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On the benefit of the deeply development of MEMS and inertial instrument technology, the novel micro technology for positioning, navigation and timing (μΡΝΤ) becomes the substitution of GPS technology, and is the one of the most popular research area. The μ PNT unit volume can be pressed obviously by employing 3D stack technology after MEMS components are finished, and through silicon vias (TSV) technology...
In view of the disadvantages of tradition seat suspension comfort and large energy consumption of the semi-active seat, an energy-harvest magnetorheological semi-active seat suspension based on piezoelectric structure is proposed. The three degree of freedom vehicle seat suspension model and the piezoelectric cantilever beam energy-harvest simulink model are established, and the force characteristic...
Because most systems are nonlinear in practical applications, output tracking for nonlinear system is of great interest to engineers and scientists. As a specific class of nonlinear system, fractional power system arises in many problems, yet little progress is made on this topic. Inspired by Zhang et al., this paper presents a simple but powerful method of controller design, i.e., generating the...
In today's energy shortage and environmental pollution, governments are actively developing new and renewable clean energy, wind energy as an outstanding representative of clean energy has been rapid development in recent years. However, with the increasing proportion of wind power, the problem of abandoned wind is becoming more and more serious in our country, especially in the northern region during...
Resonant wireless power transmission has the advantages of long transmission distance and high efficiency. Series — series (SS) transmitting and receiving system is suitable for small load research. In this paper SS-type circuit is analyzed and discussed by using equivalent circuit theory. The mathematical models of the transmission efficiency and output power are derived. The influencing factors,...
A single-event-transient-hardened-by-design (SET-HBD) charge pump (CP) is proposed to improve the reliability of the phase-locked loop (PLL) in SMIC 0.18μm CMOS process. And, the SET-HBD PLL is designed by adopting the proposed SET-HBD CP instead of the traditional CP. Simulation results show that the designed SET-HBD PLL, which is compared with the general PLL (GPLL), has better performances including...
A high-order temperature-compensated bandgap voltage reference (BGR) is proposed in SMIC 0.18μm CMOS process in this paper. By adding piecewise temperature compensation circuit and ΔVGS compensation circuit to the conventional BGR, the temperature performance of the proposed BGR is effectively improved. Simulation results show that the temperature coefficient of the proposed BGR is 0.6457ppm/°C when...
In order to solve the singularity problem of the Jacobian matrix in the robotic inverse kinematics method, a new singular processing algorithm is proposed. Based on the damped least-square (DLS) method, the damping coefficients, by using the singular value decomposition (SVD) of the Jacobian matrix, are optimized from the fixed value of the traditional algorithm to the dynamic value adjusted with...
The poor performance of MHD ARS at low frequency has depressed its accuracy and application range. A preliminary study on the magnetohydrodynamic (MHD) angular rate sensor combing Coriolis effect (C-MHD ARS) is made to achieve the low-frequency bandwidth expansion. Physical model of C-MHD ARS is given, and then the physical design with an MHD pump is described. The numerical simulation and experiment...
Industrial mechanical arm is widely used in aircraft manufacturing such as aircraft skin drilling and riveting. However, due to the open-loop controlling of the mechanical arm, the positioning precision cannot meet the high accuracy requirement in aircraft manufacturing. Therefore, this paper proposes a novel automatic tracking approach by using monocular vision technology. Due to the uncertain attitude...
In this paper, the thermal performance of AC-LED (Alternative Current Light Emitting Diode) light engines driven by two types of alternative current input voltage were analyzed, based on the results of transient temperature rise measurements using infrared camera module. The one was driven by 110V alternative current, and the another one was 220V alternative current. A novel infrared image measurement...
YARN provides support for a variety of computing frameworks and different types of jobs, different types of computing tasks and jobs can be run on the YARN platform, different job types can divided into batch jobs and interactive jobs. As for the single job, it can be divided into three kinds: the small job, the middle job and the big job. Based on the different combinations and quantities of these...
With the establishment of the Emission Control Areas(ECA) of China, and the huge demand of the One Belt One Road (OBOR) strategy of intermodal transport, container intermodal transport will be rapid development in the future. Meanwhile, the air pollution problem is increasingly serious, optimizing the container intermodal transport in port, reducing emissions, and improving operation efficiency, which,...
In view of the support vector machine (SVM) model applied in vibrant fault diagnosis for hydro-turbine generating unit, it exists problems of parameter settings and classification-plane incline due to unequal sample, which leads to lower diagnosis accuracy. As a new bionic intelligent optimization algorithm for glowworm swarm optimization(GSO), it has the characteristics of strong versatility and...
To remedy the problem of joint-variable oscillation and instability as well as the non-zero final joint-velocity phenomenon arising in the conventional inertia-inverse weighted torque (IIWT) minimization scheme, in this paper, a novel scheme is proposed and investigated for redundant manipulators with joint-physical limits (i.e., limits of joint angle, joint velocity, joint acceleration and joint...
For the field of weak magnetic anomaly measurement, a high precision three axis fluxgate magnetometer MAG-XYZ is designed, which has a wide dynamic measurement range (0∼ + 100000nT), high measurement accuracy (24-bit analog-to-digital converter) and 2K Hz sampling rate. The basic working principle of FGM3D / 100 sensor is described, and the composition of the three axis fluxgate magnetometer is introduced...
In the machining process, the rationalization of the cutting amount is an important way to effectively improve the productivity, reduce the cost and improve the quality of the workpiece. The rapid development of genetic algorithm has made remarkable achievements in solving the problem of nonlinear optimization. However, in the process of machining, there are many factors that affect the amount of...
Most of the Spectrum Induced Polarization (SIP) instruments use the way of wired cable to collect synchronously at present, and the observation efficiency is very low in this way. Meanwhile, some of the wireless SIP instruments usually lead to low precision due to clock synchronization problems. Hence, through the improvement of the Real Time Clock (RTC) timing, the use of high-precision synchronous...
At present, because the accuracy of the model and its parameters of Under Excitation Limiter (UEL) for generators in power system stability simulation in China is insufficient, power factor depth of the generators during the simulation evidently is different from the capability of generators, the check of steady voltage rise will be optimistic and the pre-control strategies based on these results...
Large scale incorporation of wind farms may cause the issue of low inertia and lack of ability of frequency regulation in power systems. In this paper, the frequency control scheme of variable speed wind turbine under the whole wind condition was proposed. According to the reserve capacity required for the frequency regulation of the variable speed wind turbine, the de-loading scheme of the wind turbine...
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