每年出版 6 期
ISSN 打印: 1948-2590
ISSN 在线: 1948-2604
FUEL CONSUMPTION MINIMIZATION FOR AGRICULTURAL AIRCRAFT CONDUCTING SPRAYING
摘要
A problem of fuel consumption minimization for agricultural aircraft conducting spraying of chemicals in a horizontal flight is considered. The problem is formulated as an optimal control one to be solved by variational methods, with particular regard to the nonstationarity of aircraft full mass during flight and to the complexity of an engine's fuel consumption characteristics. A technique, proposed to determine the optimal solution, is based on an idea of making small improvements to the well-known quasi-stationary solution corresponding to an assumption of equality between the engine thrust and the aerodynamic drag. Illustrations of numerical computations fulfilled for the agricultural airplane PZL M-15 (Soviet-Poland design) show that in the case of sufficiently intensive spray-mass expenditure the proposed optimal solution can noticeably raise the fuel saving.