What it is

The LDS V994 is a high-force, water-cooled electrodynamic shaker rated at 65,000 lbf (289.1 kN) sine force and 60,000 lbf (266.9 kN) random force, for vibration and shock testing of very large payloads. A 29.9 in (760 mm) armature pairs a high-performance armature design with water-cooled coils to deliver 75 g sine acceleration, 74.8 in/s (1.9 m/s) velocity, and 2.0 in (50.8 mm) of continuous displacement. An automatic armature and body position load compensation system handles larger loads, and the internal load support carries up to 11,023 lb (5,000 kg). The shaker is driven by the LDS DPA-K amplifier range, up to the DPA 280K, and has been used in single- and multi-shaker configurations to test products such as satellites and missiles.

• Sine force: 65,000 lbf (289.1 kN) peak
• Random force: 60,000 lbf (266.9 kN) rms
• Half-sine shock force: 130,129 lbf (578.8 kN)
• Acceleration: 75 g sine peak; 60 g random rms
• Velocity: 74.8 in/s (1.9 m/s) sine peak, full field
• Displacement: 2.0 in (50.8 mm) peak-to-peak, continuous
• Usable frequency range: DC to 1.7 kHz
• Internal load support: 11,023 lb (5,000 kg)
• Amplifier: LDS DPA-K range, from 90/140K to 280K

What it is used for

Some of the use cases for the LDS V994 include:

• 3-axis testing of complete satellite systems: full-system vibration testing in single- or multi-shaker setups.
• Avionics and military hardware testing: qualification of avionics, missiles, and defense systems.
• Structural dynamics testing: high-force excitation of very large structures.
• Clean room environments: vibration testing where contamination control is required.
• The heaviest test articles: payloads up to 11,023 lb (5,000 kg) on the internal load support, the highest in the LDS range.
• Multi-shaker, multi-axis applications: combining several shakers to drive very large payloads.

Key features

• Water-cooled coils: a high-performance armature design combined with water-cooled coils delivers strong acceleration and velocity performance.
• Automatic load compensation: an automatic armature and body position load compensation system accommodates larger loads.
• Very large armature: 29.9 in (760 mm) diameter, with M12 or 1/2 UNC inserts as standard.
• Nine amplifier configurations: the DPA-K range runs from 90 to 280 kVA in 8 kVA increments, so force can be sized to the test program.
• Lin-E-Air trunnions: standard, with a body rotation gearbox for vertical or horizontal operation. Solid trunnions are available on request.
• Very stiff suspension: 410,000 lbf/in (71.8 kN/mm) cross-axial and 94.7 × 10⁶ lbf·in/rad (10,700 kN·m/rad) rotational stiffness.
• Low gauss option: reduces stray magnetic field from 20 gauss (2.0 mT) to 3 gauss (0.3 mT).
• Options: combination shaker/slip table base, chamber support kit, and thermal barrier.

Why engineers pick it

65,000 lbf sine force. 65,000 lbf (289.1 kN) sine and 130,129 lbf (578.8 kN) half-sine shock with the DPA 280K-TC.

Scales with the amplifier. Nine DPA-K configurations run from 30,100 lbf (133.9 kN) with the DPA 90/140K-DC up to the full 65,000 lbf (289.1 kN).

Built for the heaviest payloads. 11,023 lb (5,000 kg) of internal load support and 410,000 lbf/in (71.8 kN/mm) cross-axial stiffness keep very large test articles on-axis.

Proven on large programs. The V900 series has been used in single- and multi-shaker configurations to test satellites and missiles.

The V994 system

• LDS DPA-K amplifier: a control bay plus power bays, from 90 to 280 kVA in 8 kVA increments.
• Field power supply (FPS) and cooling unit: field power and raw-water cooling for the shaker coils.

Site requirements

• Power: maximum required input is 244.59 kVA for the amplifier and 169.63 kVA for the FPS and cooling unit.
• Compressed air: 100 psi (6.88 bar).
• Raw water: the cooling unit uses up to 55 gal/min (209 L/min) at maximum capacity, with a maximum inlet temperature of 90 °F (32 °C).
• Ambient: amplifier, FPS, and cooling unit 41 to 104 °F (5 to 40 °C).
• Acoustics: 105 dBA shaker, up to 90 dBA amplifier, and 75 dBA FPS and cooling unit at 6.6 ft (2 m).

Configuring and scaling

Select the V994 configuration on this page and use Request Quote to start your system. Contact W5 for items the selector doesn't cover:

• Amplifier: DPA-K configuration.
• Trunnions: Lin-E-Air or solid.
• Armature inserts: thread choice.
• Other options: low gauss option, combination shaker/slip table base, chamber support kit, and thermal barrier.

For a lighter high-force system, the LDS V984 delivers 36,000 lbf (160.1 kN) on a 23.25 in (591 mm) armature.

Get the V994 specified, installed, and supported

W5 Engineering is the authorized North American distributor for LDS / Brüel & Kjær. We configure the V994 to your force, acceleration, and payload targets — amplifier configuration, trunnions, and cooling — then install it and support it. One PO covers the shaker, amplifier, cooling unit, ancillaries, and commissioning. Contact us with your test profile and we will return a configuration recommendation and quote.