Dynamical Analysis and Control of a Parametrically Excited Elastic Pendulum

2017 ◽  
Author(s):  
Thiago Cesar Lousada Marsola ◽  
Mateus de Freitas Virgílio Pereira ◽  
Angelo Marcelo Tusset ◽  
José Manoel Balthazar
Keyword(s):  
Dynamical Analysis ◽  
Parametrically Excited ◽  
And Control ◽  
Elastic Pendulum

Dynamical analysis and control synthesis of RO desalination process against water hammering

Desalination ◽  
2017 ◽  
Vol 402 ◽  
pp. 133-142 ◽  
Author(s):  
Bui Duc Hong Phuc ◽  
Sam-Sang You ◽  
Tae-Woo Lim ◽  
Hwan-Seong Kim
Keyword(s):  
Dynamical Analysis ◽  
Control Synthesis ◽  
And Control

Dynamics and Control of Electroporation

2008 ◽  
Author(s):  
Susan Basile ◽  
Xiaopeng Zhao ◽  
Mingjun Zhang
Keyword(s):  
Drug Delivery ◽  
Bifurcation Analysis ◽  
Control Strategy ◽  
Control Algorithm ◽  
Pore Radius ◽  
Dynamical Analysis ◽  
Dimensional Model ◽  
Electric Pulses ◽  
Dynamics And Control ◽  
And Control

Electroporation has become an important tool for drug delivery such as gene therapy. The technique uses electric pulses to create transient pores in the cell membrane. To ensure proper uptake of targeted molecules, it is essential to create sufficiently large pores, which remain open long enough. In this work, we explore evolution of the pores using dynamical analysis and control of electroporation based on a simplified two-dimensional model. A detailed bifurcation analysis reveals the existence of saddle-node bifurcations, which induce hysteresis into the system dynamics. The bifurcation analysis also sheds light on the relation between the applied voltage and the pore radius. Based on the dynamics and bifurcation analysis, we design a feedback control algorithm that is able to achieve any desired pore size. Numerical examples demonstrate the control strategy is robust. The control algorithm will improve the operation of electroporation in drug delivery.

The Control and Dynamical Analysis on Magnetic Bearing Flexible Rotor System Combining the Whirling with Swing

2011 ◽  
Vol 189-193 ◽  
pp. 1592-1596
Author(s):  
Hui Qun Yuan ◽  
Ying Li ◽  
Dong Li ◽  
Wen Bo Wu
Keyword(s):  
Rotation Axis ◽  
Magnetic Bearing ◽  
Dynamical Analysis ◽  
Rotational Axis ◽  
Flexible Rotor ◽  
Precision Control ◽  
And Control ◽  
Bearing Rigidity ◽  
Bearing System ◽  
Control Quantity

Considering gyroscopic effect and flexibility of the shaft, the eight freedoms dynamic model is established. The dynamic characteristic and control quantity in different bearing rigidity and rotation axis are studied and discussed by optimal control theory. Furthermore, the controlling and the responding are discussed. The simulation results show that the bearing rigidity has great effect on the control quantity so that the elasticity of bearing must be considered. The asymmetry rigidity of rotational axis has little influence on stability. The conclusion may bring up theoretical references for precision control for rotor magnetic bearing system.

Study upon the Dynamic Answer of Plane Manipulators

2012 ◽  
Vol 463-464 ◽  
pp. 1304-1308 ◽  
Author(s):  
Ionut Geonea ◽  
Alexandru Margine ◽  
Alin Ungureanu
Keyword(s):  
Mechanical System ◽  
Control Systems ◽  
Mechanical Systems ◽  
Dynamical Analysis ◽  
Functional Description ◽  
Plane Manipulator ◽  
And Control

The paper illustrates the structure of plane mechanical systems used to manipulators. In the first part are presented some kinematics schemes used to plane manipulators. These mechanisms are used to manipulators, positioning and control systems. In generally these mechanisms have two or three degree of mobility. The purpose of the paper is to study the dynamics of a plane manipulator mechanical system used to manipulate garbage containers. It is presented the kinematics scheme of a plane manipulator, used to this purpose and is presented the mechanism functional description. In the second part is presented the kinematical and dynamical analysis for the plane manipulator mechanism. In the last part of the paper are presented graphical results for the dynamics parameters.

scholarly journals Dynamical Analysis and Stabilizing Control of Inclined Rotational Translational Actuator Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Bingtuan Gao ◽  
Fei Ye
Keyword(s):  
Control Design ◽  
Dynamical Analysis ◽  
Lagrange Equations ◽  
Control Lyapunov Function ◽  
Stabilizing Controller ◽  
Control Techniques ◽  
Stabilizing Control ◽  
Rotor Angle ◽  
General Force ◽  
And Control

Rotational translational actuator (RTAC) system, whose motions occur in horizontal planes, is a benchmark for studying of control techniques. This paper presents dynamical analysis and stabilizing control design for the RTAC system on a slope. Based on Lagrange equations, dynamics of the inclined RTAC system is achieved by selecting cart position and rotor angle as the general coordinates and torque acting on the rotor as general force. The analysis of equilibriums and their controllability yields that controllability of equilibriums depends on inclining direction of the inclined RTAC system. To stabilize the system to its controllable equilibriums, a proper control Lyapunov function including system energy, which is used to show the passivity property of the system, is designed. Consequently, a stabilizing controller is achieved directly based on the second Lyapunov stability theorem. Finally, numerical simulations are performed to verify the correctness and feasibility of our dynamical analysis and control design.

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