• Title, Summary, Keyword: Reduced Order Observer(ROO)

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Stability Proof of NFL-ROO/SMC : Part 2 (NFL-ROO/SMC의 안정도 증명 : Part 2)

  • Lee, Sang-Seung;Park, Jong-Keun;Lee, Ju-Jang
    • Proceedings of the KIEE Conference
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    • pp.976-978
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    • 1998
  • This paper presents the stability proof of a nonlinear feedback linearization-reduced order observer/sliding mode controller (NFL-ROO/SMC). The closed-loop stability is proved by a Lyapunov function candidate using an addition form of the sliding surface vector and the estimation error.

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Stability Proof of NFL-ROO-based SMC : Part 6 (NFL-ROO에 기준한 SMC의 안정도 증명 : Part 6)

  • Lee, Sang-Seung;Park, Jong-Keun;Lee, Ju-Jang
    • Proceedings of the KIEE Conference
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    • pp.988-990
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    • 1998
  • This paper presents the stability proof of a nonlinear feedback linearization-reduced order observer-based sliding mode controller (NFL-ROO-based SMC). The closed-loop stability is proved by a Lyapunov function candidate using an addition form of the sliding surface vector and the estimation error.

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A New Velocity Measurement Method using Linear Type Hall-effect Sensor for Electro-mechanical Fin Actuator (선형홀센서를 이용한 전기식 구동장치의 속도 신호 구현)

  • Gu, Jeong-Hoi;Song, Chi-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.1
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    • pp.70-75
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    • 2010
  • The objective of this paper is to propose a new velocity measurement method for an electro-mechanical fin actuator. The model of the electro-mechanical fin actuator includes uncertainties such as unknown disturbances and parameter variations in flight condition. So, an electro-mechanical fin actuator system needs robust control algorithm which requires not only position information but also velocity information. Usually, analog tachometers have been used for velocity feedback in an electro-mechanical fin actuator. However, using these types of sensors have problems such as the cost, space, and malfunction. These problems lead to propose a new velocity measurement method using linear type Hall-effect sensor. In order to verify the proposed method, several experiments are performed using Model Following Sliding Mode Controller(MFSMC). It is shown that the MFSMC with a new velocity measurement method using linear type Hall-effect sensor can satisfy the requirements without using of velocity sensor.