Rockwell-automation RSLogix 5000 Fuzzy Designer User Manual Page 14
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Publication LOGIX-UM004A-EN-P - March 2007
14 Get Started with FuzzyDesigner
Crisp and Fuzzy
For temperature readings, you can classify a reading into three sets,
Low, Medium and High. Each set contains values in a given interval,
and the intervals do not overlap. This means that a single reading or
value is uniquely classified into one set.
However, vague classifications are more realistic as there is usually no
sharp border between Low, Medium, or High temperatures. In this
situation, however, a single numerical value might fall into multiple
categories. For example, it might be partially Medium, and partially
High as shown in the following figure. A specification of how much
the particular value of temperature fits into the meaning of the label of
the category (fuzzy set) is described by the membership function,
which becomes a design parameter of the fuzzy controller.
TIP
Degree of membership (DOM) is a value describing how well
the particular value of the variable (in this case, temperature)
fits the meaning of the label of the set, Medium. If the DOM is
1, the current temperature is understood as 100% Medium.
Low Medium
High
range
20
150
range
20
range
20
150
temperaturetemperaturetemperature
1
0
degree of membership
(level of classification)
1
0
degree of membership
(level of classification)
Crisp ValueCrisp Value
1.00
Medium
Medium
0.0
High
High
0.0
Low
Low
1.00
Medium
Medium
0.0
High
High
0.0
Low
Low
Classification
Result
- RSLogix 5000 1
- Fuzzy Designer 1
- Important User Information 2
- Table of Contents 3
- Chapter 3 4
- FuzzyDesigner Graphical User 4
- Interface 4
- Chapter 4 4
- FuzzyDesigner Projects 4
- 5 5
- 6 6
- About This Publication 7
- Who Should Use This 7
- Publication 7
- Conventions 7
- 8 Preface 8
- Understanding 9
- FuzzyDesigner 9
- Nonlinear System Example 12
- Low Medium 14
- Fuzzy rules 15
- Potential Use of Fuzzy Logic 16
- Specifications and Features 18
- Fuzzy System Analysis Tools 19
- Fuzzy System Monitoring 20
- FuzzyDesigner Project Formats 21
- Integrated Design 22
- Environment (IDE) screen 22
- Project Tree view 24
- DOF(negative) is maximal 26
- FuzzyDesigner PID Controller 27
- Component Interface 29
- Supported Membership 30
- Functions 30
- User Defined Filter 33
- Butterworth Low Pass Filter 33
- Input Linguistic Variable 34
- Current input value 35
- Term DOF = 35
- Output Linguistic Variable 36
- Defuzzification 37
- Output = 38
- DOF(positive) 38
- CA = centroid method 39
- Recommendation 41
- Output Takagi-Sugeno Variable 42
- THEN is andand is IF : 43
- Connections 45
- Intermediate Linguistic 46
- Variable 46
- Rule Block 47
- Supported Format of Rules 48
- PID Controller 52
- ItermTIEItermEdtI 53
- BiasODItermEPCV 54
- +Δ⋅++⋅= )( 54
- Output Port 56
- Tool Bar 58
- Status Bar 58
- Tree View 58
- FuzzyDesigner Control Basics 59
- Main Menu 60
- Project 61
- FuzzyDesigner Main Menu Help 65
- Tool Bar Menu 66
- Creating a Project 69
- Opening an Existing Project 69
- Changing the Active Project 70
- Project Information 70
- Saving a Project 71
- Closing a Project 71
- Designing a Fuzzy System 72
- Fuzzy System Project Window 73
- Working with Blocks 73
- Selecting a Block 74
- Removing a Block 74
- Moving a Block 74
- Resizing a Block 74
- Block Properties 74
- Fuzzy System Components 75
- Input Port 76
- PbSPPV∗∗ − 100
- Term Editor 102
- IMPORTANT 103
- Term Properties Dialog 105
- Input Term Properties Dialog 106
- Output Term Properties Dialog 107
- Rule Editor 108
- Operations with Rules 109
- Rule Editor Tool Bar 110
- Port Order Editor 113
- Watch Dialog 115
- Watch Data History Dialog 115
- Watch History Data Dialog 115
- History Graph 117
- History Graph Context Menu 119
- Curve Vertical Range Dialog 120
- History Graph Tool Bar 121
- 2D Graph 122
- 2D Graph Context Menu 124
- 3D Graph 125
- 3D Graph Context Menu 128
- Graph Grid 129
- Graph Texture 129
- Graph Axis 129
- Graph Properties 129
- 3D Graph Control – Tool Bar 130
- Fuzzy System Simulation 131
- Simulation Watch Dialog 132
- Introduction 133
- Generating a Fuzzy Add-On 134
- Instruction 134
- Add-On Instruction Parameters 135
- Monitoring and Updating a 138
- Project Online 138
- Modifying Fuzzy System 145
- Parameters Online 145
- Importing an Add-On 146
- Instruction to FuzzyDesigner 146
- XML Format of a Fuzzy Project 147
- Glossary 149
- 150 Glossary 150
- Glossary 151 151
- 152 Glossary 152
- How Are We Doing? 153
- BUSINESS REPLY MAIL 154
- Rockwell Automation 156
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