Compensation and Control of Sinusoidal Torque Measurement Error

The transmission characteristics of physical quantities such as torque, rotational speed and acceleration are important indicators to measure the input and output characteristics of a class of gear transmission mechanisms such as steering gear. Dynamic torque loading and testing are important experiments to measure this index. Sinusoidal signal is often used as an excitation source under laboratory test conditions because of its convenient generation, arbitrary derivation, flexible adjustment of amplitude, frequency, phase and other convenient factors. However, in practice, due to mechanical reasons such as shafting installation deviation and worktable flatness, the measured value and excitation source of torque sensor often have errors. This paper takes a kind of sinusoidal torque loading device as the research object, establishes a mathematical model of shafting installation deviation and platform flatness, and analyzes and compensates the experimental data based on the least square method and sinusoidal error compensation algorithm, A control algorithm using the inverse sine fitting signal as the excitation source is proposed. The experimental results verify the effectiveness of this algorithm, and lay a theoretical foundation for the dynamic loading experiment.