CN101826659B - Active control method of main reflecting surface of 65-meter radio telescope - Google Patents
Active control method of main reflecting surface of 65-meter radio telescope Download PDFInfo
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Abstract
The invention relates to an active control method of the main reflecting surface of a 65-meter radio telescope. The invention is characterized in that the main surface is a combined main surface formed by splicing a plurality of subpanels, each subpanel is controlled by a plurality of actuators, and a control system respectively controls the actions of all the actuators, i.e. the main surface is divided into eight sectors, and the actuators in each sector are used as a control set; each control set is provided with a sector controller; initialization is carried out after starting up, and the actuator controllers await orders; a main controller analyzes control commands and sends control values of the actuators through a local area network, i.e. a 24-port fiber switch is respectively connected with the sector controllers and sends the commands; each sector carries out operation to obtain the magnitude of force to be applied to each actuator; the commands are sequentially sent to microcontrollers of each actuator; each actuator controller returns state information of execution after executing the commands; and a server of the sector controllers sends all the returned information to the main controller. The invention can meet the technical requirement on more complication and higher precision of the 65-meter radio telescope.
Description
Technical field
The present invention relates to a kind of control method, be specifically related to a kind of Active Control Method of 65 meter radio telescope primary reflection surfaces.The present invention is the grant of national natural science foundation key project, " heavy caliber active optics submillimeter wave/millimetric-wave telescope scheme and key technology research ", and approval number is: 10833004.
Background technology
Radio astronomy is the principle that is similar to radar, the astronomical observation means that grow up, but it just receives the radio wave of celestial body, and its main tool is radio astronomical telescope.The primary reflection surface of radio astronomical telescope is a paraboloidal antenna for radio astronomy, this primary reflection surface when receiving the radio signal of celestial body in order to focus on radio signal.In prior art, the primary reflection surface of antenna for radio astronomy is all to be fixedly mounted on backrest, can do orientation and elevating movement during the observation celestial body.But the parabolic shape of primary reflection surface itself is changeless.But along with the development of modern science and technology, radio astronomical telescope is made larger and larger, and the diameter of its primary reflection surface is also increasing.The primary reflection surface diameter of the Shanghai radio telescope of for example, developing reaches 65 meters.The astronomer is not content with traditional radio telescope, expand the application in the astronomical observation field; Must become passive panel and be the active panel; This is the new technology in radio telescope; It has proposed a new difficult problem to automation field.The displacement control of making large like this parabola primary reflection surface can run into a lot of difficulties, comprising the difficulty of the operation of control system.This larger, the requirement telescopic system that upgrades is controlled more complicated, and required precision is higher.Lack the answer that addresses these problems in prior art.
In the traditional optical astronomical observation technology near the field of radio astronomy, a kind of active optics astronomical telescope technology has appearred, and telescopical active control system, be the new technology of Modern Astronomical observation in other words.The appearance of this technology is the technical difficulty for the large-scale astronomical telescope that solves the construction super large caliber, and adopts the sub-mirror of polylith to be spliced into large-scale astronomical telescope; The sub-mirror of each in splicing construction is action simultaneously under control system is handled, and can form the deformation of whole minute surface, reaches the needs of astronomical observation, namely consists of the active optics astronomical telescope.The technological difficulties of the large-scale active optics astronomical telescope of this splicing construction are control system: it need to satisfy all sub-mirrors and receive simultaneously instruction, the specification requirement of action simultaneously, also include displacement action and deformation action in action, the factor quantity that needs to control is huge, also will satisfy simultaneously the control precision of milli newton level.The control system of large-scale astronomical telescope (TCS) is the system of a complexity, includes pointing of the telescope and tracking control system, force actuator control system, displacement actuator control system and dome control system etc.By force actuator control system and displacement actuator system, can overcome thin mirror surface spliced telescope minute surface error, telescopical picture element is improved, make the construction of large-scale astronomical telescope become possibility.Large sky area multi-object fiber spectroscopic telescope (hereinafter to be referred as LAMOST) is spliced into Schmidt corrector MA and 37 sub-mirrors of hexagon by 24 sub-mirrors of hexagon respectively and is spliced into primary mirror sphere MB and forms.Each piece mirror of MA and MB is controlled the minute surface displacement by three cover displacement actuators respectively, totally 183 covers.34 cover force actuators are housed, totally 816 covers under the every sub-mirror of MA.The sub-mirror of large-scale astronomical telescope can expand to thousands of, and simultaneously displacement is controlled and sub-mirror Deformation control concentrates in same control system and completes.Bring thus the quantity of control object to reach unprecedented huge degree, this has proposed great challenge to telescope control system.
