大气数据计算机是如何利用温度修正静压的？

gbhill · 发表于 2010-3-30 16:02:55

如题，知道静压跟高度有关，不清楚如何修正的

woohynk · 发表于 2010-3-30 16:12:12

不好意思不知道啊，我ME的，等Av高人详解

lws83 · 发表于 2010-3-30 18:10:08

大气密度和温度有关系

zzhangkunq · 发表于 2010-4-1 17:16:59

这个我似乎也不清楚，我是AV的
哈哈

小丛 · 发表于 2010-4-2 10:20:17

静压的计算是ADM接收到左右两个静压孔的平均值，然后在经过静压源误差修正得到，静压源修正参数和FLAP、AOA、MACH，以及飞机的自身设计参数有关。所以静压的修正和温度的关系没有直接的关系，但是由于MACH和温度有相应的关系：SAT =TAT/(1+0.2M*M) - 273.15.也就是说M的计算是和温度有关系的，间接的说明了静压计算是和温度有关系的。
附上相应空客AMM的静压计算逻辑：
Pressure computation

Based on pressure raw data received from the ADM (Ref. para. 2.A.(2)(a)1), the software converts the asynchronous pressure inputs into regularly-scheduled pressure data.
During correction of static pressure, the software calculates the limited left, right and average static pressure in a range of 100 to 1100 hPa from the ADM inputs.
From the average static pressure (Psm), the software calculates the corrected static pressure based on the SSEC factor:

Psc = Psm  (1 +G1/1000  +G2/1000 )

-  G1 depends on flaps and Mach is interpolated in a table (2 flaps position and 19 Mach values are considered)

-  G2 depends on Mach and AOA corrected and is interpolated in a table (6 AOA values and 18 Mach values are considered).

The correct SSEC factor depends on the sensor location and on the aircraft configuration.
The ADR memory contains several tables and the appropriate one is selected according to the following input discretes:
                           . SDI

                           . aircraft Ident

                           . SSEC Alternate.

Two input discretes can be used to force the SSEC factor to be independent from AOA or Mach:
                           . zero MACH SSEC

                           . zero AOA SSEC.

Ref. Para. 2.A.(2)(c) for more details.
No correction is needed for the total pressure received from the ADM.
The results of the above computation is available on these output labels:
                  . label 176 Left Static Pressure

                  . label 177 Right Static Pressure

                  . label 242 Total Pressure

                  . label 245 Averaged Static Pressure

                  . label 246 Corrected Static Pressure

cafchuyan · 发表于 2010-4-2 13:49:43

静压源的误差主要取决于马赫数、静压孔的位置、机型、迎角、襟翼位置和起落架位置，和静温没有直接联系。而飞行中很难准确测出静压，一般是通过总温和马赫数来计算出静温的。

cafchuyan · 发表于 2010-4-2 13:56:01

错了，“而飞行中很难准确测出静压”，是“而飞行中很难准确测出静温”。

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