CDC2000 Disk Drive Control

Disk Drive Control
Home Full List of Titles 1: Proceedings of CDC2000 Discrete Event Systems Control in Communication Systems Optimal Control and Applications I Optimisation Approaches and Methods Model Predictive Control Advances in Linear Estimation Stochastic and Uncertain Systems Nonlinear Control and Applications Nonlinear Estimation and Filtering Formation Control and its Applications New Approaches to Fuzzy Control Manufacturing Systems Automotive Applications Stability Issues in Hybrid Control Recent Advances in Stochastic Networks Optimal Control and Applications II Robust Controller Design - mu, L1 and H2 Constrained and Receding Horizon Control Identification and Control around the World Markov Decision Processes Nonlinear Optimisation Observers for Nonlinear Systems Motion Planning Neural / Fuzzy Stability and Control Motor Control Control of Quantum Phenomena I Hybrid Systems Methods Control in Communication Networks Robustness and Optimisation Bumpless Transfer, Antiwindup and Saturation Adaptive Control: Linear Systems Estimation and Closed Loop Identification Control of Markov Processes Nonlinear Filtering and Control Modelling, Identification and Validation of Nonlinear Systems Differential Geometric Control Theory for Mechanical Systems Nonlinear Output Feedback Control Pneumatics and Compression Systems Control of Quantum Phenomena II Stability of Hybrid Systems Performance Analysis in Communication Networks Adaptive Control of Nonlinear Systems LMI Methods in Design Robust Control of Time Delay Systems Subspace Identification Methods Nonlinear Stochastic Filtering and Estimation Bifurcations, Chaos and Control I New Progress in Synthesis of Nonlinear Systems I Implementation Issues of Sliding Mode Control Theory Control of Mixing in Shear Flows Novel Neural Network Control Techniques for Industrial Motion Control Systems Physiological Control Systems Optimal Control of Hybrid Systems Stochastic Models for Communication Networks Control and Stabilisation of Nonlinear Systems New Directions in Robust Control Linear Systems Theory Advanced Topics in Systems Theory Estimation in Action Bifurcations, Chaos and Control II New Progress in Synthesis of Nonlinear Systems II Numerical Design and Analysis Techniques for Nonlinear Systems Analysis and Control of Underactuated Systems Sliding Mode Control I Challenges in the Application of Control to Computer Systems Estimation and Diagnosis of Discrete Event Systems Communications and Games Optimal Control Stochastic Systems Model Reduction Methodologies Identification and Subspace Methods Applications of Nonlinear Adaptive Control Advances in Nonlinear Output Feedback Design The Behavioural Approach to Systems and Control Vision Based Estimation and Control: Recent Advances and Open Problems Agile Control of Military Operations Sliding Mode Control II Model-based Fault Diagnosis of Industrial Processes Discrete Event Systems / Petri Nets System Identification and Confidence Estimation New Approaches to H-Infinity Control I Probabilistic Approaches to Robust Control Time Delay System Stabilisation Identification Methods Controlled Stochastic Processes Output Feedback of Nonlinear Systems Topics in Nonlinear Stabilisation Mobile Robots: Tracking Control Robust Control of Nonlinear Systems Power Systems Stabilisation and Control Disk Drive Control Hybrid Control Applications Discrete Time Systems New Approaches to H-Infinity Control II Linear Systems with Saturating Actuators New Theories in Distributed Parameter Systems Applications of Estimation and Identification Stochastic Control and Tuning Methodologies Control of Nonlinear Systems Iterative Learning and Control Coordinating Robot Systems Nonlinear Time Varying Systems Novel Applications of Neural Networks Aerospace Applications Switched Systems Implicit and Descriptor Systems LQG Periodic Systems and Disturbances New Horizons for Distributed Parameter Systems State Estimation Learning and Neuro-Control Nonlinear Control and Stabilisation I Tracking Vision Servoing Controllability of Nonlinear Systems Control of Flexible Systems Electro-Mechanical Systems Robust Control Methods and Applications Fault Detection and Diagnosis Optimisation and Applications Robust Stability Analysis Numerical Methods in Control Filtering in Continuous Time Stochastic Systems Interplay between Control and Signal Processing Fault Detection and Analysis Nonlinear Dynamical Systems Nonlinear Time Delay Systems Computational Issues in Nonlinear Control Disturbance Rejection Process Control Industry Applications Linear Parameter Varying Systems Linear Control Systems Dynamic and Nonlinear Programming Model Reduction Applications New Techniques for Control and Systems: Numerical Linear Algebra Estimation and Identification using Hidden Markov Models Applications of Stochastic Control Topics in Linear Design Nonlinear Control and Stabilisation II Ambulatory Robot Systems Chaotic and Oscillatory Systems Biomedical System Control Integrated Control and CPU Scheduling Linear Design Techniques Adaptive Disturbance / Noise Compensation Nonlinear Model Predictive Control Sensitivity Design, Analysis and Limitations Analysis of Linear Systems Linear Matrix Inequalities in Design Lyapunov's 2nd Method Robotics: Tracking Control Lagrangian and Hamiltonian Theory Variable Structure Control Machine Vision Signal Processing Methods in Control Applied Nonlinear Control Author Index A B C D E F G H I J K L M N O P Q R S T U V W X Y Z	Improvement Of Servo Performance Via Nonlinear Feedback Control In Hard Disk Drive Servo Systems Authors: V. Venkataramanan, Ben M. Chen, Tong-Heng Lee, Guoxiao Guo, Volume: 1, Page 3088 Paper number 1244 Abstract: In hard disk servo systems,two or more types of controllers are used for track seek, track follow and track settling modes. Due to this nature there is a need to consider the problem of mode switching among these controllers. In this paper, a composite nonlinear feedback controller is used to perform the above functions. The goal of this paper is to propose unified controller to perform different modes of operation in HDD servo system with the saturation constraints on control signal. This is by the design of composite nonlinear feedback control law based on a nominal linear controller. In