RU2050016C1 - Method for diagnostics of state of object that has electronic system for monitoring its characteristics - Google Patents

Abstract

FIELD: computer engineering. SUBSTANCE: device has memory unit, at least one unit for conversion of small values of object characteristics, which is connected to one output of memory unit. digital-to-analog converters are connected to other outputs of memory unit and to output of unit of conversion of small values of object characteristics. Outputs of digital-to-analog converters are connected to units for generation of outline two-dimensional shapes. Serial circuit, which contains unit for generation of combinations of outline two-dimensional shapes and visualization unit are connected to said units for generation of outline two- dimensional shapes. User interface unit is connected to visualization unit. User interface unit provides possibility for operator to interact with visualization unit. Device provides possibility to monitor object state during all operations of object instead of pre-determined transition modes. EFFECT: increased sensitivity to early indications of object faults, increased resolution, increased functional capabilities. 4 dwg

Description

 The present invention relates to monitoring and diagnostic devices, and more specifically relates to a device for diagnosing the state of an object having an electronic monitoring system of functional parameters.

 The invention can be used for technical diagnostics of power plants of aircraft, ships, cars and other industrial equipment having a system for continuous monitoring of functional parameters.

 In addition, the proposed device can be used in medical diagnostic systems associated with the monitoring of physiological parameters of patients, as well as in global information systems for technological processes.

 At present, the idea of creating an interactive human-machine system, which is used, in particular, for monitoring, diagnosing, and real-time forecasting the state of various objects, is of particular importance.

 The main idea of creating hybrid analysis systems is to develop such an informational interaction of the operator with the source of information, in which in the decision-making process not only logical levels of human consciousness are used, but also subconscious levels associated with the mechanisms of creative imaginative thinking. In this case, the most promising in terms of application turned out to be methods of visual impact on the subconscious of the operator with special objects from the screen of a computer display.

 Interactive systems of figurative diagnostics are known, in particular, aircraft gas turbine engines, developed on the basis of a synthesis of the methodology of figurative analysis, logical mechanisms of expert systems and special methods for generating initial parametric descriptions in transient modes of operation of these engines. The figurative analysis, which forms the conceptual basis of the interactive system of figurative diagnostics, ensures the uncriticality of the analysis system to the structure and dimension of the source digital data due to dialogue adaptation to descriptions of any kind and, as a result, the effective isolation of diagnostic features.

 For well-known interactive systems, it is necessary to ensure strict repeatability with each implementation of the diagnostic procedure; otherwise, instead of persistent manifestations of signs of malfunctions, a process of loss of sensitivity of the dialogue system is observed.

 In addition, with the help of such interactive systems it is practically impossible to carry out an operational forecast of the technical condition of the studied object.

 It is also known a device for diagnosing the state of an object having an electronic system for monitoring functional parameters (SU, A, 1617317), containing a memory block that contains information about discrete digital values of the functional parameters of the object coming from the monitoring system, digital-to-analog converters, electrically connected to the memory block and connected to blocks for forming contour planar figures connected to a block for forming volumetric combinations of contour planar figures, to which one input of the visualization block is connected, the other input of which is connected to the user interface of the visualization block.

 The known device is intended for diagnosing the technical condition of gas turbine engines of aircraft. In this case, the measurement and recording of digital values of functional parameters was carried out with a given frequency during acceleration of the aircraft at a fixed-speed throttle response due to automatic movement of the engine control lever at a given pace from the low thrust mode to the maximum thrust mode.

 The recorded digital values were converted into a set of geometric images in the form of continuous lines, which were closed by a set of service continuous lines to obtain closed flat images, which were converted into a spatial figure, the surface shape of which carries the necessary diagnostic information.

 A necessary condition for the successful operation of the known device is its use in such modes of operation of the object, which ensures strict uniformity of control actions on the diagnosed object, which is the pickup mode for gas turbine engines of aircraft.

 In this case, the identity of the obtained characteristics is ensured by the identity of the movement of the engine control stick, and the operator in the person of the pilot performs the role of a sensitive automaton, which in some cases varies by control (engine operation), and these control variations are a negative sign, because the generated diagnostic signs vary much more strongly, than expected. Moreover, in some cases it is generally impossible to ensure a strict identity of the control actions. All this leads to a decrease in the sensitivity of the diagnostic device.