Existing telescope control system all adopts Ethernet to control or total line traffic control, and in control system, the controlled cell number has several thousand even up to ten thousand, and Control System NetWork engineering difficulty is large, and especially the engineering wiring is more complicated in limited scope.All pass through wired connection between master controller and local control unit, and telescope will be done to point to and pursuit movement because following the tracks of celestial body, too many wiring has brought inconvenience to telescopical control and motion.
For example, the control method of the active optics electric-control system in the national big science engineering LAMOST telescope of China.LAMOST telescope active optics system adopts the power transducer as the feedback device that adds the closed-loop control of (drawing) power; The method of soft or hard combination is carried out the control thought of logical combination, and distribution centralized network control scheme is very successful a kind of new way of innovation.
This system has realized that every sub-mirror of MA controls 34 cover force actuators operations, totally 24 sub-mirrors 816 cover force actuators operations simultaneously.Accomplished that afterburning scope is ± 150N, computer has reached 5/10000ths to the closed-loop control precision of force actuator, root-mean-square value≤50mN.RMS≤30mN accounts for 98.367%, all is better than the technical indicator of force actuator.This system can be by the aspheric surface of 24 MA mirrors of the real-time control break of the controlled parameter of local area network (LAN).
By local area network (LAN) control simultaneously MA and MB primary mirror 816 cover force actuators and 183 cover displacement actuators totally 999 cover actuator real time executions satisfy the specification requirement of LAMOST telescope active optics control system fully; And control precision is far superior to all technical.
No. 200710026173.0 applications for a patent for invention of China, disclose a kind of control method for large astronomical telescope wireless LAN: control method for large astronomical telescope wireless LAN is comprised of master control system, local control system and wireless local area network (WLAN) system, it is characterized in that: described wireless local area network (WLAN) system adopts the 802.11a Internet protocol, and described WLAN (wireless local area network) and cable LAN framework adopt WAP (wireless access point) (AP) to add the network interface card form.
Summary of the invention
The Active Control Method that the purpose of this invention is to provide a kind of 65 meter radio telescope primary reflection surfaces, this Active Control Method can be completed the primary reflection surface of radio telescope passive type is become and be active primary reflection surface; Simultaneously, can satisfy 65 meter radio telescopes to the more complicated and more high-precision specification requirement of control system.
completing above goal of the invention scheme is, a kind of Active Control Method of 65 meter radio telescope primary reflection surfaces, it is characterized in that, the primary reflection surface of radio telescope, (be called for short: interarea) adopt the combined main reflecting surface that is spliced by some sub-panels, every sub-panel wherein is by some actuators, (displacement actuator) controlled, control system is controlled respectively the action of all actuators, pass through ACTIVE CONTROL, make the shape of the primary reflection surface that is spliced into meet the requirement that radio astronomy is observed, concrete control step is as follows
(1), the astronomical observation computer (or claims the master control computer to the main control computer of radio telescope primary reflection surface, or deserve to be called the bit machine system) issuing command, comprise start, shutdown and all calculating, the running of main control computer, all carry out under the instruction of astronomical observation computer;
(2), the interarea of 65 meter radio telescopes is divided into 8 sectors, all actuators (displacement actuator) in each sector are as a control group; Each control group arranges a sector controller;
(3), after main control computer start, at first carry out initialization, all actuator controllers are ready;
(4), according to the requirement of control system, main control computer is resolved control command, sends by local area network (LAN) the controlling value that this system respectively organizes actuator:
Main control computer is connected with 8 sector controllers respectively by 24 mouthfuls of optical fiber switch; And send instruction to each sector controller;
(5), the server of each sector controller receives the instruction of main control computer, and receives simultaneously the actuator data that obtain by detection system, when sending these data to main control computer, obtains the displacement of each actuator operation according to this data processing operation;
(6), the server of each sector controller adopts asynchronous Non-Blocking I/O to send instruction to the microcontroller (also referred to as intelligent controller) of each actuator (displacement actuator) successively; And simultaneously this command signal is sent to main control computer;
(7), between the server of main control computer and each sector controller, the both-way communication mode between the server of each sector controller and the microcontroller of each actuator is, AP adopts between PCF mode and LCU and communicates by letter;
(8), return to the state information of execution after each actuator controller fill order, give the server of sector controller;
(9), the return information of the server of sector controller after with all actuator controller fill orders sends to main control computer;
(10), this communication process finishes; The telescope state needs to change, or when changing, begins next communication process.