the face of actuator saturation,this control law not only increases the speed of closed-loop response but also improves the settling performance. CD001244.PDF (From Author) TOP A Predictive Approach to Discrete-Time Time-Optimal Servomechanism Authors: Sang-Hoon Chu, Young-Hoon Kim, Volume: 1, Page 3094 Paper number 1477 Abstract: This paper presents a novel approach to discrete-time time-optimal servomechanism. Differently from existing approaches to discrete-time time-optimal control, we attempt to find the control law minimizing point-wise the distance between the one-step-ahead prediction of the system state and a given reference velocity trajectory. The performance of the proposed controller is shown to be mathematically well supported and, moreover, its practical significance is demonstrated through realistic simulation based on the head-positioning servo in a hard disk drive. CD001477.PDF (From Author) TOP An Optimal Multirate Control Design with Robustness Specification for Sampled-Data HDD Servo Systems Authors: Qi Hao, Guoxiao Guo, Ruifeng Chen, Shixin Chen, Teck-Seng Low, Volume: 1, Page 3100 Paper number 1450 Abstract: One major contributor of the Track Mis-registration (TMR) in an Hard Disk Drive (HDD) servo system is the position error signal (PES) 3 sigma, or 3 times the standard deviation of the PES. This paper presents an optimal robust multirate control design to minimize 3 sigma PES in HDD servo systems with stochastic distribution of plant parameters via genetic algorithm (GA) and random neighborhood search (RNS) considering robust stability restrictions. The expected H2 norm of the sampled-data system was set as the robust performance index and the H infinity norm of weighted complementary sensitivity function of the plant input was set as the robust stability index for the multiplicative perturbation. The genetic algorithm with sharing scheme and tabu list which could improve diversity of solutions and global search ability was employed for a coarse optimization of the controller parameters and random neighborhood search did a fine-tuning of the controller. The numerical results show that, the proposed method could improve the robust performance of the sampled-data HDD servo system considerably while keeping the robust stability. CD001450.PDF (From Author) TOP On Improving Head-Disk Interface in Hard Disk Drives Using Active Control Authors: Shan-Min Swei, Peng Gao, Volume: 1, Page 3106 Paper number 9803 Abstract: How to improve head disk interface (HDI) characteristics in the mechanical design of hard disk drives (HDDs) has become increasingly important due to ever-growing demand for storage density and access speed. In this paper, an active actuation and control of the suspension structure in HDDs utilizing the piezo-films is investigated. Its applications in reducing head-disk friction/wear and suppressing induced vibrations are studied. An analytical model for a cantilever beam like structure with the bonded piezo-films is presented. A direct output feedback control is proposed and its effectiveness in suppressing induced vibrations is demonstrated both theoretically and experimentally. CD009803.PDF (From Author) TOP Performance-Robustness Trade-Off in the Control of a CD Player Using Mixed Objectives Design Authors: Marco Dettori, Tycho R. Stribos, Volume: 1, Page 3112 Paper number 1307 Abstract: The purpose of this paper is to investigate the possibilities offered by multi-objective control in performing a systematic trade-off between performance and robustness issues in the control design of a CD player. In this control design problem the main goal is to keep the time domain amplitude of a tracking error signal bounded in the presence of disturbances and norm bounded uncertainties. Since these two requirements are conflicting, it is interesting to investigate what the achievable trade-offs between them are. Using the mixed objective approach, we construct Pareto optimal curves for this control problem, in correspondence to different choices of norms to represent the specifications. In this way we gain a considerable insight on what is achievable in this design. The resulting controllers are digitally implemented on the real system and validated on the basis of experimental results. CD001307.PDF (From Author) TOP Fixed Order H-Infinity Control Design for Dual-Stage Hard Disk Drives Authors: Max Rotunno, Raymond A. de Callafon, Volume: 1, Page 3118 Paper number 9101 Abstract: A commonly accepted solution to obtaining extremely high track densities in future hard disk drives will be the use of dual--stage actuators to accomplish track following. In these designs a high-bandwidth and highly accurate micro-actuator is used in combination with a traditional Voice Coil Motor (VCM). The nature of the servo controller becomes multivariable since both the VCM and the micro-actuator have to be controlled simultaneously. In this paper a systematic approach for the design of a dual--stage controller via an H_(infinity)-norm optimization is presented. To address the complexity limitations of servo controllers in HDD, a fixed and low order control is presented along with the choice of the weighting functions to specify the performance of the dual--stage actuator. The design procedure is illustrate on a piezoelectric micro--actuator designed by Hutchinson Technologies Inc (HTI). CD009101.PDF (From Author) TOP Design of A Dual-Stage Actuator Control System with Discrete-Time Sliding Mode for Hard Disk Drives Authors: Seung-Hi Lee, Sang-Eun Baek, Young-Hoon Kim, Volume: 1, Page 3120 Paper number 1540 Abstract: This paper considers discrete-time design of a dual-stage actuator control system with sliding mode for hard disk drives. A state estimator based sliding mode controller is designed in the discrete time domain. A design methodology is also addressed to complete the design of the control system. The performance of the proposed sliding mode control algorithm is tested through simulations. Very fast seek in microactuator range is attained while not exciting the microactuator resonance. Through the results of simulations it is demonstrated that the proposed discrete-time sliding mode control system is a very prospective technique for disk drives with dual-stage actuators. CD001540.PDF (From Author) TOP