Tue, Jul 3, 2012
Mechanical Vibration and Shock issues pose significant challenges to many industries. Including the Automotive, Defense, and Military fields. The development of robust products that can be exposed to long term vibration exposure or periodic shocks without degradation is critical to the overall performance of any system. As is the case with many product design approaches, the ability to evaluate parts or smaller systems on a component level basis is vital to the overall development process.
Early and Realistic Evaluation Helps Design
The evaluation of components early in the design process is a key part of the overall development cycle. From an automotive standpoint, OEM’s work with suppliers to establish the vibration/shock environments that components will experience in the field. In many cases, data is collected with early prototype or pre-production vehicles. This data is then utilized to form the basis for tests to simulate a lifetime of exposure. For other industries, there is little to no opportunity to evaluate performance in the final end-stage application. For example, it is not feasible to test many of the components for space vehicles in a full scale manner; i.e. launching them into orbit to test whether they work prior to the official launch. So, the components themselves must be exposed to an environment which simulates the launch conditions as the actual launch may be the first and only exposure.
Innovative Approaches to Shock Events
Over the years, MGA’s team has developed new ways to simulate the high amplitude shock events that are present in various applications. These approaches have been the result of MGA’s strong collaboration between our laboratory personnel and our equipment team. The approach implemented is to draw upon the technologies that have been developed at MGA in the areas of new sled designs, pyroshock devices, dynamic impactors, and large-scale drop towers. In many cases, these approaches have been combined to produce the desired acceleration shock pulses. A few recent examples include the following:
Battery Shock Testing
MGA is currently in the final stages of development of a new shock system designed for evaluating large format batteries. These systems are based upon advanced impactor technologies developed over the years by MGA. These systems can be operated in the horizontal and vertical shock modes. The units have been sized so that they fit into a battery containment chamber. Many of these chambers have been commissioned throughout various MGA facilities as the need for evaluating of experimental battery testing has grown.
Horizontal Blast Simulation
Recently, MGA engineers tackled the challenge of simulating the blast shock event of an IED exploding on the side of a military vehicle and producing a very high acceleration/short duration pulse on side mounted seats. MGA’s newly developed mini-sled application was utilized to produce the shock with all of the components in the correct, in-vehicle orientation. This new application complements the vertical based blast simulation testing that MGA has been conducting for many years.
MGA has been conducting Pyroshock testing for many years. This type of testing simulates the conditions evident when a space vehicle or missile is launched. Accelerations of up to 10,000 g’s are sometimes seen in these events. Over the years, MGA has developed new devices and procedures to be able to match a very wide range of pyroshock environments.
Recently, MGA has developed a system to simulate the dynamics of the tire-curb impact. The facility that was brought on-line is a hydraulic based system with advanced, high flow servo valves and state-of-the art control. The system is tunable so that a wide range of curb impact events can be simulated.
Traditional Vibration and Shock Solutions
For the automotive, aerospace, and defence industries, electrodynamic shakers are utilized extensively to evaluate components over a wide range of acceleration levels and frequency ranges. These systems are used to test products from both a vibration durability approach and simulated, repeated shock exposures. Over the years, various standardized procedures have been developed for specific types of components. In regards to ED shaker capabilities, MGA offers test services out of its network of laboratories. A wide range of shakers are available; with force ratings up to 20,000 lbs. All of the systems are integrated with environmental chamber capabilities so that components can be simultaneously exposed to vibration and extreme temperature cycling.
MGA also offers a comprehensive range of options with regards to custom fatigue/vibration solutions utilizing closed-loop servo hydraulic technology. Systems have been developed to apply higher frequency, multi-point loads on complex structures to simulate particular real-world applications. MGA offers customers significant facilities combined with highly experienced, expert personnel to tackle complex, multi-load test cases.
Overall, MGA offers numerous, state-of-the-art solutions to your vibration and shock needs. If you are interested in learning more about these capabilities, please contact Andy Gould at (248) 577-9810 or by email at email@example.com.