نتایج جستجو برای: servo
تعداد نتایج: 4993 فیلتر نتایج به سال:
This paper is to design a controller for servo motor in discrete-time systems. The experimental is used to obtain the transfer function to design the PID controller. The effectiveness of the design is validated using MATLAB/Simulink.This new design method gives us a simple and powerful way to design a speed controller for a servo – motor. In this study DC servo motor’s mathematical model and eq...
Nonstationary Optimal Servo Control Realizing Smooth Switching from Velocity Servo to Position Servo
Since 1986 when digital servo was introduced in mass production HDDs, various kinds of control theories have been applied to HDD servo system, and the performances had improved dramatically. A 3.5-inch HDD capacity, which was 251 MB in 1988, has 1,000,000 MB (1 TB) capacity in 2007. The Fast access (high quality motion control), very precise positioning (nanometer scale), and robustness against...
Mechanical vibration on mobile hard disk is inevitable in the practical usage, and violent vibration may cause disk slip with significant position error, which will degrade the servo control performance, prolong time to ready (TTR) of servo and lower reading and writing speed of the magnetic head. The servo tracking accuracy of hard disk drive actuator with respect to various mechanical disturb...
AC servo systems are extensively used in robotic actuators and are competing with DC servo motors for motion control because of their favorable electrical and mechanical properties. This paper presents an approach towards the control system tuning for the speed control of an AC servo motor. An approach towards speed control of servo motor in presence of system parameter variations is presented....
Servo systems play an important role in industry. They are found in most automated manufacturing systems, machine tools, and robotic systems to cite but a few examples. Servo systems fundamentals have become an integral part of industrial electronics and other related fields in engineering, such as electrical engineering or computer disciplines. Servo systems topics should be extended to all en...
A method constructing vacuum servo control system with a combined vacuum generator is proposed and the single neural adaptive PID control strategy is also proposed due to the inherent defects of the vacuum servo system in this paper. The influence of the system parameters to the characteristics of the vacuum servo system is analyzed and discussed. The simulation and the experiment show that the...
Adaptive servo ventilation for central sleep apnoea in heart failure: SERVE-HF on-treatment analysis
This on-treatment analysis was conducted to facilitate understanding of mechanisms underlying the increased risk of all-cause and cardiovascular mortality in heart failure patients with reduced ejection fraction and predominant central sleep apnoea randomised to adaptive servo ventilation versus the control group in the SERVE-HF trial.Time-dependent on-treatment analyses were conducted (unadjus...
This chapter introduces visual servo control, using computer vision data in the servo loop to control the motion of a robot. We first describe the basic techniques that are by now well established in the field. We give a general overview of the formulation of the visual servo control problem, and describe the two archetypal visual servo control schemes: image-based and position-based visual ser...
The positioning accuracy achievable by track-follow servo for flexible tape media is investigated using advanced concepts for several elements of the system. First, the servo pattern geometry in the timing-based servo system is designed in conjunction with a digital synchronous servo channel to minimize the measurement error in the position-error signal. Second, a flangeless tape path is introd...
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