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3 edition of Modified independent modal space control method for active control of flexible systems found in the catalog.

Modified independent modal space control method for active control of flexible systems

Modified independent modal space control method for active control of flexible systems

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Published by School of Engineering & Architecture, The Catholic University of America, National Aeronautics and Space Administration, National Technical Information Service, distributor in Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Mechanical engineering.

  • Edition Notes

    Statementby A. Baz and S. Poh.
    SeriesNASA contractor report -- NASA CR-181065.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17682521M

    Identifying Position-Dependent Mechanical Systems: A Modal Approach Applied to a Flexible Wafer Stage Robbert Voorhoeve, Robin de Rozario, Wouter Aangenent, and Tom Oomen, Senior Member, IEEE Abstract—Increasingly stringent performance requirements for motion control necessitate the use of increasingly detailed models of the system by: 2. A novel design method for modal space controller with dynamic pressure feedback is proposed for hydraulically-driven Stewart platforms. By exploiting properties of the joint-space inverse mass matrix, an analytic modal matrix is derived which can be used for transforming the highly coupled multiple-input multiple-output (MIMO) dynamics into six independent single-input single-output (SISO Author: Ti Xian Tian, Hong Zhou Jiang, Jing Feng He, Zhi Zhong Tong.

    an experimental control facility at Jet Propulsion Laboratory (JPL) [16], which has 30 modes whose frequencies lie between and 5 Hz, and a flexible space station with 2 rigid body modes and 4 flexible modes [10], using simulation studies. II. DYNAMIC MODEL For a flexible space structure with small displacements, the linear dynamic equations. Flexible structures are widely used in many engineering systems due to their lightweight. This kind of structures is normally vulnerable to vibrations, especially when the system changes. To such systems, the fixed-parameter active vibration controllers cannot provide the best control performance and sometimes even help to excite the system.

    Get this from a library! Control of large flexible spacecraft by the independent modal-space control method. [Leonard Meirovitch; Joram Shenhar; Langley Research Center.; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.; Virginia Polytechnic Institute and State University.]. Robust and Adaptive Control Workshop Adaptive Control: Introduction, Overview, and Applications Nonlinear Dynamic Systems and Equilibrium Points • A nonlinear dynamic system can usually be represented by a set of n differential equations in the form: – x is the state of the system – t is time •If f does not depend explicitly on time File Size: 2MB.


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Modified independent modal space control method for active control of flexible systems Download PDF EPUB FB2

A modified independent modal space control (MIMSC) method is developed for designing active vibration control systems for large flexible structures. The method accounts. A new control algorithm-modified independent modal space control (MIMSC) algorithm is proposed in this paper for eliminating the effect of modal control force on the uncontrolled modes.

Numerical. A new control algorithm—modified independent modal space control (MIMSC) algorithm is proposed in this paper for eliminating the effect of modal control force on the uncontrolled modes.

Numerical example shows that the structural responses can be effectively reduced when control system design is carried out based on the proposed by: A modified independent modal space control (MIMSC) method is developed for designing active vibration control systems for large flexible structures.

The method accounts for the interaction between the controlled and residual : A. Baz, S. Poh and P. Studer. The results are compared with those obtained when using the IMSC, PPF with second order filters, the Psuedo-Inverse (PI) and a Modified Independent Modal Space Control (MIMSC).

The experimental results suggest the potential of the proposed method as a viable means for controlling the vibration of large flexible by: A Numerical and Experimental Analysis for the Active Vibration Control of a Concrete Placing Boom.

Vibration control of flexible structures with an Active Modal Tuned Mass Damper. IFAC Proceedings Volumes, Vol. 44, No. Active vibration control of a plate Cited by: In and ,Baz and co-workers [ time shared a single ceramic piezo-actuator between several modes of vibrations of a flexible cantilevered beam using a Modified Independent Modal Space Control (MIMSC) method EN].

The MIMSC modifies the IMSC to account for the control spillover between the controlled and the uncontrolled modes. Active Vibration Control Using the Modified Independent Modal Space Control (M.I.M.S.C.) Algorithm and Neural Networks as State Estimators 27 July | Journal of Intelligent Material Systems and Structures, Vol.

