CN211262110U - Double-channel position detection circuit of space active sun wing spreading mechanism - Google Patents
Double-channel position detection circuit of space active sun wing spreading mechanism Download PDFInfo
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- CN211262110U CN211262110U CN201921423503.4U CN201921423503U CN211262110U CN 211262110 U CN211262110 U CN 211262110U CN 201921423503 U CN201921423503 U CN 201921423503U CN 211262110 U CN211262110 U CN 211262110U
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Abstract
The utility model relates to a two channel position detection circuitry of active sun wing of space mechanism of opening, include: the digital control circuit provides the excitation voltage required by the first rotary transformer through the first channel decoding circuit, conditions the signal fed back by the first rotary transformer and then decodes the signal, provides the excitation voltage required by the second rotary transformer through the second channel decoding circuit, conditions the signal fed back by the second rotary transformer and then decodes the signal, performs time sequence analysis and DSP control program design on the first channel decoding circuit and the second channel decoding circuit, and obtains the angles of the rotating output shafts of the two unfolding mechanisms so as to realize closed-loop control of the system. The utility model has the advantages that: the space active solar wing spreading mechanism is simple in structure, stable, reliable and high in resolution, and can achieve the repeated spreading function of the space active solar wing spreading mechanism with high precision, reliability and stability.
Description
Technical Field
The utility model relates to a space active sun wing spreading mechanism binary channels position detection circuitry.
Background
With the development of the aerospace industry and the increasing of space exploration activities, solar wings have become the main form of energy source of spacecrafts. The active motor drive control can simplify the sun wing unfolding mechanism into a motor servo system, detect the angle of the unfolding mechanism in real time, and carry out closed-loop control on the position of the system through a motor servo control strategy, so as to accurately and reliably control the unfolding of the sun wing.
The position feedback function design commonly used for servo control of the electric actuating mechanism at present usually adopts a form of combining a position sensor and a corresponding circuit or software, and the commonly used position sensor comprises a photoelectric encoder, a potentiometer, a Hall sensor and the like. The traditional electric servo mechanisms of companies all adopt Hall sensors or potentiometers, and output feedback analog quantity is conditioned by signals and then output to an A/D conversion circuit for position feedback closed-loop control.
The defects of the existing position detection technology are mainly shown in the following aspects:
firstly, the traditional electric servo mechanisms all adopt a Hall sensor or a potentiometer, output feedback analog quantity is output to an A/D conversion circuit for position feedback closed-loop control after signal conditioning, and the problems of low resolution and low precision under the conditions of limited corner stroke and complex system are solved;
secondly, resolution deviation of a commonly adopted contact type brush conductive plastic potentiometer, abrasion caused by the fact that an electric brush moves and a resistor keeps contact, output is influenced by the environment, and the accuracy of the potentiometer is influenced by temperature change, abrasion, dirt, vibration and the like; the Hall sensor has lower precision, and the signal is extremely easy to be influenced by temperature and greatly interfered by a strong magnetic field. The common potentiometer and the Hall sensor can not meet the severe space environments of high vacuum, wide temperature change, strong solar electromagnetic radiation, high-energy particle radiation, magnetic fields and the like;
thirdly, the special potentiometer and the Hall sensor which are suitable for the space environment are customized, and the weight, the power consumption and the cost cannot meet the strict requirements of the small satellite on the weight and the power consumption of the satellite parts due to light weight and low power.
Fourthly, charged particles in a space irradiation environment can cause abnormal work and actual effect of the space-borne electronic equipment in the period, the temperature change range of the space environment is large, most of the existing feedback analog quantity conversion circuits adopt imported industrial grade plastic package components, and the working temperature range, the reliability, the packaging materials and the process, the irradiation shielding and the like of the existing feedback analog quantity conversion circuits cannot meet the requirements of the space environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a binary channels position detection circuitry is opened to active sun wing in space is provided, it reduces steering wheel installation space effectively, greatly improves measurement reliability.
