Publication

Data-driven Approach for Disturbance Rejection for Dual-Stage Actuator Hard Disk Drives

2025

Abstract

Disturbance rejection is a crucial problem in contemporary Hard Disk Drives (HDDs) to increase data storage capacities in an information-centric society. This paper presents a control method to mitigate steady-state oscillations of a dual-stage HDD. A data-driven control design method, using only the frequency response data of HDD actuators, is used to minimize the mixed H 2 /H ∞ norms of the closed-loop system by solving a series of convex optimization problems. The design objective is to minimize steady-state oscillations of HDD heads while simultaneously ensuring actuator stroke limitations and robustness. The proposed approach is tested on the benchmark problem given during the International Federation of Automatic Control World Congress 2023. Simulation results demonstrate the efficacy of this method in deriving high-performance controllers, achieving lower tracking error variance than other presented approaches.

Official source

https://infoscience.epfl.ch/entities/publication/1b1159e5-1ea7-49b0-a6ce-43b00814a328

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2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1b1159e5-1ea7-49b0-a6ce-43b00814a328

About this result

Related concepts (32)

Hard disk drive

A hard disk drive (HDD), hard disk, hard drive, or fixed disk, is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material. The platters are paired with magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored and retrieved in any order.

Proportional–integral–derivative controller

A proportional–integral–derivative controller (PID controller or three-term controller) is a control loop mechanism employing feedback that is widely used in industrial control systems and a variety of other applications requiring continuously modulated control. A PID controller continuously calculates an error value as the difference between a desired setpoint (SP) and a measured process variable (PV) and applies a correction based on proportional, integral, and derivative terms (denoted P, I, and D respectively), hence the name.

Closed-loop controller

A closed-loop controller or feedback controller is a control loop which incorporates feedback, in contrast to an open-loop controller or non-feedback controller. A closed-loop controller uses feedback to control states or outputs of a dynamical system. Its name comes from the information path in the system: process inputs (e.g., voltage applied to an electric motor) have an effect on the process outputs (e.g., speed or torque of the motor), which is measured with sensors and processed by the controller; the result (the control signal) is "fed back" as input to the process, closing the loop.

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Data-driven Approach for Disturbance Rejection for Dual-Stage Actuator Hard Disk Drives

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