Одержано математичний опис процесів гене-рації водню у вигляді системи диференційних рів-нянь та вираз для передаточної функції генера-тора. За допомогою логарифмічних частотних характеристик генератора водню ідентифікова-на наближена математична модель генератора у вигляді амплітудно-частотної характеристики. Запропонований алгоритм контролю технічного стану генератора водню із використанням його наближеного математичного опису Ключові слова: генератор водню, газогенера-тор, технічний стан, частотні характеристики, алгоритм контролю Получено математическое описание процессов генерации водорода в виде системы дифференци-альных уравнений и выражение для передаточной функции генератора. С помощью логарифмических частотных характеристик генератора водоро-да идентифицирована приближенная математи-ческая модель генератора в виде амплитудно-ча-стотной характеристики. Предложен алгоритм контроля технического состояния генерато-ра водорода с использованием его приближенного математического описания Ключевые слова: генератор водорода, газогене-ратор, техническое состояние, частотные харак-теристики, алгоритм контроля UDC 661.961; 861.968

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Purpose. To construct a model of extinguishing a spill fire spreading on a nonsmooth horizontal surface using water mist. Methodology. A force balance equation for the forces influencing the spilled liquid spread has been worked out. The equation takes into account the change in the mass of the spilled liquid due to its burnout and possible inflow in the case of a continuous spill. Filling of the surface irregularities in the spill area has also been taken into account. There has been worked out a thermal balance equation for the fuel surface under sprayed water mist, based on the assumption that the water droplets completely evapo rate before they reach the surface of the burning fuel. Findings. The dynamics has been obtained for the radius change of the fuel spill for the spread and burnout on a nonsmooth horizontal surface under the assumption of a circular shape of the spill. Relation has been determined between the time required to suppress a spill fire with water mist and the intensity of water feed. Originality. The scientific originality consists in taking into account the surface irregularities and fuel burnout during the spill spread, as well as determining the time required to suppress a spill fire with water mist, depending on the intensity of the water feed. Practical value. The proposed model for the fuel spill spread and fire extinguishing can serve as the basis for the design of a fire protection system for the processing equipment and, in particular, of an automatic water mist fire extinguishing system, at oil ex tracting and oil refining facilities.

A method for determining the dynamic parameters of the operator of a mobile fire engine based on a segway, which fully characterize its dynamic properties – delay time and inertia was developed. The development of the method includes four stages. At the first stage, the problem of obtaining analytical relationships for determining the dynamic parameters of the operator is solved. These relationships include the frequency characteristics of the operator at a fixed frequency and its static parameter. At the second stage, the choice of a fixed frequency is substantiated using a criterion that minimizes errors in determining the dynamic parameters. It is shown that the fixed frequency for the characteristic parameters of the operator does not exceed 0.5 Hz. The third stage includes substantiation of the procedure for determining the frequency characteristics of the operator and its static parameter. The frequency characteristics of the operator at a fixed frequency and its static parameter are determined numerically. This procedure is based on using the data obtained by measuring the values of the operator’s transfer function at fixed time intervals. To obtain data, an interactive analog engine is used, which can also perform the functions of a simulator. The time intervals are chosen according to the Kotelnikov-Nyquist-Shannon theorem. At the last stage, the procedure for determining the dynamic parameters of the operator of a segway-based mobile fire engine is described. It is shown that the error in determining the dynamic parameters of the operator of a mobile fire engine does not exceed 9.0 %, if the error in determining its frequency characteristics at a frequency of 2.5 s–1 does not exceed 2.0 %

