Ma Hongwei

Research on motion control system of mine rescue robot

According to demand of six-pedrail mine rescue robot in a complex enfironment, it is designed as modularization of hardware architecture based on upper and lower processor of multi-cpu, using IPC as the central computer. The motion control system software is built though VC++. The experiments show that the system can conrol two drive-motors and four-arm motors well, and the demand of motion montrol mystem of mine rescue robot is met. Motion control system of mine rescue robot has good real-time, reliability, accuracy, and openness.

A Method to Simulate Acoustic Field of a Linear Phased Array Transducer

This paper is intended to apply the spatial impulse response method to simulate the acoustic field of a line phased array transducer. The focus laws of ultrasonic linear phased array and the expressions of the acoustic field are obtained utilizing the impulse response of rectangular transducer. Simulations are carried out for a linear phased array transducer in different focusing angles. It is shown that this method can efficiently and accurately predict the radiation field of linear phased array transducer over a wide range of steering angles.