TECHNOLOGY & PATENTS:
Vibration Control by Confinement (VCC)
Energy Flow Control (EFC)
USA and International Patents
- 14 years of government and commercial projects
- 13 U.S. and international patents
- Expertise in noise/vibration/acoustics/shock analysis and control
- Capabilities in modeling simulation and analysis
- Capabilities in testing and evaluation
- Capabilites in field data collection and analysis
- Ability to secure government funds for R&D projects ($2.5 billion funding pool)
- Ability to secure sole source phase 3 awards
Publications
Abstract
Title: Shock and Vibration Reduction by Diversion and Confinement of Energy
Author: Daryoush Allaei (QRDC, Inc.), David Tarnowski (QRDC, Inc), Allen Arndt (LMTDS), Noel Allen (LMTDS), and Anthony Pazcuzzi (PDA)
Cost effective and reliable shock and vibration reduction methods suitable for shipboard enclosures containing electronic components have been of interest to the US Navy. In particular, if enclosures contain mission and/or safety critical electronic components, it is vital that the shock and vibration levels are reduced to their minimum value. Furthermore, with the current trend toward inclusion of COTS in the military vehicles, the need for significant reduction of shock and vibration levels has increased. Today's common practices to reduce shock and vibration levels of enclosures are based on the use of a set of passive mounts with appropriate stiffness and damping properties. In this case, the idea is to take out the injected shock or vibration energy via the mounts damping while the stiffness of the mounts usually contributes to the reduction of displacements and tuning of the system resonances. In other words, the current mounts act as mechanical filters. However, a certain amount of energy goes through the mounts and reaches the electronic cabinet regardless of the mounts used. Such excess energy is then trapped within the enclosure and may cause catastrophic failures and/or fatigue and wear type damages. An innovative and novel concept to passively divert and confine such excess energy away from the electronic cabinet is presented here. The diversion/conferment approach is based on the passive version of a new technology, namely Vibration Control by Confinement, developed by the first author. In recent years, it has been shown that, for certain classes of structures, a shock/vibration reduction approach based on vibrational energy confinement may address some of the above issues and significantly improve the overall benefits of the shock/vibration reduction systems. Based on the recently published work, it is concluded that the concept of vibration control by confinement can overcome some of the shortcomings in the present passive and active shock and vibration control technologies. The latter has been demonstrated under laboratory conditions in several recent papers. It will be shown that the passive diversion/conferment approach works with a variety of mounts. Based on the preliminary results obtained via a FEM-based model, it is shown that additional 30 to 45% shock and vibration reductions are possible. A small scaled test article is being fabricated and will be used to verify the model generated results. The details of the model-based and test-based results will be presented in the symposium.
Abstract
Title: Shock and Vibration Reduction by Diversion and Confinement of Energy
Author: Daryoush Allaei (QRDC, Inc.), David Tarnowski (QRDC, Inc), Allen Arndt (LMTDS), Noel Allen (LMTDS), and Anthony Pazcuzzi (PDA)
Cost effective and reliable shock and vibration reduction methods suitable for shipboard enclosures containing electronic components have been of interest to the US Navy. In particular, if enclosures contain mission and/or safety critical electronic components, it is vital that the shock and vibration levels are reduced to their minimum value. Furthermore, with the current trend toward inclusion of COTS in the military vehicles, the need for significant reduction of shock and vibration levels has increased. Today's common practices to reduce shock and vibration levels of enclosures are based on the use of a set of passive mounts with appropriate stiffness and damping properties. In this case, the idea is to take out the injected shock or vibration energy via the mounts damping while the stiffness of the mounts usually contributes to the reduction of displacements and tuning of the system resonances. In other words, the current mounts act as mechanical filters. However, a certain amount of energy goes through the mounts and reaches the electronic cabinet regardless of the mounts used. Such excess energy is then trapped within the enclosure and may cause catastrophic failures and/or fatigue and wear type damages. An innovative and novel concept to passively divert and confine such excess energy away from the electronic cabinet is presented here. The diversion/conferment approach is based on the passive version of a new technology, namely Vibration Control by Confinement, developed by the first author. In recent years, it has been shown that, for certain classes of structures, a shock/vibration reduction approach based on vibrational energy confinement may address some of the above issues and significantly improve the overall benefits of the shock/vibration reduction systems. Based on the recently published work, it is concluded that the concept of vibration control by confinement can overcome some of the shortcomings in the present passive and active shock and vibration control technologies. The latter has been demonstrated under laboratory conditions in several recent papers. It will be shown that the passive diversion/conferment approach works with a variety of mounts. Based on the preliminary results obtained via a FEM-based model, it is shown that additional 30 to 45% shock and vibration reductions are possible. A small scaled test article is being fabricated and will be used to verify the model generated results. The details of the model-based and test-based results will be presented in the symposium.
125 Columbia Court, Suite 6, Chaska, MN 55318
phone 952.556.5205 | fax 952.556.5206
email arash@qrdc.com
phone 952.556.5205 | fax 952.556.5206
email arash@qrdc.com