Experimental Validation of a Sliding Mode Control for a Stewart Platform Used in Aerospace Inspection Applications

被引:21
作者
Velasco, Javier [1 ]
Calvo, Isidro [2 ]
Barambones, Oscar [2 ]
Venegas, Pablo [1 ]
Napole, Cristian [2 ]
机构
[1] Fdn Ctr Tecnol Aeronaut CTA, Juan Cierva 1, Minano 01510, Spain
[2] Univ Basque Country, UPV EHU, Fac Engn Vitoria Gasteiz, Dept Syst Engn & Automat, Nieves Cano 12, Vitoria 01006, Spain
关键词
automatic optical inspection; kinetic theory; parallel robots; robust control; sliding mode control; HEXAPOD; SIMULATION;
D O I
10.3390/math8112051
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The authors introduce a new controller, aimed at industrial domains, that improves the performance and accuracy of positioning systems based on Stewart platforms. More specifically, this paper presents, and validates experimentally, a sliding mode control for precisely positioning a Stewart platform used as a mobile platform in non-destructive inspection (NDI) applications. The NDI application involves exploring the specimen surface of aeronautical coupons at different heights. In order to avoid defocusing and blurred images, the platform must be positioned accurately to keep a uniform distance between the camera and the surface of the specimen. This operation requires the coordinated control of the six electro mechanic actuators (EMAs). The platform trajectory and the EMA lengths can be calculated by means of the forward and inverse kinematics of the Stewart platform. Typically, a proportional integral (PI) control approach is used for this purpose but unfortunately this control scheme is unable to position the platform accurately enough. For this reason, a sliding mode control (SMC) strategy is proposed. The SMC requires: (1) a priori knowledge of the bounds on system uncertainties, and (2) the analysis of the system stability in order to ensure that the strategy executes adequately. The results of this work show a higher performance of the SMC when compared with the PI control strategy: the average absolute error is reduced from 3.45 mm in PI to 0.78 mm in the SMC. Additionally, the duty cycle analysis shows that although PI control demands a smoother actuator response, the power consumption is similar.
引用
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页数:15
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共 30 条
  • [1] An integrated approach for simulation of mechatronic systems applied to a hexapod robot
    Akdag, M.
    Karagulle, H.
    Malgaca, L.
    [J]. MATHEMATICS AND COMPUTERS IN SIMULATION, 2012, 82 (05) : 818 - 835
  • [2] [Anonymous], 2014, IFAC P, DOI DOI 10.3182/20140824-6-ZA-1003.01178
  • [3] [Anonymous], 2019, ELECTRONICS SWITZ, DOI DOI 10.3390/electronics8060605
  • [4] Bandyopadhyay B, 2015, P 10 AS CONTR C KOT, P1, DOI 10.1109/ASCC.2015.7244379
  • [5] Instantaneous stiffness analysis and simulation for hexapod machines
    Chen, J.
    Lan, F.
    [J]. SIMULATION MODELLING PRACTICE AND THEORY, 2008, 16 (04) : 419 - 428
  • [6] Model-based control of a 6-dof electrohydraulic Stewart-Gough platform
    Davliakos, Ioannis
    Papadopoulos, Evangelos
    [J]. MECHANISM AND MACHINE THEORY, 2008, 43 (11) : 1385 - 1400
  • [7] A Grobner-Sylvester hybrid method for closed-form displacement analysis of mechanisms
    Dhingra, AK
    Almadi, AN
    Kohli, D
    [J]. JOURNAL OF MECHANICAL DESIGN, 2000, 122 (04) : 431 - 438
  • [8] Modeling, Simulation, and Temperature Control of a Thermal Zone with Sliding Modes Strategy
    Florez, Frank
    Fernandez de Cordoba, Pedro
    Higon, Jose Luis
    Olivar, Gerard
    Taborda, John
    [J]. MATHEMATICS, 2019, 7 (06)
  • [9] Output integral sliding mode control to stabilize position of a Stewart platform
    Fraguela, L.
    Fridman, L.
    Alexandrov, V. V.
    [J]. JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS, 2012, 349 (04): : 1526 - 1542
  • [10] Perturbation Observer-Based Robust Control Using a Multiple Sliding Surfaces for Nonlinear Systems with Influences of Matched and Unmatched Uncertainties
    Ha Le Nhu Ngoc Thanh
    Mai The Vu
    Nguyen Xuan Mung
    Ngoc Phi Nguyen
    Nguyen Thanh Phuong
    [J]. MATHEMATICS, 2020, 8 (08)