Recently in the field of sheet metal forming, servo press, which can control the speed and position of the tool using a servo motor, is attractive method. Development process of servo press method is accelerated as the capacity of servo motor become bigger. In the future, it’s expected as a great alternative plan to replace conventional press method in order to improve quality, increase product...

The accurate model-based servo-control of wheeled mobile robots (WMRs) relies upon the formulation of realistic kinematic and dynamic models. We* identify six special WMR characteristics (closed-chains, hig her-pair joints, unactuated and unsensed joints, friction, and pulse-width modulation) that require methodologies for modeling and control beyond those conventionally applied to stationary m...

Hydraulic systems driven by servo valves provide highly accurate control over enormous forces. A servo valve system consists of a transducer, a servo amplifier, a servo valve, and an actuator with a connected load. It is a closed-loop system used for the precise control of the output (load) parameter, such as position, velocity, or force, in response to a command signal. The output is converted...

ABSTRACT: This is one of a series of white papers on systems modelling, analysis and control, prepared by Control Systems Principles.co.uk to give insights into important principles and processes in control. In control systems there are a number of generic systems and methods, which are encountered in all areas of industry and technology. These white papers aim to explain these important system...

Conventional Proportional/Proportional-Integral (P/PI) speed controller of today’s servo drives should be manually tuned the controller switching set-point by trial-and-errors, which may translate the drive system down-time and loss of productivity. The adjustable drive performance is heavily dependent on the quality of the expert knowledge and becomes inadequate in applications where the opera...

In order to study the numerical control (NC) servo press hydraulic control system and its control algorithm. The numerical control servo press performance and control principle of hydraulic control system are analyzed. According to the flow equation of the hydraulic control valve, hydraulic cylinder flow continuity equation and the force balance equation of the hydraulic cylinder with load pres...

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...

An H2 servo controller is proposed for networked control systems. The network-induced delay is assumed to be time-varying and vary in the known range. The proposed controller guarantees stability and H2 performance for all timevarying delay in the known range. The proposed controller is verified using a simple networked motor control system.

The paper considers problem of a servo drive speed limitation within the permissible values rate in condition of different impacts types. A fuzzy logic controller with speed limitation suggested for such electric drive. Control system with tis controller was tested on the laboratory stand of telescope rotary support axis.

Electric power is mainly derived from a combination of an engine and a motor. The motor converts electrical power into mechanical energy, which is widely used in home appliances and industrial mechanical tools. When addressing specific applications, motor-driven tools generally need to make speed changes or have accurate positioning. In these applications, it is necessary to have a highly effic...