To improve the voltage and power sharing of distributed generations, hierarchical controls are widely used in microgrids while dependent communication network makes it difficult to ensure performance under limited bandwidth. In this paper, a predictive controller is designed. With delayed secondary PI compensation signals, an inner-loop robust control designed primary controller, ensuring stable tracking. Then, provide neighbor local predictions, such that data integrity improved by accurate...

Understanding the characteristics of Internet delay space (i.e., all-pairs set static round-trip propagation delays among edge networks in Internet) is important for design global-scale distributed systems. For instance, algorithms used overlay are often sensitive to violations triangle inequality and growth properties within space. Since designers systems rely on simulation emulation study alternatives, they need a realistic model space.Our analysis shows that existing models do not...

Abstract Group IVB transition metal dichalcogenides (TMDs) have attracted significant interests in photoelectronics due to their predictable superior physical properties compared group VIB (Mo and W) TMDs. However, the nonlinear optical ultrafast photonic devices based on TMDs remained unexplored so far. Herein, absorption of HfS 2 nanosheets (NSs) prepared by liquid exfoliation is demonstrated. The usage as a new device for high‐energy ultrashort pulse generation fiber laser reported first...

Voltage regulation is imperative for the successful operation of electricity distribution networks, especially with a high penetration level photovoltaic (PV) systems. Power compensation control (PCC) that uses both reactive power and active curtailment has shown promising results in alleviating voltage rise problems. It crucially relies on real-time communications among distributed PV However, transmission state measurements signals PCC hampered by inevitable communication delays....

Path planning for wheeled mobile robots on partially known uneven terrain is an open challenge since robot motions can be strongly influenced by with incomplete environmental information such as locally detected obstacles and impassable areas. This paper proposes a hierarchical path approach to move in terrain. We first model the environment respecting features, including slope, step, unevenness. Second, facilitated model, we use A⋆ algorithm plan global based map. Finally, Q-learning method...

This paper presents the performance comparison among three different topologies of permanent magnet synchronous machine, namely a transverse flux machine with concentration and claw pole structure, an axial segmented armature torus structure conventional radial embedded magnets in rotor. With help Finite Element Method, electrical machines have been designed considering required dimensions mass. The complete results evaluation comparisons are described this paper. From obtained it can be...

Frequency deviation and powers sharing error exist in a microgrid with multiple droop-controlled distributed generations. To solve the above problems, we propose an event-triggered multistage secondary control. First, to improve synchronization accuracy, divide control into stages based on frequency/voltage droop characteristics. The inputs of proportion-integration compensator for these are different. corresponding stage will be activated when value meets certain "event" (given ranges)....

This paper investigates the collaborative tracking control for dual linear switched reluctance machines (LSRMs) over a communication network with random time delays. Considering spatio-temporal constraint relationship of LSRMs in complex industrial processes, scheme is proposed based on networked motion method. The stability conditions and controller design method are obtained from two motors relative position error by using Lyapunov theory delay systems approach. Four different allocation...

This paper investigates the task assignment problem for one truck and drone to deliver packages a group of customer locations. The truck, carrying large number packages, can only travel between prescribed street-stopping/parking locations replenish with both batteries. carry multiple simultaneously serve customers sequentially within its limited operation range. objective is reduce amount time it takes necessary package last while taking into account range loading capacity. First, delivery...

The coordinated tracking control for the group motion system based on three direct-drive double-sided linear switched reluctance motors (LSRMs) is investigated in this paper. construction proposed elaborated, including unit and design, communication configuration among systems, stability performance analysis of system. concentrated identical LSRMs with different topologies. Experimental results demonstrate that necessary bidirectional interactions between systems contribute to coordination...

Industrial control systems may be affected by vulnerabilities, leading to a series of security issues. However, existing vulnerability remediation methods mainly include static patching and dynamic patching, but due the hardware resource constraints complex application environments faced embedded devices, these traditional all suffer from limitations high risk service interruption overhead, which make it difficult satisfy special needs devices in terms continuity assurance. For this reason,...

Abstract This paper presents a novel approach to secure communication systems leveraging the chaotic behavior of incommensurate fractional-order systems. The primary challenge addressed is design and cost-efficient framework that ensures robust performance under uncertainties disturbances. Unlike conventional methods rely on single long-range transmitters, we propose distributed system with multiple short-range transmitters. innovation significantly enhances reliability by reducing risk...

This paper investigates a novel reinforcement learning (RL)-based quadratic programming (QP) method for the safety-critical trajectory tracking control of autonomous underwater vehicles (AUVs). The proposed approach addresses substantial challenge posed by model uncertainty, which may hinder safety and performance AUVs operating in complex environments. RL framework can learn inherent uncertainties that affect constraints Control Barrier Functions (CBFs) Lyapunov (CLFs). These learned are...

Abstract The use of shore power by docked ships is an important energy substitute for environmental protection measures, and efficient stable system the cornerstone achieving green transformation in ports. This study delves into various electrical faults encountered systems practical applications, including short circuits, overloads, high low voltages, quality issues. Targeted fault diagnosis techniques improvement strategies are proposed. effectiveness measures proposed this paper has been...

In CNC machines, the temperature field analysis of spindle servo permanent magnet motors (SSPMMs) under rated load, overload, and weak magnetic conditions is critical for ensuring stable operation machining accuracy. This paper proposes a calculation method SSPMMs based on thermal network method, which used to quickly evaluate performance different operating during design. can calculate steady-state or transient rise conditions. First, electromagnetic heat sources were analyzed. Then,...

Understanding the characteristics of Internet delay space (i.e., all-pairs set static round-trip propagation delays among edge networks in Internet) is important for design global-scale distributed systems. For instance, algorithms used overlay are often sensitive to violations triangle inequality and growth properties within space. Since designers systems rely on simulation emulation study alternatives, they need a realistic model In this paper, we analyze measured spaces thousands quantify...