汽车空调控制器软件需求分析

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"该文档是‘SW Requirements Document软件需求文档.pdf’，主要涵盖了汽车全自动空调控制器的软件需求，适用于汽车行业，特别是空调控制器系统的开发人员。文档由Siemens VDO Automotive AG于2003年发布，包含版权信息，并强调未经许可不得复制、传播或编辑。文档版本为a031，作者为Chen Zhen Tong Jinhui，日期为2013年10月。此文档旨在定义FAWA501项目中FATC（全自动空调控制器）软件组件的需求，处于ReadyDraft成熟阶段。" 在这份软件需求文档中，核心知识点包括： 1. **软件需求文档(SW Requirements Document)**：这是软件开发过程中的关键文档，详细列出了软件产品必须实现的功能和性能，以及非功能需求，如可靠性、兼容性、安全性等。它是后续设计、编码、测试和维护的基础。 2. **汽车全自动空调控制器(Fully Automated Temperature Control, FATC)**：这是一种先进的汽车内饰系统，能够自动调节车内温度、风速和方向，以提供舒适的驾驶环境。软件部分负责控制和监控空调系统的所有功能。 3. **汽车行业标准**：开发这样的系统需要遵循特定的汽车行业标准，例如ISO 26262（功能安全）、AUTOSAR（AUTomotive Open System ARchitecture）等，以确保软件质量和安全性。 4. **软件需求的分类**：在文档中，需求可能被分为功能需求和非功能需求。功能需求描述了系统必须执行的任务，如温度设定、模式选择、空气质量控制等。非功能需求则涉及系统如何执行这些任务，如响应时间、容错能力、可扩展性等。 5. **版本控制**：文档标注为Version a031，表示这是一个开发过程中的迭代版本，可能有多个版本以反映需求的演变和更新。 6. **文档管理**：文档的发布者、责任人和日期等信息表明了严格的文档管理和变更控制，这是大型项目中保持团队同步和确保质量的关键。 7. **成熟度级别(ReadyDraft)**：这表示文档已准备好供内部审查和讨论，但可能还未最终确定，意味着还有进一步修订和完善的空间。 8. **知识产权(IIPR)**：文档开头的声明强调了对内容的版权保护，任何未经授权的使用都可能引起法律纠纷。 9. **项目管理**：提到的SW Project Leader角色，表明软件项目有一个专门的负责人来监督项目的进展和质量。通过理解和实施这些知识点，汽车空调控制器的软件开发团队能够确保产品符合预期的功能需求，满足性能标准，并遵循行业最佳实践。

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带格式的: 制表位: 12.45 字符, 左对齐

带格式的: 制表位: 12.3 字符, 左对齐

带格式的: 页眉, 制表位: 12.3 字符, 左对齐 + 25.52 字

符, 居中 + 46.78 字符, 右对齐

The temperature measured at the temperature sensor depends to some extents on the vehicle speed and

may dither due to environment influences (bridgess, tunnels). In order to reduce the error caused by

these influences, the temperature signal is damped using a filter, which limits the decreasing outside

ambient temperature changes to -2.0 °C/min.

温度传感器测量温度受车速以及可能的一些环境影响(桥梁，山洞)，为避免这些影响带来的错误，温度信号

采用滤波器进行滤波，限制环境温度下降的速度为-2.0 °C/min。

Since the outside ambient temperature sensor is mounted at the front bumper of the car, heat soak errors

have to be compensated. Therefore, rising temperatures are damped vehicle speed dependent. If the

vehicle speed is below 30 km/h, increasing outside ambient temperatures are damped with 0.05 °C/min;

above a vehicle speed of 30 km/h, increasing temperatures are limited to 1.0 °C/min.

因为环境温度传感器安装在前保险杆，热误差必须得到补偿，因此，温度的增加依靠车速的抑制，如果车

速在30km/h以下，增加温度限制为0.05°C/min，车速在30km/h以上，温度增加限制在1.0 °C/min.

