To enhance accuracy and velocity of combination weighing,the paper focuses on analyzing dynamic characteristics of the combination weighing gantry,establishing mathematical model,analyzing factors of influencing dynamic characteristics of combination weighing gantry and puts forward the means of adding damper and adopting digital compensation to enhance dynamic characteristics.

This paper deals with the new type measurement unit-combined volume and weight measurement unit,presents its design charcteristics and operating principle.

The Research of Portable Combined Positioning Terminal Technology Based on FPGA;

By analysis of positioning properties about various setting styles, this paper presents a general positioning system model which is called the combined positioning system with two directions and two distinct related units, based on it a widely used general analysis method and its mathematic model about fixture setting error is built.