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- Tetsuya Iwasaki, Shinji Hara
- IEEE Transactions on Automatic Control
- 2005

The celebrated Kalman-Yakubovic/spl caron/-Popov (KYP) lemma establishes the equivalence between a frequency domain inequality (FDI) and a linear matrix inequality, and has played one of the mostâ€¦ (More)

- Tetsuya Iwasaki, Robert E. Skelton
- Automatica
- 1994

Abs t rad -Th i s paper presents all controllers for the general ~'Â® control problem (with no assumptions on the plant matrices). Necessary and sufficient conditions for the existence of an ~Â®â€¦ (More)

- Tetsuya Iwasaki, Go Shibata
- IEEE Trans. Automat. Contr.
- 2001

This paper considers a class of linear systems containing time-varying parameters whose behavior is not known exactly. We assume that the parameters vary within known intervals and there are knownâ€¦ (More)

- Tetsuya Iwasaki, Shinji Hara, Hirokazu Yamauchi
- IEEE Trans. Automat. Contr.
- 2003

Nonminimum phase zeros are well known to limit the best achievable control performance when the control gain is allowed to be arbitrarily high. On the other hand, the phase crossover appears to be aâ€¦ (More)

- Tetsuya Iwasaki
- Automatica
- 2008

The central pattern generator (CPG) is a nonlinear oscillator formed by a group of neurons, providing a fundamental control mechanism underlying rhythmic movements in animal locomotion. We consider aâ€¦ (More)

- Tetsuya Iwasaki
- IEEE Trans. Automat. Contr.
- 1999

- Tetsuya Iwasaki, Min Zheng
- Biological Cybernetics
- 2005

Rhythmic body motions observed in animal locomotion are known to be controlled by neuronal circuits called central pattern generators (CPGs). It appears that CPGs are energy efficient controllersâ€¦ (More)

- Hideaki Tanaka, Shinji Hara, Tetsuya Iwasaki
- 2009 7th Asian Control Conference
- 2009

A class of large-scale systems with decentralized information structures such as multi-agent systems can be represented by a linear system with a generalized frequency variable. In this paper, weâ€¦ (More)

In this paper, we propose a class of parameterdependent Lyapunov functions which can be used to assess the stability properties of linear, time-invariant, single-parameter dependent (LTIPD) systemsâ€¦ (More)

- Justin Blair, Tetsuya Iwasaki
- IEEE Transactions on Automatic Control
- 2011

The essential mechanism underlying animal locomotion can be viewed as mechanical rectification that converts periodic body movements to thrust force through interactions with the environment. Thisâ€¦ (More)