Vibration Control of Rotor Systems With Noncollocated Sensor/Actuator by Experimental Design

1997 ◽  
Vol 119 (3) ◽  
pp. 420-427 ◽  
Author(s):  
S. M. Yang ◽  
G. J. Sheu ◽  
C. D. Yang
Keyword(s):  
Experimental Design ◽  
Vibration Suppression ◽  
Controller Design ◽  
Design Method ◽  
Control Technique ◽  
Design Parameters ◽  
Rotor Systems ◽  
Sensor Actuator ◽  
Operation Speed ◽  
And Performance

This paper presents a controller design methodology for vibration suppression of rotor systems in noncollocated sensor/actuator configuration. The methodology combines the experimental design method of quality engineering and the active damping control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. By using the locations of sensor/actuator and the feedback gains as design parameters, the controller design is shown to achieve a near optimal performance within the two-sigma confidence among all possible parameter combinations. Compared with LQ-based designs, the controller order is smaller and it is applicable to systems in an operation speed range. In addition, neither preselected sensor/actuator location(s) nor state measurement/ estimation is needed.

Design of Experiments for the Controller of Rotor Systems With a Magnetic Bearing

1997 ◽  
Vol 119 (2) ◽  
pp. 200-207 ◽  
Author(s):  
G. J. Sheu ◽  
S. M. Yang ◽  
C. D. Yang
Keyword(s):  
Controller Design ◽  
Design Method ◽  
Magnetic Bearing ◽  
Control Technique ◽  
Design Parameters ◽  
Control Engineering ◽  
Rotor Systems ◽  
Experimental Design Method ◽  
Loss Index ◽  
And Performance

A new design methodology for the vibration control of rotor systems with a magnetic bearing is developed in this paper. The methodology combines the experimental design method in quality control engineering and the conventional PD control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. A quality loss index defined by the summation of the infinity norm of unbalanced vibration is used to characterize the system dynamics. By using the location of the magnetic bearing and PD feedback gains as design parameters, the controller can be determined by a small number of matrix experiments to achieve the best system performance. In addition, it is robust to the vibration modes within a desired speed range. A rotor system consisting of 4 rigid disks, 3 isotropic bearings, and 1 magnetic bearing is applied to illustrate the feasibility and effectiveness of the experiment-aided controller design.

Vibration Control of Rotor Systems With Noncollocated Sensor/Actuator by Experimental Design

1995 ◽  
Author(s):  
S. M. Yang ◽  
G. J. Sheu ◽  
C. D. Yang
Keyword(s):  
Experimental Design ◽  
Closed Loop ◽  
Loop System ◽  
System Stability ◽  
Control Technique ◽  
Design Parameters ◽  
Closed Loop System ◽  
Rotor Systems ◽  
Sensor Actuator ◽  
Operation Speed

Abstract This paper presents a controller design methodology for vibration suppression of rotor systems in noncollocated sensor/actuator configuration. The methodology combines the experimental design method of quality engineering and the active damping control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. Compared with LQ-based design, the controller order is smaller and it is applicable to systems in an operation speed range. In addition, neither preselected sensor/actuator location nor state measurement/estimation is needed. By using the locations of sensor/actuator and the feedback gains as design parameters, the controller is shown to achieve the best possible system performance while maintaining the closed loop system stability. Analyses also show that, contrary to common believe, the performance of a closed loop system with noncollocated sensor/actuator can be superior to that with a collocated one.

scholarly journals Experiment-Aided Controller Design of Rotor Systems With a Magnetic Bearing

1995 ◽  
Author(s):  
G. J. Sheu ◽  
C. D. Yang ◽  
S. M. Yang
Keyword(s):  
Controller Design ◽  
Design Method ◽  
Magnetic Bearing ◽  
Control Technique ◽  
Design Parameters ◽  
Control Engineering ◽  
Rotor Systems ◽  
Loss Index ◽  
And Performance ◽  
Aided Design

A new design methodology for the vibration control of rotor systems with a magnetic bearing is developed in this paper. The methodology combines the experimental design method in quality control engineering and the conventional PD control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. A quality loss index defined by the summation of the infinity norm of unbalanced vibration is used to characterize the system dynamics. By using the location of the magnetic bearing and PD feedback gains as design parameters, the controller of experiment-aided design achieves the best system performance. In addition, it is robust to operating speed variations. A rotor system consisting of 4 rigid disks, 3 isotropic bearings, and 1 magnetic bearing is applied to illustrate the feasibility and effectiveness of the experiment-aided controller design.

scholarly journals A modular design method based on TRIZ and AD and its application to cutter changing robot