In order to solve the technical problem, the utility model discloses a technical scheme is: a space active solar wing spreading mechanism dual-channel position detection circuit is characterized by comprising: a first channel decoding circuit, a second channel decoding circuit and a digital control circuit,
the first channel decoding circuit is connected with a first rotary transformer through a first excitation amplifying circuit and a first conditioning circuit, the first channel decoding circuit provides two paths of differential excitation signals for the first rotary transformer, the first rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the first channel decoding circuit after the modulation;
the second channel decoding circuit is connected with a second rotary transformer through a second excitation amplifying circuit and a second conditioning circuit, the second channel decoding circuit provides two paths of differential excitation signals for the second rotary transformer, the second rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the second channel decoding circuit after the modulation;
the digital control circuit provides excitation voltage required by the first rotary transformer through the first channel decoding circuit, conditions and then decodes signals fed back by the first rotary transformer, provides excitation voltage required by the second rotary transformer through the second channel decoding circuit, conditions and then decodes signals fed back by the second rotary transformer, performs time sequence analysis and DSP control program design on the first channel decoding circuit and the second channel decoding circuit, and obtains the angles of the rotary output shafts of the two unfolding mechanisms so as to realize closed-loop control of the system.
Compared with the prior art, the utility model discloses following profitable technological effect has:
simple structure includes: the first channel decoding circuit is connected with a first rotary transformer through a first excitation amplifying circuit and a first conditioning circuit, the first channel decoding circuit provides two paths of differential excitation signals for the first rotary transformer, the first rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the first channel decoding circuit after the modulation; the second channel decoding circuit is connected with a second rotary transformer through a second excitation amplifying circuit and a second conditioning circuit, the second channel decoding circuit provides two paths of differential excitation signals for the second rotary transformer, the second rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the second channel decoding circuit after the modulation; the digital control circuit provides excitation voltage required by the first rotary transformer through the first channel decoding circuit, conditions and then decodes signals fed back by the first rotary transformer, provides excitation voltage required by the second rotary transformer through the second channel decoding circuit, conditions and then decodes signals fed back by the second rotary transformer, analyzes the time sequence of the first channel decoding circuit and the second channel decoding circuit and designs a DSP control program, obtains the angles of the rotary output shafts of the two expansion mechanisms, and performs system closed-loop control. The problems of low resolution and low precision under the limited corner stroke caused by using an angle sensor and a potentiometer of the traditional servo mechanism can be well solved, the control quantity is adjusted by detecting the unfolding angle of the mechanism in real time, and the repeated unfolding function of the space active solar wing unfolding mechanism with high precision, high reliability and high stability is realized.
Drawings
Fig. 1 is an electrical schematic diagram of the dual-channel position detection circuit of the space active sun wing spreading mechanism of the present invention;
fig. 2 is a schematic diagram of the circuit connection between the digital control circuit and the dual-channel decoding circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but these examples are only illustrative and do not limit the scope of the present invention. Referring to fig. 1 to 2, the utility model discloses a two-channel position detection circuit of space active sun wing spreading mechanism, including: a first channel decoding circuit, a second channel decoding circuit and a digital control circuit,
the first channel decoding circuit is connected with a first rotary transformer through a first excitation amplifying circuit and a first conditioning circuit, the first channel decoding circuit provides two paths of differential excitation signals for the first rotary transformer, the first rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the first channel decoding circuit after the modulation;
the second channel decoding circuit is connected with a second rotary transformer through a second excitation amplifying circuit and a second conditioning circuit, the second channel decoding circuit provides two paths of differential excitation signals for the second rotary transformer, the second rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the second channel decoding circuit after the modulation;
the digital control circuit provides excitation voltage required by the first rotary transformer through the first channel decoding circuit, conditions and then decodes signals fed back by the first rotary transformer, provides excitation voltage required by the second rotary transformer through the second channel decoding circuit, conditions and then decodes signals fed back by the second rotary transformer, performs time sequence analysis and DSP control program design on the first channel decoding circuit and the second channel decoding circuit, and obtains the angles of the rotary output shafts of the two unfolding mechanisms so as to realize closed-loop control of the system.
In one embodiment, the resolver is an absolute position tracking position sensor.
In one embodiment, the position sensor employs a J20XFW004B chip.
In one embodiment, the digital control circuit employs a JDSPF28335 type digital signal processor.
In one embodiment, the first channel decoding circuit and the second channel decoding circuit share the same SPI interface of the JDSPF28335 type digital signal processor, and the collected detection channels are controlled and selected by a chip selection signal CS, so as to serially read the output shaft angle information of the two deployment actuators.
