RU2656265C1 - Stepdown meter of linear and angular velocities - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to the measuring technology and instrumentation, namely to instruments for determining the navigational parameters of controlled moving objects. For this, the strapdown meter of linear and angular velocities contains: four secondary power supplies (SPS) connected by outputs, respectively, with power inputs of four angular velocity meters (AVM), four linear acceleration meters (LAM) and two electronic calculators (EC), according to the invention, two SPSs for ECs are introduced, the output of the first SPS is connected to the input of the first EC, the output of the second SPS is connected to the input of the second EC, the redundant power switch, connected by its outputs to the inputs of all SPS and the inputs of all LAM, the outputs of all AVM and the LAM are connected to the corresponding inputs of the first and second EC via independent communication lines.

EFFECT: higher reliability.

1 cl, 1 dwg

Description

The invention relates to the field of measurement technology and instrumentation, and in particular to devices for determining the navigation parameters of controlled moving objects.

The analogue is known, “Block of measuring angular velocity BIUS-040” developed by NPP Antares, Russia [1, 2], which is a four-axis (with non-orthogonal arrangement of sensitivity axes) fault-tolerant system for measuring projections of absolute angular velocity and linear acceleration of an object on the instrument axis coordinate systems.

Sensors based on dry pendulum accelerometers, with a suspension based on quartz glass and a capacitive angle sensor are used as linear acceleration meters.

The system is operable when one failure occurs in any of the subsystems of the same name (measuring angular velocity, linear acceleration, service electronics) and contains duplicated service electronics.

The closest technical solution to the declared one is “KIND34-059 Platform-free measuring unit” developed by the TsENKI branch of the Scientific Research Institute of Applied Mechanics named after Academician V.I. Kuznetsova »Russia [3], selected for the prototype.

The prototype includes eight internal measuring channels that do not have internal redundancy and are not interconnected: four gyroscopic channels (GC), which use an angular velocity sensor (TLS) based on a fiber-optic gyroscope (FOG), and four accelerometric channels (AK) ; two exchange and control modules (MOU1 and MOU2) with a special computer included in each of them; four reference generators; four secondary power supplies. Sensors of pendulum-type accelerometers with a suspension based on quartz glass and a capacitive angle sensor are used as linear acceleration meters. All eight sensitive elements (SE) are installed on a common basis and form a block of SE. The device includes: a redundant temperature control system and a system of vibration-shock protection (depreciation) of the CE unit.

The disadvantages of the prototype are the combination of the electronics of each pair of sensitive elements (TLS and the accelerometer) and the presence of a common secondary power source, which significantly reduces the reliability of the device as a whole, as well as the use of a temperature control system, which leads to a significant increase in energy consumption.

A significant drawback of the analogue and prototype is the use in them of the element base of imported production.

The objective of the proposed technical solution is to increase reliability and reduce energy consumption. In addition, the device should be made on modern domestic element base and materials.

The claimed technical result is achieved by the fact that in a strapdown linear and angular velocity meter (BILUS), comprising: four secondary power sources (VIP) connected by outputs, respectively, to the power inputs of four angular velocity meters (IMS), four linear acceleration meters (ILU ) and two electronic computers (EM), according to the invention, two VIPs for EVs are introduced, while the output of the first VIPs is connected to the input of the first EVs, the output of the second VIPs is connected to the input of the second EVs, a redundant power switch (SK), outputs connected to the inputs of all the VIPs and the inputs of all the ILU, the outputs of all the ICS and ILU are connected to the corresponding inputs of the first and second EVs through independent communication lines.

The drawing shows a structural diagram of a strapdown meter linear and angular velocities.

BILUS is designed to determine the navigation parameters of controlled moving objects, contains:

1, 2, 3, 4 - secondary power sources of ICS;

5, 6, 7, 8 - angular velocity meters;

9, 10 - electronic computers;

11, 12, 13, 14 - linear acceleration meters;

15, 16 - secondary power sources of EV;

17 - redundant power switch.

The outputs of the four ICS are connected to the inputs of the first and second EV. The outputs of the four ILU are connected, respectively, with the inputs of the first and second EV. The outputs of the redundant SC are connected, respectively, with the inputs of the ILU and with the inputs of all VIPs. The outputs of the four VIP are connected, respectively, with the inputs of the four IMS. The outputs of the first and second VIP for EV are connected to the input of the first EV and the input of the second EV, respectively.

Initialization of the BILUS operation is carried out by supplying power to it and issuing an external command from the consumer to the redundant SC that sets the required configuration of the ICS and the ILU. The redundant SC supplies power to the appropriate ILU and IMS configurations via the VIP. IMS and ILU measure, respectively, angular velocities, linear accelerations and transmit the measurement results simultaneously to the first and second EV.

In EV, information is accumulated and processed. Upon receipt of the polling command in the EV, the following information is calculated:

- about the projections of the absolute angular velocity vector of the product on the sensitivity axis of the ICS and the axis of the instrument coordinate system;

- about the increments of the projection integrals of the vector of the absolute angular velocity of the product on the sensitivity axis of the VOG and the axis of the instrument coordinate system;

- about the projections of the linear acceleration vector at the installation site on the sensitivity axis of the accelerometers and the axis of the instrument coordinate system;

- about the increments of the projection integrals of the linear acceleration vector at the installation site on the sensitivity axis of the accelerometers and the axis of the instrument coordinate system;

- about the components of the quaternion increment of the angular position from the moment of inclusion;

- about the points in time at which the information is generated.

In this case, each meter transmits the values of the natural frequency in parallel to each EV, which process the received information and give the final result to the consumer.

In BILUS, the ILU is used, consisting of the SE accelerometer and its electronic accelerometer transducer.

Thus, a strap-on linear and angular velocity meter is declared, comprising: four VIPs connected by outputs, respectively, with power inputs of four ICS, four ILU and two EVs. A distinctive feature of the device lies in the fact that two VIPs for EVs are introduced, while the output of the first VIPS is connected to the input of the first EV, the output of the second VIPS is connected to the input of the second EV, redundant SC, the outputs are connected to the inputs of all VIPS and the inputs of all ILUs, the outputs of all IMS and ILU are connected with the corresponding inputs of the first and second EV through independent communication lines.

The technical result is to increase reliability and reduce energy consumption.

Information sources

1. www.npp-antares.ru/equipment.html.

2. Fiber-optic gyroscope for space applications. Experience in the development, production and operation // Reports of the XX St. Petersburg International Conference on Integrated Navigation Systems, St. Petersburg, Russia, May 27-29, 2013.

3. V.M. Kutovoy, O.I. Maslova, S.Yu. Perepelkina, M.A. Chaptsova, M.V. Antonova, A.A. Ignatiev, E.Yu. Kovaleva, A.M. Kurbatov, L.Z. Novikov. The study of the characteristics of the strapdown inertial block based on fiber-optic gyroscopes in the process of ground mining. // Collection of materials of the XVIII St. Petersburg International Conference on Integrated Navigation Systems, St. Petersburg, Concern Central Research Institute Elektropribor OJSC, 2011.

Claims (1)

A strap-type linear and angular velocity meter, comprising: four secondary power sources (VIP), connected by outputs, respectively, to the power inputs of four angular velocity meters (IMS), four linear acceleration meters (ILU) and two electronic computers (EV), characterized in that two VIPs for EI are introduced, while the output of the first VIP is connected to the input of the first EV, the output of the second VIP is connected to the input of the second EV, a redundant power switch, the outputs are connected to the inputs of all the VIPs and the inputs of all ILUs, the outputs to These ICS and ILU are connected to the corresponding inputs of the first and second electronic devices through independent communication lines.

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