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110343
Author(s):  
Mei Yang ◽  
Yimin Xia ◽  
Lianhui Jia ◽  
Dujuan Wang ◽  
Zhiyong Ji
Keyword(s):  
Modular Design ◽  
Design Method ◽  
Idea Generation ◽  
Design Parameters ◽  
Problem Analysis ◽  
Concept Design ◽  
Functional Requirements ◽  
Shield Tunneling ◽  
Structural Hierarchy ◽  
And Performance

Modular design, Axiomatic design (AD) and Theory of inventive problem solving (TRIZ) have been increasingly popularized in concept design of modern mechanical product. Each method has their own advantages and drawbacks. The benefit of modular design is reducing the product design period, and AD has the capability of problem analysis, while TRIZ’s expertise is innovative idea generation. According to the complementarity of these three approaches, an innovative and systematic methodology is proposed to design big complex mechanical system. Firstly, the module partition is executed based on scenario decomposition. Then, the behavior attributes of modules are listed to find the design contradiction, including motion form, spatial constraints, and performance requirements. TRIZ tools are employed to deal with the contradictions between behavior attributes. The decomposition and mapping of functional requirements and design parameters are carried out to construct the structural hierarchy of each module. Then, modules are integrated considering the connections between each other. Finally, the operation steps in application scenario are designed in temporal and spatial dimensions. Design of cutter changing robot for shield tunneling machine is taken as an example to validate the feasibility and effectiveness of the proposed method.

Nonlinear Compensation for High Performance Feedback Systems With Actuator Imperfections

2013 ◽  
Author(s):  
Cameron L. Mock ◽  
Zachary T. Hamilton ◽  
Dustin Carruthers ◽  
John F. O’Brien
Keyword(s):  
Performance Feedback ◽  
High Performance ◽  
Vibration Suppression ◽  
Actuator Saturation ◽  
Design Method ◽  
Nonlinear Feedback ◽  
Feedback Systems ◽  
Performance Requirements ◽  
Common Causes ◽  
And Performance

Measures to reduce control performance for greater robustness (e.g. reduced bandwidth, shallow loop roll-off) must be enhanced if the plant or actuators are known to have nonlinear characteristics that cause variations in loop transmission. Common causes of these nonlinear behaviors are actuator saturation and friction/stiction in the moving parts of mechanical systems. Systems with these characteristics that also have stringent closed loop performance requirements present the control designer with an extremely challenging problem. A design method for these systems is presented that combines very aggressive Nyquist-stable linear control to provide large negative feedback with nonlinear feedback to compensate for the effects of multiple nonlinearities in the loop that threaten stability and performance. The efficacy of this approach is experimentally verified on a parallel kinematic mechanism with multiple uncertain nonlinearities used for vibration suppression.

Valve Parameters Design and Performance Test of Hydro-Pneumatic Spring with Trapezium Throttle Slice

2008 ◽  
Vol 44-46 ◽  
pp. 409-414
Author(s):  
Chang Cheng Zhou ◽  
Wei Xu
Keyword(s):  
Performance Test ◽  
Design Method ◽  
Design Parameters ◽  
Slice Thickness ◽  
Test Results ◽  
Opening Pressure ◽  
Mechanics Model ◽  
Hole Area ◽  
Valve Opening ◽  
And Performance

With the mechanics model, the analytic formula of the deformation for the trapezium throttle slice was established. By the vehicle parameters and valve opening velocity, the formula of valve opening pressure was built. Based on this, through the relation of pressure with deformation and flux at valve opening, the design formula of throttle slice thickness and throttle-hole area were established, the influencing factors to the design parameters were analyzed. A practical example of design of hydro-pneumatic spring was given, and the performance test was conducted. The analysis and test results show that the design method is effective and the formulas for throttle slice thickness and throttle-hole area are accurate enough, and have important meaning for the hydro-pneumatic spring design.

Exact H2 Optimal Solutions to a SDOF System With Electromagnetic Tuned Inerter Damper for Vibration Control

2020 ◽  
Author(s):  
Yifan Luo ◽  
Hongxin Sun ◽  
Xiuyong Wang ◽  
Anhua Chen ◽  
Lei Zuo
Keyword(s):  
Vibration Suppression ◽  
Damping Ratio ◽  
Design Parameters ◽  
Structural Damping ◽  
Single Degree Of Freedom ◽  
Sdof System ◽  
Dual Functional ◽  
Mass Damper ◽  
Physical Mass ◽  
And Performance

Abstract In order to improve the performance of the tuned mass damper (TMD) with a smaller physical mass for machining vibration suppression and energy harvesting, a dual-functional inerter-based damper, called electromagnetic tuned inerter damper (ETID), is proposed. To evaluate the performance of the ETID, the model of coupled ETID and a single degree of freedom (SDOF) system has been established. The H2 optimal design of the ETID-SDOF system has been conducted, whose goal is to minimize the value of the root mean square (RMS) of the displacement and absolute acceleration of the SDOF system. The analytical solutions of the design parameters of the ETID-SDOF system, namely, frequency ratio and damping ratio, have been derived. The control performance and robustness for the undamped SDOF system with ETID have been evaluated via parametric study compared with the undamped SDOF system with the TMD system. The potential other layouts of the ETID are also discussed. The influence of the structural damping on design parameters and performance has also been investigated.

