Forestry
Forestry is the art and science of managing forests, tree plantations, and related natural resources. Modern forestry generally concerns itself with: assisting forests to provide timber as raw material for wood products.
Forestry Products:
Forestry
Sine-On-Random Vibration Control
Sine-on-random (SoR) control simulates complex vibration environments with a combination of broadband random excitation and sinusoids or 'tones'. Generally, both signal types are present simultaneously and the tones may either appear at fixed frequencies or sweep over a frequency range. A typical example is the vibration from an automobile drive
Time Waveform Replication Vibration Control
Time waveform replication (TWR), also known as long time history (LTH), exactly replicates, in the laboratory, vibration environments using data obtained in the field. Field measurements, such as a vehicle’s road test or an aircraft flight run, can be imported into the host PC, compensated for suitability to the shaker
Resonance Search, Track And Dwell Vibration Control
Resonance search, track and dwell (RSTD) is an invaluable test for automated fatigue testing. A sine sweep is used to detect the resonant frequencies of the device under test (DUT). The test then dwells upon these frequencies for a specified period or number of cycles, automatically tracking changes in resonance
Transient Time History Vibration Control
Transient time history (TTH) allows the user to simulate real-world shock transients based upon actual field measurements. Transients are short-lived vibration events characterized by waveforms that start with relatively high amplitudes that quickly dampen out. Compensation can be applied to ensure the generated waveform is compatible with the target shaker
Classical Shock Vibration Control
Classical shock control creates a series of pulses to excite the device or structure under test, measures the structure’s response and performs a spectral analysis to determine its response and resonance characteristics. This type of testing profile offers higher accuracy and repeatability than regular drop-test methods. USE SCENARIOS Shock testing
Random Vibration Control
The random vibration (or excitation) test profile simultaneously excites all resonant frequencies of any given payload, thus it is well suited for product qualification tests and for characterizing a structure’s dynamics. A fast loop time is important for high accuracy, and so are multi-channel control, notching, and real-time analysis. USE
Sine Vibration Control
Sine control creates excitation with analog-quality drive signal and user-programmable sweep parameters. This test profile is particularly useful for studying the structural dynamics of the device under test, as it enables accurate measurement of dynamic response at resonances. Since sine control concentrates all the vibration energy at a single frequency,
Type 4810 Mini-Shaker
Designed using permanent-magnet technology to deliver excitation, this palm-sized unit is suitable for a number of research and educational applications, including structural response testing and vibration transducer and accelerometer calibration. This miniature exciter has a frequency range from DC – 18 kHz and maximum peak-to-peak displacement of 4 mm (0.16
Type 4808 Permanent Magnet Vibration Exciter
Versatile and dependable, Type 4808 incorporates a design based on magnetic-alloy technology to produce excitation. This exciter is suitable for a variety of research and educational applications that include vibration testing of small objects, measuring mechanical impedance and studying structural response. Type 4808 has a wide frequency range (5 Hz
Type 4809 Vibration Exciter
This benchtop unit offers versatility and dependability for a range of applications, including mechanical impedance and mobility measurements and accelerometer calibration. Type 4809 features a wide frequency range (10 Hz – 20 kHz) and a continuous displacement of 8 mm (0.32 in) peak-to-peak. It can impart 45 N (10 lbf)
Type 2718 Power Amplifier
While Power Amplifier Type 2718 is specifically designed to drive our Type 4809 exciter, it is also suitable for use with other small shakers for reverberation measurements and other applications. USE SCENARIOS Driving Measurement Exciter Type 4809 Safely driving Measurement Exciter Type 4810 to its full rating (by limiting current output) Supplying
Type 2721 Power Amplifier
Power Amplifier Type 2721 has been designed specifically to drive our Modal Exciter Types 4826, 4827 and 4828; however, this amplifier can also be used with other units as it features an adjustable RMS output-current limit. USE SCENARIOS Safely driving Modal Exciter Types 4826, 4827 and 4828, to their full ratings Driving
Type 2720 Power Amplifier
Designed specifically to drive our Type 4825 modal exciter, this amplifier has an adjustable RMS output-current limit that enables it to work with lower-force shakers. USE SCENARIOS Driving Measurement Exciter Type 4825 Driving any modal or vibration exciter that requires a 500 VA power amplifier Powering DC Static Centering Unit Type 1056
TYPE 2719 Power Amplifier
Specifically designed to drive our Type 4808 exciter, this amplifier features an adjustable RMS output-current limit, so that it can be used with smaller shakers. It has a frequency range from DC to 100 kHz and a 14 dB maximum voltage gain. USE SCENARIOS Driving Permanent Magnet Vibration Exciter Type 4808 Safely
LDS SPA-K Power Amplifiers
Similar to the LDS® DPA-K range, these switching power (or switch-mode) amplifiers have been designed to power our medium-force vibration test systems. They have a Class-D rating, offering maximum power with minimal energy waste and, thus, lower running costs. Compatible with third-party shakers, LDS® SPA K amplifiers are modular and scalable, allowing you to
LDS HPA-K Power Amplifier
Featuring the same power module, microprocessor and LCD as the LDS® SPA-K range, this amplifier has been optimized to drive our low-force shakers LDS® V650 and V780 shakers, enabling them to impart higher forces than when paired with other units. With a Class-D rating, it offers maximum power with minimal energy waste and lower running
LDS SPA-K Replacement Amplifiers
These units are intended to replace discontinued LDS® amplifiers that were used to drive older air-cooled shakers, whether LDS or other. Brüel & Kjær offers a wealth of experience in designing power amplifiers to match most shakers available or in operation today. This includes supplying amplifiers to meet the requirements for
LDS LPA Linear Power Amplifiers
Compact and efficient, these stand-alone units are designed for driving our permanent magnet shakers, as well as our low-force shakers, when operated with a separate LDS® FPS Field Power Supply. LDS linear power amplifiers offer low-noise, low-distortion performance and are available in three models, LPA100, LPA600 and LPA1000. USE SCENARIOS Driving LDS permanent magnet
LDS DPA-K Power Amplifiers
Specifically designed to supply LDS® V900 high-force shakers with the signal they require to perform at optimal levels, these amplifiers combine strength, efficiency and adaptability. Featuring a Class-D rating, they deliver maximum power with minimal energy waste and lower running costs. Compatible with third-party vibration systems and suitable for multi-shaker applications,
LDS Fixtures Head Expanders And Thermal Barriers
Part of many vibration test systems, a head expander consists of a large platform that is bolted to the shaker’s load table to increase its effective mounting surface and enable it to test larger or more numerous payloads than those that can be attached to the load table alone.A thermal