| Project/Area Number |
12650451
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Control engineering
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| Research Institution | Kumamoto University |
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Principal Investigator |
ISHITOBI Mitsuaki Kumamoto University, Faculty of Engineering, Professor, 工学部, 教授 (40159752)
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| Co-Investigator(Kenkyū-buntansha) |
ZHU Qin Kumamoto University, Graduate School of Science and Technology, Research Assistant, 大学院・自然科学研究科, 助手 (00264317)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2002: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2001: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | discrete-time control / digital control / computer control / multivariable system / adaptive control / sampling / zeros / hold / 制御工学 / サンプル値制御 / 離散化システム |
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| Research Abstract |
1. Analysis of stability of zeros for multivariable systems with fractional-order holds
When a fracional-order hold is applied as a hold, the stability of zeros is analyzed theoretically. It is cleared that the fractional-order hold can improve the stability properties of zeros compared with a zero-order hold.
2. Analysis of stability of zeros for multivariable systems with approximate fractional-order holds
When a fracional-order hold is implemented by an approximate fractional-order hold, the stability of multivariable zeros is analyzed theoretically. It is cleared that the approximate fractional-order hold has the same properties of stability of zeros as the ideal fractional-order hold. As a result, the approximate fractional-order holds can improve the stability properties of zeros compared with a zero-order hold.
3. Experimental confirmation of the advantages of the approximate fractional-order holds through adaptive control
We implemented the approximate fractional-order holds with two and three steps, and confirmed the effectiveness of the approximate fractional-order holds experimentally.
4. Development of softwere for control system analysis with fractional-order holds
MATLAB software was developed for system analysis when fractional-order holds or approximate fractional- order holds are used for design of multivariable digital control systems. The software is opened in the internet. The address is as follows:
http://www.mech.kumamoto-u.ac.jp/Info/lab/control/zeroopen.html
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