In one embodiment, the excitation amplifying circuit adopts a circuit taking an FX0041GTB chip as a core.
In one embodiment, the conditioning circuit employs a 7F4277A core circuit.
In one embodiment, the first channel decoding circuit and the second channel decoding circuit employ an FX2S1210G chip as a core circuit.
As a specific embodiment, a domestic rotary transformer with the model number of J20XFW004B is adopted and is installed on an output shaft of a speed reducing mechanism, and the position angle information of the output shaft is measured in real time.
As a specific embodiment, the analog control circuit takes a domestic shaft angle conversion chip FX2S1210G as a core, and provides two paths of differential excitation signals for the resolver.
As a specific embodiment, according to the specific parameter requirements of the rotary transformer and the requirements of the input signal of the FX2S1210G chip, the excitation amplifying circuit with the domestic single-channel power amplifier chip FX0041GTB as the core and the conditioning circuit with the domestic four-channel operational amplifier chip 7F4277A as the core are adopted to meet the requirements of the rotary transformer and the chips.
As a specific embodiment, a domestic JDSPF28335 type digital signal processor is adopted to realize control and serial data reading through SPI connection and serial communication for the data of the angular position register of the output shaft of the unfolding execution mechanism output by the FX2S1210G chip. As a specific embodiment, in order to adapt to the characteristics of a single-channel SPI interface of a DSP, a dual-channel FX2S1210G chip shares the same SPI interface, and the collected detection channels are controlled and selected by a chip selection signal CS, so as to serially read the output shaft angle information of two deployment actuators.
As a specific example, in the software of JDSPF28335, the operation mode of the FX2S1210G chip is configured by strict write timing control, and data is read out at the corresponding timing.
Experiment of
The utility model discloses a space active sun wing spreading mechanism binary channels position detection circuitry provides the required excitation voltage of rotary transformer through the FX2S1210G chip and decodes after taking care of the signal of rotary transformer feedback, to decoding circuit chronogenesis analysis and DSP control program design, accomplishes FX2S1210G data reception, acquires the angle of spreading mechanism rotation output shaft, carries out system closed loop control. The scheme is proved by tests to be capable of effectively detecting the angle position of the output shaft of the unfolding mechanism and carrying out closed-loop control on the system, the stability and the repeatability of position detection are superior to 0.02 degrees, the resolution can reach 16bit precision to the maximum, and the requirements of the system control on the accuracy and the stability of the angle position detection are met. The system test result shows that the circuit is simple and reliable, strong in anti-interference performance, high in detection precision, strong in operability and good in transportability, and can meet the requirements of a space active solar wing spreading mechanism on high reliability, severe environment adaptability and the like of on-satellite components.
As specific embodiment, the utility model discloses a position detection stability and repeatability are superior to 0.02, and the resolution ratio can reach 16bit precision, and is reliable and stable, and the resolution ratio is high.
As a specific embodiment, the domestic rotary transformer adopted by the position sensor has the advantages of high reliability, long service life, no contact electric brush, no electrical contact noise, high resolution, strong anti-interference capability and the like, and can be well adapted to the space environment.
As specific embodiment, the utility model discloses the core chip of circuit all is domestic metal-packaged product, and product quality and reliability are higher, and are better to space environment adaptability, can effectively reduce the failure rate of electronic components under adverse space environment.
As specific embodiment, the utility model discloses a detection circuitry uses in the closed-loop control of space active sun wing deployment mechanism, makes the expansion function of solar wing nimble more, steady, accurate, has improved the mobility that the solar wing expanded the angle.
The utility model discloses a following profitable technological effect:
simple structure includes: the first channel decoding circuit is connected with a first rotary transformer through a first excitation amplifying circuit and a first conditioning circuit, the first channel decoding circuit provides two paths of differential excitation signals for the first rotary transformer, the first rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the first channel decoding circuit after the modulation; the second channel decoding circuit is connected with a second rotary transformer through a second excitation amplifying circuit and a second conditioning circuit, the second channel decoding circuit provides two paths of differential excitation signals for the second rotary transformer, the second rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the second channel decoding circuit after the modulation; the digital control circuit provides excitation voltage required by the first rotary transformer through the first channel decoding circuit, conditions and then decodes signals fed back by the first rotary transformer, provides excitation voltage required by the second rotary transformer through the second channel decoding circuit, conditions and then decodes signals fed back by the second rotary transformer, analyzes the time sequence of the first channel decoding circuit and the second channel decoding circuit and designs a DSP control program, obtains the angles of the rotary output shafts of the two expansion mechanisms, and performs system closed-loop control. The problems of low resolution and low precision under the limited corner stroke caused by using an angle sensor and a potentiometer of the traditional servo mechanism can be well solved, the control quantity is adjusted by detecting the unfolding angle of the mechanism in real time, and the repeated unfolding function of the space active solar wing unfolding mechanism with high precision, high reliability and high stability is realized.