The present invention is in the field of radio astronomical telescope, uses for reference the technology of active optics in optics astronomical telescope field, a novel concept of proposition, active surface template radio astronomical telescope.
Radio telescope is different from the operational mode of optical telescope; Radio telescope is the radio wave of accepting celestial body; Its principal reflection panel is similar to a radar antenna; And optical telescope LAMOST observes at visible light wave range; Its principal reflection panel is similar to an optical lens.The interarea displacement accuracy of radio telescope is lower than the LAMOST optical telescope, but its stroke is greater than the LAMOST optical telescope; The actuator of its load capacity in the LAMOST telescope surpasses an order of magnitude; The quantity of its displacement actuator is also much larger than the LAMOST optical telescope.This is the problem that must think over according to the difference of object when the design control system.
More particularly, control method of the present invention is:
The topological structure of ACTIVE CONTROL 1104 cover displacement actuators
(1), interarea is divided into the topological structure of 8 sectors
The interarea of 65 meter radio telescopes is divided into 8 sectors, and as the interface of Fig. 3 and computer, actuator forms shown in system's control topology structure chart.
(2), the topological structure of a sector
The technical indicator of active panel actuator, as shown in table 1.1:
Table 1.1 65 meter radio telescope antennas are the design objective of panel actuator initiatively
Antenna interarea system is the abbreviation of antenna main reflector Board position active accommodation system.There is error owing to installing to wait, and large-scale antenna also will be subject to the impact of the factors such as gravity, temperature and wind, certainly exist error between the actual curved surface that during work, aerial panel forms and desirable curved surface, so for the efficient that improves Shanghai 65 meter radio telescope antenna surfaces the observed efficiency of high frequency band (particularly), the major function of antenna active panel system is exactly the variation according to aerial position in observation, aerial panel is carried out real-time adjustment, thereby guarantee the precision of required aerial panel.
Active panel system control scheme
1, the automatically controlled requirement of actuator
Move back and forth according to the instruction of control system, and have the position auto-lock function, to reduce the consumption of the energy.The key technical indexes of actuator is referring to table 1.1.
2, the major function of actuator microcontroller
(1), repetitive positioning accuracy＜0.015mm;
(2), closed loop control function: microcontroller can be realized local closed loop control function;
(3), communication function: microcontroller must carry out communication with the master control computer, and sends oneself state to the master control computer.
(4), initiatively panel is controlled function
A, can calculate in real time the compensation rate at each control point;
B, the microcontroller by bus and each actuator carry out communication;
C, can graphically show each control point state;
D, can carry out each actuator of manual adjustments by active surface panel control system main control computer;
E, can carry out data interaction with the antenna main control computer.
3, the Electro Magnetic Compatibility of active surface control system
Active surface control system and element thereof must reach GB/T17618-1998 Information Technology Equipment immunity limit and the requirement of method of measurement CISPR24 (97) B level.
4, actuator control system conceptual design
Control system of the present invention can be accomplished: 1104 cover displacement actuators have carried out detection and the demarcation after connection control system one by one.30 millimeters of the strokes of 1104 cover displacement actuators, repetitive positioning accuracy satisfy the specification requirement of 65 meter radio telescopes less than 15 μ.
