Results 321 to 330 of about 3,274,537 (356)
Some of the next articles are maybe not open access.
Angular Speed of a Compact Disc
The Physics Teacher, 2006A spinning motion of a compact disc in a CD player offers an interesting and challenging problem in rotational kinematics with a nonconstant angular acceleration that can be incorporated into a typical introductory physics class for engineers and scientists.
openaire +1 more source
Low Speed Bearings’ Instantaneous Angular Speed Behavior
2015This work describes shaft’s Instantaneous Angular Speed (IAS) behavior in the presence of a spall on bearing’s race at low speeds. It is shown that fault signature becomes more apparent in IAS signal when speed decreases and load increases. EEMD processing of the signal is implemented to overcome the shortcoming of IAS sensitivity at low loading ...
Fabrice Bolaers +4 more
openaire +2 more sources
A capacitive finger-type angular-position and angular-speed sensor
IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222), 2002A robust capacitive finger-type angular-position and angular-speed sensor for automotive and metrology applications is presented. The main advantages of this low-cost system are easy mounting and replacement, its simplicity, speed and high resolution (/spl plusmn/0.02/spl deg/) over the absolute measurement range of 180/spl deg/, compact sensor ...
openaire +2 more sources
Instantaneous angular speed monitoring of electric motors
Journal of Quality in Maintenance Engineering, 2004This research presents the theory and implementation detail for the extraction of angular speed variations. In particular, band‐pass filtering, frequency shifting and analytic representation are addressed with simple mathematical equations. Finally, some case studies on a 3kW induction motor are investigated for healthy and faulty conditions.
Fengshou Gu +3 more
openaire +2 more sources
Digital measurement of angular velocity for speed control
IEEE Transactions on Industrial Electronics, 1989A digital method to measure angular velocity for machine control applications is described. The method uses a phase-locked loop to multiply the frequency and reject the jitter. The process for measurement is completed in a very short time, providing not only quick readouts, but also information on transient velocity.
C.F. Christiansen +3 more
openaire +2 more sources
The nature of angular carbides in high-speed steel
Metal Science and Heat Treatment, 19741. High-temperature annealing of Fe−C−W alloys with 1.69–1.81% C and 19.7–11.2% W leads to the division, spheroidization, and coalescence of the eutectic cubic carbide (W, Fe)6C and the nucleation and growth of angular hexagonal WC, at the expense of reducing the amount of cubic carbide. 2. Some of the individual carbide particles in the
P. F. Nizhnikovskaya +2 more
openaire +2 more sources
On the modeling of a capacitive angular speed measurement sensor
Measurement, 2013Abstract In the present article, a perceptive capacitive sensor for measuring angular speed of a rotating shaft is proposed. The proposed sensor is capable of measuring rotating shaft angular speed, and its changes. The proposed model’s sensing part is a suspended clamped–clamped micro-beam, which is parallel with two fixed substrates from the upper ...
Rasoul Shabani +4 more
openaire +2 more sources
A MUMPs angular-position and angular-speed sensor with off-chip wireless transmission
Microsystem Technologies, 2001A novel surface-micromachined non-contact high-angular-speed sensor with total surface area under 4 mm2 was developed using the multi-user MEMS processes (MUMPs), and was integrated with a commercial RF transmitter with carrier frequency of 433 MHz for wireless signal detection.
W. Sun, Wen J. Li, Yong Xu
openaire +2 more sources
Basic Speed Ratio of an Angular Contact Bearing
Journal of Lubrication Technology, 1980A characteristic number, the basic speed ratio for an angular contact ball bearing, is defined and shown to be 1) accurately measurable; and 2) dependent on ball-race coupling. Some measurements of basic speed ratio are discussed in terms of kinematic equivalence, and compared with predictions obtained from a computer simulation.
openaire +2 more sources
Student understanding of the kinematic quantities of angular speed and angular acceleration
1993This study describes first and second year university physics students' understanding and reasoning of the concepts, angular speed and angular acceleration. The analysis was based on student responses to various tasks presented to them during one hour long interviews.
openaire +2 more sources