NEW INTELLIGENT ADAPTIVE CONTROL SCHEMES

1
NEW INTELLIGENT ADAPTIVE CONTROL SCHEMES

• Team Members Garth Girman
• Eleanor Kurtz
• H. John Swarthout III
• Advisor Dr. Khalid Al-Olimat

2
Scope of Presentation

• Introduction
• Problem Identification
• Design Solutions
• Project Management
• Conclusions

3
Adaptive Control

• Attempts to control plant without human operator.
• Adapts to changes in operating conditions.
• Two leading assemblies, MRAC and STR, are
  considered.

4
Problems of Adaptive Control

• Single reference model in MRAC may have
  unacceptable dynamic performance.
• Single identification model in STR may not
  properly identify the plant.

5
Problem Identification

• Conventional adaptive control based on single
  model approach cannot be as effective as
  required.
• Thus, more intelligent control is needed.

6
Fuzzy Logic

• Membership Function
• Fuzzy Sets
• Degrees of Membership
• Fuzzy Rule Sets
• If A is small and B is large, then C is
  medium and D is very small.

7
Current Research

• MRAC
• Attempts with Multiple Models and Switching
  Algorithms
• Single Parameter Evaluation with Fuzzy Logic
• STR
• Multiple Combinations of Identification and
  Controller Schemes

8
Proposed Solutions

• MRAC with Multiple Online Reference Model
  Parameter Evaluation
• STR with Multiple Identification Models
• STR with Multiple Online Parameter Evaluation for
  a Single Identification Model

9
Final MRAC Solution

• Model Reference Adaptive Control
• Uses Model-Following Approach
• Multiple Model Parameter Evaluation

10
MRAC Block Diagram
11
Fuzzy Logic
Membership Function for z
12
Classical MRAC
13
Classical vs New MRAC
14
Final STR Solution

• Self-Tuning Regulator
• Uses Parameter-Following Approach
• Minimum Variance Controller
• Recursive Least Squares Identification
• Combined Multiple Identification Model and Fuzzy
  Logic Parameter Evaluation

15
STR Block Diagram
16
Fuzzy Logic
Membership Function for sf
17
Classical STR
18
Classical vs New STR
19
Stabilizer
20
Stabilizer vs New STR
21
Constraints

• Economic
• Environmental
• Sustainability
• Manufacturability
• Ethical
• Health Safety
• Social
• Political

22
Project Management

• Requirements Analysis
• System Design
• Detailed Design
• Final Presentations

23
Gantt Chart
24
Project Conclusions

• Both new MRAC and STR designs resulted in
  improved overall performance.
• New designs show promise, but more research is
  needed before implementation would be practical.

25
Future Plans

• Presentation of MRAC paper at IEEE CCA, June
  23-25.
• Submission of STR paper to Power Systems Journal.
• Allow others to use our work to further research
  in adaptive control.

26
Questions?