This paper studies the feedback structure associated with piezoelectric shunt damping systems and introduces a new impedance structure for multi-mode piezoelectric shunt damping. The impedance is shown to be realizable using passive circuit components and digital implementation of the associated admittance transfer function is discussed. (Some figures in this article are in colour only in the e...

Abstract Some true bug species use droplet-shaped, open-capillary structures for passive, unidirectional fluid transport on their body surface in order to spread a defensive protect themselves against enemies. In this paper we investigated if the shape of found bugs (bug-structure) could be optimised with regard better performance transportation. Furthermore, kind structure technical applicatio...

Microstrip technology is widely applied for design and implementation of several communication devices such as filters, diplexers, triplexers, multiplexers, couplers, etc. They are utilized to isolate desired signals remove disturbing signals. The layout diplexers triplexers have two, three four ports, respectively. Passive filters at least one pass channel, whereas two channels transmit the si...

1 Abstract— A wide family of parallel manipulators (PMs) is the one that groups all the PMs with three legs where the legs become kinematic chains constituted of a passive spherical pair (S) in series with either a passive prismatic pair (P) or a passive revolute pair (R) when the actuators are locked. The topologies of the structures generated by these manipulators, when the actuators are lock...

Trapped modes in the linearised water-wave problem are free oscillations of an unbounded fluid with a free surface that have finite energy. It is known that such modes may be supported by particular fixed structures, and also by certain freely-floating structures in which case there is, in general, a coupled motion of the fluid and structure; these two types of mode are referred to respectively...

In this article, the H∞ optimization design of a hybrid vibration absorber (HVA), including both passive and active elements, for the minimization of the resonant vibration amplitude of a single degree-of-freedom (SDOF) vibrating structure is derived by using the fixed-points theory. The optimum tuning parameters are the feedback gain, the tuning frequency, damping and mass ratios of the absorb...

english passive has always been regarded as a challenge by farsi-speaking efl learners. despite the presence of many linguistic and pedagogical approaches in studying and teaching english passive, there still appears to be a pedagogical gap facing farsi-speaking efl learners dealing with this construction. taking up the cognitive-construction grammar perspective, the present article aims to inv...