Under outdoor natural environment, carry out life test, control actuator through switching on continuously and moved 2 months, not damaged, working properly.Control stroke: 30mm, repeatable accuracy is less than 3 μ.
The control of the displacement actuator in 65 meter radio telescopes, on technical indicator: stroke is 30mm; Resolution is 0.015mm.
5, the control structure of actuator
As shown in Figure 1, after supposing that having N intelligent controller to pass through K multiplex communication controller links, the order of accepting actuator master control controller realizes the real-time control of M displacement actuator.
6, actuator master control computer
Actuator master control computer is placed in the control room of 65 meter radio telescopes; Adopt Industrial Control Computer.Be connected with the computer of astronomical observation by this master controller, accept the order of the computer of astronomical observation, after resolving, the actuator controller is sent control command; Return to the state information of execution after actuator controller fill order, give actuator master control computer.
7, actuator controller
(1) intelligent controller
At present can be with reference to the structure of the intelligent controller in LAMOST telescope active optics system.
Intelligent controller is directly installed on telescopical truss; And three anti-processing have been adopted.The actuator control experiment of under lab doing in 65 meter radio telescopes is science.Improve afterwards by experiment, just can be arranged on the backrest of panel back of 65 meter radio telescopes.
1. the connected mode of actuator
The motor of displacement actuator is arranged in control box; Control box externally only has netting twine to connect by aviation plug with supply lines.(make in batches and adopt Ethernet+CAN bus structures, one group of CAN bus connects N platform actuator controller to computer by Ethernet; N=69 for example, namely 16 NET/CAN/ protocol conversion controllers just can be realized network service) control the actuator operation.
2. DC～DC power conversion connecting plate
It is that a very little plate is arranged in the actuator control box, and the DC power supply that power source is delivered to intelligent controller by cable connects on DC-DC, and then is transformed into the inner needed various DC power supply of actuator controller.
3. the circuit such as feedback andlogic control of actuator
The feedback of actuator adopts the encoder of 256 lines to be directly installed on the axle of stepping motor, and the counter of encoder adopts the forward-backward counter of 24.8 I/O have been designed as the spacing input of control step motor and actuator etc. on this circuit board.The design of this plate is directly on the plate that is inserted in Node Controller; Reduced the connection of line.Reliability and jamproof ability have been improved.
(2) structure of actuator controller
The embedded type CPU mainboard
Mainboard in the actuator intelligent controller: the PC104 master controller is embedded type CPU mainboard independently, and the RAM of 256M is arranged, and deposits start-up routine and intelligent control program with the CF card.Process as controlling, have RS232/485 communication and ethernet communication interface, can directly connect CRT, keyboard, mouse etc.Only use 485 communication interfaces to connect master controller as intelligent controller in the control of reality
Motor is arranged in control box, and actuator and controller are designed to integrated.So both facilitated on panel and installed, also strengthened jamproof ability, weakened simultaneously electromagnetism to external radiation.
Control method:
Displacement actuator is 1 actuator of each concurrent place's placement of every four panels, N displacement actuator altogether.
Governing equation:
Write as matrix form:
Use least square method, get equation:
A is the influence function of actuator; N=1104 overlaps displacement actuator.
Software for Design:
After the master computer start, at first carry out initialization, all actuator controllers are ready.Then according to the requirement of control system, computer is resolved control command as requested, sends to the controlling value of this one group of actuator of system by local area network (LAN).
The above has set forth communication and the control method of master controller and actuator controller.In like manner, actuator master control computer is by data and the order of NET/CAN/ protocol conversion controller send and receive N platform actuator controller.That is to say, the actuator master computer is controlled 1104 cover actuator real-time operations in real time.
The Active Control Method of 65 meter radio telescope primary reflection surfaces disclosed by the invention, used for reference the technology of large-scale optics astronomical telescope ACTIVE CONTROL, develop the brand new technical that radio astronomical telescope is controlled, Active Control Method of the present invention can satisfy 65 meter radio telescopes to the more complicated and more high-precision specification requirement of control system.
