Smith Predictor Based Sliding Mode Control for Torsional Vibration Control of Drillstring with Input Delay

2019 ◽  
Author(s):  
Roya Sadeghi Mehr ◽  
Amirhossein Nikoofard ◽  
Ali Khaki Sedigh
Keyword(s):  
Sliding Mode Control ◽  
Vibration Control ◽  
Torsional Vibration ◽  
Sliding Mode ◽  
Smith Predictor ◽  
Input Delay ◽  
Mode Control

Predictive-based sliding mode control for mitigating torsional vibration of drill string in the presence of input delay and external disturbance

2020 ◽  
pp. 107754632096099
Author(s):  
Roya Sadeghimehr ◽  
Amirhossein Nikoofard ◽  
Ali Khaki Sedigh
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
External Disturbance ◽  
Drill String ◽  
Smith Predictor ◽  
Input Delay ◽  
Drilling Process ◽  
Parameter Uncertainties ◽  
Stick Slip ◽  
Mode Control

Dealing with torsional vibrations and stick–slip oscillations of a drill string system is a challenging engineering task in the oil drilling process because of the harmful and costly consequences of such vibrations. In this article, the drill string system is modeled using a lumped-parameter model with four degrees of freedom, and the bit–rock contact is represented by a nonlinear function of a bit velocity. Also, tracking the desired velocity of a drill string system with known constant input delay is addressed in the presence of external disturbance and parameter uncertainties by applying the Smith predictor–based sliding mode control method. The performance of the smith predictor–based sliding mode control with input delay and disturbance in tracking the desired velocity and controlling the stick–slip oscillations is compared with the sliding mode control with/without input delay. The system output’s sensitivity to the delay parameter is also investigated, indicating how the bit velocity changes concerning the delay parameter. The proper choice of adaptation gain is determinative in the performance of the controller, and its impact is investigated. Moreover, the robustness of the smith predictor–based sliding mode control is shown by changing the weight on the bit parameter. Simulation results demonstrate the effectiveness of the proposed method.

scholarly journals Output Feedback Sliding Mode Control for Bending and Torsional Vibration Control of 6-story Flexible Structure

2002 ◽  
Vol 45 (1) ◽  
pp. 150-158 ◽  
Author(s):  
Kosuke IWAMOTO ◽  
Yuji KOIKE ◽  
Kenzo NONAMI ◽  
Koji TANIDA ◽  
Itaru IWASAKI
Keyword(s):  
Sliding Mode Control ◽  
Vibration Control ◽  
Torsional Vibration ◽  
Output Feedback ◽  
Sliding Mode ◽  
Flexible Structure ◽  
Mode Control

scholarly journals Smith predictor with sliding mode control for processes with large dead times

2017 ◽  
Vol 68 (6) ◽  
pp. 463-469 ◽  
Author(s):  
Utkal Mehta ◽  
İbrahim Kaya
Keyword(s):  
Sliding Mode Control ◽  
Disturbance Rejection ◽  
Sliding Mode ◽  
Smith Predictor ◽  
Mode Control ◽  
Input Control ◽  
Power Rate ◽  
Overall Performance ◽  
Parameter Values ◽  
Optimum Input

AbstractThe paper discusses the Smith Predictor scheme with Sliding Mode Controller (SP-SMC) for processes with large dead times. This technique gives improved load-disturbance rejection with optimum input control signal variations. A power rate reaching law is incorporated in the sporadic part of sliding mode control such that the overall performance recovers meaningfully. The proposed scheme obtains parameter values by satisfying a new performance index which is based on biobjective constraint. In simulation study, the efficiency of the method is evaluated for robustness and transient performance over reported techniques.

Vibration Control of a Translating Beam With an Active Control Strategy on the Basis of the Fuzzy Sliding Mode Control

2013 ◽  
Author(s):  
Liming Dai ◽  
Lin Sun
Keyword(s):  
Sliding Mode Control ◽  
Vibration Control ◽  
Active Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Nonlinear Dynamic System ◽  
Fuzzy Sliding Mode Control ◽  
Mode Control ◽  
Fuzzy Sliding Mode ◽  
Active Control Strategy

An active control strategy is developed for nonlinear vibration control of an axially translating beam applied in engineering field. The control strategy is established on the basis of Fuzzy Sliding Mode Control. The nonlinear model governing the beam system is described with a six-degree nonlinear dynamic system. Corresponding to the multi-degree nonlinear system, the active control strategy is developed. The proposed control strategy is proven to be effective in controlling and stabilizing the nonlinear motions especially chaotic motion of the beam.

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