RU2552576C1 - Computer-aided test complex for spacecraft electric tests - Google Patents

Abstract

FIELD: aircraft engineering.

SUBSTANCE: proposed complex comprises manual control board, primary and standby central control board, primary and standby central computer, primary and standby channels of matrix instructions output and multiplex exchange transponder, discrete signal receive-and-process device, microsystem for measurement of voltage and resistance in circuitry, discrete contactless and contact signals output device, telemetry data receive-and-process device and power supply, all being interconnected in a definite way. Central computer comprises computing unit, supply bus control unit, coupling control unit, analogue signal input and standardization unit, unit to receive telemetry data via low-frequency channel, multiplex exchange unit, unit to test pyrocartridge circuits flow and Ethernet switch, all being connected in a definite way. Central control board incorporates tests control unit, monitors, I/O devices.

EFFECT: higher reliability.

3 dwg

Description

Application area

The automated test complex is designed to provide comprehensive electrical tests of spacecraft in the mode of simulating the operation of the product and verifying the operability of its individual systems and the product as a whole at the manufacturer of the product and in the operating organization. The complex provides tests of the spacecraft in real time of the product, as well as complete galvanic isolation of the complex from the product.

The claimed automated test complex can be used to test complex electrical and electronic devices in the defense and civilian industries.

State of the art

Known satellite testing system (Satellite Testing System) according to patent for invention No. JP 2000095200. In the patent description, the satellite under test contains four components connected to the on-board computer via the MIL-STD-1553 interface. The ground test device is represented by one unit, which is connected via a connector to the satellite’s internal interface MIL-STD-1553. In tests, the ground-based test device sends test programs for each satellite component.

A feature of the patent is that all satellite components have a single MIL-STD-1553 interface, through which they are connected to the on-board computer and ground-based testing device.

Known multi-level automated information-measuring resource management system according to the patent for utility model No. RU 121604, which has a four-level structure. The first level includes primary measuring components that measure the set parameters, the second level includes measuring transducers used to receive measured information from the primary measuring components, followed by the transmission of data to third-level devices in digital form, the third level includes digital computers designed for storage, processing , analysis, generation of control commands for devices of the second and / or third level, or compression and transmission of data to the fourth level, made in the form of a server and / or an automated workstation of the operator with the function of the archive database server.

In the utility model, there are no components necessary for tests specific to spacecraft: on-board computer, telemetry system.

A well-known automated control system for power units of spacecraft according to the invention patent No. RU 2402799, which contains a mobile console for the test manager, a control unit, a general command issuing unit, a first communication path selection unit, a second communication path selection unit, a display unit, an operator directive formation unit in manual mode, the unit for input and analysis of the correctness of operator directives, the unit for inputting service signals, the unit for registering the main test protocol, the first unit for monitoring the body a second housing control unit, an analog parameter measurement unit, an analog information normalization unit, a control key, a process command issuing unit, a communication unit with an on-board computer system, discrete signal input and storage unit, a system power supply unit, protective operations unit, a galvanic isolation unit for operability control circuit of actuating elements, galvanic isolation unit for monitoring operability of pressure signaling circuits, diode separation unit, network system cross, operational control unit for control circuits.

The disadvantage is the lack of reliability due to the lack of redundancy elements.

Closest to the claimed is an automated test system for testing, electrical checks and preparations for launching spacecraft according to patent for invention No. RU 2245825, which contains a unit for bringing the automated test system into readiness for testing the spacecraft, control unit, interpretation directive unit, formation unit general purpose teams, a unit for selecting communication paths with a spacecraft, a unit for transmitting tolerance values of parameters, a protocol generation unit tests, the unit for monitoring the operability of the equipment, the display unit, the input and analysis unit for the directives of the automatic test program, the registration unit for the main test protocol, the unit for tolerance control of analog parameters, the unit for tolerance control of discrete parameters, the unit for forming the presence of a case, the unit for measuring analog parameters, a communication unit with an onboard telemetry system, a unit for issuing technological control commands, a communication unit with an onboard computer system, an input and storage unit states of discrete parameters, protective operations unit.

