by National Aeronautics and Space Administration, Lewis Research Center in [Cleveland, Ohio .
Written in English
Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1986. 1 microfiche.
|Statement||Kenzou Nonami and David P. Fleming.|
|Series||NASA technical memorandum -- 87232.|
|Contributions||Fleming, David P., Lewis Research Center.|
|The Physical Object|
The active vibration control of the flexible rotor by applying control forces on the bearing housings has been investivated by several researchers. Moore et al.  and Lewis et al.  analyzed controlled flexible rotors using transfer by: Such constraints must be considered to ensure both a cost effective design and system integrity in the event of component failure. This paper presents the first stage of a theoretical examination of active control by investigating a mathematical model of a three-mass flexible rotor symmetrically supported on flexibly mounted journal by: Active vibration control is the active application of force in an equal and opposite fashion to the forces imposed by external this application, a precision industrial process can be maintained on a platform essentially vibration-free. Many precision industrial processes cannot take place if the machinery is being affected by vibration. The active vibration control was tested with the use of a test rig, which consists of a rotor supported by two controllable journal bearings and driven by an inductive motor up to 23, rpm. As it was proved by experiments the active vibration control extends considerably the range of the rotor operational speed.
Many researchers have explored the use of active bearings, such as non-contact Active Magnetic Bearings (AMB), to control imbalance vibration in rotor systems. Meanwhile, the advantages of a passive Auto-balancer device (ABD) eliminating the imbalance effect of rotor without using other active means have been recently studied. International Congress on Sound and Vibration, Vilnius, Lithuania, July , 2 stability by the active vibration control. The research work was granted by the Czech Science Foun-dation as a part of the research project No. /07/ “Active control of journal bearings . Active and Passive Vibration Control of Structures form an issue of very actual interest in many different fields of engineering, for example in the automotive and aerospace industry, in precision engineering (e.g. in large telescopes), and also in civil engineering. The papers in this volume bring. "A new 1,page reference book, "Handbook of Noise and Vibration Control," intended to be the definitive source on noise and vibration control for engineers, scientists, and researchers. The new reference book addresses a range of topics in acoustics and vibration, focusing on industrial needs.".
Tuma et al.  proposes a working prototype of a system for the active vibration control of journal bearings with the use of piezoactuators. The results show that the active vibration control. This thesis is concerned with the active vibration control of rotating machinery utilizing an active journal bearing. The main objectives are to develop general mathematical model of rotor systems incorporating the active journal bearing, for the purposes of dynamic analysis and control synthesis, and to formulate the control concepts for the vibration control. Control Force Vibration Control Magnetic Bearing Rotor Vibration Active Magnetic Bearing These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves. In earthquake engineering, vibration control is a set of technical means aimed to mitigate seismic impacts in building and non-building structures. All seismic vibration control devices may be classified as passive, active or hybrid  where.