Piezoelectric Accelerometers

The V8000 Range: The Next Generation of Vibration Testing

The high shock performance and low energy consumption of the LDS V8750 and the V8800 herald the new generation of vibration testing. A new generation offering efficiency that goes far beyond saving time.

The new LDS V8800 and V8750 medium-force, air-cooled shaker systems might be everything you need for your accurate and high-performance vibration testing business. Increased shock performance makes them suitable for a range of applications, from qualification testing of automotive parts and systems to telecommunication and satellite component testing or product and package testing with payloads of up to 600 or 700 kilograms respectively. Both systems also offer remote services, an innovative centring system and optimized energy consumption, keeping your investment risks and running costs low.
DISCOM prodction testing analyzer systemsJUMP TO:
1. Improving performance
2. Improving uptime
3. Inductive centring system
4. Energy consumption
5. Reducing acoustic noise
6. Adapt to my needs
7. Applications
8. Which is best for me?

Shaker model V8750 Series V8800 Series
System sine force peak (kN/lbf) 35.6/8,000 59/13,250
System max random force (kN/lbf) 35.6/8,000 66/14,837
Half sine shock force (kN/lbf) 140/31,475 175/39,340
Max acceleration sine peak (m/s²/gn) 1,098/112 1,370/140
System velocity sine peak (m/s – in/s) 2.5/98.4 2.5/98.4
Displacement pk-pk (mm/in) 76.2/3 76.2/3
Moving element mass (kg/lb) 32.9/72.5 43/98.4
Usable frequency range (kHz) DC – 3 DC – 3
Amplifier Model XPA-K XPA-K

 

How does the increased shock force of the LDS V8750 and the new LDS V8800 improve performance?

Electronic control units, whether included in consumer electronics or cars, are exposed to various forces in their daily use. To ensure that they can withstand these shock forces and meet the requirements of customers, markets and industry standards, high acceleration shock tests must be carried out (for example, 150 g 0.5 ms, 150 g 6 ms, 100 g 11 ms, 100 g 6 ms, 50 g 11 ms and 50 g 6 ms).

To achieve high shock performance on a medium-force, air-cooled shaker, a specially designed matching transformer between the amplifier and the shaker was the go-to solution of the past;. The matching transformer achieves optimum performance by using taps, which are normally limited to 2 – 3 tap ratios. It accommodates new test requirements but does not have the optimum tap ratio to perform the test, thus limiting the payload. Additionally, the need for a matching transformer increases the overall cost of the system.

The design of the V8750 and V8800 systems with the XPA-K amplifier architecture provides high shock performance as standard, built into the shaker design, eliminating the need for a matching transformer. The system meets demanding shock test specifications with sensibly sized payloads in standard configurations, ensuring the reliability and future proofing of LDS vibration test systems. The adjustable bay within the XPA-K amplifier allows you to maximize the setup for each new shock test profile, so the amplifier can upgrade from the standard 48 kVA or 64 kVA (V8800) to the more powerful 88 kVA amplifier if required.

Half sine shock performance

 

How do the LDS V8750 + XPA-K and the new LDS V8800 + XPA-K shaker systems improve uptime? 

Mechanical systems with moving parts need to be serviced and maintained to keep vibration test system performance and reliability at the highest level. To protect your investment and maximize uptime, HBK offers remote services as a new part of our service contracts to keep your system performing at its best.

New shaker systems, such as the V8800 and the V8750 are equipped with various sensors that continuously monitor the condition of the system. The data is available in real time via the amplifier’s touchscreen interface, and it is also stored in the amplifier for subsequent analysis to aid preventive maintenance and fault detection.

In addition, the system allows a connection for remote diagnostics and support from the HBK Service Team, via a customer LAN connection or via a 4G router connection to the HBK VPN server. Through customized service dashboards, based on the download and analysis of amplifier data, the HBK Service Team can assist with fault detection and diagnosis from anywhere.

Once an error is detected, you can make changes to the amplifier configuration via the touchscreen without the need for HBK Service to intervene, for example, changing modes, reducing the number of power modules used, changing limits. If more detailed analyses become necessary, optional remote access to the amplifier can also be provided – without having to be on site or to better prepare for necessary site visits. This remote-control software is also available for customers who wish to control and/or monitor the amplifier within the local network.

 

Both shaker systems come with a built-in inductive centring system. What is the benefit of that?

The inductive centring system also contributes to the improved uptime achieved by the new shaker systems, as it is maintenance-free and makes routine in-field service or calibration of the sensor a thing of the past.

The centring system of a shaker positions the armature within the shaker to ensure that the correct (maximum) amount of displacement can be achieved for the required vibration profile.

Typical armature sensors are based on optical technology as the technology is not impaired by the electromagnetic environment of a shaker’s armature. Optical technology, however, requires the constant recalibration and cleaning of the sensor due to its sensitivity towards dust or moisture common in test environments. This increases maintenance intervals and downtime, thus reducing efficiency. In the worst case, a malfunctioning sensor can also damage the entire shaker and the payload under test.

Although inductive sensors are not typically used because they cannot cope with the electromagnetic environment, the built-in inductive centring system (ICS) of the V8750 and V8800 shaker system uses inductive means in combination with other technology to make it immune to the effects of the electromagnetic environment.

