability. Developed for those test specifications that require more than the standard 2 inch pk-pk stroke, the new shakers are rated at a full 3 inches (76 mm) pk-pk. Contact a UD Applications Engineer for system specifications.

New Extended Stroke R-Series Vibration Test System

The R16 Series Shaker Systems now offered with optional extended stroke capability (up to 3 inches (76 mm) pk-pk). Rated from 9,000 to 13,000 pounds force, the Extended Stroke R16-3 supports a variety of applications for medium to large payloads. The extended stoke option satisfies numerous transportation and shock specifications that require more stroke than conventional 2" shakers can provide.

New High Frequency Shock System

Unholtz-Dickie introduces ultra-high Shock performance with the new Model SAI180-S092-MXA electrodynamic shaker system. This system is capable of accurately reproducing 5,000 g SRS shock pulses at frequencies to 10,000 Hz. Applications include testing of sensors, fuses, weapons sights, and other military hardware and aerospace components.

New Electrodynamic Seismic Test System

Unholtz-Dickie introduces a new vibration test system that performs the diverse requirements of the Bellcore (GR-63-CORE) test specification for telecommunications equipment. This new system combines the high frequency, low noise benefits of an electrodynamic shaker with long stroke capability.

Until now, multiple test systems were required to run all the vibration tests requirements of the Bellcore specification. Typically, a standard electrodynamic shaker would be used to run the Office and Transportation Vibration profiles, while a long stroke hydraulic actuator would be used to run the Seismic Waveform.

Major advances in long stroke electrodynamic shaker design allow all tests to be run on one test system, resulting in lower capital equipment costs, as well as increased performance and test accuracy.

Electrodynamic Seismic Test System

H Series High Frequency Vibration Test System

New High Frequency Vibration Test System

Unholtz-Dickie now offers a special high frequency armature for the popular H560 electrodynamic shaker series. This large 13 inch armature design increases the resonance frequency, allowing full 6,500 lbf sine performance to 4,000 Hz, and 6,500 lbf random performance to 5,000 Hz. This system is ideal for high frequency testing of medium size products for the aviation, defense, automotive and electronic industries.

New 1500 g Shock Test

Extreme Shock performance with the new Model S092-UX electrodynamic shaker system. This new system is capable of accurately reproducing 1,500 g half-sine and 4,000 g SRS shock pulses, for use on small products. Applications include reliability testing of disk drives, fuses, air bag sensors, and aerospace components.

TRAC (Time Replication Acceleration Control) Vibration

Finally, real world vibration testing is achievable in the test lab utilizing TRAC control software! Test engineers can precisely reproduce long time waveforms (up to 20 minutes) of captured vibration events to 2,000 Hz. Cycling of whole/parts of the waveform allow for thousands of hours of testing. Applications include qualification, accelerated life, endurance and buzz, squeak and rattle testing of automotive components.

SA-Command Link

The Vwin II now offers an optional RS232 Amplifier/Shaker interface and a software command/status panel to operate UD's newly enhanced SA and SAI Series amplifier/shaker systems. The SA-Command Link provides identical functionality as the standard SA/SAI Amplifier front panel switch buttons, LED status indicators and current/voltage meters. In addition, it provides a "Power Save" selection to automatically power down the UD SA/SAI amplifier/shaker system after a test has finished or aborted. Now the complete UD test system can be initiated, monitored, and controlled from one convenient location.

Amplifier Shaker Startup

System Command Functions:
Off
On
Ready
System Power
Operate
Amp Gain
Single Button Startup
System Fault Resets
Automated "Startup" from External Input (i.e. temperature chamber)
System Mode Indicators
Current/Voltage Limits

"Power Save" Mode

Automatically powers down the SA/SAI amplifier/shaker system after a test finished or abort condition.

Amplifier Indicators

Overtemp, Peak Current Limit, Voltage Limit, CM Fault, Door Interlocks
Output Current & Voltage Meter
DC Supply Current &Voltage Meter
Amplifier Gain Indicator

Shaker Indicators

Overtemp, Current Limit, Overstroke
Field Power, Coolant, ST Oil, Heat Exchanger Faults

Vwin II Remote Pendant

Vibration and Shock test productivity and test operator convenience can be enhanced by using the Vwin II Remote Pendant option now available on all new Vwin II Control Systems. This hand-held control accessory utilizes the Vwin II RS-232 interface and up to 100 feet of interconnect cable to provide pushbutton operation of the Vwin II for the following functions:

Start Test
Stop Test
Select Auto or Manual Mode
Increase or Decrease Vibration Level
Adjust Test Frequency (sine mode)
Reverse Sweep (sine mode)
Select Test Sequence Mode
Save Data (at workstation)
Print Data (at workstation)
View Test Status Information

The Remote Pendant is available as an upgrade option for existing Vwin II controllers using Version 4.1 software or higher.

Earthquake (Bellcore) Test Control

The Vwin II now offers the ability to create and reproduce low frequency, long duration time waveforms to simulate earthquake/seismic vibration. These specifications are part of the Bellcore (NEBS) test requirements for telecommunications and electronic equipment. This option requires the classical shock control module.

New SALL Series Replacement Power Amplifiers

Unholtz-Dickie offers a full line of high performance Class D switching power amplifiers. These amplifiers are offered as replacements for older, water-cooled vacuum tube amplifiers or bipolar transistor amplifiers.

Key Benefits Include

Totally Air-Cooled
Modular Design (15 to 480 KVA)
Class D, High Efficiency Switching Design: >90% Efficiency
Advanced IGBT Design Outperforms Older MOSFET Technology
EMI Shielded Cabinet
Small Footprint
Increased Shock Performance
NO Transformer Coupling
SA-Command Link for Remote Operation from Vwin II
Very Low Maintenance