Analysis and Control of axial vibrations in tunnel drilling system ?
نویسندگان
چکیده
Resonant Sonic Head drilling (RSHD) induces axial vibrations along the drillstring system which affect the accuracy and quality of pre-reinforcement required to tunnels excavation in complex soils. The main goal of this paper is to control these vibrations in order to improve this process. First, an infinite dimensional equations as vibration model are elaborated with Neumann boundary conditions. After that, a reference axial vibration as target model is constructed with respect to the system dynamic and the RSHD model. An energy-based controller is proposed to ensure the convergence of both top and bottom axial displacements toward the target. Simulations are presented to highlight the control laws results.
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