系统误差

Based on perspective projection model,a modified parallel projection method for flying pose measurement is proposed.

摄影系统的成像满足透视投影模型，使用平行投影法做飞行姿态交会存在模型误差。

The repetitive control is introduced for current control of active power filter to eliminate the steady state periodic error.

针对有源电力滤波器的被控电流为周期变化的正弦量，提出引入重复控制对有源电力滤波器电流进行控制，以减小系统的稳态误差。

These signals are processed by the modules; the system then collects the resulting data and compares them with the standard values of the corresponding signals to determine if they are within the permissible range of error.

信号经模块处理后，系统采集结果数据，并将之与该信号对应标准值进行比较，判断其是否在误差范围内。

The method is still effective when there exists parameter perturbation and measurement noise.

陷况卜实现控制，当系统参数存在摄动和有测量误差时控制仍然有效。

Phase angle error in the system was the main concern to reduce measurement error.

相角误差是影响此系统测量精度的重要因素。

According to three compared experiments, which are using simple tactile guide, with visual guide and with tactile board, we conclude that the simulated phosphene positioning system with tactile board is accurate (the mean error is less than 10mm) and reproducible (the standard deviation is less than 6mm) in evaluating simulated phosphene.

如此循环往复，在经过简单触觉导航、加入视觉导航和具有触摸板导航的三个对照性实验后，我们得出具有触摸板导航的模拟光幻视定位系统能够精确(平均误差小于10mm)且稳定(标准差小于6mm)的对模拟光幻视点进行定位。

Thomson, Einstein and Millikan, of Whom have studied the Photoelectric Effect and have got some conclusions on it.

本文较全面地介绍了光电效应的研究历史，较系统地论述了光电效应法测量的依据及误差来源。

Based on the non-linear system and in the light of the characteristics of piecewise linearization of the bumper performance curve in the calculation of train coupling s,the calculation formulas are re-deduced by use of the basic principles of Newmark-β method.

基于非线性系统，针对列车连挂计算中缓冲器特性曲线分段线性化的特点，利用Newmark-β方法的基本原理重新推导计算公式，改进了传统的Newmark-β方法，改善了算法的稳定性，减小了计算误差，使之适用于列车连挂的计算。

If called the heavy system work plane has certainly the angle of tiltto be able to cause the measurement result the error.

如果称重系统工作平面有一定倾斜角度就会导致测量结果的误差。

The helicopter blade running elevation measurement is the kernel part of helicopter blade dynamic balance experimental platform system, also is the main part of this dissertation.

论文从国内外对旋翼共锥度的测量方法出发，对几种测量方法进行比较分析，最后确定采用激光测量的方法。对激光测量的测量原理和测量误差进行了分析，对系统关键参数进行了计算。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。