 In addition, using the known device is very difficult, and sometimes impossible to carry out reliable forecasting of the technical condition of the investigated object.

 The aim of the invention is the creation of a device for diagnosing the state of an object having an electronic parameter monitoring system, in which, due to the introduction of a new unit, which allows diagnosing the state of an object not at pre-selected transient modes, but during the entire operation of the object, the device's sensitivity to early signs of malfunctions would be increased of the studied object, the resolution would increase and it would be possible to use the device to diagnose any x studied objects equipped with a monitoring system of functional parameters.

 This is achieved by the fact that an object state diagnostic device having a functional parameter monitoring system containing a memory unit that contains information about discrete digital values of the object functional parameters coming from the monitoring system, digital-to-analog converters electrically connected to the memory unit and connected to the forming units contour planar figures connected to the block for forming volumetric combinations of contour planar figures, to which one is connected the course of the visualization block, the other input of which is connected to the user interface of the visualization block, contains at least one block for converting small digital values of the object’s functional parameters, with an input connected to one output of the memory block and an output to the input of the corresponding digital-to-analog converter.

 It is advisable that the unit for converting small digital values of functional parameters contains a discriminator, a processor, the first input of which is connected to the output of the discriminator, and the second input receives a signal from the corresponding output of the memory unit, and the task unit of the conversion program connected to the third input of the process.

 The proposed device has high sensitivity, since information about the state of the diagnostic object is not recorded on the previously allocated and specially agreed transient modes, but in the process of all work. In this case, due to the introduction of small digital values of the functional parameters into the device of the conversion unit, as well as due to its specific circuit design, the input parameter is modified and the operator in the process of diagnosis extracts the most accurate and reliable information from the object in the same type of areas, since the case should not regulate the input information flows.

 In addition, working in the diagnostic mode, the proposed device provides a higher degree of repeatability of diagnostic signals, due to the method of formation and, despite the dependence on a large number of unaccounted factors, even at the same transient diagnostic modes, eliminates large variations in the output signal.

 It should also be noted that in the proposed device, the resolution is increased and sensitivity to early signs of malfunctions of the studied object is increased by 7-30 times compared with the known technical solution.

 Due to its versatility, the proposed device can be used for the diagnosis of the state of any objects, for example, such as objects of technology, information networks, biological objects and others.

 The invention is illustrated by a description of a specific embodiment, examples and the accompanying drawings, in which figure 1 shows a block diagram of a device for diagnosing the state of an object having an electronic monitoring system of functional parameters; figure 2 diagrams of the technical condition of the engines of the aircraft N 49, obtained using the patented device; figure 3 is the same as in figure 2, for the aircraft N 33; in Fig.4 the same diagrams as in Fig.2 obtained using a known device (according to SU, A, 1617317).

 The device for diagnosing the state of an object having an electronic monitoring system of functional parameters contains block 1 (Fig. 1), which contains (receives or records) information about discrete digital values of the functional parameters of the object coming from the monitoring system (information is conventionally shown by an arrow).

 The device contains a group of digital-to-analog converters 2 (four in the described embodiment), the number of which is generally determined by the number of diagnosed functional parameters of the object, and the corresponding number of conversion channels is formed.

 The device comprises at least one unit 3 for converting small digital values of the functional parameters of an object installed in one of the conversion channels and comprising a discriminator 4, a processor 5, and a unit 6 for setting a conversion program. In this case, the discriminator 4 is configured to perform the process of calculating the difference between adjacent discrete values of the selected parameter and the input is connected to one output of the memory unit 1, and the output is to the first input 7 of the processor 5, the second input of which receives an unreformed signal from the same output of block 1.

 The third input 9 of the processor 5 is connected to the conversion program selection unit 6, in accordance with the program of which the operation of the processor 5 is set.

 The conversion program (function) determines the trajectory of the diagnosed object in the phase plane of the processed functional parameter.

 The processor 5 selects a certain region of the phase plane of the functional parameter, which corresponds to that channel of the parameter conversion of the object in which block 3 is installed.

 The outputs of digital-to-analog converters 2 are connected to blocks 10 for forming contour planar figures, to which a block 11 for forming volume combinations of contour planar figures is connected, connected to a block 12 of visualization (computer display), which depicts voluminous diagnostic figures called object state diagrams.