Conceptual Design for the Performance Optimization of Compound Coaxial Helicopter

2016 ◽  
Vol 826 ◽  
pp. 40-44 ◽  
Author(s):  
Fei Cao ◽  
Ming Chen ◽  
Mei Li Wen Wu
Keyword(s):  
Conceptual Design ◽  
Performance Optimization ◽  
Design Method ◽  
Aircraft Design ◽  
Design Parameters ◽  
Design Work ◽  
Design And Optimization ◽  
Conceptual Design Phase ◽  
And Performance ◽  
Coaxial Helicopter

The purpose of this paper is to study the conceptual design and optimization of a compound coaxial helicopter. At the conceptual design phase, the compound coaxial helicopter design work was based on the conventional helicopter and fix-wing aircraft design method. The intersection of these aspects makes the design work more complex, thus, a program for the sizing and performance optimization was developed for the aircraft. The program included the total weight design, aerodynamic analysis, flight dynamics analysis, performance calculation and particle swarm optimization analysis. Under the restricted condition of the flight performance requirements, optimize the design parameters which make the weight efficiency factor decrease. Therefore, the study of optimum design process was warranted.

scholarly journals Multilayer Machine Learning-Assisted Optimization-Based Robust Design and Its Applications to Antennas and Arrays

2020 ◽  
Author(s):  
Weiqi Chen ◽  
Qi Wu ◽  
Chen Yu ◽  
Haiming Wang ◽  
Wei Hong
Keyword(s):  
Machine Learning ◽  
Design Process ◽  
Robust Design ◽  
Design Method ◽  
Computation Time ◽  
Design Parameters ◽  
Worst Case Analysis ◽  
Worst Case ◽  
And Performance ◽  
Robust Design Method

An efficient multilayer machine learning-assisted optimization (ML-MLAO)-based robust design method is proposed for antenna and array applications. Machine learning methods are introduced into multiple layers of the robust design process, including worst-case analysis (WCA), maximum input tolerance hypervolume (MITH) searching, and robust optimization, considerably accelerating the whole robust design process. First, based on a surrogate model mapping between the design parameters and performance, WCA is performed using a genetic algorithm to ensure reliability. MITH searching is then carried out using a double-layer MLAO (DL-MLAO) framework to find the MITH of the given design point. Next, based on the training set obtained using DL-MLAO, correlations between the design parameters and the MITH are learned. The robust design is carried out using surrogate models for both the performance and the MITH, and these models are updated online following the ML-MLAO scheme. Furthermore, two examples, including an array synthesis problem and an antenna design problem, are used to verify the proposed ML-MLAO method. Finally, the numerical results and computation time are discussed to demonstrate the effectiveness of the proposed method.

scholarly journals Experimental verification of model-free active vibration control approach using virtually controlled object

2020 ◽  
Vol 26 (19-20) ◽  
pp. 1656-1667 ◽  
Author(s):  
Heisei Yonezawa ◽  
Itsuro Kajiwara ◽  
Ansei Yonezawa
Keyword(s):  
Vibration Suppression ◽  
Controller Design ◽  
Design Method ◽  
Active Vibration Control ◽  
Order System ◽  
Control Performance ◽  
Control Approach ◽  
Model Free ◽  
Active Vibration ◽  
Controlled Object

The purpose of this study is to develop a simple and practical controller design method without modeling controlled objects. In this technique, modeling of the controlled object is not necessary and a controller is designed with an actuator model, which includes a single-degree-of-freedom virtual structure inserted between the actuator and the controlled object. The parameters of the virtual structure are determined so that indirect active vibration suppression is effectively achieved by considering the frequency transfer function from the vibration response of the controlled object to that of the virtual structure. Since the actuator model, which includes a virtually controlled object, is a simple low-order system, a controller with high control performance can be designed by traditional model-based optimal control theory. In this research, a mixed [Formula: see text] controller is designed considering both control performance and robust stability. The effectiveness of the proposed method is validated experimentally. The robustness of the controller is demonstrated by applying the same controller to various structures.

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