Computer search of variants for vehicle system composition synthesis

The design experience of vehicles systems composition synthesis is summerized. Some engineering techniques are suggested, which give an opportunity to solve the problems of a composition synthesis by means of a computer. These techniques are based on the following principles: construction of statistical models for the analysis of criteria behaviour; using of methods of the theory of extreme values statistics for the evaluation of the criteria limiting values; deriving of suboptimum variants groups; using of heuristic procedures for a cyclic correction of the search process in order to specify the range of boundary solutions for the problems with several criteria; using of a probabilistic appraisal for an estimation of search results; construction of educating algorithms using a fine for the variable values (composition variants); clearing up in the course of a dialogue process the interaction of an engineer with a computer.As in the design practice no requirements are extended to the algorithms of vehicle system characteristics design, that is why it is not possible at the stage of design solutions search to use the known recommendations worked out for the problems of linear, non-linear and dynamic programming.