2 edition of Development of magnetostrictive active members for control of space structures found in the catalog.
Development of magnetostrictive active members for control of space structures
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va
Written in English
|Statement||prepared by Bruce G. Johnson.|
|Series||[NASA contractor report] -- NASA CR-190846., NASA contractor report -- NASA CR-190846.|
|Contributions||Johnson, Bruce G., United States. National Aeronautics and Space Administration.|
|The Physical Object|
A modified α-LMS algorithm is presented and is applied to the controller design of active vibration control. A magnetostrictive material actuator is used as experimental equipment for active vibration control in this paper. The merit of the presented method is that it is not necessary to build the mathematical model of magnetostrictive : Zhao Qing Song, Shao Lei Zhou, Xian Jun Shi, Guo Qiang Liang. Multifunctional active noise reduction structures can have many concurrent functions such as active sound absorption, active sound insulation and active sound radiation control. Related research based on PVDF thin films and Sonopanel composite structures, resulted in the development of active acoustic structures for underwater by: 9.
The United Nations Conference on Sustainable Development (Rio+20) reaf-firmed commitment to sustainable development and adopted a framework for action and comprehensive follow-up. The World Economic and Social Survey serves as a valuable resource as we look towards translating the outcome of Rio+20 into concrete Size: 2MB. A heuristic iterative learning control (ILC) design scheme is presented and is applied to the controller design of the active vibration control. A magnetostrictive material actuator is used as experimental equipment for active vibration control in this paper. The merit of the presented ILC scheme is that it is not necessary to build the mathematical model of the magnetostrictive Cited by: 1.
This Public–Private Partnership (PPP) Handbook is designed for the staff of the Asian Develop-ment Bank (ADB) and its developing member countries’ clients. It provides an overview of the role, design, structure, and execution of PPPs for infrastructure development. Handbook of Giant Magnetostrictive Materials contains the knowledge that a mechanical or an electrical engineer needs when considering the use of magnetostrictive materials in a construction project. The book covers the physical origin of giant magnetostriction, its manufacturing and metallurgy, and grain related processes under operation.
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Get this from a library. Development of magnetostrictive active members for control of space structures. [Bruce G Johnson; United States. National Aeronautics and Space Administration.;]. The active members must control structural motion to the sub-micron level and, for many proposed space applications, work at cryogenic temperatures.
Under this program both room temperature and cryogenic temperature magnetostrictive active members were designed, fabricated, and by: 3. One of the most frequent applications of magnetostrictive actuator technology is the active structural vibration control (AVC).
Magnetostrictive actuators (MAs) can deliver high-output forces and can be driven at high frequencies. These characteristics make them suitable for a variety of vibration control by: The magnetostrictive layer produces the actuating force required to control the vibration in the beam, based on a negative velocity feedback control law.
The control input is the current to the solenoid surrounding the by: A self-sensing magnetostrictive actuator design based on a linear systems model of magnetostrictive transduction for Terfenol-D is developed and analyzed.
Magnetostrictive sensor for active health monitoring in structures Hegeon Kwun,* Glenn M. Light, * Sang-Young Kim, and Robert L. Spinks Applied Physics Division, Southwest Research Institute™ ABSTRACT A flat magnetostrictive sensor for active health monitoring of a large area of a structure has been developed.
The sensor. Magnetostrictive materials exhibit coupling between magnetic and mechanical energies. This bidirectional energy exchange can be employed for actuation, sensing, and energy harvesting.
All ferromagnetic materials exhibit the magnetostrictive effect, but only certain iron–rare earth alloys, iron–gallium alloys. Magnetostrictive delay lines (MDLs) have been employed as the sensing elements, due to their fibrous form and minimal thickness, which allows integration in textile and clothing products.
Magnetostrictive displacement/position sensor. Overview Magnetostrictive displacement (liquid level) sensor is a sensor which measures product’s displacement through accurately measuring the absolute position of the moveable position magnet ring with inner non-contact observation and control technology.