 The operator 13, which has the ability to interactively affect the user interface 14 of the visualization unit, captures the moment and rate of development of malfunctions by the value of the deformation of the contours of geometric images and changes in their parameters in comparison with the reference state diagrams. The operator 13 is a necessary element of the human-machine system, which essentially is the proposed device. The direction of communication with the operator 13 reflects the functional relationships that determine the information flows and control human influences.

 The device forms an interactive system for real-time forecasting and diagnostics of the state of the object, which carries out the transformation of the functional parameters of the object, taken in any mode of the diagnosed object at any time during which all the processed useful record is used by the diagnostic system to build three-dimensional figures on the display screen.

 In FIG. 2.3 presents a diagram of the technical condition of dual-circuit turbojet engines of the aircraft N 49 and N 33 (conditional numbers), constructed using the proposed diagnostic device, and the upper row of diagrams corresponds to the left and lower right engines.

 FIG. 4 illustrates technical condition diagrams for aircraft No. 49 constructed using a known device (SU, A, 1617317).

 The proposed device for diagnosing the state of an object having an electronic monitoring system of functional parameters, works as follows.

 The input and output functional parameters of the diagnostic object coming from the electronic monitoring system are recorded in the memory unit 1. In the described case, when there is one conversion unit 3, one parameter is selected from the input parameters, which is converted in the conversion unit 3. As a rule, the parameter most correlated with the controlling input actions is selected as such a parameter.

 The signal corresponding to the digital value of the selected parameter is fed directly to input 8 of processor 5 and to input of discriminator 4, in which the difference between the current and previous value of the analyzed parameter is calculated.

 The output signal from the discriminator 4 is fed to the input 7 of the processor 5. In fact, the input signals for the processor 5 are the input signal and the difference signal correlated with the time derivative of the original signal.

According to the dependence generated by the conversion program task unit 6, the processor 5 converts two input signals into an output signal, in other words, the phase plane of the diagnostic object is converted in accordance with a predefined function recorded in block 6. The specific form of this function is determined by many factors, such as features of the control object, features of the phase plane of the device, features of operational limitations, the parameters of which are subject to scatter. For example, aircraft engine works in temperature range from plus 60 to minus ⁶⁰ ° C, the range of heights from 0 to 20000 m, the range of engine speeds from 0 to 10.5 tys.ob / min and so on.

 On the basis of empirical selection, a specific type of function is determined that provides the maximum repeatability and sensitivity of the diagnosed functional signs reflected in the visualization block 12.

 The signal corresponding to the parameter value calculated by the processor 5 is supplied to one digital-to-analog converter 2, to the other digital-to-analog converters 2, the signals from the memory unit 1 are received in the original (non-converted) form.

 In all digital-to-analog converters 2, digital signals are converted into continuous lines and fed to blocks 10, which form planar figures (images).

 With the optimal setting of the transformation law, the flat contour formed in block 10 becomes significantly more sensitive to stable changes in the state of the diagnosed object by the signs of shape, as a result of which volumetric state diagrams formed in block 11 are more sensitive to early signs of malfunctions of the studied object.

 The three-dimensional state diagram obtained in the visualization block 12 (on the display screen) is the object of subsequent visual recognition by the operator 13, which, based on the comparison of the analyzed image with the reference images of the healthy and faulty states, decides on the type of malfunction and the degree of its development.

 Providing the proposed device with a stable repeatability of the research results (with an unchanged state of the object) makes it possible to observe completely identical diagnostic figures on the display screen. Therefore, using the proposed device for diagnostic purposes and obtaining stable results, it is possible to exclude additional (control) measurements, because identical images on the display screen indicate that the state of the object remains unchanged. The introduction of the conversion unit 3 into the device increased the resolution of the proposed device in comparison with the known technical solutions of a similar purpose, and increased the sensitivity to early signs of malfunctions of the object under study by at least 7-30 times, that is, if the known device distinguishes, for example, five states of the studied object, the proposed device is able to distinguish on average 30-50 similar states, which allows us to talk about the proposed device as a "device reinforced information. "

 The process of diagnosing the state of an object during the entire time of its functioning, and not at previously agreed transitional modes, also increases the sensitivity of the device and makes it suitable for diagnosing almost any objects equipped with an electronic monitoring system.

