Astro-finder device

FIELD: astronautics, in particular, systems for astro-correction of launch azimuth of carrier rockets.

SUBSTANCE: claimed device is used for launch azimuth correction of position of gyro-stabilized platform of carrier rocket control system and contains optical objective and photo-sensitive section positioned on aforementioned platform. The platform consists of at least two photo-detectors with different spectral characteristics and a scanning element, made in form of piezo-element with rounded reflecting end. When scanning element oscillation is low, any beam after the objective is reflected from rounded surface and received on a single photo-detector. That moment depends on position of a star relatively to finder axis of objective and on sweep path. When sweep is stable, the moment of appearance of signal from photo-detector inside the sweep period is rigidly connected to position of aforementioned beam, and position of finder axis is fixed when device is positioned on gyro-stabilized platform. When two photo-detectors are used with different spectral characteristics, it becomes possible to correct position of gyro-stabilized platform on basis of two spectrally different navigational stars. It is possible to install the device directly on the gyro-stabilized platform of control system of carrier rocket and to precisely aim the rocket at active flight section after comparatively rough aiming based on launch azimuth during pre-launch preparation, which results in simplified and cheapened ground-based aiming system, and allows to remove errors in launch azimuth caused by time difference between launch of engine block of first step of rocket and its release from launching device.

EFFECT: reduced mass and size of astro-finder device, increased reliability of its operation.

2 dwg

 

The invention relates to space exploration, in particular, to systems astronomicly azimuth launch boosters.

The aim of the invention is to reduce the weight and size Ostrovityanova device (AVA) and the increase in reliability that would allow the ABA directly on gyrostabilization platform (GSP) management system booster and domiciliate a missile in boost phase of flight after a relatively coarse aiming in azimuth start during pre-training. This will also simplify and reduce the cost of ground system and aiming to eliminate fatal for any ground aiming error in the azimuth of the start associated with a gap in time between the start of the propulsion system of the first stage of the rocket and its separation from the launcher.

The invention consists in that the photosensitive part (FCC) AVA is performed on the basis of the scanning piezoelectric element and a single photodetector.

Analog is AVA using the holographic method design (see Mathematical modelling of processes and systems on a computer: Win, TSITSKA, 2003, http://svarka.susu..ru/library/study/mathmodel/index.html. - section 8, p.).

The prototype selected AVU CCD in the role of a sensor (see Mathematical modelling of processes and systems to e is M: Van, CIT SSGA, 2003, http://svarka.susu.ac.ru/library/study/mathmodel/index.html. - section 8, p.).

These design options AVA have several disadvantages, among which the first, the presence of mechanical moving parts, which reduces the reliability of the device, and secondly the need for constant temperature control device, which increases the weight and size and, thirdly, the complexity of processing a received image or video.

The difference of the proposed device from the prototype is performed FCC, which contains the scanning element and at least two of the photodetector (AF). The scanning element is designed in the form of a piezoelectric element, rounded reflecting part of which is used as amplifier offset of the reflected beam, which is a similar device is a lowercase two-axis scanner (see SU 1219995 And (Popov E, and others), 1986). In this case, when the small oscillation of the scanning element of any beam after the lens is reflected from a curved surface, gets to the OP at the time associated with the position of the axis of the lens relative to the direction to the star and the characteristics of the scanner. The scanning piezoelectric element based on its primary property to change the geometric dimensions under the action of tension.

AVA is constructed and operates as follows.

The image of a star 1 star field generates the I lens 2 (figure 1) and is directed to OP 3 (conditionally shows one AF). In the focal plane of the lens 2 is a scanning spherical reflecting surface 4, attached to the piezoelectric element 5. Scanning creates a secondary piezoelectric effect, which occurs under the action of two periodic variable voltage Uxand Uyapplied through the sheath to the piezoceramic element and the respective axes X and Y sweep.

In the sweep of the rays from a star 1, passed through the lens 2, in some moments fall to the inputs of the OP 3. These moments are associated with the position of the beam from the star relative to the axis of the lens and the scan trajectory. As the scan is stable (stable Uxand Uy), the time of occurrence of a signal from the AF within the period of the sweep is rigidly connected with the position of the beam relative to the sighting axis of the lens, and the axis position of the lens is fixed placement AVA to SSE.

Figure 2 explains the work of the ABA with respect to one plane, for example, passing through the sighting axis of the lens 2 and the X-axis (or Y) scan at different positions of the stars(1, 1', 1"). The graph explains the appearance of the signal Ufthe output of the photodetector 3. Here Upthe sweep voltage UF1UF2and UF3- pulse illumination of the photodetector with a corresponding position of the stars and the reflective surface of the piezoceramic element.

When used, in which lastnosti, two OP with different spectral characteristics (for example, in the blue and red parts of the spectrum), it is possible to adjust the position of SHGs in two navigational stars, and or simply to improve the accuracy of correction of the azimuth, or to adjust the position of SHGs on two axes, as well as to expand the number of possible navigation stars.

Astrovision device for correcting the position of the gyro-stabilized platform management system booster in azimuth start containing placed on the platform of the optical lens and the photosensitive part, characterized in that the photosensitive portion consists of at least two photodetectors with different spectral characteristics and the scanning element made in the form of a piezoelectric element with a rounded reflective end.



 

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