by Dept. of Aerospace Engineering, College of Engineering & Technology, Old Dominion University, National Aeronautics and Space Administration, National Technical Information Service, distributor in Norfolk, Va, [Washington, D.C, Springfield, Va .
Written in English
|Statement||by Lucas E. Foster and Colin P. Britcher, principal investigator.|
|Series||NASA contractor report -- NASA CR-197801.|
|Contributions||Britcher, Colin P., Old Dominion University. College of Engineering and Technology., United States. National Aeronautics and Space Administration.|
|The Physical Object|
|Pagination||viii, 121 leaves|
|Number of Pages||121|
The Large Angle Magnetic Suspension Test Fixture is a five degree-of-freedom system, developed and built at NASA Langley Research Center. It is intended for study of control techniques in magnetic. Extension to the dynamic modeling of the large angle magnetic suspension test fixture. June Lucas E. Foster; Colin Britcher; The Large Angle Magnetic Suspension Test Fixture . Large angle magnetic suspension test fixture. By Colin P. Britcher. Abstract. Over the past few decades, research has proven the feasibility of the concept of noncontacting magnetic bearing systems which operate with no wear or vibration. As a result, magnetic bearing systems are beginning to emerge as integral parts of modern industrial and Author: Colin P. Britcher. The large-angle magnetic suspension test fixture. As part of a NASA effort to develop the technology and techniques required to demonstrate the magnetic suspension of objects over wide ranges of attitudes, a small-scale demonstration project was undertaken. and to permit controlled rotation of the model in one degree-of-freedom over.
dynamic magnetic losses. The maximum strain and largest hysteresis loop area are seen at a frequency near resonance ( Hz), indicating a phase angle of about − As the frequency increases beyond resonance, the strain magnitude diminishes rapidly accompanied by further delay of the phase angle. and more advantages than the air, hydraulic suspension. The hydraulic and air suspension have leakage problem and which is dangerous for any suspension system because of that big reason magnetic suspension system were used. 3. DESIGN Design of main spring: The spring is mounted in between two magnets to avoid impact of magnets. The distinction between static testing and dynamic testing is not simply the speeds involved. There are often cases where a 'static' test will require a higher test speed than a 'dynamic' test. The distinction is actually in the nature of the information we need to obtain from the test. When the suspension system is designed, a 1/4 model (one of the four wheels) is used to simplify the problem to a 1-D multiple spring-damper system. A diagram of this system is shown below. This model is for an active suspension system where an actuator is included that is able to generate the control force U to control the motion of the bus body.
ICRApaper-list. Welcome to ICRA , the IEEE International Conference on Robotics and Automation. ICRA is the largest robotics meeting in the world and is the flagship conference of the IEEE Robotics & Automation Society. Abstract: The traditional modeling methods on suspension force of magnetic bearings are mainly based on static fields analysis, and lack of consideration for the effect of real-time temperature and rotation speed. However, the action area of Maxwell force and the air gap size in the calculation formula of the suspension force dynamically change. Approaches to control of the large angle magnetic suspension test fixture (OCoLC) Microfiche version: Ghofrani, Mehran. Approaches to control of the large angle magnetic suspension test fixture (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type. The work intends to define a simple (force/current) model of the EMA, which is necessary to obtain a linear action line. To identify the model, a test rig was designed and manufactured. Investigations are performed to determine the influence of oil, .