Improvement of Step Response of Voice Coil Motor (VCM) Control System

Internal Model Control (IMC) is widely used in Network Control System (NCS) with its strong robustness and simple parameter adjustment. But the accurate dynamic inversion of the IMC model is not easy to find out. To solve this problem, an improved Internal Model Controller is designed with a PID controller and feedback loop, then the Particle Swarm Optimization (PSO) is used to optimize all the parameters of the improved controller. At last, simulation results show that the improved Internal Model Controller can maintain the system stability and the performance of the step response is extremely great in terms of rapidity and anti-interference ability, compared with the classic internal model controller, which enables NCS to achieve a better control effect.

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Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator

Volume 2: Automotive Systems; Bioengineering and Biomedical Technology; Computational Mechanics; Controls; Dynamical Systems ◽

10.1115/esda2008-59471 ◽

2008 ◽

Cited By ~ 2

Author(s):

Uwe Boettcher ◽

Bart Raeymaekers ◽

Raymond A. de Callafon ◽

Frank E. Talke

Keyword(s):

Low Frequency ◽

Voice Coil Motor ◽

Step Response ◽

Time Model ◽

Modeling And Control ◽

Micro Actuator ◽

Single Output ◽

Lateral Tape Motion ◽

Dual Stage ◽

Dual Stage Actuator

We have implemented the design of a dual-stage actuator tape head for enhanced reduction of lateral tape motion (LTM) disturbance. Our design consists of a conventional voice coil motor (VCM) and a micro-actuator for coarse and fine positioning, respectively. The micro-actuator, which is mounted on the VCM, uses a piezo crystal and allows following LTM up to the kHz regime, while the VCM follows low frequency LTM. Using step response measurements and a realization algorithm, we have created a multi-input discrete-time model of the dual-stage actuator. Based on the model, we designed and implemented a dual-stage controller, using a dual-input single-output approach based on a PQ method. The dual-stage controller controls the position of both actuators and enables an increased track-following bandwidth along with a control signal that is smaller in magnitude than that for a conventional single-stage tape head.

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The Double Step Analysis of Rapid Manual Aiming Movements

The Quarterly Journal of Experimental Psychology Section A ◽

10.1080/02724988843000131 ◽

1988 ◽

Vol 40 (2) ◽

pp. 299-322 ◽

Cited By ~ 15

Author(s):

Nicholas C. Barrett ◽

Denis J. Glencross

Keyword(s):

Control System ◽

Initial Response ◽

Response Amplitude ◽

Step Response ◽

Oculomotor Control ◽

Second Step ◽

Double Step ◽

Home Base ◽

Transition Functions ◽

Corrective Response

The present paper examines the control principles underlying rapid manual tracking responses to horizontal double-step stimuli. The paper reports an experiment concerned with responses made to step-stimuli presented in quick succession. The amplitude of the second-step was varied between the initial step-position and the home-base. Double-step response parameters were analysed as a function of the determinant time interval (D) between the second step and the onset of the initial response. The initial response amplitude was observed to vary as a function of D. Amplitude transition functions were constructed representing the transition of the initial response amplitude between the two step positions; their slopes, furthermore, depended on the amplitude of the second target step. No delays in the initial reaction time with the interstimulus interval were observed. Minor delays to the onset of a corrective response were observed. These delays were in part related to a movement time constraint that is independent of any limitations in central processing capacity. The present findings for the manual control system are compared to double-step tracking analyses of the oculomotor control system.

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An Autonomous Underwater Vehicle for Competition

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.380-384.595 ◽

2013 ◽

Vol 380-384 ◽

pp. 595-600

Author(s):

Hai Tian ◽

Bo Hu ◽

Can Yu Liu ◽

Guo Chao Xie ◽

Hui Min Luo

Keyword(s):

Control System ◽

Hydrodynamic Model ◽

Degrees Of Freedom ◽

Autonomous Underwater Vehicle ◽

Autonomous Underwater Vehicles ◽

Vertical Motion ◽

Underwater Vehicle ◽

Step Response ◽

Six Degrees Of Freedom ◽

Simulink Simulation

The research of this paper was derived from the small autonomous underwater vehicle (AUV)Raider well performed in the 15th International Underwater Vehicle Competition (IAUVC),San Diego. In order to improve the performance of underwater vehicle, the control system of performance motion played an important role on autonomous underwater vehicles stable motion, and the whole control system of AUV is the main point. Firstly, based on the motion equations of six degrees of freedom, the paper simplified the dynamical model reasonably in allusion; Due to the speed of Raider to find the target was very low, this paper considered the speed was approximately zero and only considered the vertical motion. Therefore, this paper established the vertical hydrodynamic model of Raider, obtaining the transfer equation of vertical motion. Through the experiment and Matlab/Simulink simulation, this paper got the actual depth of the step response curve and simulation curve, and verified the validity of the vertical hydrodynamic model and the correlation coefficient.

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Design of Coarse-Fine Combined Synchronization Control System for Lithography Based on Cross-Coupled Sliding Mode Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.2126 ◽

2011 ◽

Vol 383-390 ◽

pp. 2126-2131

Author(s):

Zhi Pen Wu ◽

Xing Lin Chen

Keyword(s):

Control System ◽

Sliding Mode Control ◽

Sliding Mode ◽

Dynamic Performance ◽

Voice Coil Motor ◽

Synchronization Error ◽

Control Error ◽

High Position ◽

Mode Control ◽

Order Of Magnitude

In order to achieve high position precision and synchronization between the wafer stage and the reticle stage, a cross-coupled sliding mode control scheme for a coarse-fine combined synchronization servo system of lithography is proposed. To accomplish high bandwidth and high tracking precision, a conventional linear motor is combined with a voice coil motor as a coarse-fine dual-stage control system. A cross-coupled structure is presented to decrease the synchronization error during scanning operation. Sliding mode control law is designed based on the control error and the synchronization error. Simulation results show that the synchronization error and the control error have the same order of magnitude, and the dynamic performance of the control system satisfies the design requirement.

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Linear Control System Optimally Following Model Step Response

Transactions of the Society of Instrument and Control Engineers ◽

10.9746/sicetr1965.6.175 ◽

1970 ◽

Vol 6 (2) ◽

pp. 175-181 ◽

Cited By ~ 1

Author(s):

Ichiro SUGA

Keyword(s):

Control System ◽

Linear Control System ◽

Linear Control ◽

Step Response

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The Approach for Analyzing Motion Mode of High-Order Control Systems

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.596.594 ◽

2014 ◽

Vol 596 ◽

pp. 594-597

Author(s):

Sheng Guo Zhang ◽

Kai Wang ◽

Xiao Ping Dang

Keyword(s):

Control System ◽

Modal Analysis ◽

Control Systems ◽

High Order ◽

Step Response ◽

Space Theory ◽

Analysis Method ◽

Inverse Laplace Transformation ◽

State Space Theory ◽

Motion Mode

This paper aims at exploring the modal analysis approach of a motion control system. Based on the inverse Laplace transformation, the step response of a control system is derived. Then this response is associated with the modal analyses in state space theory. And then the motion mode of a control system is analyzed with the modal analysis method. Application example indicates that this approach can be used to analyze the high-order control system successfully. This facilitates the motion mode analyses of high-order control system very much.

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