Control method for large caliber astronomical arcs movement

An astronomical telescope and arc motion technology, which is applied in the control field of large-diameter astronomical telescopes to achieve the effect of reducing errors

Inactive Publication Date: 2008-05-21
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these control technologies and control devices have not been adopted in existing astronomical telescopes.

Method used

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  • Control method for large caliber astronomical arcs movement
  • Control method for large caliber astronomical arcs movement
  • Control method for large caliber astronomical arcs movement

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] As shown in Figure 1, a large-aperture astronomical telescope arc motion control system. The control method of the system includes: outputting control parameters and setting the servo operation mode to the lower computer system through the upper computer, and performing online centralized monitoring, comprehensive management and Performance testing: Through the control program of the lower computer system, the control instructions of the upper computer are realized to complete the corresponding control algorithm, and the arc motion of the motor is controlled in real time. Set up the DSP module in the lower computer system, set up the central processing unit (CPU), SCI module, SPI module, A / D sampling module, position code input interface, pin interrupt module and PWM generator in the DSP module.

[0043]Figure 2 shows the relationship between all input and output data required by the control system. The "speed", "DC voltage" and "given value" of the analog quantity are cont...

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Abstract

The present invention relates to the control method of the arc motion of a large caliber astronomical telescope. The method comprises steps as follows: a DSP module is arranged in a hypogynous computer system; the control program of the hypogynous computer system comprises steps as follows: 1. the initial value of a control register in the DSP module is set; the current and the voltage at a motor stator end is measured and the DSP module is initialized; 2. an A/D is collected and kept; a direct torque control algorithm program is processed and a corresponding PWM signal is generated; 3. novel data collection and refreshing is finished and a voltage vector is reselected; 4. data exchange is carried out, which mainly comprises the steps of receiving from a host computer, refreshing the servo control parameter of a local host and setting the servo operation mode; the parameter in an EEPROM is saved; the keyboard value of the DSP module is read and displayed. The system can satisfy the requirements of long time, high precision tracking and observing various celestial bodies for the large caliber astronomical telescope. The present invention also satisfies the requirements of precision and wide speed control for astronomical observation.

Description

Technical field [0001] The invention relates to a control method of an astronomical telescope, in particular to a control method of a large-caliber astronomical telescope that performs arc motion. Background technique [0002] The mechanical motion of the astronomical telescope during observation is a tracking motion of the observing celestial body. It is actually a compensatory motion for the rotation of the earth, so the average speed of this motion is 360° / 24 hours (very slow). Moreover, the motion amplitude (or called the motion distance) required for each observation of all astronomical telescopes generally does not exceed a 180° arc. In other words, the motion of the astronomical telescope during observation is a very slow arc motion limited within an arc. The traditional astronomical telescope's tracking electromechanical structure mode adopts the conversion of rotating motion-arc motion. That is, the high-speed rotating motion of the motor is converted into a very slow ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B23/00G05B19/418G05B19/042
CPCY02P90/02
Inventor 胡伟张振超汪达兴朱震莲李颖任长志
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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