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1、外文资料翻译PrefaceLong-term since, hydropower engineering fixed roll Yang type hoist (hereinafter referred to hoist) design have been used for experience, not only logic.analog design method for the design cycle longer, and only a few scheme comparison and analysis, no exact evaluation standard to measur
2、e have options, there is get judged almost optimal design. With the development and application of the electronic computer, it can establish a design process automatically choose the most effective method of optimal scheme, namely optimization design. This design method is mathematical programming a
3、nd computer technology, the combination of the solution of complicated design problem can become a tool. However, due to design some factors such as loading properties, material quality is difficult to use mathematical quantity said, leading to the design ambiguity. Ordinary optimization method has
4、not considered these fuzzy factors, lack of treating fuzzy concept means and methods, many factors of artificial as determined to undertake handling, or randomness often missed the real optimization scheme and even contradictory results. This is hoist ordinary optimization design difficult to really
5、 be engineering and technical personnel to accept the root causes of the place. Hoist the fuzzy optimization can overcome the shortcomings, it common optimization study of hoist optimization process prevalent ambiguity, using the theory of fuzzy mathematics and systematically analyzing the machine a
6、nd pulley institutions, hoisting, a transmission mechanism and frame structure, electrical systems and so on various agencies internal and external links, reasonably determine the parameters, calculation and in order to achieve optimization purposes. Using fuzzy optimization design not only can brea
7、k through the traditional design pattern, overcome experience, is used by many analogy or assumptions and simplify the calculation formula is derived for design, checking, calculation, and many limitations when can overcome ordinary fuzzy optimization design problem, a rigid ignore the constraint co
8、nditions of faults, make complex problems, blur variable accurate constraint conditions for fuzzy constraint conditions, make a design more quickly and more accurate, more reliable and more convenient. This method can greatly shorten the design cycle, reduce product material consumption, improve pro
9、duct precision and performance, and access to the huge economic benefits. Therefore, hoist the fuzzy optimization will become the industry many researchers pursuit of the goal.1 fuzzy optimization research reviewed1.1 fuzzy technologyIn 1965, the United States California university professor l. a. z
10、adeh Fuzzy (firstly put forward the concept of Fuzzy) set theory, viaM. Sugeno, based on the efforts, many scholars in the 1970s established a better fuzzy mathematics theory system. In fuzzy mathematics theory developed on the basis of high-tech - fuzzy technology is only 20 years history, but it i
11、n mechanical, electrical, chemical industry, light industry, aviation, civil, geology, water conservancy, meteorology, enterprise management and social economic and other fields, the booming its application has created huge economic benefits and social benefits. Japan in order to ensure that the com
12、petitiveness of the 21st century, establishing fuzzy basic research, fuzzy computer, machine intelligence, man-machine system, people and social system and natural systems and so on six fuzzy technology key areas for development. The United States unwilling fall behind, mainly discussed the neural n
13、etwork and fuzzy logic, and held the combination of once international fuzzy technology seminar. France to tide neuro-fuzzy institute was established to comprehensive plan to develop fuzzy technology. Germanys electronic and information department has made fuzzy technology, as one of the important r
14、esearch topic. The American market information research company (MIBC) latest survey results show that by the end of this century, fuzzy technology world markets will be 30 times greater than it is now. Fuzzy technology research in Japan, the United States, Germany, France, South Korea and other cou
15、ntries is already achievement. Our country in fuzzy technology research has their own characteristics, main performance in fuzzy mathematics theory research is very strong, but the lack of discipline, the crossover between application background is not obvious, the driving force is not strong, the a
16、ctual application research is weak links.1.2 fuzzy medicineIn the past 10 years, the domestic and foreign some mechanical science worker is continuous efforts, the fuzzy method used in the machinery science with classic set describing all concept, principle and method, the fuzzy mathematics extended to skinned people to the theory of complex and dynamic mechanical system fuzziness of understanding, gradually formed and improved fuzzy mechanical science and technology the