The disadvantages of this system are:

- lack of reliability, since in case of failure of one of the blocks, the full functioning of the system is violated,

- insufficient functionality, expressed in the absence of discrete signals (contact and non-contact), communication devices with test equipment of the test product via Ethernet, RS-422, RS-485 channels, the power source of the test product required for certain types of spacecraft.

Disclosure of invention

The aim of the invention is to expand the functionality of an automated test complex designed for electrical testing of spacecraft, with high reliability.

This goal is achieved by the fact that in an automated test complex for electrical testing of spacecraft, containing a manual control panel, a central control panel consisting of: test control unit, monitor, input devices (drives, keyboard, mouse, monitor), output device (printer) , a central computing machine comprising: a computing unit, a power bus control unit, a docking control unit, an analog signal input and normalization unit, a telemetry information reception unit for low-frequency channel, multiplex channel block, the main channel of the matrix command issuer, the main channel of the multiplex channel repeater, the device for receiving and processing discrete signals, the microsystem for measuring voltage and resistance in electric circuits, the following are introduced: standby central control panel, standby central computer , the backup channel of the matrix command issuing device, the backup channel of the repeater of the multiplex communication channel, the issuing device are discrete x contactless signals, which includes a communication unit with the test equipment of the tested product via Ethernet, RS-422, RS-485 channels, a device for issuing discrete contact signals, a device for receiving and processing telemetric information, a power source for the tested product, in the central computing the machine was introduced a unit for checking the flow around the squib circuits, an Ethernet switch, and communications between the units of the complex are redundant.

Introduction to the automated complex of a device for issuing discrete contactless signals, which includes a communication unit with the test equipment of the test product via Ethernet, RS-422, RS-485 channels, a device for issuing discrete contact signals, a device for receiving and processing telemetric information, a power source of the tested product, as well as the introduction of a block for checking the flow around the chains of the squibs into the computer, increases the functionality of the AIC. Moreover, a number of redundant devices have also been introduced: a redundant central control panel, a redundant central computer, a redundant channel for issuing matrix commands, a redundant channel for a repeater of a multiplex communication channel, as well as redundant communications between the units of the complex, which ensures increased reliability of the complex, as it allows continue testing the spacecraft in case of failure of the main (redundant) AIC units. This significantly increases the life of the complex.

Thus, the devices additionally introduced into the automated test complex are essential features of the invention and, in combination, make it possible to achieve the goal. The proposed technical solution of an automated test complex allows you to expand the functionality by increasing the number and range of output signals and to ensure high reliability of the entire complex due to the introduction of significant features in the form of additional devices, connections between the blocks of the complex and the use of redundancy elements.

Description of drawings

In FIG. 1 is a structural diagram of an automated test complex containing the following blocks:

1 - manual control panel (PRU);

2 - central control panel: CPU-O main (2-o) and CPU-R standby (2-r);

3 - central computer: TsVM-O main (3-o) and TsVM-R standby (3-r);

4 - device issuing matrix commands (VDMK), the main and backup channels;

5 - repeater of the multiplex communication channel (PC MCO) the main and backup channels;

6 - a device for receiving and processing discrete signals (GVA);

7 - a microsystem for measuring voltage and resistance in electrical circuits (14N401MM-01);

8 - a device for issuing discrete contactless signals (VDI-B), which includes a communication unit with the test equipment of the tested product via Ethernet, RS-422, RS-485;

9 - a device for issuing discrete contact signals (VDI-K);

10 - device for receiving and processing telemetric information (POTI);

11 - power supply of the tested product (IPSHM - power supply bus M).

In FIG. 2 is a structural diagram of a central control panel comprising: a test control unit 12, a monitor 13, input devices: a keyboard 14, a mouse 15, drives 16, 17, an output device: a printer 18.