The analogue voltage values are assumed to be valid in the voltage range from 0.2 V to 4.85 V. Values

below respectively above these thresholds are ignored. In case of invalid values (caused by e.g. shorted

or broken circuitry), the outside ambient temperature is set to a default value of 25°C.

范围被假设为从0.2V到4.85V，大于4.85或是小于0.2的数值将被忽略。如果出现无效值，那么外部温度传

感器的温度被设定成默认值25摄氏度。

For all converted values of the voltage values to temperature, they are shown in the table below:

下表中显示了与温度对应的电压值：

Temperature

NTC Resistance

Analog Voltage

-430°C

35208 ohms

4.9607 volts

-20°C

19385 ohms

4.3130 volts

-10°C

11110 ohms

3.937 volts

0°C

6600 ohms

3.437 volts

+10°C

4049 ohms

2.872 volts

+20°C

2559 ohms

2.301 volts

+30°C

1661 ohms

1.781 volts

+40°C

1105 ohms

1.346 volts

+50°C

752 ohms

1.002 volts

+60°C

521 ohms

0.740 volts

+70°C

369 ohms

0.547 volts

+80°C

266 ohms

0.407 volts

Note: VAnalog = RNTC / (RNTC+RPullup) * 5

4.1.2 Evaporator Temperature 蒸发器温度

Generalities

The evaporator temperature sensor is mounted in the HVAC box downstream from the evaporator and

upstream from the mixed air temperature door. The temperature is measured with an NTC. The

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SW Requirements Document SV I IC5

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For Internal Use Only

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ation and/or editing of this document as well as utilization of its contents and communication there of to others without exp

ress authorization are prohibited.

Offenders will be held liable for payment of damages. All rights created by patent grant or regi

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带格式的: 制表位: 12.45 字符, 左对齐

带格式的: 制表位: 12.3 字符, 左对齐

带格式的: 页眉, 制表位: 12.3 字符, 左对齐 + 25.52 字

符, 居中 + 46.78 字符, 右对齐

characteristic line to calculate the temperature from the measured voltage signal is given via EEPROM

parameters (EvapTempX_Tbl and EvapTempY_Tbl).

蒸发器传感器安装在 HVAC 箱体中，它的温度通过一个负温度系数热敏电阻来测量；可以在 EEPROM 中

的参数来配置相关的特性曲线。

Functional Descriptions 功能描述

The analogue voltage values read from the NTC are damped to prevent the system being affected by

noise or small signal dither. Damping is performed using a first order low pass filter with a time constant

of T1 = 2.5 s.

为了防止噪音或是抖动，由 NTC 上读到的模拟信号的电压值经过了衰减处理；衰减是通过一个时间常数为

2.5s 的一阶低通滤波器来实现的。

The analogue voltage values are assumed to be valid in the voltage range from 0.2 V to 4.85 V. Values

below respectively above these thresholds are ignored. In case of invalid values (caused by e.g. shorted

or broken circuitry), the evaporator temperature is set to a default value of 25°C.

模拟信号的有效电压范围被假设为从 0.2V 到 4.85V，大于 4.85 或是小于 0.2 的数值将被忽略。如果出现

无效值，那么蒸发器的温度被设定成默认值 5 摄氏度。

For all converted values of the voltage values to temperature, they are shown in the table below:

下表中显示了与温度对应的电压值：

Temperature

NTC Resistance

Analog Voltage

-15°C

10837 ohms

3.297 volts

-10°C

8224 ohms

2.975 volts

0°C

4852 ohms

2.321 volts

10°C

2961 ohms

1.729 volts

20°C

1859 ohms

1.246 volts

30°C

1196 ohms

0.880 volts

40°C

790 ohms

0.618 volts

+50°C

533 ohms

0.435 volts

+60°C

368 ohms

0.308 volts

+70°C

259 ohms

0.221 volts

+80°C

186 ohms

0.161 volts

Note: VAnalog = RNTC / (RNTC+RPullup) * 5

4.1.34.2 Heater Core Temperature 加热器温度

Generalities 概述

The heater core temperature sensor is mounted in front of the heater core. The temperature is measured

with an NTC. The characteristic line to calculate the temperature from the measured voltage signal is

given via an NTC. The characteristic line to calculate the temperature from the measured voltage signal

is given via EEPROM parameters (HeaterCoreTempX_Tbl and HeaterCoreTempY_Tbl).

加热器传感器安装在加热器前面，它的温度通过一个负温度系数热敏电阻来测量；可以在 EEPROM 中的

参数来配置相关的特性曲线。

带格式的: 标题 2,Heading 2 Char,Heading 2 Char2

Char,Heading 2 Char Char Char,Heading 2 Char1 Char1

Char Char,Heading 2 Char Char Char Char Char,Heading 2

Char1 Char1 Char Char Char Char,Heading 2 Char Char

Char Char Char Char Char,Heading 2 Char1 Char3 Char

带格式的: 项目符号和编号

SW Requirements Document a03 FAW A501 SV I IC

SW Requirements Document SV I IC5

a01 FAW A501 FATC

Template: P730006F86b04

14 / 72

For Internal Use Only

Transmittal, reproduction, dissemin

ation and/or editing of this document as well as utilization of its contents and communication there of to others without exp

ress authorization are prohibited.

Offenders will be held liable for payment of damages. All rights created by patent grant or regi

stration of a utility model or design patent are reserved.

带格式的: 制表位: 12.45 字符, 左对齐

带格式的: 制表位: 12.3 字符, 左对齐

带格式的: 页眉, 制表位: 12.3 字符, 左对齐 + 25.52 字

符, 居中 + 46.78 字符, 右对齐

Functional Descriptions 功能描述

The analogue voltage values read from the NTC are damped to prevent the system being affected by

noise or small signal dither. Damping is performed using a first order low pass filter with a time constant

of T1 = 2.5 s.

为了防止噪音或是抖动，由 NTC 上读到的模拟信号的电压值经过了衰减处理；衰减是通过一个时间常数为

2.5s 的一阶低通滤波器来实现的。

The analogue voltage values are assumed to be valid in the voltage range from 0.2 V to 4.85 V. Values

below respectively above these thresholds are ignored. In case of invalid values (caused by e.g. shorted

or broken circuitry), the evaporator temperature is set to a default value of 25°C.

模拟信号的有效电压范围被假设为从 0.2V 到 4.85V，大于 4.85 或是小于 0.2 的数值将被忽略。如果出现

无效值，那么加热器的温度被设定成默认值 80 摄氏度。

For all converted values of the voltage values to temperature, they are shown in the table below:

下表中显示了与温度对应的电压值：

Temperature

NTC Resistance

Analog Voltage

-40°C

164590 ohms

4.861 volts

-30°C

86930 ohms

4.744 volts

-20°C

47863 ohms

4.553 volts

-10°C

27373 ohms

4.267 volts

0°C

16210 ohms

3.876 volts

+10°C

9910 ohms

3.392 volts

+20°C

6238 ohms

2.851 volts

+30°C

4033 ohms

2.309 volts

+40°C

2673 ohms

1.813 volts

+50°C

1812 ohms

1.391 volts

+60°C

1255 ohms

1.054 volts

+70°C

886 ohms

0.793 volts

+80°C

636 ohms

0.596 volts

Note: VAnalog = RNTC / (RNTC+RPullup) * 5

4.1.44.3 In Car Temperature 车内温度

4.1.4.14.3.1 Data Acquisition 数据获取

The ATC is taking readings from a car temperature sensor. The temperature is measured with an NTC.

