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Identification of motion platform using the signal compression method with pre-processor and its application to siding mode control

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Abstract

In case of a single input single output (SISO) system with a nonlinear term, a signal compression method is useful to identify a system because the equivalent impulse response of linear part from the system can be extracted by the method. However even though the signal compression method is useful to estimate uncertain parameters of the system, the method cannot be directly applied to a unique system with hysteresis characteristics because it cannot estimate all of the two different dynamic properties according to its motion direction. This paper proposes a signal compression method with a pre-processor to identify a unique system with two different dynamics according to its motion direction. The pre-processor plays a role of separating expansion and retraction properties from the system with hysteresis characteristics. For evaluating performance of the proposed approach, a simulation to estimate the assumed unknown parameters for an arbitrary known model is carried out. A motion platform with several single-rod cylinders is a representative unique system with two different dynamics, because each single-rod cylinder has expansion and retraction dynamic properties according to its motion direction. The nominal constant parameters of the motion platform are experimentally identified by using the proposed method. As its application, the identified parameters are applied to a design of a sliding mode controller for the simulator.

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Authors and Affiliations

  1. Graduate School of Intelligent Mechanical Engineering, Pusan National University, 609-735, Pusan, Korea

    Min Ku Park

  2. School of Mechanical Engineering, Pusan National University, 609-735, Pusan, Korea

    Min Cheol Lee

Authors
  1. Min Ku Park
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  2. Min Cheol Lee
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Correspondence to Min Cheol Lee.

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Park, M.K., Lee, M.C. Identification of motion platform using the signal compression method with pre-processor and its application to siding mode control. KSME International Journal 16, 1379–1394 (2002). https://doi.org/10.1007/BF02985130

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  • DOI: https://doi.org/10.1007/BF02985130

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