In FIG. 3 is a structural diagram of a central computing machine comprising: a computing unit 19, a power bus control unit 20 (KShP), a docking control unit 21 (KST), an analog signal input and normalization unit 22 (AB), a telemetry information receiving unit via a low-frequency channel 23 (TMI NP-LF), the unit of the multiplex exchange channel 24 (MCO), the unit for checking the flow around the pyro cartridge 25 (POTSPP).

The execution of the invention

An automated test complex (abbreviated as AIK) for electrical testing of spacecraft contains a manual control panel 1, a main 2-o and a reserve 2-p central control panels consisting of: a test control unit, a monitor, input devices (drives, keyboard, mouse, monitor) , an output device (printer), the main 3-o and backup 3-p central computers, consisting of: a computing unit, a power bus control unit, a docking control unit, an analog signal input and normalization unit, a tel reception unit low frequency channel information, multiplex channel block, squib circuit flow checker, Ethernet switch, primary and backup channels of matrix command issuing device 4, primary and backup channels of multiplex communication channel repeater 5, device for receiving and processing discrete signals 6, microsystem for measuring voltage and resistance in electrical circuits 7, a device for issuing discrete contactless signals 8, which includes a communication unit with a test and verification unit paratura of the test product via Ethernet, RS-422, RS-485 channels, a device for issuing discrete contact signals 9, a device for receiving and processing telemetric information 10, a power supply for the test product 11, the communication between the blocks of the complex are redundant, the manual control panel of the first bidirectional output is connected to bidirectional inputs for switching on the main and backup central control panels, the second bi-directional output - with bidirectional inputs for turning on the main and backup central computing devices in other words, with a third bi-directional output — with a bi-directional input for turning on the power source of the test product, a fourth output — with an input for turning on the automated test complex, the main central control panel is connected with the first bi-directional output to the first bi-directional output of the main central computer, and the second bi-directional output - to the second bi-directional output standby central computer, standby central control panel connected by the first bidirectional terminal output with the first bi-directional output of the backup central computer, the second bi-directional output - with the second bi-directional output of the main central computer, power bus control inputs, docking control inputs, analog inputs, telemetry information reception inputs on the low-frequency channel of the main and backup computers to the product under test, the third bi-directional conclusions of the main and standby central computers are connected to the second and second bi-directional outputs of the device for receiving and processing discrete signals, respectively, the inputs of which are designed to connect to the tested product, the fourth bi-directional outputs of the main and backup central computers are connected to the first and second bi-directional outputs of the device for issuing discrete contactless signals, respectively, the bi-directional outputs of Ethernet, RS -422, the RS-485 of which is intended for communication with the test equipment of the tested product, and the outputs are for To test the product under test, the fifth bi-directional terminals of the main and standby central computers are connected to the first and second bi-directional terminals of the discrete contact signal issuing device, respectively, the outputs of which are designed to connect to the test product, the sixth bi-directional terminals of the main and standby central computers are connected to the first and the second bi-directional terminals of the device for receiving and processing telemetric information, respectively, the outputs of which They are designed to be connected to the tested product, the seventh duplicated bidirectional outputs of the main and standby central computers are connected to the first and second bidirectional conclusions of the main and standby repeater channels of the multiplex communication channel, respectively, the inputs of which are connected to the first output of the power source of the tested product, and the outputs are intended for connections to the tested product, the eighth duplicated bidirectional conclusions of the main and reserve central you the computer are connected to the first and second bi-directional outputs of the main and backup channels of the matrix command issuing device, respectively, the outputs of which are intended to be connected to the tested product, the second output of the power supply of the tested product is connected to the input of the matrix command issuing device, and the third output is designed to connect to the test product.

The remote control 1 is designed to perform the following functions:

- enable / disable AIC, the power source of the test product 11,

- switching the digital computer 3 from the primary to the backup and vice versa,

- indication of mains voltages and the state of on / off devices,

- indication of the state of the tested product,

- transfer to the CPU 2 a time stamp from the tested product (comes from the device for receiving and processing telemetric information - POTI - 10).

