A calibration system of resonant high-acceleration and metrological traceability

Abstract

Acceleration sensor is usually used to test the performance of equipment under high-acceleration vibration. It is widely used in aero-engine, steam turbine and other equipment working in high-acceleration vibration environment. Calibration is an important means to ensure the accuracy and reliability of the measurement results of the acceleration sensor. Aiming at the conventional intermediate frequency (IF) calibration system using many instruments and complicated operation, this paper designs a resonant high-acceleration calibration system based resonant beam. First, the system amplifies the acceleration amplitude through the resonance of the resonant beam at the natural frequency, thereby generating high-acceleration values to calibrate the sensor. Then the vibration control algorithm of the calibration system is optimized, and the stability of the system is verified through experiments. Finally, the communication between the upper and lower computers is carried out in the vibration control system and the laser measurement system, and the metrological traceability is realized. The experimental results show that the system can effectively calibrate the sensitivity amplitude and phase of high-acceleration sensor in the frequency range of 100-2148 Hz and the acceleration range of 50-11 853 m s −2 . This calibration system is of great significance to the research on the calibration of IF acceleration sensor.

Symmetric Differential Demodulation-Based Heterodyne Laser Interferometry Used for Wide Frequency-Band Vibration Calibration

“…Wang et al [20] improved the performance of the TLI by considering the influences of periodic nonlinear errors, whose displacement measurement accuracy can highly reach 0.1 nm. Zhai et al [21] utilized the TLI to calibrate the accelerometers at medium frequencies with especially high acceleration, and its accuracy is approximately 0.3%. Yang et al [22] used the TLI to accomplish the vibration calibration at ultrahigh frequencies, which can get a similar accuracy compared with most of the National Physical Laboratories.…”

High-Acceleration Vibration Calibration System Based on Phase-Locked Resonance Control

“…Figure 2 shows the composition of the resonant amplifier IF calibration device (Dongling Co., Ltd., Suzhou, China) [ 29 ]. The standard sensor and the calibrated sensor are connected “back-to-back” as a comparison method for calibration [ 30 ].…”

Analysis of Coupled Vibration Characteristics of Linear-Angular and Parameter Identification

“…In recent years, with the rapid development of microelectro-mechanical systems (MEMS) inertial sensors, attention has been paid to the exciters used for MEMS inertial sensor calibration, and higher requirements have been placed on the output performance of the exciters [1]. Traditional sensor calibration methods often use electromagnetic exciters [2], and compared to uniaxial vibration excitation, linearangular composite vibration excitation can simulate the actual dynamic environment more accurately. An electromagnetic linear-angular vibration exciter can not only output uniaxial linear vibration and angular vibration, but also has the function of outputting linear and angular vibration synchronously.…”