什么是系统工程(字幕)48

0

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那这里我们要说一下

1

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你看,刚才我们这里

2

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3

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这个我们把它说成,打开这个,关闭这个

4

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但实际上这个do活动应该是一个什么

5

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持续的活动

6

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按道理应该是写着保持这个

7

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加热器的

8

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保持加热器打开

9

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这个应该写保持电源灯打开

10

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它不是一个瞬间的

11

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但如果说我们把这个改成

12

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比如说,保持电源灯打开

13

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这个不对了

14

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这瞬间的,这个是

15

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这不是瞬间的

16

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而且更麻烦的是什么

17

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你看,这里

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如果你说,这个

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它的意思是

20

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如果把这个理解成保持bx1加热器关闭

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那你看它这个

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它又放在入口这里

23

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又不对了

24

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所以呢,这个图本身,后面可能作者就已经乱掉了

25

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但没关系

26

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我们就按照这个来

27

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这个图内容不管

28

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我们就学习这个操作

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1

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接下来

2

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3

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这个有了,下面这个

4

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打开这个阀门

5

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打开这个阀门,一样的

6

00:00:34,520 --> 00:00:35,400

7

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这个是关闭所有阀门

8

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9

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这是这个

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然后下面是这个

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关闭排空阀门

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打开排空阀门

13

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阀门是它的类

14

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是它的类型

15

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排空是那个阀门扮演的角色

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就是我们前面画其他的图

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说到的

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19

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这些都有了吗

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都有了

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接下来我们来画

22

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它们之间的迁移了

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24

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你看,迁移,这个是过来

25

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没有事件的

26

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只有条件

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没有触发器

28

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只有条件

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那我们

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首先第一个迁移

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关 到 注入中

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33

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迁移我们看

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画它的那个

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条件是什么

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开关是开的

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38

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开关

39

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为开

40

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41

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这里

42

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43

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我们可以把它那个角

44

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变成圆一点

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圆一点

46

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过来

47

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是这样

48

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我们先画这边

49

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然后这边过来也是一个条件

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NOT bx1水位低

51

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那我们

52

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照抄

53

00:03:19,070 --> 00:03:22,240

再往下,bx1温度

54

00:03:23,170 --> 00:03:24,300

等于100

55

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56

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57

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看下一个

58

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先画这个外面的

59

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这是关闭命令

60

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这应该是什么

61

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应该是放在那个触发器这里的

62

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结果它放在警戒条件,已经不对了

63

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我们按照正确的来画

64

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应该是

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应该是在这里

66

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关闭

67

00:04:21,100 --> 00:04:22,160

命令

68

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命令这个词都是冗余了

69

00:04:28,660 --> 00:04:29,880

70

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关闭就行了

71

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还加一个命令

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73

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再往上

74

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这个等于30

75

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一样的

76

00:05:07,660 --> 00:05:08,410

77

00:05:09,080 --> 00:05:11,350

过来,bx水位低

78

00:05:29,590 --> 00:05:29,885

79

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改成圆角

80

00:05:36,060 --> 00:05:36,313

81

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这是这个,那我们看下面这个地方

82

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这个,水位低,水位不低

83

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水位高,水位不高

84

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就是这个搞来搞去

85

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我们把这个上面复制一下

86

00:05:58,930 --> 00:05:59,305

87

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水位低

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再拉一点

89

00:06:24,170 --> 00:06:25,080

90

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这个是

91

00:06:31,190 --> 00:06:33,930

bx1水位低

92

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然后呢

93

00:06:38,926 --> 00:06:41,110

下面这个就是

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加一个NOT

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按住Ctrl

96

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97

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98

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同样

99

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改成圆角

100

00:08:51,760 --> 00:08:51,935

101

00:08:51,935 --> 00:08:54,923

轮到下面这个,是一个定时器

102

00:08:54,923 --> 00:08:56,330

这个是

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残渣定时器

104

00:08:59,643 --> 00:09:02,080

这个是排空定时器

105

00:09:05,660 --> 00:09:08,030

应该是那个

106

00:09:08,390 --> 00:09:10,510

定时器是一个触发器

107

00:09:10,820 --> 00:09:11,106

108

00:09:11,106 --> 00:09:12,537

然后

109

00:09:12,537 --> 00:09:13,110

这个

110

00:09:13,500 --> 00:09:18,097

里面的条件是超时什么之类的

111

00:09:18,097 --> 00:09:18,960

但这个

112

00:09:19,260 --> 00:09:21,092

这个图我们不管了

113

00:09:21,092 --> 00:09:22,110

照着画

114

00:09:22,110 --> 00:09:24,350

它这个画得乱七八糟的

115

00:09:27,600 --> 00:09:27,777

116

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就画在这里

117

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残渣

118

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定时器

119

00:09:49,000 --> 00:09:50,050

排空定时器

120

00:09:51,750 --> 00:09:52,710

齐了吗

121

00:09:56,950 --> 00:09:57,155

122

00:09:57,155 --> 00:09:58,180

应该齐了

123

00:09:58,460 --> 00:09:59,960

就这样

124

00:10:00,590 --> 00:10:02,144

我们可以把它对齐一下

125

00:10:02,144 --> 00:10:02,300

126

00:10:02,600 --> 00:10:03,519

你要是愿意

127

00:10:03,519 --> 00:10:04,990

可以把它对齐一下

128

00:10:35,600 --> 00:10:35,820

129

00:10:35,820 --> 00:10:38,030

这边可以过来一点

130

00:10:58,500 --> 00:10:59,220

131

00:11:19,440 --> 00:11:19,754

132

00:11:19,754 --> 00:11:21,010

就这样

133

00:11:21,330 --> 00:11:22,680

状态机

134

00:11:23,030 --> 00:11:24,600

我们就画完了

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