The central control panel (Fig. 2) contains a test control unit 12, implemented on an industrial electronic computer with a discrete signal input / output device for communication with a manual control panel (PRU 1), a central computing machine 3. Contains a monitor 13, a keyboard 14, “mouse” manipulator 15. A laser drive 16 (DVD - CD / RW) and a floppy disk drive 17 (1.44 FDD 3,5 ″) were introduced into the CPU to enter system software and test programs. The output of information is provided by the printer 18. The software and test reports are stored on the hard disk. The communication of the CPU 2 with the digital computer 3 is via fiber optic duplicated Ethernet channel. The length of the communication line is up to 3000 m.

The central control panel 2 performs the following functions:

- storage of system and test software,

- downloading software to the AIC devices,

- programming, debugging and execution of test programs,

- preparation, storage and printing of test reports,

- testing of AIC devices.

The backup CPU-R is located in the loaded reserve in relation to the main CPU-O. The intermediate test results are periodically rewritten from CPU-O to CPU-R, which makes it possible to continue testing in case of failure of the main console and switching to the backup one.

Central computing machine 3 (Fig. 3) is a multifunctional device that contains an industrial electronic computer with input / output devices that implement a computing unit 19, a power bus control unit 20, a docking control unit 21, an analog signal input and normalization unit 22, a block for receiving telemetric information 23 (on a low-frequency channel), a block for checking the flow around the circuits of the squibs 24, a block for a multiplex exchange channel 25.

The backup TsVM-R is in an unloaded reserve in relation to the main TsVM-O.

The digital blocks provide the following functions:

- power supply bus control unit 20 (KShP) - cyclic control of voltage value, insulation resistance and absence of short circuit to the housing for five DC voltage sources 30 V through 25 measuring channels,

- docking control unit 21 (CCT) - control of connecting the cable network connectors of the tested product through 96 channels,

- input and normalization blocks of analog signals 22 (AB) - voltage measurement of on-board DC sensors on 44 channels,

- telemetry information receiving unit 23 (TMI NP-LF) - receiving telemetry information in the direct transmission mode on a low-frequency channel with a serial code with an information transfer rate of up to 256 Kbps,

- block of the multiplex exchange channel 25 (MCO) - the formation of a redundant trunk of the multiplex exchange channel according to GOST P 52070-2003 (MIL-STD-1553B). The output of the MCO unit is connected by duplicated communication lines to the repeater of the multiplex exchange channel - PC MCO - 5,

- a unit for checking the flow around the pyro cartridge chains 24 (POCPP) - control of the resistance of the pyro cartridge chains of the tested product when the reference current is supplied.

The digital computer includes a 26 Ethernet switch, to which signals from CPU 2 are received and transmitted to other devices of the complex (VDS 6, VDI-B 8, VDI-K 9, POTI 10) via a duplicated twisted-pair wire.

The device for issuing matrix commands 4 gives the tested command codes KM, 20 toggle switch and 20 button commands in the form of non-energized relay contacts to the test product through duplicated channels, and also controls the connection of the supply voltage to the tested product in the power supply of the M bus - IPShM - 11. The device issuing matrix commands - VDMK - is controlled by commands from the digital computer 3.

The repeater of the multiplex exchange channel 5 (PC MCO) is designed to restore the shape and amplitude of the signals of the MANCHESTER-2 code in the data transmission line via the serial serial interface, made in accordance with the requirements of GOST P 52070-2003 (MIL-STD-1553 V). PC MCO provides communication with the MCO trunk bus of the on-board computer system (BWS) of the tested product via duplicated lines at a distance of up to 100 m between the receiver and transmitter. The repeater of the multiplex exchange channel 5 (PC MCO) is connected to the unit of the multiplex exchange channel 25 (MCO) located in the digital computer 3.

