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旋转超声端面铣削(RUFM)工艺方法是一种高效的脆性材料加工方法，本文提出将其应用于光学玻璃的平面加工。通过对压痕断裂力学理论、脆性材料的材料去除特性和金刚石磨粒运动学原理的分析，建立了脆性材料RUFM去除模型。在此基础上，开展了RUFM和K9钻石铣加工光学玻璃的对比试验。扫描电子显微镜(SEM)观察两种加工方式的表面形貌显示：与传统的K9钻石铣加工方法相比，RUFM以较小的碎屑完成材料去除，具有较小的径向裂纹和侧向裂纹尺寸。亚表面损伤磁流变抛光斑点检测的结果表明：RUFM可以更有效地降低光学玻璃加工亚表面损伤深度。理论和试验研究表明，RUFM工艺方法是光学玻璃等脆性材料的有效加工方法。
Rotary ultrasonic face milling (RUFM), an effective processing method for brittle materials, was introduced into fiat surface machining of optical glass. A material removal model was presented for RUFM based on the analysis of the indentation fracture mechanics theory, the material removal characteristics of brittle materials and the kinematics and dynamics of diamond grits. And the surface properties given by RUFM and diamond milling of K9 glass were compared. The surface topographies observed by a scanning electron microscopy(SEM)show that the sizes of radial cracks，lateral cracks and chipping with RUFM are smaller than with traditional processing. Subsurface damage observations of optical glass show that RUFM more effectively reduces the subsurface damage depth than traditional processing as determined by the magnetorheological finishing spots test method. This theoretical and experimental research shows that RUFM provides effective processing method for brittle materials such as optical glass.
 
 
高速大吨位起重机大量用于制造业、港口运输业和建筑业，目前是以人工操作为主，自动化程度低。为了有效解决实现起重机自动化的关键技术问题，建立了回转塔式起重机实验台，用于研究起重机动力学和控制策略的有效性。回转塔式起重机实验台由回转机构和变幅机构组成，模拟回转塔式起重机的变幅运动和回转运动。本文确定了回转塔式起重机实验台的总体结构方案以及变幅运动和回转运动的传动方案。建立对实现起重机自动化，提高工作效率、安全性价值。研究结果表明这一实验台的、可靠性有着重要的意义和价值。
High-speed and big-tonnage cranes are widely used in manufacturing, harbor-transportation and construction，but most of the cranes are operated manually with low automatization. To cope with the key technical problems and realize the automation, we set up an experimental system for rotary tower cranes so that the validity of crane dynamics and proposed control strategies could be experimented. The experimental system consists of a rotary mechanism and a luffing mechanism and is used for the simulation of luffing motion and rotating motion of rotary tower cranes. We designed not only the overall scheme for the frame of this system，but also the scheme for transmission of luffing motion and rotating motion. It is concluded that the erection of this system is valuable and significant for the crane in its automatization，efficiency, safety and reliability.