时间：2011-03-11 23:18来源：蓝天飞行翻译 作者：航空 点击：次
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simple motion. Motion along a straight line, a circular path, or a helix. simplex communications. A method of communications in which one station transmits while the other receives, then the second station transmits and the first receives. Simplex communications differs from duplex communications, such as telephone, in which both stations can transmit and receive at the same time. simplex fuel nozzle (gas turbine engine component). A type of fuel nozzle in a gas turbine engine in which all of the fuel is fed to the nozzle through a single fuel manifold. simulate. To copy something or to make something that represents or acts like something. When a person is learning to fly an airplane, the flight instructor simulates every emergency situation the student is likely to encounter. By experiencing these simulated emergencies under controlled conditions, the student will know how to act if the real emergency ever occurs. simulator. A device used for training or research that duplicates a piece of complex equipment. Flight simulators duplicate the cockpit of an airplane. All of the controls and instruments are connected to a computer that gives the operator the feel and the indications that would exist under actual flight conditions in a real aircraft. Emergency and unusual conditions can be simulated and practiced in the simulator far more safely and economically than can be done in the real aircraft. sine (trigonometric function). The sine of an angle is the ratio of the length of the side of a right triangle opposite the angle, to the length of the hypotenuse (the side opposite the right angle). Sine is abbreviated sin. sine wave. The waveform of a periodically reversing vibration produced by a rotating machine in which the instantaneous values of the wave are the peak value multiplied by the sine of the angle through which the rotating element has turned. sine-wave alternating current. Alternating current whose waveform is that produced by a rotary generator. The instantaneous value of sine-wave voltage is found by multiplying its peak value by the sine of the angle through which the rotor of the generator has turned. |
