scholarly journals Coriolis Force Sliding Mode Control Method for the Rotary Motion of the Central Rigid Body-Flexible Cantilever Beam System in TBM

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Chuanlu Zhou ◽  
Long Qin ◽  
Ming Chen ◽  
Jingxiang Zhang
Keyword(s):  
Rigid Body ◽  
Coriolis Force ◽  
Vibration Mode ◽  
Control Method ◽  
Sliding Mode ◽  
Flexible Beam ◽  
Beam Model ◽  
Beam Vibration ◽  
Beam System ◽  
Flexible Beam System

Beam slab structure is often encountered in a complex tunnel boring machine. Beam slab structure is subject to dynamic load, which is easy to cause fatigue damage and affect its service life. Therefore, it is necessary to control the vibration of this kind of beam slab structure. In this study, the central rigid body-flexible beam model is established for the rotating beam and plate rotating around the y-axis. Based on the Hamilton variational principle, the dynamic equation of the central rigid body-flexible beam system is established, and the dynamic model of the central rigid body-flexible beam system considering the influence of Coriolis force and centrifugal force is given. The vibration control of the central rigid body-flexible beam system is studied. The vibration mode of the rotating Euler Bernoulli beam is determined by using the elastic wave and vibration mode theory. The influence of the rotating motion on the beam vibration is analyzed, and the variable structure control law is designed to suppress the beam vibration. Numerical simulation results show that the control method can effectively suppress the first-order and second-order vibration of the beam and verify the effectiveness of the control strategy.

PID Controller Based on Flower Pollination Algorithm of Flexible Beam System

2021 ◽  
pp. 173-183
Author(s):  
Ali Akhbar Mohd Fadzli ◽  
Muhamad Sukri Hadi ◽  
Rickey Ting Pek Eek ◽  
Mat Hussin Ab. Talib ◽  
Hanim Mohd Yatim ◽  
...  
Keyword(s):  
Pid Controller ◽  
Flower Pollination Algorithm ◽  
Flexible Beam ◽  
Flower Pollination ◽  
Beam System ◽  
Flexible Beam System

Kinematic Synthesis of Planar, Shape-Changing Compliant Mechanisms Using Pseudo-Rigid-Body Models

2012 ◽  
Author(s):  
Kai Zhao ◽  
James P. Schmiedeler ◽  
Andrew P. Murray
Keyword(s):  
Rigid Body ◽  
Shape Matching ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Shape Change ◽  
Flexible Beam ◽  
Beam Model ◽  
Flexible Beams ◽  
Multi Objective Genetic Algorithm ◽  
Optimization Loop

This paper presents a procedure using Pseudo-Rigid-Body Models (PRBMs) to synthesize partially compliant mechanisms capable of approximating a shape change defined by a set of morphing curves in different positions. To generate a single-piece compliant mechanism, flexural pivots and flexible beams are both utilized in the mechanism. New topologies defined by compliant mechanism matrices are enumerated by modifying the components that make up a single degree-of-freedom (DOF) rigid-body mechanism. Because of the introduction of the PRBM for flexural pivots and the simplified PRBM for flexible beams, torsional springs are attached at the characteristic pivots of the 1-DOF rigid-body mechanism in order to generate a corresponding pseudo-rigid-body mechanism. A multi-objective genetic algorithm is employed to find a group of viable compliant mechanisms in the form of candidate pseudo-rigid-body mechanisms that tradeoff minimizing shape matching error with minimizing actuator energy. Since the simplified beam model is not accurate, an optimization loop is established to find the position and shape of the flexible beam using a finite link beam model. The optimal flexible beams together with the pseudo-rigid-body mechanism define the solution mechanism. The procedure is demonstrated with an example in which a partially compliant mechanism approximating two closed-curve profiles is synthesized.

Vibration Control of a Flexible Structure Using ER Dampers

1999 ◽  
Vol 121 (1) ◽  
pp. 134-138 ◽  
Author(s):  
Seung-Bok Choi
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Sliding Mode ◽  
Shear Mode ◽  
Flexible Beam ◽  
Short Columns ◽  
Flexible Beam System ◽  
Er Damper ◽  
External Forces ◽  
Er Fluid

This technical brief addresses the vibration control of a flexible beam structure using ER (electro-rheological) dampers. A clamped-clamped flexible beam system supported by two short columns is considered. An ER damper which is operated in shear mode is designed on the basis of Bingham model of the ER fluid, and attached to the flexible beam. After deriving the governing equation of motion and associated boundary conditions, a sliding mode controller is formulated to effectively suppress the vibration of the beam caused by external forces. In the formulation of the controller, parameter variations such as frequency deviation are treated to take into account the robustness of control system. The effectiveness of the proposed control system is confirmed by both simulation and experimental results.

