A wide variety of phenomena are described by partial differential equations, so-called distributed parameter systems. In such partial differential equation models it is often desirable to determine the effect of uncertainties in parameters appearing in the equations on their solutions and also, if more than one .parameter may vary, which parameters arc most influential. The sensitivity analysis...

The development of electromechanical actuators (EMAs) is the key technology to build an all-electric aircraft. One of the greatest hurdles to replacing all hydraulic actuators on an aircraft with EMAs is the acquisition, transport and rejection of waste heat generated within the EMAs. The absence of hydraulic fluids removes an attractive and effective means of acquiring and transporting the hea...

Analysis and design techniques for designing a lumped-element 3-dB quadrature coupler with wide-band flat coupling are proposed for microwave integrated-circuit/monolithic-microwave integrated-circuit applications. The proposed design technique can produce a coupler with flat coupling over 50% fractional bandwidth, which is wider than the conventional lumped-element design methods. A prototype ...

Among the intermolecular interactions, the Casimir and van der Waals forces are the most important forces that highly affect the behavior of nanostructures. This paper studies the effect of such forces on the adhesion of cantilever freestanding nanostructures. The nanostructures are made of a freestanding nano-beam which is suspended between two upper and lower conductive surfaces. The linear s...

While frequency response analysis (FRA) is a well matured technique widely used by current industry practice to detect the mechanical integrity of power transformers, interpretation FRA signatures still challenging, regardless research efforts in this area. This paper presents method for reliable quantitative and qualitative transformer based on decision tree classification model fully connecte...

Synthesis of an adaptive parameter identifier is developed for linear dynamic systems with finitely many lumped delays in the state vector and control input. The state of the system is assumed to be available for measurements. Once the parameter identifiability is guaranteed the simultaneous on-line identification of the system parameters and delays is achieved by the adaptive identifier propos...

The analytical modeling and simulation of conservative electrostatic, electromagnetic and electrodynamic transducers found in microsystems using a non-linear lumped-parameter approach is presented in this paper. A comparison is made between this approach and the linearized equivalent circuit method. All models of transducers are written in HDL-A, a proprietary analogue hardware description lang...

We present a new algorithm, sie, for designing lumped parameter models from rst principles. Like the ibis system of Williams [1989, 1990], sie uses a qualitative representation of parameter interactions to guide its search and speed the test for working designs. But sie's interaction set representation is considerably simpler than ibis's space of potential and existing interactions. Furthermore...