Research on the measurement of motor's torque and rotational speed

The torque ancd rotational speed of a motor are the most important two parameters ,their measurement must be accurate.According to the requirements to the measurement aviation motor by the user,this paper analyzes the measurement principles of torque and rotational speed,and points out that the measuring apparatus composed of optoelectric sensors is more suitable for measuring heavy torque and high rotational speed. Through analysis the reasons influencing measuring stability have been found out, which are the flexure strain and structure resonance produced by the transmission axle under the function of the gearing-in force of the reduction gear.This paper,through accurate calculation,takes account of the effects of the mechanical structure on the measuring stability and gives the basic principles and method of choosing the torque sensor and rotational speed sensor.Besides,the measuring accuracy of the apparatus has been considerably increased, the size made smaller, and weight lost,so that they are fit for a viation use.