Aerospace Instrument-Making Annotation << Back determination of optimum thermal insulation thickness in the cockpit and passenger compartments for a range aircraft Nikolaev V.N. Gusev S.А. The method for determination of an aircraft compartment thermal condition, based on a mathematical model of a compartment thermal condition was developed. A symbolic model of the system of a pressurized heat insulated compartment with air-conditioning systems and not pressurized and not insulated compartments can be represented by a system of one-dimensional equations of an insulating lining, windows and ordinary difference equations of convective heat transfer of the inner surface of the heat insulation of the lining and inner surface of the lining in not insulated compartments, seats, on-board equipment. The factor of a radiant exchange in the model is defined by Monte-Carlo method. Development of solution techniques for solving heat exchange direct and inverse problems and for determining confidence intervals of parametric identification estimations was carried out. Confidential intervals of estimations of factors nonlinear mathematical model of a thermal condition of a compartment of a kind can be defined with the help dispersion matrix errors of estimations required factors of model. The method of displaying of joint confidential area of estimations on co-ordinate axes of space of factors is thus used. As object of research the prototype of Brazilian main plane Embraer 190 has been accepted. Researches were spent according to Norms of flight validity Federal Aviation Regulations part 25, USA. The required performance of air-conditioning, ventilation systems and heat insulation depth of crew and passenger cabins were received. Key words: mathematical model, thermal state, direct and inverse problem, air-conditioning systems, temperature, aircraft. Contacts: E-mail: sag@osmf.sscc.ru Pp. 46-55.