Algorithms for the control of the technical mill of gas generators in the systems of protection and supply of water, as an element of the systems of fire prevention. Algorithms for monitoring the dynamic parameters of gas generators of gas generators to control the flow and transmitting test signals to two types - from the viewer of the linearly growing function, or from the viewer of the straightforward view. One hundred percent before such test signals are broken down direct and indirect methods of control of the technical mill of gas generators in the systems of recovery and supply of water. It is shown that in the implementation of direct methods of control, no middle value of the parameters in the gas generators begins. To such parameters, the transmission efficiency is applied and continuously for an hour, as they characterize the dynamic power of gas generators in the systems of securing and supplying water. When implementing indirect methods of control, the integral characteristics of gas generators begin. In the quality of the information parameters, which are used to formulate the control algorithms, vibrating the vice in the empty gas generator of any average value. The values ​​of these parameters are changed at two april given time of the hour, or at april given interval hour. In the quality of the criteria for the result of the control of the technical mill of the gas generators, the tolerance criteria are determined. It is shown that the priority in the vibration of the algorithm for the control of the technical mill of gas generators in the systems of gas generators and the supply of gas generators to the algorithm, which is based on the test signal in the form of a straight-flow gas generator. It should be considered that, when implementing such an algorithm, the control of the technical mill of gas generators in the systems of ensuring that the supply of vitality is kept to a minimum is minimal.

При формуваннi алгоритму контролю технiчного стану генераторiв водню в якостi вихiдних даних використовуються їх амплiтудно-частотнi та фазово-частотнi характеристики. При використаннi класичного методу визначення таких характеристик мають мiсце декiлька недолiкiв. Одним iз суттєвих недолiкiв є великий час, який необхiдний для формування масиву вихiдних даних. Для скорочення цього часу визначення частотних характеристик генератора водню здiйснюється за результатами вимiрювань його перехiдної функцiї в дискретнi моменти часу. В цi моменти часу перехiдна функцiя апроксимується функцiями Хевiсайда. Такий пiдхiд дозволяє скоротити час визначення частотних характеристик генератора водню на 1-2 порядки. Використання теореми Котельнiкова-Найквиста-Шеннона для визначення цих дискретних моментiв часу пов'язано iз невизначенiстю стосовно максимальної частоти спектру тест-сигналу. Для зняття цiєї невизначеностi вибiр дискретних моментiв часу для вимiру перехiдної функцiї генератора водню здiйснюється за умови допустимої похибки її апроксимацiї. Похибка апроксимацiї визначається за результатом розв'язання тест-задачi, в якiй в якостi еталону частотних характеристик використовуються модельнi характеристики. Показано, що при iнтервалi дискретностi (0,252,5) мс величина такої похибки не перевищує 1,7 %. Враховано iнерцiйнi властивостi пристрою для формування тест-впливу. Показано, що доцiльнiсть використання такої процедури має мiсце, якщо еквiвалентна постiйна часу такого пристрою перевищує величини постiйних часу генератора водню. Iнерцiйнi властивостi врахованi шляхом введення додаткового множника, який мiстить еквiвалентну постiйну часу пристрою, в аналiтичних виразах для частотних характеристик генератора водню Ключевi слова: генератор водню, вихiднi данi, частотнi характеристики, тест-задача, похибка апроксимацiї

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In relation to the main element of the hydrogen storage and supply system based on the hydro-reacting composition – the gas generator – an algorithm for its control has been developed. The development of such an algorithm is carried out in three stages. At the first stage, the problem of formalizing the hydrogen generation process is solved. Formalization of this process is carried out using the transfer function of the gas generator. The use of the criterion for the minimum error of the mismatch of the given amplitude-frequency characteristics of the gas generator allows to represent its transfer function in the form of a transfer function of the inertial link. At the second stage, the problem of determining the conditions for the occurrence of self-oscillations in the pressure stabilization subsystem is solved. A prerequisite for the emergence of a self-oscillating mode of operation of the hydrogen storage and supply system is the presence of a relay static characteristic of the pressure sensor. For the characteristic parameters of such a system, the ranges of values of the parameters of self-oscillations, frequencies and amplitudes, are determined. For these parameters, analytical expressions are obtained, which include the main parameters of the pressure stabilization subsystem in the hydrogen storage and supply system. At the third stage, the problem of forming a gas generator control algorithm is solved. As a test action in the implementation of the control algorithm, self-oscillations in the pressure stabilization subsystem are used. The control algorithm for the gas generator of the hydrogen storage and supply system includes determining the parameters of self-oscillations and comparing their values with the values obtained a priori. A typical diagram of a hydrogen storage and supply system is presented, in which the developed gas generator control algorithm is implemented