The dual-dc-port dc–ac converter-connected photovoltaic (PV)–battery hybrid systems present high-efficiency and low-cost features with single-stage power conversion as the PV unit battery are connected to grid directly. However, it is challenging achieve flexible distribution in this configuration due its coupled grid-side current tracking distribution. To deal issue, article proposes a zero-vector-regulation-based closed-loop strategy for PV–battery systems. By modeling converter an...

Implementation of hybrid energy system (HES) is generally considered as a promising way to satisfy the electrification requirements for remote areas. In present study, novel decision making methodology proposed identify best compromise configuration HES from set feasible combinations obtained HOMER. For this purpose, multi-objective function, which comprises four crucial and representative indices, formulated by applying weighted sum method. The entropy weight method employed quantitative...

In this paper, a shape optimization method of truncated conical point absorber wave energy converter is proposed. This converts the absorption efficiency into matching problem between spectrum South China Sea and buoy’s power spectrum. An objective function which combines these two spectra established to reflect absorbing efficiency. By applying Taguchi design, frequency domain hydrodynamic analysis response surface (RSM), radius, cone angle draft buoy are optimized. Since significant...

Multisource inverter (MSI) provides a low-cost and high-power-density solution for microgrids (MGs) applications due to the removal of dc/dc converter, which offers direct power flow between dc-side ac-side. The existing modulation strategies MSI transplanted from those multilevel inverters experience limited distribution range finite control freedom degree provided by redundant vectors. Moreover, dc ports is highly coupled with vector synthesis, this especially true when voltages port are...

Microgrid is an effective way to utilize renewable energy resources, especially for satisfying the electricity requirements in remote islands. The operation optimization of island microgrid critical ensure performance whole system, and it usually a multiconstrained multiobjective problem. main contribution this study method stand-alone system island, which includes wind, PV, battery, diesel generator. In paper, novel model proposed, battery considered separately; day-ahead considering...

To address the problems caused by direct interconnection of distributed generation with power system, concept microgrid is proposed. ensure operation microgrid, reasonable planning required. This paper introduces research modeling and algorithm, pave a way for further studies on related fields.

Pacific oysters, Crassostrea gigas , are the most abundantly harvested shellfish in world and ecologically significant. The content of nutrients, including protein, glycogen, lipid, zinc (Zn), selenium (Se), is important for oyster meat quality, but heritability estimates such traits have rarely been reported. In this study, 64 full‐sib families were generated using a nested mating design. Finally, 18 families, which there nine half‐sib with each containing 2 sampled estimates. narrow‐sense...

In this paper, the study and optimization design of stator coreless axial flux permanent magnet synchronous generators is presented for direct driven variable speed renewable energy generation system applications while considering requirement reliability dynamic performance with unstable input conditions. The analytical model developed based on investigation generator (AFPMSG) structure basic electromagnetic equations to find out relationship between parameters performance. Simulation via...

With the aid of multi-agent based modeling approach to complex systems, hierarchy simulation models carrier-based aircraft catapult launch are developed. Ocean, carrier, aircraft, and atmosphere treated as aggregation agents, detailed components like catapult, landing gears, disturbances considered meta-agents, which belong their agent. Thus, model with two layers is formed i.e. agent layer meta-agent layer. The information communication among all agents described. meta-agents within one...

Toward a multi-objective optimization robust problem, the variations in design variables and environment pa-rameters include small large varia-tions. The former have effect on performance func-tions and/or constraints, latter refer to ones that functions constraints. robustness of is discussed this paper. A post-optimality sensitivity analysis technique for problems two indices are introduced. first one considers de-sign parameters. second index characterizes It based ability solution...

This paper presents a planar motion stage design based on flexure element that allow large ranges of along x and y direction without causing over-constraint or significant error motions. From comparing the conventional XY with flexure-based compliant stage, main bottleneck for is parasitic because inherent characteristics element. Based constraint analysis, new mechanism designed to eliminate error, piezoelectric actuator used improve positioning resolution.

The flight safety is threatened by the special conditions and low speed of carrier-based aircraft ski-jump takeoff. carrier motion, dynamics, landing gears wind field sea state are comprehensively considered to dispose this multidiscipline intersection problem. According particular naval operating environment takeoff, integrated dynamic simulation models multi-body system developed, which involves movement entities carrier, gears, takeoff instruction, control deck disturbance. Based on...

In this paper, an adaptive tracking control algorithm and its step by implementation procedure are developed for a class of nonlinear plants within U-model framework with unknown parameters. A new technique is proposed to design online using the Radial Basis Functions Neural Network (RBFNN).

Most of the research on driving stability control distributed drive electric vehicles is based a yaw motion design controller. The designed controller can improve lateral vehicle well but rarely mentions its changes to roll and pitch body, uneven distribution force will also cause instability in speed, resulting wheel transition slip, sideslip, loss. In order spatial distributed-driven resolve caused by their coupling, decoupled strategy yaw, roll, multi-objective constraints was proposed....

The contact between vehicle tire and pavement surface random field is typically modeled as a point in the literature of vehicle-pavement interaction. In reality, tire-pavement interface can be considerably larger than contact, particularly when not very stiff pavements are relatively soft. This paper developed methodological framework that approximately aggregates one- two-dimensional fields within area by taking local, weighted spatial average to account for distributed contact. Statistical...

In this study, the development of a novel hydraulic robotic actuator is introduced. With use additive manufacturing (AM), lightweight and compact design can be achieved. A high load-to-weight ratio 3-DOF robot with orthogonally connected rotary cylinders designed for AM. To validate feasibility, titanium prototyped by using metal powder bed fusion (M-PBF) AM process. set loading experiments are conducted on AM-printed prototype. The study shows that system-level methods help gain increased...

The dual stage manipulator is composed of the voice coil motor (VCM) and piezoelectric ceramics transducer (PZT), which can produce high precise displacement express a well dynamic performance. However, inaccurate modeling exacerbates positioning accuracy. This paper presents an approach to model system using bond graph theory, then derives state space equations through straightforwardly, be used in compute simulations.