5, No. 4Cited by:   A method capable in theory of estimating and controlling all the modes of a distributed-parameter system is presented. A linear distributed estimator using a distributed Kalman function is defined. It is shown that a particular choice of the Kalman function, in conjunction with the independent modal-space control method, leads to an infinite set of independent second-order modal-space Cited by:   Modified independent modal space control method While calculating feedback gains using the IMSC method, the previous vibration history is not considered.

Hence, there is no priority given to controlling those modes which are excited to a greater extent by the disturbance by: In this paper, a modified Independent Modal Space Control (IMSC) that relaxes the fundamental hardware requirement of IMSC is proposed for handling the vibration and attitude control problem of large, flexible structures.

The method incorporates a new switching algorithm for dynamically selecting controlled modes and a novel design technique for determining the modal control by: 4. Baz and Poh presented a modified independent modal space control (MIMSC) method. By using this method one piezoelectric actuator can control several modes at the same time.

Sun et al. proposed a hybrid control algorithm to control the rotation of a flexible beam while suppressing the beam's vibration.

Control of Large Flexible Spacecraft by the Independent Modal-Space Control Method Leonard Meirovitch and Joram Shenhar Virginia Polytechnic Institute and State University Blacksburg, Virginia Prepared for Langley Research Center under Grant NAG Nt A NationalAeronautics and SpaceAdministration Scientific and Technical InformationBranch File Size: 4MB.

Get this from a library. Modified independent modal space control method for active control of flexible systems. [A Baz; United States. National Aeronautics and Space Administration.]. () Modified Independent Modal Space Control for Large-Flexible Asymmetrical Resonant Structures.

IEEE 10th International Conference on Mechanical and Aerospace Engineering (ICMAE), () Optimal decentralized control of large scale by: Actuators using the independent Modal Space Control (IMSC) approach is employed for the controller design [14].

Optimal control of active structures with piezoelectric actuators and sensors was studied extensively [].Gary J. Balas et al., studied Collocated versus Non-collocated Multivariable Control for Flexible Structure [18].

An-Chen. To avoid the spillover and achieve separated modal control, the independent modal space control (IMSC) was first proposed by Meirovitch and Baruh [ 17 ]. Based on IMSC, Baz and Poh [ 18 ] developed modified independent modal space control (MIMSC) to suppress the vibration modes depending on the energy level to improve the control by: 2.

Robots, aerospace structures, active earthquake-damping devices of tall buildings, and active sound suppression are examples of the application of structural dynamics and control methods.

This book addresses the structural dynamics and control problems encountered by mechanical, civil, and control. The control logic is based on two contributions, a feedforward and a feedback one.

In this study, a nonlinear flexible multibody model was created to simulate the boom’s dynamic behavior. This model was also used to develop and test the control logic. Finally, the control methodology was validated on an experimental test by: independent of the amount of damping in the system, hence the possibility of complex modes.

In Chapters 8 and 9 we developed the modal analysis method using the second order differential equation form. If the amount of damping in the system is to state space form File Size: KB. This paper presents a new control technique for reducing vibration in flexible structures.

It is based on the modal approach and is called dependent modal space control (DMSC). The well-known independent modal space control (IMSC) method, devised in the s, allows the frequency and damping of the controlled modes to be changed using diagonal.Active Control of Vibration in a Semi-Infinite Plate References Feedback Control of Flexible Structures Described in Terms of Modes Introduction Modal Control Independent Modal Space Control Model Reduction Effect of Model Uncertainty Experimental Determination of the System Model through Subspace Model Identification.An independent modal space control (IMSC) algorithm is presented, whose modal control forces are generated from a positive position feedback (PPF) strategy.

The proposed algorithm combines the attributes of both the IMSC and the PPF, and maintains the simplicity of the IMSC as it designs the controller of a complex structure at the uncoupled Author: S. Poh, A. Baz and J.

Fedor.