With the development of social economy, more and appliances have been presented in a house. It comes out problem that how to manage control these increasing various efficiently conveniently so as achieve comfortable, security healthy space at home. In this paper, smart system base on technologies internet things has proposed solve above problem. The home uses central controller set up radio frequency 433 MHz wireless sensor actuator network (WSAN). A series modules, such switch developed...

In this brief, we investigate the parameter optimization issue of a central pattern generator (CPG) network governed forward and backward swimming for fully untethered, multijoint biomimetic robotic fish. Considering that CPG parameters are tightly linked to propulsive performance fish, propose method determination relatively optimized control parameters. Within framework evolutionary computation, use combination dynamic model particle swarm (PSO) algorithm seek characteristic an enhanced...

By employing the surface and bulk micro-electro-mechanical system (MEMS) techniques, we design demonstrate a simple miniature optical Fabry-Perot interferometric pressure sensor, where loaded is gauged by measuring spectrum shift of reflected signal. From simulation results based on multiple cavities interference model, find that response range sensitivity this sensor can be simply altered adjusting size sensing area. The experimental show high linear in 0.2-1.0 Mpa reasonable 10.07 nm/MPa...

A new, to the best of our knowledge, method for measurement absolute distance a remote target based on laser diode self-mixing interferometry is presented. double-modulation technique introduced improve resolution. Wavelength modulation beam obtained by modulating injection current diode. Phase an electro-optic crystal in external cavity. Absolute determined Fourier analysis method. Theoretical and numerical simulations are given. Experimental results show that resolution +/-0.3 mm can be...

This paper is devoted to the active turn control of a free-swimming multilink dolphin-like robot, with emphasis on yaw and pitch controls. With full consideration both mechanical configuration propulsive principle robot consisting joint multiple joints, viable approach perform maneuvers via laterally directed biases formed, providing an advantage in qualitative quantitative assessment. Meanwhile, based feedback angle measured by onboard gyroscope, closed-loop strategy dorsoventral motions...

In this paper, we demonstrated an improved laser self-mixing grating interferometer (SMGI) with auto-collimation design which can avoid the disturbance from light feedback of zero-order diffraction beam. order to obtain higher optical subdivision, SMGI multiple-diffraction is implemented. Both theoretical analysis and experimental work show that proposed system for displacement measurement achieve high sensitivity low uncertainty. Using system, different forms micro-displacement signals...

We fabricate and experimentally demonstrate a hybrid structured in-line Mach-Zehnder interferometer (MZI) for simultaneous measurement of refractive index (RI) temperature. The MZI is composed an embedded slender air cavity in micro fiber cascaded to piece photonic crystal (PCF). fabricated by fusion splicing fused tapering. interference spectra based on the PCF can be extracted through low-pass band-pass filters, respectively. RI temperature are interrogated coefficient matrix...

A frequency-based modeling approach has been developed for the vehicle fitted with Hydraulically Interconnected Suspension (HIS) system. This model fewer degrees of freedom (DOF) than reference time-based model. Several physical parameters HIS system are selected to analytically investigate their effects on several indicators roll, pitch and bounce modes, such as roll angular acceleration, vertical tire ground force. The also coordinately tuned optimized meet ride comfort requirement. full...

With large-scale integration of high penetration wind power, insufficient capacity problem frequency regulation is getting increasingly prominent. Energy storage, with quick response characteristics, can meet the stability and reliability requirements grid when acted as a auxiliary means. First, based on regional power traditional generations' necessity for battery energy storage system (BESS) to participate in primary (PFR) was analyzed. Second, BESS model applicable simulation built, then...

A novel sapphire fiber-optic high-temperature sensor has been designed and fabricated based on blackbody radiation theory. Metallic molybdenum used as the film material to develop cavity, owing its relatively high melting point compared that of sapphire. More importantly, fabrication process for cavity is simple, efficient, economical. Thermal emitted from such a transmitted via optical fiber remote place detection. The operating principle, structure, are described here in detail. developed...

