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Vibration control of two‐mass system with low inertia ratio considering practical use
Author(s) -
Morimoto Shigeo,
Hamamoto Akira,
Takeda Yoji
Publication year - 1998
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19981115)125:2<1::aid-eej1>3.0.co;2-a
Subject(s) - control theory (sociology) , inertia , vibration , torque , control system , controller (irrigation) , mass ratio , mechanical system , moment of inertia , observer (physics) , pid controller , torsional vibration , damping ratio , engineering , computer science , physics , control engineering , control (management) , acoustics , mechanical engineering , temperature control , agronomy , classical mechanics , aeronautics , quantum mechanics , artificial intelligence , biology , electrical engineering , thermodynamics
In some industrial motor‐drive systems, a torsional vibration is often generated because of an elastic element in torque transmission. Such a mechanical system is modeled as a two‐mass system and it is well‐known that the suppressing vibration of a low inertia ratio two‐mass system where the motor inertia is larger than the load inertia is very difficult. This paper proposes a speed control system of a low‐inertia ratio system, taking into account not only the dynamic responses but also a robust stability. The proposed control system is based on the H ∞ control theory and the resonance ratio control due to the feedback of the estimated shaft torque. Combining the H ∞ controller with the resonance ratio controller, the control system with high robust stability can be obtained comparing with the conventional resonance ratio control. The variable feedback gain system and the construction of the disturbance observer are discussed in order to reject the effects of noise. The simulated and experimental results show that the proposed speed control system is useful for the two‐mass system with low inertia ratio. ©1998 Scripta Technica, Electr Eng Jpn, 125(2): 1–9, 1998