Firstly, reasonable operating points and local linear models with their operating ranges for a nonlinear system were selected with gap metric theory.

Measurement of tiny-size clearance based on CCD image measurement;

Study of computer control system of reverse roll coating clearance;

Study on the Dynamics of Rigid Multibody with Clearance of Virtual Axis Hybrid Polishing Machine Tool;

Influence of gap on stud penetration welding process and its countermeasures;

Study on vision measurement system for gap of welding joint and torch position;

Influence mechanism of feeding servosystem with gap nonlinearity on profile machining errors;

Analysis of torsional vibration on rougher of rolling mill considering the backlash;

The Backlash Adjustment Moment Analysis on Double Cycloid no Backlash Steel Backlash Steel Ball Trausmlssion;

Identification of Nonlinear Systems With Backlash Characteristics;

Contact-impact model and its discrete schemes for revolute pairs with small clearances;

Based on the theory of contact dynamics,the dynamic model with clearances of sizing press roll was established using the method of numerical simulation.

Based on the classical clearances description of Newton-Euler and two state motions,this paper developed a new theory of creating the complex models of mechanism clearances.

Simultaneously cutting the punch and matrix and interval calculation;

In order to reduce the difference of stress level of sabot dedendum surface remarkably and the stress of dangerous dedendum surface greatly,interval meshing technology was applied to the composite sabot of high power armor piercing projectiles.

Several questions in the project which is used of the interval meshing technology has been analysed in this pa- per.