Can accomplish: 1104 cover actuators have carried out by detection and demarcation after the cover connection control system.Accomplish that by demarcation the range of operation of every suit actuator, precision all satisfy the specification requirement of 65 meter radio telescope projects.And be far superior to technical indicator.
Description of drawings
Fig. 1 is actuator control structure figure;
Fig. 2 is the main control computer FB(flow block);
Fig. 3 is the topology diagram that interarea is divided into 8 sectors;
Fig. 4 is that a sector actuator forms system topology figure;
Fig. 5 is network topology structure figure;
Fig. 6 is the host computer procedure block diagram;
Fig. 7 is the program of lower computer flow chart.
Embodiment
The Active Control Method of embodiment 1,65 meter radio telescope primary reflection surface:
(1), (be called for short: main control computer interarea) (or claim the master control computer, or deserve to be called the bit machine system) issuing command comprises start, shutdown and all calculating, the running of main control computer to the astronomical observation computer to the telescope primary reflection surface;
(2), the interarea of 65 meter radio telescopes is divided into 8 sectors, all actuators in each sector are as a control group; Each control group arranges a sector controller;
Adopt the optical-fibre communications mode, connect respectively 8 groups of control cabinets; Each control cabinet is controlled a sector.Actuator composition system topology figure as a sector of Fig. 4; Two Ethernets are arranged in a sector--the transducer of CAN bus is controlled 138 cover displacement actuator operations.Fig. 5 is the network topology structure figure that 1104 cover displacement actuators are controlled.
(3), after main control computer start, at first carry out initialization, all actuator controllers are ready;
(4), according to the requirement of control system, main control computer is resolved control command, sends by local area network (LAN) the controlling value that this system respectively organizes actuator:
Main control computer is connected with 8 sector controllers respectively by 24 mouthfuls of optical fiber switch; And send instruction to each sector controller;
(5), the server of each sector controller receives the instruction of main control computer, and receive simultaneously the actuator data that obtain by detection system, when sending these data to main control computer, obtain the size of the displacement that each actuator should add according to this data processing operation;
(6), the server of each sector controller adopts asynchronous Non-Blocking I/O to send instruction to the microcontroller (also referred to as intelligent controller) of each actuator (displacement actuator) successively; And simultaneously this command signal is sent to main control computer;
(7), between the server of main control computer and each sector controller, the both-way communication mode between the server of each sector controller and the microcontroller of each actuator is, AP adopts between PCF mode and LCU and communicates by letter;
(8), return to the state information of execution after each actuator controller fill order, give the server of sector controller;
(9), the return state information of the server of sector controller after with all actuator controller fill orders sends to main control computer;
(10), this communication process finishes; The telescope state needs to change, or when changing, begins next communication process.
Stepping motor
Table 5 stepping motor major parameter
| Motor model, producer | Customization |
| Operating temperature range | -25-+65℃ |
| Supply power voltage, electric current | 2.52V/2.8A |
| Power consumption during the single motor normal operation | 7.056W |
| Power consumption under the single motor battery saving mode | 3.5W |
| The moment of torsion of motor | Static torque 110N.CM |
| Motor often turns screw mandrel lifting amount | 0.3675 μ/step; 0.147mm/ turn |
| The stepping motor step angle | 1.8±5％°/STEP |
| Encoder line number | 256 (4 segmentations 1024) |
Controllor for step-by-step motor
Table 6 controllor for step-by-step motor parameter
| Model, producer | Customization/HIPROS converges emerging rich industry |
| Operating frequency | 100HZ-1KHZ is adjustable |
| The type of embedded OS, working method | Directly assembler language programming |
| The program downloading mode | CAN |
Illustrate that controllor for step-by-step motor embeds the fault-tolerant design of program, program safety design
Communication
1) with the interface of computer, topological structure and wiring diagram after 1104 actuator composition systems are seen Fig. 3, Fig. 5;
2) multichannel hub or repeater number and arrangement; See Table 7.
