针对直线超声电机机械特性测试问题,建立了基于虚拟仪器的直线超声电机机械特性测试系统.设计了力与速度测试系统,为测试的直线电机提供加载,配置的压力传感器与直线型光电编码器分别用于电机输出力与速度的测量,利用虚拟仪器技术搭建了测试硬件平台.利用虚拟仪器编程语言LabVIEW对各个模块进行软件设计,以实现各自的功能.利用该系统对杆式直线超声电机和双变幅杆V形直线超声电机的机械特性进行了测试,测试结果证实该测试系统的可行性,为直线超声电机机械特性测试提供了所必需的条件.%A test system based on the virtual instrument is developed for measuring the mechanical characteristics of the linear ultrasonic motors. An experimental setup is designed and constructed to measure the output force and the speed. It can provide the load for the linear motor to be tested. The pressure sensor and the linear optical encoder are used to measure the output force and the speed of the motor, respectively. A test hardware platform is built using virtual instrument technology. In order to achieve the function of each module, software design is implemented using the virtual instrument programming language Lab-VIEW. The performances of the rod-shaped linear ultrasonic motor and the V-shaped linear ultrasonic motor using two bar-type vibrators of variable cross-section are measured using the test system. Experimental results show that the test system is practical. The present work provides a necessary condition for mechanical characteristic measurements of the linear ultrasonic motors.
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