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This paper deals with a functions analysis methodology of the Space Orbital Stations' and Interplanetary Vechicles' Ecological/Technical System (ETS) intended for research into various stages of the system life cycle based on methods of simulation. The man-made ecosystem of any spacecraft is distinguished from the natural ecosystem as follows: (a) Man is the decisive part of the system defining the main requirements to its properties, functions and developing laws; (b) the processes of controlled substance turnover are accomplished in the limited number of technical units at rates substantially exceeding those of slow natural processes. That is why the similar system shall be defined as the ecological/technical system. The ETS conceptual model is substantiated.

This paper deals with a Systems Approach for the Design of an Integrated Regenerative Life Support system (he IRLSS) based on physico-chemical methods of transforming of the crew metabolic-waste products to the controlled human environment components. To solve the initial problem of the technology's synthesis the following principal questions are going to be considered: (a) the formation of alternatives discrete set; (b) the elaboration of the integral and hypothesis structure fr IRLSS and its formal description; (c) the creation of the methodology and information support and the associated software. The IRLSS database and the application of the given software for the solution of the design's individual problems will also be discussed.

This paper deals with a Functions Analysis of the Integrated Regenerative Life Support System (IRLSS) that is of primary importance in forming the functional description and in predetermining the information description when in use the systems approach for the IRLSS Design. In order to attack the function temporary laws of the IRLSS subsystems and functional blocks the following the principal questions are going to consider: (a) formulating the mains' problems that may be settled when use of the function's analysis and choosing of the methods making available their solutions; (b) forming the mathematical descriptions of the technological processes and working on this basis the simulation models for the subsystem apparatuses; (c) creating the methodological and information support and associated software. The employment of given software for the solution of the design's individual problems and the some results obtained in computed experiments will discuss also.

The paper reviews one of the possible approaches to developing an analysis technique of Oxygen Generation System (OGS) thermal conditions. As an object of simulation a 30% KOH water electrolysis system with forced electrolyte circulation through the both electrolyzer chamber followed by separation of a gas/liqiud mixture using hydrophobic porous membranes. A formalized description of the key system components (an electrolyzer, set of coolers, separator, canister) is presented. A mathematical model simulating stationary and non-stationary thermal conditions of the system is constructed and its programming is reviewed. Some results of computational and operational experiments obtained for checking the model adecuacy are presented.

This paper deals with the Functions Effectiveness Model (FEM) for Design of the Integrated Regenerative Life Support Systems (IRLSS) based on the physico-chemical methods of the crew metabolic–waste products transformation to controlled components of human environment and intended for the initial problem solution of the IRLSS technology synthesis. The Functions Effectiveness Model of the IRLSS is utterly based on the conceptual model of the Manned Orbital Station Ecologic–Technical System (1), which includes the IRLSS and links of environment: the Space Station Design, the Spaceship crew (CREW), the Space Cabin Atmosphere (SCA), the Thermal Control System (ThCS), the Energetic-Support System (ESS) and the Auxiliary Systems (AS).

The paper is dedicated to adequacy analysis of Simulation Model of Human Body Thermoregulation System (HTSSM), intended for design of air/space Autonomous Life Support System (ALSS) The formal description of the HTSSM consists 51 equations to describe different body compartments, which consider different properties and individualities of human body as well as complexity dynamic characteristics of the studied functional system, and also includes the equation, which describes heat exchange processes in the heart and lung area. Active heat exchange mechanisms of thermoregulation system are described on the basis of fuzzy set theory. This paper discusses the HTMSS and its applications for: The analysis of a human heat state under heat stress conditions for a helmet area ventilation system design. The analysis of the temperature/moisture fields in the extra-vehicular suit for design of thermal control system. The results of computed experiments obtained using the HTMSS are also reviewed.