This paper analyzes for the first time a two-loop sliding-mode control (SMC) of high-order converter supplying constant power load (CPL). The is single-switch quadratic buck structure (QBC) interfacing domestic 380 V DC bus to CPL requiring regulated voltage 48 DC. unstable in absence and even after insertion an inner loop based on SMC input inductor current. addition appropriate linear outer e...

A doubly fed induction generator (DFIG) designed to be driven at variable speed from a wind turbine and supplying an isolated load is presented. Two back-to-back PWM voltage-fed inverters connected between the stator and the rotor allow suband super-synchronous operation with low distortion currents. The load voltage is maintained at constant frequency and its magnitude is regulated through con...

The shear behavior and dynamic response of a steel–silt interface are significant for the safety stability offshore structures in Yellow River Delta. A series cyclic tests under constant normal load conditions (CNL) were carried out to explore effects stress, amplitude, roughness, water content on strength, stiffness, damping ratio using large apparatus. preliminary results showed that amplitud...

the resistant* of patesa against lateral displacement (le. the stability), was studied tinder a range of conditions in vitro, at a range of knee flexion angles. muscle forces were applied in physiological directions along the separate quadriceps muscles. normal muscle actions with constant tension showed constant patellar stability up to sixty degrees knee flexion, and then a significant increa...

Funicular structures can resist a given load with pure axial forces and therefore tend to use material very efficiently. One main challenge in their design is form finding, which often requires advanced numerical methods. In this article, we show analytically that common family of curves, conics, funicular for particular case: uniform radial emanating from focus. The result generalization the w...