Table 7 communications parameter
| Communication modes | Fiber optic Ethernet/CAN |
| Communication speed | Gigabit/1-2 million |
| The communication interface waterproof measure | Connect in the fiber optic Ethernet control cabinet/CAN waterproof aviation plug |
| The communication interface shielding measure | CAN double shield twisted-pair feeder |
| Multichannel hub or repeater number | 24 mouthfuls of optical fiber switch, 16 fiber optic Ethernet/CAN protocol converters |
| The communication cable total length | Optical fiber: from the control room to approximately 1500 meters of control cabinet distance/CAN |
| The communication cable total weight | About 300KG |
| Control the response time of 1100 actuators | 100ms---1s |
Power supply
1) the supply power mode block diagram of 1104 actuators, power consumption: 20KW
2) total length of service cable, weight
The total length of service cable: 10000M
Weight: 1000KG
EMC designs consideration
1) power supply Anti-surging design
2) the CAN bus communication adopts the twisted-pair feeder double shield
3) ethernet communication adopts optical fiber cable
4) the low-voltage power supply cable adopts shielded type cable overcoat bellows
5) threading in steel pipe, shielded type cable are adopted in the alternating current 220V power supply
6) control box adopts almag, built-in sheet metal shielding
7) stepping motor adopts low voltage control
8) the actuator controller housing connect the earth less than
9) the outer shell joint the earth of control cabinet less than
10) Wiring technique specialized designs
Main control computer software shows information
As the major function of Fig. 6 master controller and the major function of Fig. 7 slave computer.The demonstration information of 1104 actuators:
The A real-time position information,
The positive and negative spacing mechanical position limitation of B,
The positive negative electricity of C is spacing.
A little detections that the master controller automatic detection function is realized:
A.1104 " 0 " place value of an actuator detects
B.1104 the positive and negative mechanical position limitation of an actuator detects
C.1104 the spacing detection of positive negative electricity of an actuator
D.1104 the detection and localization of actuator
11) test experience
First do single displacement actuator prototype experiment, use two-frequency laser interferometer to carry out experiment test, whether analyzing test data satisfies specification requirement, and stability and the reliability of test actuator control circuit are studied the problem that exists and explore Innovative method.Then, the actuator that index request is satisfied in 5 cover tests is arranged on the actual motion that carried out month on Type At The Sheshan Station, Shanghai City observatory experiment frame and detects.
Single actuator test platform and condition
(1) constant temperature, constant-humidity clean laboratory;
(2) German JENAer ZLM800 two-frequency laser interferometer, wherein optics is all produced by ZEISS;
(3) the America NI Labview7.1 of company software suite;
(4) virtual instrument hardware kit: digital multimeter, oscilloscope, signal generator, motion controller, data acquisition card;
(5) afterburning equipment: special-purpose crossbeam lever force-adding device, the brachium ratio is set makes counterweight weight that an end applies amplify 12 times to be carried on actuator, can be implemented in draw, pressure and side loading apply function;
(6) carry out active surface plate and actuator translocation on the special overturn platform.
The test job content
The simulation actuator carries snow load to the environment of actuator at real work condition lower panel, support and wind, mainly carries out the test of three directions in this test, is respectively:
A, axial tension test, test load is respectively 150kg, 300kg.Carry out respectively resolution test, creep test, accuracy test under this working condition;
B, axial compressive force test, test load is respectively 150kg, 300kg.Carry out respectively resolution test, creep test, accuracy test under this working condition;
C, side force test, test load is 150kg.Carry out resolution test under this working condition, creep test, accuracy test;
D, no load test: carry out the backlash journey test under idle condition;
E, specifically test and the execution of 65 meters actuators test outlines of the detailed foundation of record entry.
