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Early fault diagnosis of the rolling bearing and maintenance has great significance for the safety production of large automation machinery and equipment and avoid big accidents. With high precision sensor acquisition of bearing vibration signal, this paper adopts the wavelet packet de-noising technology to eliminate the noise in test signal, on the basis of keeping small fault characteristic information...
Levitation control in micromachined electrostatically suspended gyroscope (MESG) is a typical non-linear control, so it is difficult to obtain precise mathematic model when the rotor moves far away from the null position, and it is also hard to meet the requirement of rapidity, stability and robustness using only traditional Proportional Integral (PI) control separately. Aiming at the nonlinear characteristic...
In the novel prototype of magnetic mass detection structure, the new configured capacitance sensing scheme for the mass detection is analyzed and the circuit detection scheme is implemented. The lock-in amplifier is employed in the capacitance detection to restrain the noise interference. The capacitance analysis using Pspice and Ansys APDL indicates the sensitivity of the detection along 5-DOF (degree...
Based on the analysis of the spectrum and phase plane trajectory of abnormal vibration signals of the CSP rolling mill, this paper studies the phase space reconstruction of the time series signals of abnormal vibration of the rolling mill and relevant technologies, and calculates the maximal Lyapunov exponent of abnormal vibration signals under various sheet rolling conditions. Results show that the...
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