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Electric control system of force actuator in large astronomic telescope

A technology of astronomical telescopes and force actuators, applied in telescopes, storage systems, instruments, etc., can solve the problems of deformation control and displacement control of sub-mirrors that have not yet been designed, and achieve the effect of increasing mirror deformation

Inactive Publication Date: 2003-11-26
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the control system in the prior art realizes the control of the displacement of the sub-mirror, or the control of the deformation of the sub-mirror, but has not yet designed a control system that simultaneously completes the deformation control and displacement control of the sub-mirror.

Method used

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  • Electric control system of force actuator in large astronomic telescope
  • Electric control system of force actuator in large astronomic telescope
  • Electric control system of force actuator in large astronomic telescope

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Experimental program
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Embodiment 1

[0009] Embodiment 1, with reference to figure 1 , Figure 2: LAMOST astronomical telescope corrected by Schmidt

[0010] DETAILED DESCRIPTION Plate M A and the spherical primary mirror M B composition. m A It is made of 24 thin mirror hexagonal sub-mirrors with a thickness of 25mm; M B It is composed of 37 hexagonal sub-mirrors spliced ​​separately. The system obtains control parameters through the local area network to change M in real time. A The aspheric surface shape of the sub-mirror. When the telescope is running, such that M A During the entire observation process, the computer performs real-time control to change the shape of the aspheric surface. A force actuator and a displacement actuator are placed on the back of the sub-mirror, and the control motor used by the force actuator is a Swiss stepping motor. Its main technical indicators are: number of phases 4, distribution mode 2-2, step angle 15°, winding resistance of each phase 120Ω, excitation mode is self...

Embodiment 2

[0011] Embodiment 2 is basically the same as Embodiment 1, but the interface board is replaced by PC104 bus box to reduce the installation size. A control box composed of a bus system including a CPU, including a processor, an electronic disk, a digital interface, an A / D interface, a D / A interface, a communication interface and an actuator controller. On the back of the sub-mirror with a very limited area, the construction space is greatly limited. Using the control box can reduce the volume of the controller and the number of wiring, and improve the feasibility of actual engineering construction. For larger telescopes, LAN transmission or wireless transmission between the control system and each controller can also be realized. The communication of this system adopts the method of safety control word and automatic identity authentication. The processor in the intelligent control box automatically analyzes the data and judges the correctness of the order, thereby improving the...

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Abstract

An electric control system of force actuators in large astronomical telescope is disclosed. The mirror is composed of several sub-mirrors. Behind each sub-mirror there are a force actuator and a force sensor connected to computer. The said control system is composed of active optical controller, several general-purpose digital interfaces, user interface controller; force actuator controllers and force actuators, all of which are sequentially connected. Its advantage is the synchronous operations of actuators under the control of computer.

Description

technical field [0001] The invention relates to a control mechanism of an astronomical telescope, in particular to an electric control system of a force actuator in a large astronomical telescope. Background technique [0002] The larger the aperture of the astronomical telescope, the more celestial body information can be obtained. Therefore, building a huge astronomical telescope has always been the goal pursued by astronomers. However, as the aperture of the telescope increases, the difficulty of construction will increase exponentially. so that it cannot be built. The prior art adopts splicing large-scale telescope technology to solve this contradiction, that is, a complete splicing mirror is spliced ​​by several "sub-mirrors" of hexagonal thin mirrors. In order to meet the needs of astronomical observation, in real-time observation, the entire mirror surface needs to be deformed at any time. The specific method is: each sub-mirror has three support points; , so that t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/02G02B26/08G06F3/00G06F9/00
Inventor 张振超
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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