The rapid layout synthesis of a microresonator from high-level functional specifications and design constraints is demonstrated. Functional parameters such as resonant frequency, quality factor, and displacement amplitude at resonance are satisfied while simultaneously minimizing an objective function. The optimal synthesis tool allows exploration of micromechanical design issues and objectives...

The choice of motor and drive as well as mechanical transducer is a very important step in servo system design, because non-optimal selection leads to poor system performance and increased installation and maintenance costs. It is still an iterative process with skill in choice dependant on obtaining correct specifications and safety margins. Fundamental principles and procedures in selecting p...

 Applications of the Virtual Test Bed (VTB) to a power electronic circuit and an electric drive system are described. The VTB is a software environment that has been developed for design, analysis, and virtual prototyping of largescale multi-technical systems. It has the capability of integrating models, which have been created in a variety of languages such as SPICE, ACSL, and SABER, into one...

When building the robot for outdoor competition the designer can choose from a variety of chassis. The differential drive and Ackerman steering drive are among the most popular. The paper describes our experiences with the custom built chassis that uses Ackerman steering principle together with independently driven back wheels. The chassis represent the base of Bender II mobile robot, used in R...

Zenan Qi,1,* Alexander L. Kitt,2,† Harold S. Park,1,‡ Vitor M. Pereira,3,§ David K. Campbell,2,‖ and A. H. Castro Neto2,3,4,¶ 1Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, USA 2Department of Physics, Boston University, 590 Commonwealth Ave., Boston, Massachusetts 02215, USA 3Graphene Research Centre and Department of Physics, National University of Singa...

Direct drive motors became very popular due to the simple mechanical structure that avoids the use of a speed reducer that can cause position errors and instability. With the use of a direct drive motor, undesired backlash, and flexibility are reduced significantly. However, since load variation is linked to the motor axis directly, an advanced algorithm has to be applied in the motion control ...

In this paper, one-cycle control (OCC), as a constant-frequency PWM control strategy for current control of a six-switch brushless dc (BLDC) motor drive is investigated. Developed current regulator is a unified controller and PWM modulator. Employing the one-cycle control strategy, decreases the torque ripple resulted from the conventional hysteresis current controllers and therefore, the vibra...

This paper presents a two loop optimal control structure for variable speed fixed pitch horizontal axis wind turbines (HAWT) having flexible drive trains. That structure, formed by a low frequency loop and a high frequency loop, is the result of the frequency separation principle adopted in the wind modelling. The optimality of the whole system is expressed by the trade-off between the energy c...

This document deals with solutions to control a switched reluctance motor using the TMS320C24x. This new DSP family enables cost-effective design of intelligent controllers for switched reluctance motors. Two speed control algorithms are presented, they allow the Switched Reluctance motor drive to reach high efficiency, smooth operation, very good dynamic behavior, very high speed and low acous...

D. A. Bahamon,1,* Zenan Qi,2 Harold S. Park,2 Vitor M. Pereira,3,4 and David K. Campbell5 1MackGraphe—Graphene and Nano-Materials Research Center, Mackenzie Presbyterian University, Rua da Consolação 896, 01302-907, São Paulo, SP, Brazil 2Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, USA 3Centre for Advanced 2D Materials & Graphene Research Centre, Nation...