The moving-average-filter-based quasi-type-1 phase-locked loop (MAF-QT1 PLL) can provide zero steady-state phase error in the presence of frequency drifts, achieving a high filtering capability. However, an MAF and drift, MAF-QT1 PLL cannot achieve fast transient response frequency-dependent characteristic under adverse grid conditions. To overcome this drawback PLL, paper proposes frequency-adaptive improved (FAIMAF-QT1 PLL). Aiming at shortcoming slow dynamic MAF-QT-1 correction link is...

Tumor-associated macrophages (TAMs) in the immune microenvironment play an important role increased drug resistance and recurrence of malignant glioma, but mechanism remains incompletely inventoried. The focus this study was to investigate distinctions M2-like TAMs between primary recurrent glioma its influence recurrence.We employed single-cell RNA sequencing construct a atlas for total 23,010 individual cells from 6 patients with or identified 5 cell types, including cells....

In order to realize fast and efficient tuning of the proportional-integral-derivative (PID) controller parameters in thermal power plants, this paper thoroughly analyzes problems existing relay characteristic method based on phase angle margin auto-tuning (PM method), proposes an improved PM for most common first plus dead time (FOPDT) model practical engineering applications. The algorithm design target plant identification. Then, optimization is used calculate correction coefficient...

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In the context of real-time fault-tolerant scheduling in Distributed Control systems, Primary-backup scheme plays an important role. A backup copy is always preferred to be executed as passive backup-copy whenever possible because it can take advantages de-allocation technique and overloading improve schedulabilty. this paper, we propose a novel Fault-tolerant Rate-Monotonic Best-fit algorithm (NRMBF) based on systems enhance schedulability. Unlike existing algorithms (FTRMBF or FTRMFF) that...

The control system of a doubly-fed adjustable-speed pumped-storage hydropower plant needs phase-locked loops (PLLs) to obtain the phase angle grid voltage. main drawback comb-filter-based loop (CF-PLL) is slow dynamic response. This paper presents modified (MCF-PLL) by improving pole-zero pattern comb filter, and gives parameters’ setting method controller, based on discrete model MCF-PLL. In order improve disturbance resistibility MCF-PLL when power grid’s frequency changes, this proposes...

This paper, regarding a five-level nested neutral point piloted (NNPP) converter as the research object, analyzes working mechanism of an NNPP and determines switching commutation circuit principles. To solve problem common-mode voltage (CMV) in converters, control strategy based on fast model predictive (MPC) is proposed to effectively suppress voltage. The method this paper divided into two main parts. First, 19 zero (ZCMV) vectors are selected from 125 vectors, ZCMV optimized select best...

The phase-locked loop of grid-connected inverters affects their output impedance characteristics and stability. Based on the NPC, three-level LCL inverter, this article first analyzes frequency improved moving average filter (IMAF-PLL). Then, analyzing influence neutral point control inverter modeling, harmonic linearization modeling method combined with symmetrical component is used to establish a positive negative sequence model NPC inverter. Furthermore, IMAF-PLL are verified by...

The first task of parallel power system restoration is to develop an efficient partitioning strategy. This paper applies the virus propagation model that considers physical and topological properties systems propose a novel method. Firstly, different blackstart units are defined as various types viruses. infection rate buses can be calculated according importance each bus in system. An immune strategy then developed based on at which faulted devices damaged blackout. Considering key...

The local structure of the cylindrical shell produces plastic deformation under near-field underwater explosion load, based on fact that ring rib is strong support reinforced plate, this paper simplifies model into a rigid slatted beam at both ends, and lists equations beams action shock wave bubble pulsation load. This equation takes initial damage caused by account, compares calculation results obtained theoretical method with experimental data, which verifies correctness mechanical model....

Similarity laws of scaled models offshore platform deck structures under low velocity impact loading are proposed in the present research. The similarity with different scaling factors established forms dimensionless consideration flow stress differences materials. A displacement is defined by dividing plate thickness and a force thickness; then, force-displacement relationship established. Dynamic responses three geometrically similar stiffened 1:4, 1:2, 1:1 subjected to dropping rigid...

In isolated microgrid, most of the secondary control strategies (i. e. adjust output voltage and frequency DERs) are highly dependent on communication network which includes sensors communicators. But if there interruotion problem (CIP) among data transmission or communicators, it will affect effect. For these CIPs in process, a novel consensus-based strategy is designed to solve. this strategy, corresponding structure includings cyber layer physical layer. And specific designs are: 1. A...

This paper proposes extension of the path-generating regulator (PGR) to a tracking problem along straight pas- sage for car-like robots. The PGR is control method vehicle so as orient its heading toward tangent one curves belonging family path functions. Originally, it applies navigation that moves and stops at origin in direction horizontal axis Cartesian coordinate system. First, we extend passage. accomplished by modifying functions taking on center line Next, discuss convergent property...

Having studied the synchronized multi-axis control servo system, some type automatic wire striping and terminal crimping system is developed in paper. In order to realize precise efficient control, PVT (Position-Velocity-Time) algorithm adopted. This allows user specify time interval of each axis’ motion segment, so working sequence can be easily established a tight way which augments processing speed guarantees stability. Besides, by specifying position value at point, positioning accuracy...

To solve the power and energy distribution problem between demands of electric weapon motor driving for hybrid tracked vehicle, a control strategy was designed. This implemented by integrated unit every controller system weapon. The module scheme algorithm has been designed modeled in Matlab/Simulink, to accomplish simulation that contains driver input feedback state algorithm. Validity effectiveness this is approved results.

Inappropriate parameter tuning of under excitation limiter (UEL) will weaken system damping, and even lead to instability, which is attributed two reasons according the theoretical analysis. Firstly, UEL with inappropriate parameters provides a negative damping torque and, secondly frequency bond incoordinate that power stabilizer (PSS). Further, single-machine infinity bus based on PSS/E MATLAB established conclusion analysis verified. Result shows that, if lower action gets smaller slope...