Claims (2)
1. the Active Control Method of a meter radio telescope primary reflection surface, it is characterized in that, the primary reflection surface of radio telescope adopts the combined main reflecting surface that is spliced by some sub-panels, every sub-panel is wherein controlled by some actuators, control system is controlled respectively the action of all actuators, by ACTIVE CONTROL, makes the shape of the primary reflection surface that is spliced into meet the requirement that radio astronomy is observed, concrete control step is as follows
(1), the main control computer issuing command of astronomical observation computer to the telescope minute surface, comprise start, shutdown and all calculating, the running of main control computer, all carry out under the instruction of astronomical observation computer, main control computer is controlled whole controlling organizations of telescope minute surface;
(2), the primary reflection surface of 65 meter radio telescopes is divided into 8 sectors, all actuators in each sector are as a control group; Each control group arranges a sector controller;
(3), after main control computer start, at first carry out initialization, all actuator controllers are ready;
(4), according to the requirement of control system, main control computer is resolved control command, sends by local area network (LAN) the controlling value that this system respectively organizes actuator:
Main control computer is connected with 8 sector controllers respectively by 24 mouthfuls of optical fiber switch; And send instruction to each sector controller;
(5), the server of each sector controller receives the instruction of main control computer, and receive simultaneously the actuator data that obtain by detection system, when sending these data to main control computer, obtain the size of the power that each actuator should add according to this data processing operation;
(6), the server of each sector controller adopts asynchronous Non-Blocking I/O to send instruction to the microcontroller of each actuator successively; And simultaneously this command signal is sent to main control computer;
(7), between the server of main control computer and each sector controller, the both-way communication mode between the server of each sector controller and the microcontroller of each actuator is, AP adopts between PCF mode and LCU and communicates by letter;
(8), return to the state information of execution after each actuator microcontroller fill order, give the server of sector controller;
(9), the return information of the server of sector controller after with all actuator microcontroller fill orders sends to main control computer;
(10), this communication process finishes; The telescope state needs to change, or when changing, begins next communication process.
2. the Active Control Method of 65 meter radio telescope primary reflection surfaces according to claim 1, is characterized in that, wherein, the scheme that adopts in concrete steps is:
The automatically controlled requirement of actuator:
Move back and forth according to the instruction of control system, and have the position auto-lock function;
The major function of actuator microcontroller:
(1), repetitive positioning accuracy＜0.015mm;
(2), closed loop control function: microcontroller can be realized local closed loop control function;
(3), communication function: microcontroller must carry out communication with main control computer, and sends oneself state to main control computer;
(4), initiatively panel is controlled function:
A, can calculate in real time the compensation rate at each control point;
B, the microcontroller by bus and each actuator carry out communication;
C, can graphically show each control point state;
D, can carry out each actuator of manual adjustments by active surface panel control system main control computer;
E, can carry out data interaction with the antenna main control computer;
The Electro Magnetic Compatibility of control system;
Control system and element thereof must reach GB/T17618-1998 Information Technology Equipment immunity limit and the requirement of method of measurement CISPR24 (97) B level.
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| CN102520678A (en) * | 2011-11-04 | 2012-06-27 | 中国科学院国家天文台南京天文光学技术研究所 | Remote control system for active reflection panel of radio telescope |
| CN104733829B (en) * | 2013-12-20 | 2017-05-10 | 中国科学院国家天文台 | Cable drive system for astronomical telescope |
| CN105827312A (en) * | 2016-04-28 | 2016-08-03 | 中国科学院国家天文台南京天文光学技术研究所 | Visible light communication method controlled by active reflector of radio astronomy-telescope and device thereof |
| CN107643770A (en) * | 2017-09-15 | 2018-01-30 | 中国科学院长春光学精密机械与物理研究所 | A kind of telescope control system and method |
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| CN1343897A (en) * | 2001-06-05 | 2002-04-10 | 中国科学院国家天文台南京天文光学技术研究所 | Mirror shift control system for large astronomical telescope |
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| CN1343897A (en) * | 2001-06-05 | 2002-04-10 | 中国科学院国家天文台南京天文光学技术研究所 | Mirror shift control system for large astronomical telescope |
| CN101183173A (en) * | 2007-11-02 | 2008-05-21 | 中国科学院国家天文台南京天文光学技术研究所 | Control method for large caliber astronomical arcs movement |
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