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1 vibrating period
Морской термин: период колебаний -
2 vibrating period
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3 период колебаний
1) Geology: time of oscillation, time of vibration2) Naval: oscillatory period, period of oscillations, period of vibration, period of vibrations, vibrating period, vibrational period3) Engineering: cycle of vibration, oscillation period, period of oscillation, period of swing, time of swing, vibration period, wave period4) Construction: pitch of vibrations, time of oscillations5) Physics: period6) Oil: frequency period7) Metrology: time of swing (например, коромысла весов)8) Automation: periodic9) Aviation medicine: cycle10) Makarov: cycle of oscillation, cycle of oscillations, period of swing (маятника) -
4 колебание(я)
fluctuation, vibration
(величины, напр., давления, напряжения) — fluctuation or vibration on each side of a mean value or position.
- (периодический процесс) — oscillation
-, вынужденные — forced oscillation
-, вынужденное (вибрационнoe) — forced vibration
вибрация от воздействия внешних периодически прилаженных сил, — when vibration results from the application of an external periodic force.
-, высокочастотное ("зуд" поверхности управления) непрерывное колебание поверхности управления, вызываемое прерывистым отрывом воздушного потока. — buzz. sustained oscillation of a control surface caused by intermittent flow separation.
-, высокочастотные ("зуд") элероны — aileron buzz
-, изгибное — bending vibration
-, крутильное — torsional vibration
- лопасти несущего винта относительно вертикального шарнира — hunting angular oscillation of а rotor blade about the drag hinge.
- напряжения — voltage fluctuation
-, незатухающие — sustained oscillation
-, неустановившиеся — transient vibration
любое движение в вибрационной системе за период, потребный для перехода системы из одного условия приложения силы в другое, — any motion in a vibrating system which occurs during the time required for the system to adapt itself from one force condition to another.
- оборотов — speed/rpm/ fluctuation, variation in rpm, speed variation
- no крену — roll(ing) oscillation
- no тангажу — pitch(ing) oscillation
- подачи питания — power supply variations
- показаний (указателя) — unstable display /reading/
-, поперечное (самолета) — lateral oscillation
любое движение, вызываемое периодическим изменением движения самолета по крену, рысканию и боковому скольжению. — any motion which is made up of а periodic variation of the rolling, jawing and side-slipping of an aircraft.
-, принудительное — forced oscillation
-, продольное (самолета) — longitudinal oscillation
любое движение, вызываемое периодическим изменением скорости полета, высоты и угла тангажа. — any motion which is made up of а periodic variation of the flight speed, height and angle of pitch of an aircraft.
-, продольное кратковременное — short-period longitudinal oscillation
при данном виде колебаний поступательная скорость самолета остается практически неизменной, но возникают изменения угла атаки и пространственного положения ла. — in short-period oscillations the aircraft forward speed remains substantially constant, involving predominantly changes in the incidence and attitude.
- рыскания — yawing oscillation
-, свободное (собственное) — free vibration
вибрационное движение в упругой системе, выведенной из состояния равновесия, и свободной от дальнейшего приложения внешней силы. — free vibration is the vibratory motion which takes place when an elastic system is displaced from its equilibrium position and released.
-, скручивающие — torsional vibration
- стрелки (прибора) — pointer oscillation
- стрелки прибора (относительно отметки шкалы) стрелка должна возвратиться в нулевое положение, проходя через нулевую отметку не более двух раз. — crossing the pointer should return to zero without crossing the zero mark more than twice.
- температуры — temperature variation
-, установившееся (устойчивое) — steady-state vibration
-, фугоидное — phugoid oscillation
длинно-периодные колебания при нарушении продольнаго движения самолета. — а long-period oscillation characteristic of the disturbed longitudinal motion of an aeroplane.
- шимми — shimmy
вынужденные колебания самоцентрирующегося переднего колеса шасси относительно оси свободного ориентирования при движении по поверхности с повышенным коэффициентом трения. — а forced oscillation of a casfaring wheel about the castor axis when travelling on a surface the coefficient of friction of which exceeds a critical value.
