系统误差

Then , aiming at characteristic of MCG data , we design the object of error analysis and make concrete analysis by error theory . We draw the conclusions that MCG signals measured by SQUID include obvious random errors and no system errors and crassitude errors .

本文根据心磁信号的测量过程，分析了测量过程中可能产生的误差，针对心磁数据的特点设计了误差分析对象，应用误差理论进行分析计算，得出了通过SQUID测得的心磁信号包含明显的随机误差，无根据怀疑存在系统误差和粗大误差的结论。

As steady error coefficient is an important index in measuring system error, it is introduced into the performance index set. A solution of satisfactory biased estimation strategy is proposed by assuming that the maneuver of target is finite, which can ensure the accuracy and stability of the estimation output.

稳态误差系数是衡量系统误差的一个重要指标，于是本文将估计系统的动态误差系数纳入多指标约束，借助满意估计理论，在假定目标机动强度有限的前提下，给出了可兼顾滤波输出精度和平稳性要求的满意有偏滤波器的设计方法。

Block recursive model ; Axiom of error ; Variable linear system error ; Constant system error ; Variance analysis

块递归模型；误差公理；可变线性系统误差；恒定系统误差；方差分析

This paper brings up with the theory of Virtual Coordinate Measuring System. The basic theoretic models of the virtual coordinate measuring system are given. This theory of virtual coordinate measuring system makes use of the principle of Time-Space correspondence and turns the time pulses into spatial displacement. The virtual coordinate measuring system can take the place of the scale system in traditional instruments, which has the disadvantages of high cost and difficulty ofproduction.

本文同时提出并建立虚拟坐标测量系统理论；该理论从传统的测量仪器出发，将传统仪器的实物标尺系统虚拟化，克服了实物标尺系统加工制造困难，及造价高等缺点，将硬件结构简化；本文提出并建立初步的虚拟坐标测量系统模型，并在三坐标测量机上建立了一维虚拟坐标测量系统的实验模型，初步分析系统的系统误差与其随机误差源。

The experimental results show that the relative system error of x-axis of navigation coordinate is less than 20%, and those of y-axis and z-axis are less than 4%, respectively.

结果表明：导航系X轴的相对系统误差＜20%，Y轴、Z轴的相对系统误差＜4%，验证了误差数学模型的正确性。

Sphere fitting method, conicoid fitting method and line scanning curve fitting method are used to approach system error for the first time. The effect on the measurement error of each method is also analyzed.

首次利用球面拟合法、二次曲面拟合法以及行扫描曲线拟合法去逼近系统误差，并分析了各种方法进行系统误差校正时对最终测量误差的影响。

The experiment results show that the measuring errors are more than 10' and these are zero point error and the non-lincar system error when the two obliquity angles of the kingpin are more than 15°, and the system errors increase as the kingpin obliquities increase.

试验表明：受检四轮定位仪当主销两倾角均大于15时，其测量误差大于10'，存在零点和线性度系统误差，且系统误差随主销倾角的增大而增大，从而解决了测量主销倾角量值检定的问题。

Adopt project practical quaternion algorithm of strapdown navigation system, Analyze systematic error source, emulation prove the output change of SINS in there is device error of inertia and the initial condition of collimation error.

采用了工程上实用的四元数捷联导航系统的算法，分析了系统误差源，仿真验证了捷联惯导系统在有惯性器件误差及初始对准误差情况下的输出变化。

On line correction of setup error using EPID in order to reduce systematic error and random error and then improve setup precision.

在EPID系统下进行实时摆位误差纠正，可进一步降低摆位系统误差和随机误差，提高摆位精度。

On a grating type gear integrated error measuring equipm ent, this technique employs the three-point method error separation technique fo r separation of the systematic error of the measuring chain of equipment spindle system including measuring worm error, grating transducer error, bearing rota ry error etc.

在一台光栅式齿轮整体误差测量仪上，它用三点法误差分离技术能分离开仪器轴系测量链的系统误差(包括测量蜗杆误差、光栅传感器误差、轴承回转误差等)和被测齿轮的全谐波误差。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失