Color brightness modulation of responsive photonic liquid for multicolored electrochromic displays

2022 ◽  
Author(s):  
Shaoxin Song ◽  
Yang Liu ◽  
Xuejuan Liu ◽  
Jianping Ge ◽  
Dengteng Ge ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Energy Saving ◽  
Fast Response ◽  
Fine Control ◽  
Brightness Modulation

Electrically responsive photonic crystals have drawn extensive interest in the growing demands in camouflages, displays, sensing, energy-saving building etc. due to their fine control, fast response and convenient implementation. Veiled...

Energy-saving design of variable-displacement bi-directional pump-controlled electrohydraulic system

2020 ◽  
pp. 095965182097389
Author(s):  
Samir Kumar Hati ◽  
Nimai Pada Mandal ◽  
Dipankar Sanyal
Keyword(s):  
Energy Saving ◽  
Absolute Error ◽  
Fast Response ◽  
Maximum Energy ◽  
Radial Clearance ◽  
Simulation Based Design ◽  
Simulation Based ◽  
Displacement Pump ◽  
Variable Displacement ◽  
Axial Piston

Losses in control valves drag down the average overall efficiency of electrohydraulic systems to only about 22% from nearly 75% for standard pump-motor sets. For achieving higher energy efficiency in slower systems, direct pump control replacing fast-response valve control is being put in place through variable-speed motors. Despite the promise of a quicker response, displacement control of pumps has seen slower progress for exhibiting undesired oscillation with respect to the demand in some situations. Hence, a mechatronic simulation-based design is taken up here for a variable-displacement pump–controlled system directly feeding a double-acting single-rod cylinder. The most significant innovation centers on designing an axial-piston pump with an electrohydraulic compensator for bi-directional swashing. An accumulator is conceived to handle the flow difference in the two sides across the load piston. A solenoid-driven sequence valve with P control is proposed for charging the accumulator along with setting its initial gas pressure by a feedforward design. Simple proportional–integral–derivative control of the compensator valve is considered in this exploratory study. Appropriate setting of the gains and critical sizing of the compensator has been obtained through a detailed parametric study aiming low integral absolute error. A notable finding of the simulation is the achievement of the concurrent minimum integral absolute error of 3.8 mm s and the maximum energy saving of 516 kJ with respect to a fixed-displacement pump. This is predicted for the combination of the circumferential port width of 2 mm for the compensator valve and the radial clearance of 40 µm between each compensator cylinder and the paired piston.

Hydrophobic Poly( tert ‐butyl acrylate) Photonic Crystals towards Robust Energy‐Saving Performance

2019 ◽  
Vol 131 (38) ◽  
pp. 13690-13698 ◽  
Author(s):  
Xingjiang Wu ◽  
Ri Hong ◽  
Jinku Meng ◽  
Rui Cheng ◽  
Zhijie Zhu ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Energy Saving ◽  
Butyl Acrylate ◽  
Tert Butyl

Hydrophobic Poly( tert ‐butyl acrylate) Photonic Crystals towards Robust Energy‐Saving Performance

2019 ◽  
Vol 58 (38) ◽  
pp. 13556-13564 ◽  
Author(s):  
Xingjiang Wu ◽  
Ri Hong ◽  
Jinku Meng ◽  
Rui Cheng ◽  
Zhijie Zhu ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Energy Saving ◽  
Butyl Acrylate ◽  
Tert Butyl

Research on Fuzzy-PID Control for Contra Rotating PMBLDCM

2012 ◽  
Vol 505 ◽  
pp. 227-232
Author(s):  
Yan Sheng Li ◽  
Man Feng Dou ◽  
Jin Li Lei
Keyword(s):  
Pid Control ◽  
Closed Loop ◽  
Fast Response ◽  
Torque Ripple ◽  
Fuzzy Pid ◽  
Control Effect ◽  
Fuzzy Pid Control ◽  
Fuzzy Pid Controller ◽  
Fine Control ◽  
On Line

The system of contra rotating PMBLDCM widely used in underwater vehicle is a non-linear, multi-variable, time-varying system. Using the traditional method for PID control is difficult to achieve fine control effect. By designing a Fuzzy-PID controller, fuzzy algorithm for on-line auto-tuning PID parameters is applied to the system of a speed closed-loop in PMBLDCM double closed-loop system. An example of how to design and simulate the system by using the software MATLAB is introduced. The simulation results show that the method of Fuzzy-PID control has better control performance comparing with the conventional PID control, it has characteristics of no overshoot, fast response, small torque ripple.