 The proposed device does not replace regular monitoring systems, but is their functional complement to reliably identify the beginning of a change in technical condition and predict the evolution of this change. At the same time, due to the high reliability of diagnostic signals, the device can significantly reduce the time it takes to evaluate false diagnostic messages from systems and see diagnostic signals hidden for other instrumental control devices in the original array of numbers.

 For a better understanding of the advantages of the invention, specific examples are given when the objects of diagnosis were aircraft dual-circuit turbojet engines of aircraft N 49 and N 33.

 The device was implemented on the basis of PC 1VM-AT. The first PC was connected to the on-board flight data storage device via an interface device. The interface device contained a standard data transmission interface in a PC and a processor 7 that performs the conversion of digital signals according to a given law. The data of four flights performed on 04/11/91, 12/04/91, 04/14/91 and 04/15/91 on airplane No. 49, and four flights of airplane No. 33 on 03/20/92, 03/28/92, 03/30/92, and 03/31/92 were entered into the PC. The contours of planar images were formed from the values of three parameters: instantaneous fuel consumption, high-speed rotor speed and low-pressure rotor speed. Visualization of diagnostic data was carried out on the display screen in the form of three-dimensional state diagrams.

 Figure 2 presents the state diagrams of the left engine of the aircraft N 49 (upper row) and the right engine (lower row).

 FIG. 3 illustrate similar state diagrams of aircraft N 33, which has been serviceable. When comparing the diagrams in figures 2 and 3, it follows that the right engine of the aircraft N 49 contains two latent faults: an internal fuel leak in the fuel supply system and a violation of the adjustment of the rotor speed control system, manifested in the form of a sharp change in the shape of the diagrams of the right engine of the aircraft N 49 in comparison with the same diagrams of a working aircraft N 33 (figure 3).

 The first engine of the aircraft N 49 also has a hidden malfunction in the form of a violation of the adjustment of the automatic flight control system. The corresponding deformations of the diagrams are visible in FIG. 2 in comparison with the diagrams reflected in FIG. 3.

 On the presented copies of the display screen (figure 3) visualized diagrams of serviceable right and left engines of the aircraft N 33.

 It is characteristic that in Fig. 4, which reflects the state diagrams of the same aircraft, N 49, obtained using a known device (SU, A, 1617317), the previously mentioned malfunctions were not observed at these stages and it could be concluded that the aircraft is operational. In addition, malfunctions identified by means of a patented device are completely inaccessible for detection by regular on-board and ground control systems.

 From the analysis of the state diagrams of the aircraft N 49 (figure 2) it is clear that an increase in deviations from the observed problems is not observed. Therefore, according to the indicated aircraft N 49, it is possible to give a forecast that in the next flight (without eliminating the noticed malfunctions) the aircraft will retain the same state for the time being.

 From the above it can be concluded that the proposed device is a system for early diagnosis and prediction of the condition of almost all types of objects that have a monitoring system.

Claims (1)

 DEVICE FOR DIAGNOSIS OF THE CONDITION OF THE OBJECT HAVING AN ELECTRONIC SYSTEM OF MONITORING FUNCTIONAL PARAMETERS, containing a memory block and the number of diagnosed object parameters conversion channels, each of which includes a block for the formation of contour planar figures and a group of digital-to-analog converters connected to the outputs with memory inputs connected to the inputs with memory inputs with the corresponding inputs of the block for the formation of contour planar figures connected by an output to the corresponding input of the block volumetric combinations of planar planar figures, connected by an output to the information input of the display unit, connected by a control input to the output of the display output control unit, characterized in that at least one unit for converting small digital values of the object functional parameters is connected to the conversion channel and connected to the corresponding the output of the memory unit, and the output to the input of the corresponding digital-to-analog converter, while the unit for converting small digital values functional parameters of the object contains a program task unit, a processor and discriminator, the output of the program task unit is connected to the control input of the processor, the output of which is the output of the unit for converting small digital values of the object’s functional parameters, the discriminator input is combined with the first information input of the processor and is the input of the unit for converting small digital values of the functional parameters of the object, and the discriminator output is connected to the second information input of the processor.

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