中文摘要：

在探月工程中,为了实现基于空间应用光谱仪的多目标光谱探测,需要设计满足轻小型和高可靠性的二维指向机构。目前,超声电机作为驱动源,精密电位计作为一种位置传感器,因其自身的优良性能正逐步应用于精密仪器和定位技术中。基于此,设计了由超声电机、精密电位计和扫描镜组成的二维指向机构,并以一维指向模型为工程样机,通过设计闭环控制电路和指向控制机制进行功能测试,验证了该机构空间应用的可行性。为了测量精度,搭建实验室测试平台,并进行多次指向试验,通过对测试结果进行分析,提出提高指向精度的方案。

英文摘要：

In the lunar exploration project, in order to achieve multi-target spectrum detection based on space applications, designing a lightweight and highly reliable two-dimensional pointing mechanism is needed. Currently, the ultrasonic motor as a driving source and the precise potentiometer as a position sensor, are gradually applied in precise instruments and positioning technologies due to their excellent performance. Based on this, a two-dimensional pointing mechanism consisting of ultrasonic motor, precise potentiometer and scanning mirror was designed. Besides, in order to validate feasibility of the two-dimensional pointing mechanism in space applications, one-dimensional pointing mechanism model was designed and assembled as the engineering prototype, and functional test was conducted based on the closed-loop control circuit and pointing control mechanism. In order to meet the demand of accuracy test,laboratory test platform was built, several pointing experiments were carried out to measure and solutions to improve accuracy were put forward through error analysis of the test results.