Realization of energy-saving glass using photonic crystals

2018 ◽  
Vol 12 (1) ◽  
pp. 178-184
Author(s):  
Yen-Hsiang Chen ◽  
Li-Hung Liao ◽  
Yu-Bin Chen
Keyword(s):  
Photonic Crystals ◽  
Energy Saving

scholarly journals Microfluidic Construction of Hierarchically Composite Superballs for Sensing Applications

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 750
Author(s):  
Juan Wang ◽  
Lingling Shui ◽  
Loes I. Segerink ◽  
Jan C. T. Eijkel
Keyword(s):  
Photonic Crystals ◽  
Color Change ◽  
Surrounding Medium ◽  
Fast Response ◽  
Fluid Composition ◽  
Precise Control ◽  
Sensing Applications ◽  
Colloidal Photonic Crystals ◽  
Scientific World ◽  
Potential Applications

Colloidal photonic crystals have attracted much attention of the scientific world due to their unique optical properties and potential applications in sensing, displays, optoelectronics, controlled superwetting and other fields. Here we report the fabrication of spherical colloidal photonic crystals featured with well-ordered nanopatterns from silica nanoparticles (SiO2NPs) and gold nanoparticles (AuNPs) through a droplet-based microfluidic approach. The colloidal crystals show both the photonic band gaps (PBG) and surface plasmonic resonance (SPR) properties. These proposed hierarchically composite ‘superballs’ will have an excellent performance in sensing applications, due to the fast response (the scattering color change) to the dielectric properties of the surrounding medium. A robust and efficient strategy is proposed and demonstrated to fabricate the composite superballs with multifunctional properties, broadening the perspective of their applications by the advantages of precise control over the size of the particles and flexible change of the fluid composition.

scholarly journals Ultrafast Growth of h-MoO3 Microrods and Its Acetone Sensing Performance

Surfaces ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 9-16
Author(s):  
Giovana T. Santos ◽  
Anderson A. Felix ◽  
Marcelo O. Orlandi
Keyword(s):  
Molybdenum Trioxide ◽  
Metastable Phase ◽  
Fast Response ◽  
X Ray Diffraction ◽  
X Ray ◽  
Response Recovery ◽  
Lower Detection ◽  
Recovery Times ◽  
Fine Control ◽  
Ppm Level

Hexagonal molybdenum trioxide (h-MoO3) was synthesized by microwave-assisted hydrothermal method, allowing an ultrafast growth of unidimensional microrods with well-faceted morphology. The crystalline structure of this metastable phase was confirmed by X-ray diffraction (XRD) and Raman spectroscopy. Scanning electron microscopy (SEM) showed that hexagonal microrods can be obtained in one minute with well-defined exposed facets and the fine control of morphology. Sensing tests of the acetone biomarker revealed that the h-MoO3 microrods exhibit, at low ppm level, good sensor signal, fast response/recovery times, selectivity to different interferent gases, and a lower detection limit of 400 ppb.

Hydrophobic fluorinated colloidal photonic crystals for heterogeneous aggregated cluster encoding and energy-saving applications

2021 ◽  
Vol 411 ◽  
pp. 128623
Author(s):  
Tong-Bo Chen ◽  
Qiu-Ning Li ◽  
Chang Liu ◽  
Ri Hong ◽  
Qing Li ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Energy Saving ◽  
Colloidal Photonic Crystals

Nanostructure of semiconductor quantum dots in a borosilicate glass matrix by complementary use of HREM and AEM

1990 ◽  
Vol 48 (4) ◽  
pp. 728-729
Author(s):  
M.J. Kim ◽  
L.C. Liu ◽  
S.H. Risbud ◽  
R.W. Carpenter
Keyword(s):  
Quantum Dots ◽  
Borosilicate Glass ◽  
Glass Matrix ◽  
Optical Switching ◽  
Response Times ◽  
Fast Response ◽  
Processing Technique ◽  
Internal Stresses ◽  
Electron Hole ◽  
Spatial Dimensions

When the size of a semiconductor is reduced by an appropriate materials processing technique to a dimension less than about twice the radius of an exciton in the bulk crystal, the band like structure of the semiconductor gives way to discrete molecular orbital electronic states. Clusters of semiconductors in a size regime lower than 2R {where R is the exciton Bohr radius; e.g. 3 nm for CdS and 7.3 nm for CdTe) are called Quantum Dots (QD) because they confine optically excited electron- hole pairs (excitons) in all three spatial dimensions. Structures based on QD are of great interest because of fast response times and non-linearity in optical switching applications.In this paper we report the first HREM analysis of the size and structure of CdTe and CdS QD formed by precipitation from a modified borosilicate glass matrix. The glass melts were quenched by pouring on brass plates, and then annealed to relieve internal stresses. QD precipitate particles were formed during subsequent "striking" heat treatments above the glass crystallization temperature, which was determined by differential thermal analysis.

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