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- W2922177463 abstract "Thermal field affects force measurement accuracy of piezoelectric dynamometer. To study the effect of thermal error on force measurement accuracy of dynamometer, a thermal force uncertainty model of dynamometer is proposed in this paper. Based on the theory of heat conduction differential function, the equation of thermal force over time is established. The thermal force test of dynamometer is designed, and the differential equation is used to fit the experimental curve, obtaining the theoretical thermal force model of dynamometer. From the thermal force curve at 40°, the thermal force curves at 60°, 80°, and 100°C an be predicted, verifying precision of the theoretical model. The thermal force uncertainty of dynamometer at high temperature is obtained based on the factors of force, heat, and electricity. Finally, the weights of various factors on the uncertainty are analyzed, and the results show that when the loading force is 5000 N and the temperature of heat source is 60°, 80°, and 100°, the thermal factor is the main factor affecting force measurement of the dynamometer, which lays the foundation for the practical application of the force vector test at high temperature in short-time (<10 min) force measurement like rocket engine." @default.
- W2922177463 created "2019-03-22" @default.
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- W2922177463 date "2019-12-01" @default.
- W2922177463 modified "2023-10-18" @default.
- W2922177463 title "Thermal Force Uncertainty of Piezoelectric Dynamometer" @default.
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- W2922177463 doi "https://doi.org/10.1109/tim.2019.2899523" @default.
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