Experimental Study of Active Vibration Control of a Flexible Beam System Using Iterative Learning Algorithm

2015 ◽  
Vol 660 ◽  
pp. 356-360 ◽  
Author(s):  
Mohd Sazli Saad ◽  
Hishamuddin Jamaluddin ◽  
Intan Zaurah Mat Darus ◽  
Irfan Abd Rahim
Keyword(s):  
Learning Algorithm ◽  
Active Vibration Control ◽  
Iterative Learning ◽  
The Self ◽  
Flexible Beam ◽  
Beam System ◽  
Control Schemes ◽  
Self Tuning ◽  
Active Vibration ◽  
Flexible Beam System

Experimental studies are conducted on active vibration control using self-tuning proportional integral derivative and self-tuning proportional iterative learning algorithm control schemes to suppress vibration on a flexible beam via real-time computer control. An experimental rig is developed to investigate controller performance when a change in the dynamic behavior of the flexible beam system occurs. The performance of the self-tuning control schemes is validated experimentally and compared with that of conventional control schemes through the use of an iterative learning algorithm. Experimental results clearly reveal the effectiveness and robustness of the self-tuning control schemes over conventional control schemes.

scholarly journals Attitude control for the rigid spacecraft with the improved extended state observer

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yuteng Cao ◽  
Qi Liu ◽  
Guiqin He ◽  
Qiuling Zhao ◽  
Fang Liu
Keyword(s):  
Sliding Mode Control ◽  
Rigid Body ◽  
Attitude Control ◽  
Control Method ◽  
Sliding Mode ◽  
State Observer ◽  
Extended State Observer ◽  
Solar Array ◽  
Extended State ◽  
Rigid Spacecraft

Abstract In this article, a three-axis attitude manoeuvre spacecraft consisting of a central rigid body and a rotating solar array is studied. The rotating solar array is considered a disturbance to the spacecraft. In the design of the controller, the coupled terms and the rotating solar array are considered a disturbance. The improved extended state observer is proposed by combing the sliding mode observer with the originally extended state observer to estimate the disturbance. The sliding mode control method is adopted to adjust the attitude of the spacecraft. Numerical simulations are presented to demonstrate the outstanding performance of the present observer.

Dynamic System Modeling of Flexible Beam System Using Multi-Objective Optimization Differential Evolution Algorithm

2014 ◽  
Vol 695 ◽  
pp. 605-608 ◽  
Author(s):  
Mohd Zakimi Zakaria ◽  
Mohd Sazli Mohd Saad ◽  
Hishamuddin Jamaluddin ◽  
Robiah Ahmad
Keyword(s):  
Mathematical Model ◽  
Differential Evolution ◽  
Dynamic System ◽  
System Modeling ◽  
Differential Evolution Algorithm ◽  
Flexible Beam ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Beam System ◽  
Flexible Beam System

This paper proposes an algorithm called multi-objective optimization using differential evolution (MOODE) for providing the optimal mathematical model of flexible beam system. The main reason of developing a flexible beam system is to find an appropriate controller to control the vibration produced by this system. This dynamic system is treated as a black box where the acquired input-output data is used in the modeling processes. Two objective functions are considered for optimization; minimizing the number of term of a model structure and minimizing the mean square error between actual and predicted outputs. Nonlinear auto-regressive with exogenous input (NARX) model is used to represent the mathematical model of the investigated system. To obtain an optimal model for representing the dynamic behavior of flexible beam system, the model validity tests have been applied.

Pressure control of a pneumatic valve system using a piezoceramic flapper

2004 ◽  
Vol 218 (1) ◽  
pp. 83-91 ◽  
Author(s):  
S B Choi ◽  
J K Yoo
Keyword(s):  
Tracking Control ◽  
Control Method ◽  
Sliding Mode ◽  
Pressure Control ◽  
Open Loop ◽  
Flexible Beam ◽  
Loop Control ◽  
Piezoceramic Actuator ◽  
Valve System ◽  
Pneumatic Valve

This paper presents a robust pressure control of a pneumatic valve system driven by piezoceramic actuators. The piezoceramic actuator bonded to both sides of a flexible beam makes a movement required to control the pressure at the flapper nozzle of a pneumatic system. After deriving the governing equation of motion, an appropriate size of the valve system is constructed. A sliding mode controller that is known to be robust to system uncertainties is then formulated in order to achieve accurate tracking control of a set of desired pressure trajectories. The closed-loop control bandwidth of the proposed valve system is empirically evaluated with respect to the supplying pressure and desired pressure. Tracking control performances for various pressure trajectories are presented in the time domain. In addition, the pressure control response achieved from the proposed feedback control method is compared with the response obtained from the open-loop control method.

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