This paper describes a multi-objective fuzzy global optimum design method for the design of civilengineering,according to analyze the case of unpopularization of using the optimum design method.

The realization of multi-objective fuzzy optimization in Matlab of mechanical running condition of statically indeterminate large-scale rotary kiln;

According to the UAV(Unmanned Air Vehicle) muti-objective path planning based on radar threat and fuel consumption,this paper brought forward a performance index with the multi-objective fuzzy optimization strategy and applied the dynamic weight to the heuristic function of A* pathfinding in the Voronoi diagram.

Considering the harmonious development of economy,society and ecology,the thesis established a multi-objective fuzzy optimization model for regional water-saving cropping structure which conquers the limitation that economic benefit is regarded but social and ecological benefits are ignored in the previous studies.

Then based on the twoechelon simulation model,the two objectives,operational availability and maintenance cost of the spare parts,are evaluated with fuzzy multi-objective optimization.

Taking the minimization of the tooth crown of a worm wheel and the maximization of transmission efficiency and the distance from the center as objectives,we establish the mathematical model for the multi-objective optimal design of worm transmission on the condition that the worm wheel and the worm transmission meet the requirements for load,strength and others.