The ICS automatically holds the armature in its centre position during a vibration test, ensuring that high displacement tests can be performed repeatedly and without accidental shutdowns due to interlock trips. This makes the ICS immune to the variables that can cause armature drift, such as dust and heat, offering greater reliability and giving you peace of mind during your vibration tests – completely maintenance-free!

 

What about energy consumption?

Vibration testing with a shaker consumes a lot of energy, which can significantly increase the cost of a test. The LDS XPA-K amplifier system features the so-called COOL mode built into the amplifier. It automatically adjusts the system settings to reduce the power consumption required for the test. The COOL mode can (also) be manually activated and deactivated on the amplifier’s touchscreen display, with estimated savings (kVA) and power (kVA and % of maximum power) displayed when activated.

The reduction in power consumption is achieved by monitoring temperatures via thermocouples direct on the armature and the shaker field coils, as well as the voltage and current required for the test.

Comparing the typical power savings of the LDS V875LS and the V8750, a significant reduction can be achieved with COOL mode. For example, at 25% operating power, power consumption can be reduced by 66%. Using your shaker annually at 25% operating power and an annual operating power ratio of 70%, this results in an annual saving of 162 MWh or 27.75 tonnes CO2 – an emission equivalent to 6.3 times a flight around the circumference of the earth or 14.8 times a flight from London to Sydney.

Energy savings v8800

 

Is it also possible to reduce acoustic noise?

Some automotive testing procedures, such as durability testing or squeak and rattle, can also be affected by the noise of the fan. In the QUIET mode, the system runs with the shaker fan off, minimizing the noise generated by the system and increasing the signal-to-noise ratio.

As the system runs without cooling during operation, the temperature of the shaker is monitored throughout the test to protect the system from overheating. If necessary, the fan can be switched on at the end of the test to quickly cool the shaker back down to ambient temperature.

The COOL and QUIET modes of the XPA-K amplifier system allow the adaptation of the fan speed and the field strength of the shaker to the respective test, which on the one hand significantly reduces the acoustic noise and, on the other hand, saves considerable operating costs depending on the test level. Please note that due to their specific characteristics, both modes can only be used separately.

 

Can I adapt the systems to my needs?

The V8750 is available with two possible armature sizes (440 or 640 mm diameter) on base-mounted air isolation or Lin-E-Air air isolated trunnions, and the XPA-K amplifier is available in 48 and 88 kVA variants. Based on the standard configuration, you can choose other options that are suitable for initial use, and there is the possibility to upgrade the capacity of your system later.

The V8800 system only has one available armature size of 440 millimeters but can also be equipped with two different XPA-K amplifiers with either 64 or 88 kVA. The shaker is available in various configurations from base-mounted to Lin-E-Air trunnion mounted or combo -mounted with an HBT slip table.

Choose from the following options to flexibly upgrade your system:

  • LDS® Head Expanders (guided and unguided) increase the effective mounting surface to accommodate larger or numerous payloads
  • LDS® Thermal Barriers/Extenders protect the shaker from high and low temperatures, enabling the use of climatic chambers during environmental testing. HBK works closely together with manufacturers of climatic chambers
  • LDS® Slip Tables are ideal when testing applications in three individual axes. Due to an underlying modular design, a future expansion of a vertical system to a combo system with slip table can be done on site.

In addition, HBK runs the vibration test systems with the right analysis and design software, as well as data acquisition hardware and software, which enable durability and reliability testing – simultaneously or independently:

  • HBK accelerometers and other transducers such as force transducers or strain gauges
  • LASERUSB controller for the shaker control
  • Data acquisition hardware and software, to monitor test specimens during the shaker test
  • LDS maintenance, calibration, repair, training, and maintenance contracts for your shaker system
  • HBK Prenscia software to design a representative test based on fatigue damage equivalence

 

Which applications are covered?

Both shaker systems are suitable for automotive and R&D testing companies. Common applications are component and sub-system durability testing, the testing of auto engines as well as electric vehicle (EV) battery cells and battery modules, buzz, squeak & rattle (BSR) testing of cockpit components, or the testing of nano and macro satellites and their components. General stress screening, including ISO 5344, HALT, ALT and HASS, along with product and package testing, such as ISTA and ASTM 4169 tests are also covered.

 

I still do not know which system is better for my needs, the V8800 or the V8750?

Both are great all-round vibration testing solutions, differentiated solely by their performance. The LDS V8750 has a peak sine force rating of 35.6 kN (8000 lbf), with the V8800 reaching 59.0 kN (13,250 lbf). When it comes to payloads, the V8800 medium shaker system will also take you just that little bit further and manage up to 700 kg, with the V8750 ending at 600 kg. This means that larger test objects, for example battery assemblies rather than just cells, can be handled by the V8800, whose higher force rating also covers more test requirements than the V8750.
Shakers and excitersLDS V8750
LDS V8800

In the end, the decision depends on your needs. Looking at the heritage products might also help. The V8800 is built onto the LDS bestselling V8 medium force shaker adding additional performance but also reducing cost with its eco-friendly operation mode. The shaker is extremely robust, offers zero-boost and a comparably lower acoustic noise output. As such, the V8800 is the best in its class.

The V8750 shaker system is the evolution of the LDS V875 medium-force shaker system, also improving performance while reducing the total cost of ownership with the maintenance-free ICS, remote services, and the COOL and QUIET modes. While it is less powerful than the V8800, the V8750 also requires less space.

Our sales team is also available to support your decision and supply you with the shaker system providing the best fit for both your vibration testing needs and your budget.