Discrete signal input device 6 (GVA) receives galvanically isolated impulse and on-off contact and contactless signals (DV) from the tested product, identifies changes in the received information with reference to these changes to the time of reading and transmitting channel information to the CPU 2 device through an Ethernet switch, located in the computer 3. GVA is controlled by commands from the CPU 2.

The microsystem for measuring voltage and resistance in electrical circuits 7 provides measurement and tolerance control of constant voltages across 510 switched circuits in the range from 0.1 to 36 V and resistances in the range from 0.1 Ohm to 20 MOm with automatic compensation of internal resistances. Microsystem software provides preparation and execution of test programs, printing results.

The device for issuing discrete contactless signals 8 (VDI-B) is designed to issue a parallel digital code to the test product by contactless signals (DVvB) through transistor opto-relays, providing galvanic isolation of all output signals. The structure of the VDI-B also includes a communication unit with the test equipment of the tested product via Ethernet, RS-422, RS-485 channels. VDI-B is controlled by commands from the CPU 2 through an Ethernet switch located in the digital computer 3.

The device for issuing discrete contact signals 9 (VDI-K) is designed to output contact signals (DVVK) in the form of non-powered change-over contact groups (such as "dry contact"). The device for issuing discrete contact signals - VDI-K - is controlled by commands from the CPU 2 through an Ethernet switch located in the digital computer 3.

The device for receiving and processing telemetric information 10 (POTI) is designed to receive serial pulse telemetry codes from the tested product, to issue a serial pulse code of the address of the requested parameter to the product, as well as to receive a serial code of the trace mark from the product, and to receive one-hertz time signals. To increase the reliability of POTI 10 contains duplicated transceivers. POTI 10 is controlled by commands from the CPU 2 through an Ethernet switch located in the digital computer 3.

The power source of the test product 11 (IPSHM) is designed to supply a constant voltage of 30 V to the test product and power the equipment in devices: issuing matrix commands VDMK and repeater of the multiplex communication channel PC MCO.

The automated test facility is running the QNX multitasking real-time operating system. AIC software also contains the necessary system programs, special software designed for the preparation and execution of test programs, and test software.

Work description

Automated test complex - AIC - operates as follows.

The formation of the working configuration of the AIC

The choice of a working digital computer 3 is made by the switches on the switchgear 1 and the power on switches of the main and backup devices when the AIC is turned on. Duplicated channels VDMK 4, PC MCO 5, duplicated transceivers POTI 10 and duplicated communication lines via Ethernet channel work in a loaded reserve. Changing the operating configuration of the AIC is made in the event of a malfunction of the digital computer 3 by switches on the switchgear 1 and the power-on switches on the digital computer. Reservation of the input and output signals of the AIC can be performed by combining them.

Enable AIK

The automated test complex is switched on by a switch to the switchgear 1. The signal AIK on goes to the power sources of the AIK devices and turns them on. IPShM 11 is included separately; during testing, it can be turned on and off by the operator. After turning on the AIC, the operator with CPU 2 loads the operating system. In this case, the system polls the AIC devices and determines which of them are turned on. With full completeness of AIC, elements of the operating system and drivers are loaded into the devices included in it. After that, the CPU execution system is loaded from the CPU 2. AIK is ready to go.

Test product test

The operator from the working CPU downloads the test program and starts its execution in continuous or step mode under the control of the test program execution system, which analyzes the instructions of the test language that make up the test program and generates directives in the corresponding devices. After the received directives of the device are executed, confirmation of their execution and the results are issued to the CPU. In the hard magnetic disk of the CPU test control unit, intermediate results are stored and a test report is generated. Results and protocol are displayed in real time on the monitor screen.

The obtained test report is printed on the printing device of the working CPU.

Preparing and debugging test programs

Preparation and debugging of test programs is performed on the CPU or on a stand-alone data preparation device (personal electronic computer) - in FIG. 1 not shown. Ready-made programs are recorded on a DVD-CD / RW laser drive and can be transferred to different AICs.

