- precession of a top
- 陀螺的旋进
English-Chinese dictionary of mechanical engineering (英汉机械工程大词典). 2013.
precession of a top
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Precession — For other uses, see Precession (disambiguation). Precession of a gyroscope Precession is a change in the orientation of the rotation axis of a rotating body. It can be defined as a change in direction of the rotation axis in which the second… … Wikipedia
precession — [prē sesh′ən, prisesh′ən] n. [ME < LL praecessio < L praecedere, to PRECEDE] 1. the act of preceding; precedence 2. Astronomy short for PRECESSION OF THE EQUINOXES 3. Mech. an effect exhibited by a spinning body, as a top, when an applied… … English World dictionary
Precession (astronomy) — In astronomy, precession refers to the movement of the rotational axis of a body, such as a planet, with respect to inertial space. In particular, it refers to the precession of the Earth s rotational axis, also called the precession of the… … Wikipedia
precession — precessional, adj. /pree sesh euhn/, n. 1. the act or fact of preceding; precedence. 2. Mech. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the… … Universalium
Top — A top, or spinning top, is a toy that can be spun on an axis, balancing on a point. This motion is produced by holding the axis firmly while pulling a string. An internal weight then rotates, producing an overall circular motion. The top is one… … Wikipedia
precession — pre•ces•sion [[t]priˈsɛʃ ən[/t]] n. 1) the act or fact of preceding; precedence 2) mec the movement of the axis of rotation of a spinning body around another axis, outside the body and at an angle to it: an effect exhibited by a spinning top or… … From formal English to slang
top priority — Synonyms and related words: antecedence, antecedency, anteposition, anteriority, dominion, front position, precedence, precedency, preceding, precession, precursor, preference, prefixation, prelude, priority, prothesis, superiority, the lead,… … Moby Thesaurus
mechanics — /meuh kan iks/, n. 1. (used with a sing. v.) the branch of physics that deals with the action of forces on bodies and with motion, comprised of kinetics, statics, and kinematics. 2. (used with a sing. v.) the theoretical and practical application … Universalium
Mithraic Mysteries — Top: Mithras killing the bull, being looked over by the Sun god and the Moon goddess. Bottom: Mithras banqueting with the Sun god.] The Mithraic Mysteries or Mysteries of Mithras (also Mithraism) was a Roman mystery religion which became popular… … Wikipedia
Gyro monorail — The gyro monorail, gyroscopic monorail, gyro stabilized monorail, or gyrocar all denote a single rail land vehicle, road or rail, which uses the gyroscopic action of a spinning wheel, which is forced to precess, to overcome the inherent inverted… … Wikipedia
Gyroscope — A gyroscope is a device for measuring or maintaining orientation, based on the principles of angular momentum [ [http://demonstrations.wolfram.com/Gyroscope/ Gyroscope] by Sándor Kabai, The Wolfram Demonstrations Project.] [… … Wikipedia
