The paper introduces a kind of inspection robot for high-voltage transmission lines from two parts:Mechanical structure and control system. Three arms is adopted in the mechanical structure, while the control system used a hierarchical modular control scheme is designed to a kind of three-layer control structure including the ground monitoring layer, the task decision layer and the action execution layer. The PC/104 and AT89C51 is used for the main control computer, and the MX-servo is used for the power drive components. Except for describing the robots working process of crossing obstacles in detail, the paper also introduces the responsibilities, hardware components, software design process of the control system. From the simulation experiment on motion control system using Matlab/Simulink, we can conclude that the motion control system of the robot has high-stability and reliability and meet the design requirements.

Al2O3 ceramics are widely used in aerospace, defense industry, microelectronics industry and many other fields, but the precision machining methods of this material are restricted because of the high hardness. Therefore, this paper makes an orthogonal experiment of high-speed micro-milling Al2O3 ceramics by machining full-diameter micro-grooves. The feasibility of micro-milling Al2O3 ceramics with diamond coated tools is verified. In the experiment, surface roughness values obtained are treated as evaluation indexes. And the influences of many process parameters on the workpiece surface roughness are analyzed by range analysis method. These parameters are spindle speed, feed rate and axial depth of cut. Then optimized the process parameters and obtained a set of suitable parameters to micro-mill Al2O3 ceramics.

With the development of advanced manufacturing technology, ceramic matrix composite materials, a typically hard and brittle material, have been widely used in high-tech fields such as aerospace manufacturing. Due to the anisotropy of materials, the quality of conventional processing workpieces is poor, and the processing accuracy is difficult to guarantee. In this experiment, ceramic matrix composite materials are machined by ultrasonic vibration grinding with the CBN grinding rods. The influence of amplitude on the grinding force and the surface quality of the workpiece in the grinding process are analyzed by a series of experiments on ceramic matrix composites. The results show that, compared with the conventional grinding process, in the ultrasonic vibration-assisted grinding process, the grinding force is reduced by about 60%, and the surface quality is also improved significantly,the surface roughness Sa is reduced by about 25%.

Ion beam etching can achieve nanometer size easily, processing in nanometer size, then put forward higher requirements on the workpiece surface. Ion beam etching is based on the Sigmund sputtering principle to remove the material, and the defects such as vacancies and interstitials in substrate material atomic lattice will be produced in this process. When these defects are enough, they lead to material damage. This paper is based on this effect to explore the effect of the processing parameters like Ar ion incident energy and incident angle of plasma beam on the implantation depth and the lattice change, through the SRIM software simulation which Ar ions used to the silica etching, moreover, forecast and put forward the suitable parameters for ion beam etching of nanocrystals on the workpiece, to produce the smaller nanowires damage.