Sentek Dynamics’ PA Series replacement power amplifiers are available for most other vibration test equipment manufacturers obsolete, inefficient power amplifiers. The PA Series amplifiers are nearly twice as efficient as older air and water-cooled amplifiers and provide a significant savings in power consumption and electrical bills. So significant, in fact, that the savings can offset the cost of a replacement amplifier in a very short period.
This past week, the Sentek Dynamics’ Field Service Team completed installation of Sentek Dynamics’ third-largest water-cooled electrodynamic shaker! This extra-high force Model E20064A shaker with a PA4200 power amplifier offers a rugged and proven solution for large payloads and demanding testing requirements. It will be used by an exciting new leader in energy generation for product development and qualification testing.
Modal Testing is carried out to understand the dynamic behavior of structures. The procedure is to excite the structure or device under test (DUT) with a force of known frequency and amplitude. The response is then analyzed by measuring the output of strategically placed accelerometers. Using the data acquired from the accelerometers, a modal model of the structure or DUT can be constructed. From the derived model, modal parameters, including resonant frequencies, mode shapes, and damping values can be determined.
Sentek Dynamics offers head expanders for applications where larger mounting surfaces are required for vertical vibration testing. Head expanders with load support and guidance options increase the payload capacity without damaging the shaker armature and suspension system. The hydraulic lift option is an additional option which eases the lifting and lowering of the head expander to facilitate shaker rotation. The system utilizes hydraulic cylinders to raise the load support structure and significantly reduces the setup time between vertical and horizontal tests and vice versa.
Underwriters Laboratories (UL) has long been recognized as a safety consulting and certification company. With help from Sentek Dynamics, the new state-of-the-art UL facility in Allentown, PA offers high-end reliability testing for products of all kinds. These include electronic components, building products, industrial control equipment, plastic materials, and much more.
Sentek Dynamics is pleased to announce its extensive product offering of high quality, lab grade permanent magnet shakers for “desktop” and “modal” vibration testing applications. Sentek Dynamics’ permanent magnet shakers are based on years of vibration testing experience and offer a proven solution to demanding vibration testing requirements.
Sentek Dynamics is the leader in the field of single and multi-axis electrodynamic shakers. Sentek Dynamics’ product line includes air and water-cooled single axis and simultaneous three-axis shakers in a broad choice of forces. The simultaneous three-axis shakers bring real-world vibration environments to test laboratories.
Sentek Dynamics’ Mini “Combo” Shaker & Controller Kit The Sentek Dynamics’ Mini “Combo” Shaker is a small, portable 20 N (4.5 lbf) permanent magnet shaker with an integral power amplifier. The design eliminates the need for a separate, inconvenient power amplifier and attendant cables. The drive signal from most vibration controllers and signal generators can be directly connected to the BNC connector on the body of the shaker.
Sentek Dynamics’ mini “combo” shaker can be ordered with an optional slip table. The trunnion design allows the mini-shaker to be rotated and locked for testing in any of three axes.
Small satellites, more commonly known as CubeSats, have gained popularity because of their miniature size and their data acquisition techniques. These satellites are being launched at a record pace and have roped big players into this aerospace segment. Astro Digital is a company that risen to the challenge of land mapping and hazard detection using CubeSats.
The 2017 Automotive Testing Expo provided a full display of Sentek Dynamics’ latest environmental testing capabilities. Not only was a simultaneous 3-axis vibration test system on display, it was paired with a Crystal Instruments Spider-81 multi-axis capable vibration controller as well.
Sentek Dynamics is pleased to announce the opening (effective July 2017) of its first Russian office. Located in the city of St. Petersburg, Russia, Sentek Dynamics chose this site due to its unique combination of both culture heritage and industrialized technology subdivisions.
This past month (June 20th, 21st, and 22nd) Sentek Dynamics along with controller company Crystal Instruments attended the European Automotive Testing Expo in Stuttgart Germany. Over 6,000 attendees came out to visit more than 300 exhibitors. There was a wide variety of testing equipment displayed at each of the exhibits; it ranged from virtual-reality driving simulators to test and measurement devices including temperature chambers, shakers, and vibration controllers. Sentek Dynamics and CI together showcased the largest of their L-Series shakers along with a Spider-81 Vibration Controller.
Recently, the Sentek Dynamics Team commissioned a Sentek Dynamics THV Series AGREE Chamber* at a major US aerospace company. An identical chamber is scheduled to be commissioned at the company’s Canadian facility in August 2017.
ASTM transportation tests (such as ASTM D4169) are commonly used to simulate vibrations induced by the shipping of containers via truck, air, and rail. Often times these tests require very low level random vibration profiles which can be hard to run and control. On top of that, many of the profiles begin as low as 1 Hz, which can cause problems as well.
Electro-dynamic shakers are by nature robust and durable pieces of testing equipment. Frequently, they are not given much thought until a problem arises. When these problems do happen, they can be costly; not only monetarily but also in lost labor hours and downtime. Regularly scheduled preventative maintenance programs can help prevent unexpected problems and maintain peak testing performance.
The phrase “Good things come in small packages” is true! Small satellites, also known as CubeSats, are being launched at a record pace with the successful February 15, 2017 launch of 104 satellites of which 88 were Planet Labs’ Dove satellites collectively known as Flock‐3p, aboard an Indian Space Research Organization (ISRO) Polar Satellite Launch Vehicle (PSLV) rocket from the Satish Dhawan Space Center in Sriharikota, India. This amazing launch followed the successful June 22, 2016 launch of 12 Planet Labs’ Flock‐2p satellites from the Satish Dhawan Space Center. These spacecraft are shoebox‐sized satellites placed into lower Earth orbit to provide imaging data.
The Sentek Dynamics team enjoyed meeting attendees at the 2016 Automotive Testing Expo in Novi, Michigan. Visitors stopping by the booth were able to preview a complete vibration test system provided by Sentek Dynamics.