All-fiber self-mixing interferometer (SMI) based on distributed-feedback (DFB) semiconductor lasers and phase modulating technique is introduced to measure the displacement of a vibrational target. Self-mixing interference occurs in DFB laser by reflecting light from mirror-like or rough target front laser, modulated fiber electrooptic modulator (EOM) external cavity. The sinusoidal demodulating used analyze signal. experimental results indicate that movement can be reconstructed this...

A fiber twist sensor based on the polarization-dependent loss (PDL) properties of core-only photo-induced birefringent long period grating (LPG) is first proposed. The PDL response to effect LPG studied theoretically and experimentally. results show that difference between maximum values two lobes in spectrum shows a high sensitivity sectionalized linearity angle. Moreover, this can measure angle determine direction simultaneously performance not affected by temperature variations. For...

A new approach for self-mixing interference in fiber ring laser with a parallel dual-channel is presented. The output power of the optical feedback theoretically deduced and simulated based on transcendental equation laser. variation modes competition between two channels also analyzed. We demonstrate this system to measure movement targets, discuss influence under different conditions. experimental results show good agreement simulation, indicate that an efficient multiple displacement measurement.

In this paper, the spectral characterization of polarization dependent loss (PDL) locally pressed fiber Bragg grating (FBG) is analyzed. The evolution PDL response a FBG as functions load magnitude loaded length and position are studied. physical model presented numerical simulation based on modified transfer matrix method also used to calculate FBG. theoretical analysis suggest that has potential applications for distributed diametric sensor. Good agreements between experimental results...

The transverse force measurement by virtue of 'stress-induced birefringence effects' a fiber Bragg grating (FBG) written in standard telecom single-mode is attractive the field internal strain sensing materials and structures. However, suffers from drawback low sensitivity FBG. In this paper, we propose utilizing centroid information polarization-dependent loss (PDL) evolution FBG for measurements. PDL with wavelength transmitted signals respect to was analyzed numerically simulated....

A means of obtaining independent multiplexing self-mixing interference (SMI) in fiber ring lasers (FRLs) for measurement or sensing is presented. demultiplex/multiplex arrayed waveguide grating (AWG) adopted multiplexing. The expression output powers without and with optical feedback FRL analyzed. gain competition the intensity alternation among different channels are discussed when introduced. experimental results show that SMI signal one channel has little influence on other channels....

Conventional generators(CG) are limited in their ability to provide load frequency control because of restriction on power ramp rate and response time while flywheel energy storage systems (FESS) well suited assist LFC owing fast accurate tracking ability. In this paper, fixed (PQ control) is applied the auxiliary service FESS probability statistics methods used for demand analysis. Taking into account regulation CG, initial cost, operation maintenance an optimal sizing model FESS-CG...

The Dual-motor multi-gear coupling powertrain (DMCP) has the potential to improve transmission system efficiency and driving comfort, but its complex structure multiple working modes present challenges. switching between different is easy cause longitudinal biggish vehicle jerk. To address these issues,this paper introduces Deep Deterministic Policy Gradient (DDPG) algorithm in design of an Energy Management Strategy (EMS) that minimises total drive power consumption. And number divided...

The effects of self-mixing interference on gain-coupled (GC) distributed-feedback (DFB) lasers are analyzed. From coupled-wave theory, the oscillation frequency and threshold gain variations theoretically deduced. influences from coupling length coefficient, linewidth enhancement factor GC DFB laser, reflection coefficient external reflector discussed along with numerical analysis compared lambda/4 phase-shifted Fabry-Perot (F-P) lasers. Our results show that high-accuracy sensors can be obtained

This paper presents a novel locomotion controller based on the Central Pattern Generator (CPG) model with nearest coupling for multilink robotic dolphin. Each CPG in is modeled two input saturation functions, nonlinear oscillating neuron, and an output amplification function. Its frequency amplitude are independently modulated. The can be amenable to rapid computation real-time control generate sufficient rhythmic patterns dolphin-like swimming. easily integrated into microcontroller without...

The space robot is concerned the most reasonable method for on-orbit servicing tasks. In applications, failure of manipulator critical both and spacecraft serviced. mode in this paper locked-joint which one common modes. To identify locked position joint, response mapping between joints motion base derived based on momentum conservation theorem. Then, velocity can be computed with a reckoned value position. By revising value, error velocities calculated measured decreased. Differential...