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Download Emerging actuator technologies: a micromechatronic approach by José L. Pons PDF

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By José L. Pons

Actuators are units that convert electricity into mechanical paintings, ordinarily utilized in electric, pneumatic and hydraulic structures. because the call for for actuator applied sciences grows in biomedical, prosthetic and orthotic purposes, there's an expanding want for advanced and complicated items that practice successfully additionally while scaled to micro and nano domain names. supplying a accomplished evaluation of actuators for novel purposes, this wonderful ebook: * provides a mechatronic method of the layout, keep an eye on and integration of a variety of applied sciences masking piezoelectric actuators, form reminiscence actuators, electro-active polymers, magnetostrictive actuators and electro- and magnetorheological actuators. * Examines the features and function of rising actuators upon scaling to micro and nano domain names. * Assesses the relative advantages of every actuator expertise and descriptions potential program fields. providing a close research on present advances within the box, this book will attract practicing electric and electronics engineers constructing novel actuator platforms. Mechanical and automation engineers, computing device scientists and researchers also will locate this an invaluable source.

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Sensors are therefore not strictly necessary. 1 Sensing As noted previously, sensors are transducing devices that monitor the status of a parameter of the plant. In a general motion control scheme, the reference trajectory must be compared to the actual one. Reactive measures to counteract deviations can then be implemented on the basis of this comparison. The use of sensors in feedback control motion systems provide means for improving the robustness of the whole process. Additionally, they enable the implementation of disturbance rejection strategies.

This book focuses particularly on analysis of the actuator subsystem within a mechatronic system. The actuator subsystem itself can be shown to exhibit the same mechatronic characteristics as a motion control system. This means that the actuator can be analyzed as a mechatronic system, and it will benefit from the intrinsic cross-fertilization between engineering disciplines (Reynaerts et al. (1998)). 18 ACTUATORS IN MOTION CONTROL SYSTEMS: MECHATRONICS Impedance The concept of an actuator as a true mechatronic system will be illustrated with the example of a resonant piezoelectric drive.

Wherever a discontinuity occurs in the change in length of an actuator (see Chapter 4), switching techniques may be the only possible solution for accurate positioning tasks. 15, leads to mechanical states that are not attainable in equilibrium. In such a case, switching techniques can maintain the mechanical state without equilibrium within the margin of mechanical state error allowed by the application (Mitwalli (1998)). 15 Discontinuity in volume–phase transformations leading to nonattainable mechanical states.

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