затухание к. стрелки (прибоpa) — damping of the pointer oscillation
успокоение к. — oscillation damping
гасить к. — damp oscillationРусско-английский сборник авиационно-технических терминов > колебание(я)
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5 Huygens, Christiaan
SUBJECT AREA: Horology[br]b. 14 April 1629 The Hague, the Netherlandsd. 8 June 1695 The Hague, the Netherlands[br]Dutch scientist who was responsible for two of the greatest advances in horology: the successful application of both the pendulum to the clock and the balance spring to the watch.[br]Huygens was born into a cultured and privileged class. His father, Constantijn, was a poet and statesman who had wide interests. Constantijn exerted a strong influence on his son, who was educated at home until he reached the age of 16. Christiaan studied law and mathematics at Ley den University from 1645 to 1647, and continued his studies at the Collegium Arausiacum in Breda until 1649. He then lived at The Hague, where he had the means to devote his time entirely to study. In 1666 he became a Member of the Académie des Sciences in Paris and settled there until his return to The Hague in 1681. He also had a close relationship with the Royal Society and visited London on three occasions, meeting Newton on his last visit in 1689. Huygens had a wide range of interests and made significant contributions in mathematics, astronomy, optics and mechanics. He also made technical advances in optical instruments and horology.Despite the efforts of Burgi there had been no significant improvement in the performance of ordinary clocks and watches from their inception to Huygens's time, as they were controlled by foliots or balances which had no natural period of oscillation. The pendulum appeared to offer a means of improvement as it had a natural period of oscillation that was almost independent of amplitude. Galileo Galilei had already pioneered the use of a freely suspended pendulum for timing events, but it was by no means obvious how it could be kept swinging and used to control a clock. Towards the end of his life Galileo described such a. mechanism to his son Vincenzio, who constructed a model after his father's death, although it was not completed when he himself died in 1642. This model appears to have been copied in Italy, but it had little influence on horology, partly because of the circumstances in which it was produced and possibly also because it differed radically from clocks of that period. The crucial event occurred on Christmas Day 1656 when Huygens, quite independently, succeeded in adapting an existing spring-driven table clock so that it was not only controlled by a pendulum but also kept it swinging. In the following year he was granted a privilege or patent for this clock, and several were made by the clockmaker Salomon Coster of The Hague. The use of the pendulum produced a dramatic improvement in timekeeping, reducing the daily error from minutes to seconds, but Huygens was aware that the pendulum was not truly isochronous. This error was magnified by the use of the existing verge escapement, which made the pendulum swing through a large arc. He overcame this defect very elegantly by fitting cheeks at the pendulum suspension point, progressively reducing the effective length of the pendulum as the amplitude increased. Initially the cheeks were shaped empirically, but he was later able to show that they should have a cycloidal shape. The cheeks were not adopted universally because they introduced other defects, and the problem was eventually solved more prosaically by way of new escapements which reduced the swing of the pendulum. Huygens's clocks had another innovatory feature: maintaining power, which kept the clock going while it was being wound.Pendulums could not be used for portable timepieces, which continued to use balances despite their deficiencies. Robert Hooke was probably the first to apply a spring to the balance, but his efforts were not successful. From his work on the pendulum Huygens was well aware of the conditions necessary for isochronism in a vibrating system, and in January 1675, with a flash of inspiration, he realized that this could be achieved by controlling the oscillations of the balance with a spiral spring, an arrangement that is still used in mechanical watches. The first model was made for Huygens in Paris by the clockmaker Isaac Thuret, who attempted to appropriate the invention and patent it himself. Huygens had for many years been trying unsuccessfully to adapt the pendulum clock for use at sea (in order to determine longitude), and he hoped that a balance-spring timekeeper might be better suited for this purpose. However, he was disillusioned as its timekeeping proved to be much more susceptible to changes in temperature than that of the pendulum clock.[br]Principal Honours and DistinctionsFRS 1663. Member of the Académie Royale des Sciences 1666.BibliographyFor his complete works, see Oeuvres complètes de Christian Huygens, 1888–1950, 22 vols, The Hague.1658, Horologium, The Hague; repub., 1970, trans. E.L.Edwardes, AntiquarianHorology 7:35–55 (describes the pendulum clock).1673, Horologium Oscillatorium, Paris; repub., 1986, The Pendulum Clock or Demonstrations Concerning the Motion ofPendula as Applied to Clocks, trans.R.J.Blackwell, Ames.The balance spring watch was first described in Journal des Sçavans 25 February 1675, and translated in Philosophical Transactions of the Royal Society (1675) 4:272–3.Further ReadingH.J.M.Bos, 1972, Dictionary of Scientific Biography, ed. C.C.Gillispie, Vol. 6, New York, pp. 597–613 (for a fuller account of his life and scientific work, but note the incorrect date of his death).R.Plomp, 1979, Spring-Driven Dutch Pendulum Clocks, 1657–1710, Schiedam (describes Huygens's application of the pendulum to the clock).S.A.Bedini, 1991, The Pulse of Time, Florence (describes Galileo's contribution of the pendulum to the clock).J.H.Leopold, 1982, "L"Invention par Christiaan Huygens du ressort spiral réglant pour les montres', Huygens et la France, Paris, pp. 154–7 (describes the application of the balance spring to the watch).A.R.Hall, 1978, "Horology and criticism", Studia Copernica 16:261–81 (discusses Hooke's contribution).DV -
6 meter
1) метр•- ac watthour meter
- acoustic Mach meter
- active-power meter
- audio-frequency meter
- balanced-potential meter
- battery-meter meter
- candle power meter
- capacitance meter
- cavity-frequency meter
- clamp-on meter
- current meter
- dc meter
- decibel meter
- differential-frequency meter
- digital Z meter
- digital-frequency meter
- echo meter
- electrical power meter
- electrical-impedance meter
- electronic phase-angle meter
- field-tensity meter
- footcandle meter
- Frahm-frequency meter
- frequency meter
- gain-phase meter
- grid-rectifying meter
- heterodyne-frequency meter
- impedance meter
- inductance meter
- induction watt-hour meter
- insertion meter
- integrating-frequency meter
- light meter
- luminance meter
- Madsen-impedance meter
- master-frequency meter
- modulation meter
- motor meter
- moving-coil meter
- moving-iron meter
- noise-figure meter
- peak-program meter
- period meter
- phase meter
- phase-angle meter
- photoconductive meter
- polyphase meter
- portable gamma-ray meter
- power meter
- power-factor meter
- pressure meter
- Q-meter
- quality-factor meter
- quotient meter
- ratio meter
- reactivity meter
- reed-type frequency meter
- resistance meter
- RF-meter
- signal-strength meter
- S-meter
- sound level meter
- standard meter
- standing wave meter
- static charge meter
- static watthour meter
- S-unit meter
- SWR meter
- through-line meter
- time meter
- tuned-reed frequency meter
- vibrating-reed frequency meter
- voltage meter
- volt-ohm meter
- volt-ohm-milliampere meter
- volume meterEnglish-Russian dictionary of telecommunications and their abbreviations > meter
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