Although the preferred embodiments of the present invention have been disclosed above, the present invention is not limited thereto. It is obvious that not all embodiments need be, nor cannot be exhaustive here. Any person skilled in the art can change and modify the research scheme of the present invention by adopting the design and content of the above disclosed embodiments without departing from the spirit and scope of the present invention, and therefore, any simple modification, parameter change and modification of the above embodiments by the research entity of the present invention all belong to the protection scope of the scheme of the present invention.
Claims (8)
1. A space active solar wing spreading mechanism dual-channel position detection circuit is characterized by comprising: a first channel decoding circuit, a second channel decoding circuit and a digital control circuit,
the first channel decoding circuit is connected with a first rotary transformer through a first excitation amplifying circuit and a first conditioning circuit, the first channel decoding circuit provides two paths of differential excitation signals for the first rotary transformer, the first rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the first channel decoding circuit after the modulation;
the second channel decoding circuit is connected with a second rotary transformer through a second excitation amplifying circuit and a second conditioning circuit, the second channel decoding circuit provides two paths of differential excitation signals for the second rotary transformer, the second rotary transformer generates sine and cosine signals through the excitation signals, and the data processing is carried out by the second channel decoding circuit after the modulation;
the digital control circuit provides excitation voltage required by the first rotary transformer through the first channel decoding circuit, conditions and then decodes signals fed back by the first rotary transformer, provides excitation voltage required by the second rotary transformer through the second channel decoding circuit, conditions and then decodes signals fed back by the second rotary transformer, performs time sequence analysis and DSP control programs on the first channel decoding circuit and the second channel decoding circuit, and obtains the angles of the rotary output shafts of the two unfolding mechanisms so as to realize closed-loop control of the system.
2. The space active solar span opening mechanism dual channel position detection circuit of claim 1 wherein the rotary transformer is an absolute position tracking position sensor.
3. The space active solar span opening mechanism dual channel position sensing circuit of claim 2 wherein the position sensor employs a J20XFW004B chip.
4. The space active solar span opening mechanism dual channel position detection circuit of claim 3 wherein the digital control circuit employs a JDSPF28335 type digital signal processor.
5. The space active solar wing spreading mechanism double-channel position detection circuit according to claim 4, wherein the first channel decoding circuit and the second channel decoding circuit share the same SPI interface of the JDSPF28335 type digital signal processor, and the collected detection channels are controlled and selected through a chip selection signal CS to serially read the output shaft angle information of two spreading execution mechanisms.
6. The space active solar span opening mechanism dual channel position detection circuit of claim 5 wherein the excitation amplification circuit employs FX0041GTB chip-centric circuitry.
7. The space active solar span opening mechanism dual channel position detection circuit of claim 4 wherein the conditioning circuit employs a 7F4277A core circuit.
8. The dual-channel position detection circuit for a space active solar span opening mechanism according to claim 3, wherein the first channel decoding circuit and the second channel decoding circuit are FX2S1210G chip-based circuits.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921423503.4U CN211262110U (en) | 2019-08-29 | 2019-08-29 | Double-channel position detection circuit of space active sun wing spreading mechanism |
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| CN201921423503.4U CN211262110U (en) | 2019-08-29 | 2019-08-29 | Double-channel position detection circuit of space active sun wing spreading mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553573A (en) * | 2019-08-29 | 2019-12-10 | 贵州航天控制技术有限公司 | Double-channel position detection circuit of space active sun wing spreading mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553573A (en) * | 2019-08-29 | 2019-12-10 | 贵州航天控制技术有限公司 | Double-channel position detection circuit of space active sun wing spreading mechanism |
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