Based on the analysis of the pitch error measure theorem for screw,the dynamic measure system of pitch error for lead screw constituted by single-chip microcomputer is discussed.

The cause of pitch error of NC machine tool and the principle of error compensation were analyzed.

Measuring and compensation for screw pitch error of NC machine;

This paper introduces a principle to compensate the screw pitch error processed in CNC machine tools, as well as a system to measure the screw pitch error based on laser interferometer.

Applying TCA(Tooth Contact Analysis)and LTCA (Loaded Tooth Contact Analysis) techniques,the influence of pitch error on the meshing behavior of aviation spiral bevel gears with contact ratio 2 0 was studied.

Based on the existing study of incoherent dual point-source counteracting anti-radar missile (ARM),the attacking process of ARM was researched through analyzing the homing and moving theory of ARM,and the error distance of ARM disturbed by dual point-source was probed into.

And then the error distance of ARM disturbed by dual point-source was probed into.

New manipulator calibration method based on screw theory and distance error;

In order to improve the precision while the new system corrects distance error,a new method was proposed by error analysis and emulation computation.

Constraint equations were constructed by using distance error model,and the actual geometric parameters of the robot were solved,and then these parameters were used in the modified kinematics model.