本文提出了一种多个加速度计的冗余制导方案，以仪表误差引起的制导命中误差最小为准则，用协方差分析法，导出加速计最佳安装方位。

This paper presents a multi-accelerometer redundant guidance scheme. The optimum orientations of accelerometers are derived to minimize the missing distance caused by instrument errors.

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如果这个装置跟太阳的方位不一致，那么，可以把它旋转90度与屋顶垂直，然后再安装。

Also, if this setup doesn't coincide with the position of the sun, then it can be rotated 90 degrees and mounted so that it is perpendicular to the roof peak.

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安装时请认清介质流向并按阀体上指示箭头方位正确安装。

Pay attention to the flow direction of medium and install the valve referring to the indicating arrow on the valve body.

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