The characteristic line to calculate the temperature from the measured voltage signal is given via

EEPROM parameters (InCarTempX_Tbl and InCarTempY_Tbl).空调控制头从车内温度传感器出读取车内

温度，它的温度通过一个负温度系数热敏电阻来测量；可以在 EEPROM 中的参数来配置相关的特性曲

线。

带格式的: 标题 2,Heading 2 Char,Heading 2 Char2

Char,Heading 2 Char Char Char,Heading 2 Char1 Char1

Char Char,Heading 2 Char Char Char Char Char,Heading 2

Char1 Char1 Char Char Char Char,Heading 2 Char Char

Char Char Char Char Char,Heading 2 Char1 Char3 Char

带格式的: 项目符号和编号

SW Requirements Document a03 FAW A501 SV I IC

SW Requirements Document SV I IC5

a01 FAW A501 FATC

Template: P730006F86b04

15 / 72

For Internal Use Only

Transmittal, reproduction, dissemin

ation and/or editing of this document as well as utilization of its contents and communication there of to others without exp

ress authorization are prohibited.

Offenders will be held liable for payment of damages. All rights created by patent grant or regi

stration of a utility model or design patent are reserved.

带格式的: 制表位: 12.45 字符, 左对齐

带格式的: 制表位: 12.3 字符, 左对齐

带格式的: 页眉, 制表位: 12.3 字符, 左对齐 + 25.52 字

符, 居中 + 46.78 字符, 右对齐

Functional Descriptions 功能描述

The analogue voltage values read from the NTC are damped to prevent the system being affected by

noise or small signal dither. Damping is performed using a first order low pass filter with a time constant

of T1 = 2.5 s.为了防止噪音或是抖动，由 NTC 上读到的模拟信号的电压值经过了衰减处理；衰减是通过一

个时间常数为 2.5s 的一阶低通滤波器来实现的。

The analogue voltage values are assumed to be valid in the voltage range from 0.2 V to 4.85 V. Values

below respectively above these thresholds are ignored. In case of invalid values (caused by e.g. shorted

or broken circuitry), the in car temperature is set to a default value of 25°C. 模拟信号的有效电压范围被假

设为从 0.2V 到 4.85V，大于 4.85 或是小于 0.2 的数值将被忽略。如果出现无效值，那么内温传感器的温

度被设定成默认值 25 摄氏度。

For all converted values of the voltage values to temperature, they are shown in the table below 下表中显

示了与温度对应的电压值：.

Generalities

The value is read from a car temperature sensor. The temperature is measured with an NTC. The

characteristic line to calculate the temperature from the measured voltage signal is given via EEPROM

parameters (InCarTempX_Tbl and InCarTempY_Tbl).

Functional Descriptions

The analogue voltage values read from the NTC are damped to prevent the system being affected by

noise or small signal dither. Damping is performed using a first order low pass filter with a time constant

of T1 = 2.5 s.

The analogue voltage values are assumed to be valid in the voltage range from 0.2 V to 4.85 V. Values

below respectively above these thresholds are ignored. In case of invalid values (caused by e.g. shorted

or broken circuitry), the evaporator temperature is set to a default value of 25°C.

For all converted values of the voltage values to temperature, they are shown in the table below:

Temperature

NTC Resistance

Analog Voltage

-30°C

37681 ohms

4.353 volts

-20°C

20747 ohms

3.937 volts

-10°C

11890 ohms

3.399 volts

0°C

7063 ohms

2.789 volts

+10°C

4333 ohms

2.181 volts

+20°C

2739 ohms

1.642 volts

+30°C

1778 ohms

1.205 volts

+40°C

1183 ohms

0.872 volts

+50°C

804 ohms

0.628 volts

+60°C

558 ohms

0.453 volts

+70°C

395 ohms

0.329 volts

+80°C

284 ohms

0.241 volts

Note: VAnalog = RNTC / (RNTC+RPullup) * 5

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