Because of its high-accuracy and reliability, this sensor. Magnetostrictive sensors take advantage of the efficient coupling between the elastic and magnetic states of a material to facilitate sensing a quantity of interest.
Magnetic and magnetostrictive theory pertinent to magnetostrictive sensor technology is provided. The paper details the development of a Terfenol-D microactuator, based on the expertise and FEA. The experimental results show that the microactuator has some level of hystersis, and that it produces 25 N in force and 3 μm in displacement for A of current, with a displacement resolution of nm per by: As Magnetostrictive Level Transmitter gives direct signal output, additional output interface is not needed.
As the resolution is very accurate and reliable, it will reduce the malfunction of the product. Moreover, due to the durability of the sensing element, lifespan is exceptionally long.
Minimal maintenance is needed, thus stockingFile Size: KB. GMM are a class of smart materials and which are used mostly as actuators for active vibration control. Magnetostrictive actuators can deliver high ouput forces. Multi-freedom magnetostrictive smart structure are considered, which consists of TbDyFe alloy magnetostrictive actuators and applied to active vibration control.
In this paper two degree of freedom (DOF) and six DOF smart structures are discussed. To control the smart structure, a real time computer control system is : Jianqin Mao, Chao Li, Zhen Zhang, Chengbao Jiang, Lin li.
Multiple degree-of-freedom (DOF) vibration isolation is essential for precision control of space-borne structures and weapon systems. A new design and analysis of actuators employing magnetostrictive material TbDyFe is by: 1.
and the position magnet is attached to the member that will be moving. The head includes an electronics module, which reports the position information to a controller (or other receiving device) in the appropriate analog or digital format.
Figure 1:Magnetostrictive Linear-Position sensor with sensing rod and position magnet. Motion Axis Sensing RodFile Size: KB.
Giant Magnetostrictive Materials The magnetostrictive materials exhibit a strain caused by the orientation of the magnetic moment when exposed to a magnetic field.
A new class of magnetostrictive materials discovered by Ullakko et al. (, ) is called Magnetic Shape Memory (MSM) alloys or Ferromagnetic Shape Memory Alloy (FSMA) materials. The magnetostrictive properties of cubic Laves phases such as TbFe 2, Terfenol D and SmFe 2 are summarised.
It is shown that SmFe 2 can be an interesting candidate as a high magnetostrictive material even in the as cast "dirty" state. Fe-X alloys based on Fe-Ga but also Fe-Al are presented as materials with a medium magnetostriction, however with the big.
Magnetostrictive level transmitters charge a magnetostrictive element with electric current. When the element's electromagnetic field intersects the float's magnetic field, a mechanical pulse is.
One of the characteristics not to be ignored of the magnetostrictive material used in active vibration control is its hysteresis. In this paper this characteristic has been studied. At first a mathematical model of the hysteresis loop has been obtained on the basis of experiment.
This model depends on the frequency and the amplitude of the alternating current inputted to magnetostrictive Cited by: 1.
Won-jong Kim, Senior Member, IEEE, Member, ASME, and Ali Sadighi, Student Member, IEEE. frequency transducers, and sp.
Abstract Design and relay-based control of a novel linear magnetostrictive motor is presented in this paper. The magnetostrictive material used here is Terfenol-D, an alloy of the formula Tb. Dy. Fe. Design and Application of Magnetostrictive “MS” Materials A.
G. Olabi and A. Grunwald Dublin City University, School of Mechanical and Manufacturing Engineering, Glasnevin, Dublin 9, Ireland, Email: @ Abstract: Magnetostriction is the change in shape of materials under the influence of an external magnetic Size: KB.
Nowadays, with the invent of “giant” magnetostrictive alloys, it is being used in making devices like high force linear motors, positioners for adaptive optics, active vibration or noise control systems, medical and industrial ultrasonic, pumps, and so on.