Segmented Active Constrained Layer Damping(SACLD)is an intelligent vibration-damping structure,which could be applied to the sectors of aviation,aerospace,and transportation engineering to reduce the vibration of flex...
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Segmented Active Constrained Layer Damping(SACLD)is an intelligent vibration-damping structure,which could be applied to the sectors of aviation,aerospace,and transportation engineering to reduce the vibration of flexible ***,machine learning technology is widely used in the engineering field because of its efficient multi-objective *** dynamic simulation of a rotational segmental flexible manipulator system is presented,in which enhanced active constrained layer damping is carried out,and the neural network model of Genetic Algorithm-Back Propagation(GA-BP)algorithm is *** suppression and structural optimization of the SACLD manipulator model are studied based on vibration mode and damping *** modal responses of the SACLD manipulator model at rest and rotation are *** addition,the four model indices are optimized using the GA-BP neural network:axial incision size,axial incision position,circumferential incision size,and circumferential incision ***,the best model for vibration suppression is obtained.
Load forecasting is an important part of power system, which is conducive to the smooth and efficient operation of power grid. This paper uses an ensemble learning method, eXtreme Gradient Boosting(XGBoost), and combi...
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Aiming at the problem of flexible vibration of the rigid-flexible coupled model in the process of motion, the dynamic modeling and analysis of the rigid-flexible model considering the influence of electromechanical co...
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This paper studies a virtual force modeling approach based on an improved mass-spring-damper systems, aiming to establish a force feedback model that accurately simulates and predicts interactions between objects in a...
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The pre-decomposition link of cement raw meal is an important link in the cement production process. The raw meal is first preheated by the preheater, and then enters the decomposition furnace for endothermic decompos...
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In 2018-2019,two types of rocket-triggered lightning tests,that is,striking to ground and distribution line,were conducted in Guangdong,*** main focus of this paper is to compare the waveform parameters of the return ...
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In 2018-2019,two types of rocket-triggered lightning tests,that is,striking to ground and distribution line,were conducted in Guangdong,*** main focus of this paper is to compare the waveform parameters of the return strokes(RS)from the two *** current,the 10%-90%risetime of RS from lightning striking to distribution line is 2.4 times higher than that striking to ground,and the differences in the other parameters are *** close magnetic field,the RS from lightning striking to distribution line have a lower peak(30%lower after considering the peak current)and a larger risetime and half-peak width time;besides,it is necessary to divide the front edge of the close magnetic field waveform into two parts:leader(BL)and return stroke(BRS).For close electric field,the close RS electric field peak(ERS)was less sensitive to distance than the leader electric field peak(EL).For far electric field,the differences in waveform parameters of RS from the two tests were not significant,but after considering the peak current,the normalised initial electric field peak(EP)of RS from lightning striking to distribution line was 14%lower than that striking to ground.
This paper designs an incentive Stackelberg strategy for the discrete-time stochastic systems with mean-field *** conditions for the existence of such a design are ***,the incentive strategy is obtained as a feedback ...
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This paper designs an incentive Stackelberg strategy for the discrete-time stochastic systems with mean-field *** conditions for the existence of such a design are ***,the incentive strategy is obtained as a feedback form including the deviation of the state and its mathematical ***,the stability analysis is *** is found that the stability can be guaranteed by the *** addition,the specific algorithm is proposed and its effectiveness is checked by two examples.
This paper presents a solution to the circulating current fault of aircraft power *** DC-link type Variable Frequency to Constant Frequency(VFCF)converter system is the preferred scheme to feed the constant 400 Hz loa...
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This paper presents a solution to the circulating current fault of aircraft power *** DC-link type Variable Frequency to Constant Frequency(VFCF)converter system is the preferred scheme to feed the constant 400 Hz load in an aircraft with a variable frequency power *** to the requirement of aircraft standards,both grounds of the rectification and inversion stage are tied to the metal frame of the *** such a tied ground,the DC bus voltage rises greatly,and a large circulating current appears in the casing as the ground,which leads to equipment failure and potential safety *** to the existing methods of circulating current fault suppression,this paper analyzes the causes of the above faults and the harmonic components of circulating current and points out the limitations of the existing ***,a Common-Mode(CM)choke-based method is proposed to provide a high impedance in the path of the CM circulating *** doing so,the circulating current can be suppressed without the additional burden of the hardware and control algorithm,which is quite friendly for quality control of mass-production ***,a simplified mathematic model of the VFCF converter system is derived to calculate the minimum inductance value reference of the CM choke,which saves the weight of passive devices to the greatest ***,simulation and experimental results are studied to verify the effectiveness of the proposed method.
The reliability and fault tolerance of the PMSM system for industrial robots are very important for the electric drive system of industrial robots. In this paper, we design a highly reliable PMSM system for industrial...
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Energy storage technology plays a crucial role in the power system, and its flexibility and scalability can improve the stability of the grid side and reduce the cost of the user side. Simultaneously, storage devices ...
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