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The hanger is a critical part of arch bridges which decides the security of the bridge. The tension of hanger is the major parameter to evaluate the structural behavior during the health monitoring. Besides, the damper which used for reducing the vibration significantly affects the tension of hanger. The flexural rigidity and damping stiffness should be considered in order to get accurate tension...
Vibration signal, power of spindle motor and spindle speed signal are used in the vibration controlling system of CNC milling machine. The rule of time and frequency domain features of vibration signal is got. Using Root Mean Square, power spectral density of vibration signal and the power of spindle motor, the cutting parameters of CNC machine tool is regulated. The controlling signal can control...
The robust vibration control of a flexible beam has been investigated by using H∞ control scheme. The finite element method and experimental modal test are applied to obtain the model of a beam with piezoelectric actuators and strain gage transducer. Taking into account the uncertain disturbance and measurement noise, the augmented closed-loop system with output weighting is presented by selecting...
A separation method of the vibration signal based on improved fast ICA was proposed. It adopted the steepest descent method to improve the convergence rate. Improved fast ICA method is applied to separation of vibration signal from the train's running gear. Separation results proved that the method is feasible and effective. The method is contributive and instructional to train's running gear vibration...
Parameters of ball mill load (ML) affects production capacity and energy consumption of the grinding process, which have stronger correlation with shell vibration spectrum. A novel spectral features extraction and selection approach combined with empirical mode decomposition(EMD), power spectral density(PSD), kernel principal component analysis(KPCA), genetic algorithms(GA) and partial least square(PLS)...
A numeric virtual platform of semi-automatic hydraulic upender was built in MSC.ADAMS, and discharge port was modeled flexibly. The virtual shock test of the discharge port was conducted on this platform according to the impact force models to obtain the anti-shock performance limits of the upended. This method can simplify designing and researching processes of mechanical product, shorten researching...
Based on the general process of supply chain management, this paper discusses the differences between joint inventory supply chain management and the general inventory supply chain management. Through establishing a system dynamics model, we make quantitative analysis of the key parameters of the supply chain, studying the impact of bottlenecks and the bullwhip effect on the whole supply chain, and...
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