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电子工程硕士毕业论文：Acceleration Transducer

1、The definition of acceleration transducer加速度传感器的定义

The acceleration transducer sees the acceleration associated with the phenomenon of weight experienced by any test mass at rest in the frame of reference of the acceleration transducer device. An acceleration transducer is a device that measures proper acceleration. The proper acceleration measured by an acceleration transducer is not necessarily the coordinate acceleration. For example, an acceleration transducer at rest on the surface of the earth will measure an acceleration g= 9.81 m/s2 straight upwards, due to its weight. By contrast, acceleration transducers in free fall or at rest in outer space will measure zero. Another term for the type of acceleration that acceleration transducers can measure is g-force acceleration [1].
An observational frame of reference, often referred to as a physical frame of reference, a frame of reference, or simply a frame, is a physical concept related to an observer and the observer's state of motion. Here we adopt the view expressed by Kumar and Brave: an observational frame of reference is characterized only by its state of motion. However, there is lack of unanimity on this point. In special relativity, the distinction is sometimes made between an observer and a frame. According to this view, a frame is an observer plus a coordinate lattice constructed to be an orthonormal right-handed set of space like vectors perpendicular to a time like vector. See Doran. This restricted view is not used here, and is not universally adopted even in discussions of relativity. In general relativity the use of general coordinate systems is common.
In physics, a frame of reference (or reference frame) may refer to a coordinate system used to represent and measure properties of objects, such as their position and orientation, at different moments of time. It may also refer to a set of axes used for such representation [2]. In a weaker sense, a reference frame does not specify coordinates, but only defines the same 3-dimensional space for all moments of time such that the frame can distinguish objects at rest from those that are moving. The need to distinguish between the various meanings of 'frame of reference' has led to a variety of terms. For example, sometimes the type of coordinate system is attached as a modifier, as in Cartesian frame of reference. Sometimes the state of motion is emphasized, as in rotating frame of reference. Sometimes the way it transforms to frames considered as related is emphasized as in Galilean frame of reference. Sometimes frames are distinguished by the scale of their observations, as in macroscopic and microscopic frames of reference.
There are two types of observational reference frame: inertial and non-inertial. An inertial frame of reference is defined as one in which all laws of physics take on their simplest form. In special relativity these frames are related by Lorentz transformations, which are parameterized by rapidit论文英语论文网提供整理，提供论文代写英语论文代写代写论文代写英语论文代写留学生论文代写英文论文留学生论文代写相关核心关键词搜索。

 内容 评论人 zhenxinbucuone,haha2016/12/20 15:19:28 m18766423292

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