Analyzing the characteristics in designing modern machinery,the connotation and research contents to be studied,technical flow,key techniques,R&D of supporting software and application rules of VOD are all determined so as to build a theoretical frame of methodology.

Using cooperated optimization method to realize the designing optimization of complex mechanical system;

Design of miniature milling machine mechanical system for teaching;

"Black box"design for mechanical system of automatic production line of thin piece punching from coiled materials;

Data storage of machinery system topology structure based on graph;

The fault in machinery system accompanied by fault information from low to high layer.

Take JT1035D as an example,introduce existing safe problem of the machine system and the electricity systems.

Using these conditions, the failure rules and failure types of machine system by beginning with maintenance modes, maintenance period, average maintenance expense and taking these factors, which influence system maintenance into consideration.

The paper compares the differences among the machine system reliability,electric system reliability and the structure system reliability,and introduces the main point of the new theory of elements relative machine system.

Application of GM(1,1, ω~*)methods in the life prediction of mechanical systems;

Dynamics digital simulation of mechanical systems based on Simulink;

In view of the fact that the problem of the multi-objective optimization of the reliability of mechanical systems with conflicting attributes is incapble of being solved by means of conven-tional mathematical programming techniques, a synthetic coordination method based on fuzzy optimization decision-making is presented to solve this problem.