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加速度的物理仿真是飞行器物理仿真实验的主要组成部分。由于产生加速度的仿真设备不是安置在绝对的惯性系中,而是安置在地球上,所以设备上的加速度除该设备产生的那一部分之外,还附一部分由地球自转运动而产生的加速度。加速度仿真设备有两大类型,一种是利用地球的引力场和加速度计的敏感轴方向制造所需要的加速度;另一种是利用圆周运动的离心加速度和加速度计的敏感轴方向制造所需要的加速度。本文仅讨论后者,即地球自转运动所产生的加速度同加速度转台的关系。因为地球自转对用前一种方式进行实验所产生的影响,可以根据对后一种方式的分析、计算思想,很容易推导出来。此文为加速度的实验提供分析依据。也为利用补偿手段提高加速度仿真设备的精度,提供必要的数学模型。
The physical simulation of acceleration is a major part of the physics experiment of aircraft. Since the simulation device that produces the acceleration is not placed in an absolute inertial system but rather is placed on Earth, the acceleration on the device is accompanied by a portion of the acceleration caused by the rotation of the Earth in addition to that produced by the device. There are two types of acceleration simulation equipment, one is the use of the Earth’s gravitational field and accelerometer sensitive axis direction to create the required acceleration; the other is the use of centrifugal acceleration of circular motion and accelerometer sensitive axis direction to create the required Acceleration. This paper only discusses the latter, that is, the relationship between the acceleration produced by the Earth’s rotation and the acceleration turntable. Because the effects of the Earth’s rotation on the experiment in the former way can be easily derived from the analysis and calculation of the latter method. This article provides the basis for the experiment of acceleration. It also provides the necessary mathematical model for improving the accuracy of acceleration simulation equipment by means of compensation.