Method for forecasting production cost of airplane
A production cost and aircraft technology, applied in the field of aircraft, can solve the problems of high production cost, inapplicability, complex aerodynamic and structural design, etc., and achieve the effect of wide application range, high prediction accuracy and comprehensive consideration
Active Publication Date: 2015-04-29
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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This relational formula is more reasonable for the early pursuit of high-altitude and high-speed aircraft, because the early aircraft body structure is mainly made of aluminum alloy (the impact of different materials on cost generally does not need to be considered), and the greater the speed, the more aerodynamic and structural design. complex and thus more expensive to produce
However, with the development of air defense technology and the advancement of manufacturing technology, modern aircraft pursue stealth capabilities, maneuverability, advanced comprehensive avionics capabilities, high reliability, and economy. The maximum level flight speed can no longer be used as a representative of the advanced nature of aircraft. and the main index of manufacturing difficulty, therefore, the existing formula is no longer applicable to the budget of modern aircraft production cost, and it is urgent to develop a set of methods that can meet the budget of modern aircraft production cost
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[0011] A method for forecasting aircraft production costs, the forecasting flow chart is as follows figure 1 Shown:
[0012] Step 1: Select a comparative model similar to the predicted model, and determine the man-hours E of its airframe manufacturing L , the selection of the comparative model needs to ensure that its basic data are known (basic data include: development year, body material composition, layout form, weight, production quantity, and man-hours for body manufacturing).
[0013] Step 2: Correction of the weight of the predicted model. In the case of other factors being the same, the weight of the aircraft is directly proportional to the manufacturing man-hours. It is assumed that the complexity of the compared model is the same as that of the predicted model. The production quantity of the model is the same, and the weight correction factor K of the predicted model is 重量 =W 预测机型的空机重量 / W 对比机型的空机重量 ;
[0014] Step 3: Correction of the airframe complexity of the...
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The invention belongs to the technical field of airplanes and relates to a method for forecasting the production cost of an airplane. According to the method, the existing airplane type similar to the forecasting airplane type serves as the contrastive airplane type, and the production cost of the forecasting airplane type is corrected in three aspects of weight, airplane complexity (comprising application of advanced materials and improvement on appearance complexity) and quantity. The method takes factors which influence the production cost into full consideration, and is wide in application range, high in forecasting accuracy and applicable to budgeting of the production cost of the airplane at the project approval demonstration stage.
Description
technical field [0001] The invention belongs to the technical field of aircraft and relates to a method for predicting aircraft production costs. Background technique [0002] The existing method for predicting the production cost of an aircraft is to predict according to a set of relational expressions regressed from the weight and the maximum level flight speed. This relational formula is more reasonable for the early pursuit of high-altitude and high-speed aircraft, because the early aircraft body structure is mainly made of aluminum alloy (the impact of different materials on cost generally does not need to be considered), and the greater the speed, the more aerodynamic and structural design. more complex, and thus more expensive to produce. However, with the development of air defense technology and the advancement of manufacturing technology, modern aircraft pursue stealth capabilities, maneuverability, advanced comprehensive avionics capabilities, high reliability, a...
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IPC IPC(8): B64F5/00
Inventor 史娟娟付清马泽孟侯粉
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA