Control method for large caliber astronomical arcs movement
A technology for astronomical telescopes and control methods, applied in the field of control of astronomical telescopes, to achieve the effect of reducing errors
Inactive Publication Date: 2009-08-19
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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Problems solved by technology
However, these control technologies and control devices have not been adopted in existing astronomical telescopes.
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[0042] Such as figure 1 As shown, 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 command of the upper computer is realized to complete the corresponding control algorithm, and the arc motion of the motor is controlled in real time. A DSP module is set in the lower computer system, and a central processing unit (CPU), an SCI module, an SPI module, an A / D sampling module, a position code input interface, a pin interrupt module and a PWM generator are set in the DSP module.
[0043] Such as figure 2 Shown is the relationship of all input and output data required by the control system. The "speed", "DC voltage" and "set value" of the...
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The present invention relates to a kind of control method of arc movement of large aperture astronomical telescope, the method comprises: setting DSP module in the lower computer system, the lower computer system control program includes the following steps: 1. Setting the initial value of the control register in the DSP module , measure the current and voltage at the stator end of the motor, and initialize the DSP module; 2. Perform A / D data acquisition and retention, execute the direct torque control algorithm program, and generate corresponding PWM signals; 3. Complete new data acquisition, refresh, and reselect Voltage vector; 4. Data exchange, mainly including receiving and refreshing local servo control parameters from the host computer, setting servo operation mode; storing parameters in EEPROM, reading and displaying DSP module keyboard values. The system can meet the needs of large-aperture astronomical telescopes for long-term, high-precision tracking and observation of various celestial bodies, and meet the requirements of precision and wide speed regulation parameters 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-aperture astronomical telescope in arc motion. Background technique [0002] The mechanical movement of the astronomical telescope when making observations is a kind of viewing angle tracking movement for the observed celestial bodies, which is actually a compensatory movement for the earth's rotation, so the average speed of this kind of movement is 360° / 24 hours (very slow). Moreover, the range of movement (or called the distance of movement) required for each observation of all astronomical telescopes generally does not exceed an arc of 180°. That is to say, the motion of the astronomical telescope during observation is a very slow arc motion limited to an arc range. The traditional astronomical telescope tracking electromechanical structure mode all adopts the conversion of rotational motion-arc motion. That is to say, the high-spe...
Claims
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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