SU575573A1

SU575573A1 - Accelerometer

Info

Publication number: SU575573A1
Application number: SU7602372496A
Authority: SU
Inventors: Юрий Семенович Галкин; Геннадий Александрович Григорьев; Валерий Александрович Зорин; Михаил Георгиевич Каган; Анатолий Викторович Корягин; Геннадий Николаевич Писарев
Original assignee: Предприятие П/Я Г-4805
Priority date: 1976-06-10
Filing date: 1976-06-10
Publication date: 1977-10-05

Description

1one

Изобретение-относитс к области приборостроени , в частности к высокочувствительным линейным- акселерометрам с газодинамическим подвесом инерционной массы, и может быть использовано в системах наведени , управлени и телеизмерений ракетной и космической техники.The invention relates to the field of instrumentation, in particular to highly sensitive linear accelerometers with a gas dynamic suspension of inertial mass, and can be used in guidance, control and telemetry systems for rocket and space technology.

Известны акселерометры, содержащие взвешенную инерционную массу, катушки намагничивани и компенсации . Однако такие системы не могут быть использованы при подвесе инерционной массы во вращающейс жидкости.Accelerometers containing weighted inertial mass, magnetization coils and compensation are known. However, such systems cannot be used in the suspension of inertial mass in a rotating fluid.

Кроме того, известен акселерометр, содержащий инерционную массу, выполненную в виде втулки, расположенной на валу, при вращении которого образуетс газодинамический подщипник, систему дл поддержани стабильной скорости вращени вала, гибкую рить, один конец которой закреплен ка инер ционной массе, а другой - на неподвижном корпусе, служащую п зеобразователем газодинамического момента трени в осевую си преп тствующую перемещению инерционной массы под действием линейного ускорени , In addition, an accelerometer is known which contains an inertial mass made in the form of a sleeve located on a shaft, during rotation of which a gas-dynamic support is formed, a system for maintaining a stable shaft rotational speed, flexible tail, one end of which is fixed to an inertial mass, and the other end a fixed case that serves as a generator of the gas-dynamic moment of friction into an axial system preventing the movement of inertial mass under the action of linear acceleration,

и регистрирующее устройство .2. Недостатком устройства 5шл етс непосто нство его выходной характеристики, обусловленное нестабильностью параметров газовой опоры, а именно нестабильностью аэродинамического момента трени , под действием которого гибка неупруга нить нат гиваетс . Измениние аэродинамического момента трени обуславливаетс изменением зазора в газодинамическом подшипнике под действием старени или температурной деформации материалов опоры, а также изменением параметров газа как в зкости, так и давлени .and a recording device .2. The disadvantage of the device 5 is the inconsistency of its output characteristic, due to the instability of the parameters of the gas support, namely the instability of the aerodynamic moment of friction, under the action of which the inelastic thread is flexible. A change in the aerodynamic moment of friction is caused by a change in the gap in the gas-dynamic bearing under the action of aging or temperature deformation of the support materials, as well as by changing the parameters of the gas, both viscosity and pressure.

Цель изобретени - повышение точности выходной характеристики акселерометра за счет повыщени стабильности аэродинамического момента трени . Это достигаетс тем, что в акселерометр введен магнитоэлектрический датчик силы нат жени нити, подвижна часть которого соединена со вторым концом гибкой нити, в выход - со входом приводного стабилизирующего устройства .The purpose of the invention is to improve the accuracy of the output characteristics of the accelerometer by increasing the stability of the aerodynamic moment of friction. This is achieved by introducing a magnetoelectric sensor for tensioning the filament into the accelerometer, the movable part of which is connected to the second end of the flexible filament and to the output to the input of a driving stabilizing device.

Claims

The drawing shows a general scheme of the accelerometer. The accelerometer includes a housing 1. sensual element 2, made in the form of a sleeve and forming a gas-dynamic suspension with the shaft 3, an electric motor 4, a stabilizing device with an adder 5 for feeding the electric motor 4, a flexible inelastic filament 6, one end of which is fixed on the element 2 and the second end on the movable part 7 magnetoelectric force sensor. The latter consists of a stator of the angle sensor 8, the output of which is connected to the stator of the force sensor 9 by means of a feedback amplifier 10. The output of the amplifier 10 is connected to the accumulator of the stabilizing device 5. In addition, the accelerometer has a linear displacement sensor 11, and a recording device 12 When rotating the shaft 3 by the electric motor 4, the sensitive element 2 emerges in the gas layer of the gas-dynamic bearing. The moment of aerodynamic friction of the gas layer resulting from the rotation of the shaft 3 provides tension on the filament 6, with some force, which monitors with a magnetoelectric force sensor. An electric signal from the magnetoelectric sensor about the thread loading force is fed to the input of the device adder, 5, where it is compared with a reference signal corresponding to a specific thread tension force, and further stabilizing the tension force by changing the speed of rotation of the shaft 3 by the engine 4 When changing the parameters of the gas support of the gap, viscosity, gas pressure, as well as in the case of the action of cross acceleration, the tension of the thread tension is continuously stabilized by changing the rotational speed shaft 3, which ensures the invariance of the output characteristics of the accelerometer, rometer during its operation. An accelerometer comprising a housing, a sensing element in the form of a sleeve encompassing a shaft, a driving stabilizing device with an adder for rotating the shaft, a flexible thread connected by one conDOM to the sensitive element, a displacement sensor and a registering device differing from that increased accuracy, a magnetoelectric sensor was inserted into it, the movable part of which is connected to the second end of the flexible filament, and the output is connected to the input of the stabilizing drive device. Sources of information taken into account in the examination: 1. USSR author's certificate number 176726, cl. : SO1 P 15/08, 1965.

2. US patent number 3161064, cl. 73517, 1971.