Fast identification of the pull-in voltage of a nano/micro-electromechanical system

The pull-in voltage is crucial in designing an optimal nano/micro-electromechanical system (N/MEMS). It is vital to have a simple formulation to calculate the pull-in voltage with relatively high accuracy. Two simple and effective methods are suggested for this purpose; one is an ancient Chinese algorithm and the other is an extension of He’s frequency formulation.

SELECTION AND CALCULATION OF STEPPER MOTORS FOR CNC

Today, modern technologies tend to develop rapidly. The application of advanced inventions, principles, systems and approaches allows to simplify the production process, reduce the cost of manufacturing finished products, replace monotonous manual work with automated systems and devices. The basis of the power drive of such systems are electric motors: with permanent magnets, direct current, stepper, etc. When developing any electromechanical system, the task of choosing the type of drive motor, its parameters and characteristics. This article is devoted to the choice of such an electric motor for an electromechanical system for three-dimensional plastic printing. As a result of comparative analysis of parameters and characteristics of different types of motors, it is established that bipolar stepper motors are optimal for use in low-power and small-sized systems for three-dimensional printing. This is due to the simplicity of their design, reliability and low requirements for nominal and maximum torque.

A Comprehensive Review on the Optical Micro-Electromechanical Sensors for the Biomedical Application

This study presented an overview of current developments in optical micro-electromechanical systems in biomedical applications. Optical micro-electromechanical system (MEMS) is a particular class of MEMS technology. It combines micro-optics, mechanical elements, and electronics, called the micro-opto electromechanical system (MOEMS). Optical MEMS comprises sensing and influencing optical signals on micron-level by incorporating mechanical, electrical, and optical systems. Optical MEMS devices are widely used in inertial navigation, accelerometers, gyroscope application, and many industrial and biomedical applications. Due to its miniaturised size, insensitivity to electromagnetic interference, affordability, and lightweight characteristic, it can be easily integrated into the human body with a suitable design. This study presented a comprehensive review of 140 research articles published on photonic MEMS in biomedical applications that used the qualitative method to find the recent advancement, challenges, and issues. The paper also identified the critical success factors applied to design the optimum photonic MEMS devices in biomedical applications. With the systematic literature review approach, the results showed that the key design factors could significantly impact design, application, and future scope of work. The literature of this paper suggested that due to the flexibility, accuracy, design factors efficiency of the Fibre Bragg Grating (FBG) sensors, the demand has been increasing for various photonic devices. Except for FBG sensing devices, other sensing systems such as optical ring resonator, Mach-Zehnder interferometer (MZI), and photonic crystals are used, which still show experimental stages in the application of biosensing. Due to the requirement of sophisticated fabrication facilities and integrated systems, it is a tough choice to consider the other photonic system. Miniaturisation of complete FBG device for biomedical applications is the future scope of work. Even though there is a lot of experimental work considered with an FBG sensing system, commercialisation of the final FBG device for a specific application has not been seen noticeable progress in the past.

Innovative and Robust Application of Automation for Unit Level Traceability on Dual Die configuration of Micro Electromechanical System Products

Strip mapping for unit level traceability on die attach process of semiconductor companies provide quality driven impression for end users on the market. On processing of Micro electromechanical system packages, strip map generated by operators manually, certain errors and discrepancies are encountered and inevitably experienced by the production line. This causes misleading analysis on manufacturing problems and may lead to inappropriate and incorrect solutions hurting the process line. The application of modern technology and internet of things have been considered as an improvement. This is to eliminate human intervention errors caused by manual practice and promoted fool proof design of procedures. Having a user-friendly application with integration of modern technology drives significant improvement provide benefits to both supplier and customer of the manufacturing world.

Development and Research of Motion Control Algorithms of Elastic Electromechanical Systems Taking into Account the Damping Properties of the Electric Drive

The paper presents the results of studies of the effect of the counter-electromotive force (CEMF) of the dc machine on the parameters of the elastic oscillation control system of a two-mass electromechanical system, synthesized based on of solving the inverse problems of dynamic in accord with prescribed nature of controlled motion. It is shown by the method of numerical simulation that taking into account the CEMF leads to an increase of the damping properties of the electromechanical system and an increase of the gains of the feedbacks on the force in the cable. A method for the selection of these gains is proposed, based on their comparison with the gains obtained in an electromechanical system without taking into account the CEMF and an approximate assessment of its effect on the nature of the transient processes.