Active Control of Nonlinear Tendon Cable Structures: A Switching Control Approach

Subject Areas :

saeid kyanzadeh ¹ , سید سعید توکلی افشاری ² , Naser Pariz ³ , hamed ghohani ⁴

1 - Faculty of Electrical and computer Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2 - Faculty of Electrical and computer Engineering, University of Sistan and Baluchestan, Zahedan, Iran
3 - Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
4 - Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran

Received: 2023-12-11 Accepted : 2024-02-13 Published : 2024-03-11

Keywords: Active control, Tendon cable, Switching control, Nonlinear structures, Seismic control.,

Abstract :

The use of active controllers is one of the effective methods of seismic control in structures. Using this method, the control force can be adjusted at any time to the external force applied to the structure in such a way that the structure is subjected to the least possible stress or deformation. One of the important issues in seismic control of structures is the problem of nonlinear behavior of the system. In this study, a structure with a nonlinear hard tendon cable is controlled by a new control method called switching control. In this control method, the nonlinear problem is transformed into several linear problems and an optimal controller is designed for each segment or subsystem. By specifying the range and boundary of each segment, the controller corresponding to a subsystem is then activated accordingly. The advantage of this control method over other control methods applied to nonlinear systems is that in the latter the controller should be designed online and, hence, a high volume of computations is required. Using the switching control method, however, the pre-designed controllers are selected when subsystems are changed. Finally, the efficiency of the proposed method is illustrated by several numerical examples

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