Underwater navigation system is an indispensable part for autonomous underwater vehicles.Due to the indiscernibility of satellite signal,however,the underwater navigation problem is quite challenging,and a satellite-free navigation scheme should be looked
This paper investigates the problem of a 2-D plate containing internal cracks at arbitrary angles to the heating surface under thermal shock.The finite difference method is applied to solve the temperature distribution and a difference scheme of the obliq
The radial ultrasonic rolling electrochemical micromachining (RUR-EMM) combined rolling electrochemical micromachining (R-EMM) and ultrasonic vibration was studied in this paper.The fundamental understanding of the machining process especially the interac
Precision and low damage grinding of aviation optical elements can effectively improve the overall processing efficiency.The mechanism of high-speed cross scuffing of multiple abrasive particles has become an important factor affecting the forming quality
The tracking control problem for Flexible Joint Manipulator Control System (FJMCS)with unmeasurable states is addressed in this paper.Firstly,a High-Gain Observer (HGO) is con-structed to estimate the unmeasurable states and the uncertainties.Then,a Dynam
Fabrication of the surface micro-texture on the C-plane sapphire is undertaken by a 355 nm Ultraviolet (UV) pulsed laser.The surface micro-textures of sapphire with different laser scanning line spacing ranging from 10 μm to 100 μm are obtained,where the