AIK Self Test

AIK self-testing is performed before the operator connects the tested product from both CPUs (primary and backup). Self-testing can be shortened or full.

Reduced self-testing is performed without connecting additional cables and units. At the same time, internal circuits of AIC devices and the connections between them are tested.

With a complete self-test of the AIC, the output signals are sent to the corresponding inputs of the devices using test cables. To test the analog inputs, the power sources included in the measuring AIC kit are used.

Shutdown AIK

To turn off the AIC, the operator from the working CPU 2 completes the test program, closes the test program execution system and completes the operation of the operating system. After that, the switch on the switchgear 1 turns off the power sources of the AIC devices.

Claims (1)

An automated test complex for electrical testing of spacecraft, containing a manual control panel, a central control panel consisting of: a test control unit, a monitor, input devices (disk drives, keyboard, mouse, monitor), an output device (printer), a central computing machine consisting of: computing unit, power bus control unit, docking control unit, analog signal input and normalization unit, low-frequency channel telemetry information receiving unit, multiplex unit a clear exchange channel, the main channel of the device for issuing matrix commands, the main channel of the repeater of the multiplex exchange channel, a device for receiving and processing discrete signals, a microsystem for measuring voltage and resistance in electrical circuits, characterized in that it contains a backup central control panel, a backup central computer, redundant channel of the device for issuing matrix commands, redundant channel of the repeater of the multiplex exchange channel, device for issuing discrete contactless systems signals, which includes a communication unit with the test equipment of the test product via Ethernet, RS-422, RS-485 channels, a device for issuing discrete contact signals, a device for receiving and processing telemetric information, a power source for the tested product, while in the central computing a machine was introduced to check the flow around the igniter circuits, an Ethernet switch, in addition, the connections between the complex units are redundant, the manual control panel of the first bidirectional output is connected to bidirectional inputs to turn on the main and backup central control panel, the second bi-directional output - with bi-directional inputs to turn on the main and backup central computer, the third bi-directional output - with bi-directional input to turn on the power source of the tested product, the fourth output - with the input to turn on the automated test complex, the main central panel the control is connected by the first bi-directional terminal to the first bi-directional terminal of the main central computing machine, the second bi-directional output to the second bi-directional output of the backup central computing machine, the backup central control panel is connected by the first bi-directional output to the first bi-directional output of the backup central computer, the second bi-directional output and the second bi-directional output of the main central computer, power bus control inputs , docking control, analog inputs, telemetry information inputs on the low-frequency channel and the backup computers are designed to connect to the tested product, the third bidirectional outputs of the main and backup central computers are connected to the first and second bidirectional outputs of the device for receiving and processing discrete signals, respectively, the inputs of which are designed to connect to the product being tested, the fourth bidirectional outputs of the main and a backup central computer connected to the first and second bi-directional terminals of the disk issuing device contactless signals, respectively, the bi-directional conclusions of Ethernet, RS-422, RS-485 of which are intended for communication with control and testing equipment of the tested product, and the outputs - for connection to the tested product, the fifth bi-directional conclusions of the main and backup central computers are connected to the first and the second bi-directional terminals of the device for issuing discrete contact signals, respectively, the outputs of which are designed to connect to the tested product, the sixth bi-directional conclusions about the new and backup central computing machines are connected to the first and second bi-directional terminals of the telemetry information receiving and processing device, the outputs of which are designed to connect to the tested product, the seventh duplicated bi-directional terminals of the main and backup central computing machines are connected to the first and second bi-directional terminals of the main and backup repeater channels of the multiplex communication channel, respectively, whose inputs are connected to the first the output of the power source of the tested product, and the outputs are designed to connect to the tested product, the eighth duplicated bidirectional outputs of the main and backup central computing machines are connected to the first and second bi-directional outputs of the main and backup channels of the matrix command issuing device, respectively, the outputs of which are designed to connect to the tested product , the second output of the power source of the test product is connected to the input of the matrix command issuing device, and a third output is intended for connection to the test product.

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