212 results about "Satellite telemetry" patented technology

A system for executing diagnosis of vehicle performance using satellite telemetry technology includes a diagnostic unit for compiling telemetry data, transmitted in real-time, of an engine and various parts of a vehicle, comparing the telemetry data with specific values of the engine and various parts to determine if there are any abnormalities in vehicle performance, and monitoring diagnostic results of vehicle performance; and a communications unit for performing communications in real-time through a network with an external user requesting vehicle performance diagnostic results of the diagnostic unit. Accordingly, the driver or external user may easily determine if there are abnormalities in vehicle performance, take steps to cope with vehicle malfunctions before they occur, and know the precise location of any abnormal areas of vehicle performance.

An N-Tiered enterprise and / or N-Tiered Web-based enterprise system and methods for managing, monitoring, coordinating the procedures of and optionally controlling a fleet of geosynchronous satellites through a distributed network such as the Internet. The system and associated object oriented software architecture seamlessly supports monitoring and analyzing real-time, near real-time, historical / playback, simulated and archived satellite telemetry as well as Tracking, Telemetry and Control (TT&C) ground system generated data products such as real-time alerts, archived alerts and ground system server statuses from a group of legacy distributed TT&C wide area network (WAN) ground station systems located around the world.

The invention discloses a satellite telemetry data reduction processing method. Firstly, satellite test basic configuration information is stored in a basic database, based on the configuration information in the basic database, the test command sequence is compiled by imaging interface according to satellite test requirement and stored in the basic database; the command is transmitted to the satellite according to the test command sequence, and the satellite issues telemetry parameter true codes to a ground test network; the telemetry parameter true codes are resolved into corresponding engineering values according to the data resolving mode stored in the basic database again to be stored in a real-time database; and finally, the modification items of the telemetry parameter resolving mode is automatically mapped into the real-time database. The inventive method can realize image display of the test process and the batching of test process compilation, ensure the consistency of data in the test process and the completeness of data when updating configuration resolving mode. In the test, the progress of the whole system is not stopped, the system interpretation can be executed according to the preset test rule, and the automation of the test can be realized.

The invention discloses an abnormity detection method for satellite telemetry data through an adversarial network autoencoder, and the method comprises the steps: breaking the limitation of a traditional empirical model, and employing a pure data driving model; on the basis of a variational autoencoder, introducing a confrontation network idea, using a bidirectional LSTM (Long Short Term Memory) (Long-short term memory network) as a discriminator, and judging whether satellite telemetry data is abnormal or not by using errors of reconstructed data and original data; aiming at the redundancy problem of a satellite sensor, the conventional situation is broken through, and a Markov distance is used for measuring a reconstruction error. In combination with periodicity of satellite orbit operation, a dynamic threshold determination method based on a periodic time window is provided. The method has the advantages that pure data driving is adopted, expert experience is not needed, and the method can be suitable for various occasions; By combining the respective advantages of the variational auto-encoder and the generative adversarial network, the proposed network has the characteristics of high training speed and relatively easy convergence; eliminating redundant data influence between satellite telemetry data by adopting a Mahalanobis distance. According to the periodicity of the satellite, the dynamic threshold method based on the periodic time window is provided, and the misjudgment rate is reduced.

The invention provides a method for transmitting satellite telemetry data. Devices adopted in the method are a house keeping central computer, a house keeping data storage module and a data downward transmission module; the steps of the method include: (1) the house keeping central computer collects telemetry data from all lower-level computers of the satellite to send the house keeping data storage module; (2) the house keeping data storage module receives, format and store the telemetry data; (3) based on the ground command control, the house keeping data storage module transmits the telemetry data to the data downward transmission module; (4) the data downward transmission module transmits the telemetry data downward. The method overcomes the conventional defects of low signal channel speed and limited storage capacity, improves the transmission speed and the wholeness of the satellite telemetry data, improves the downward telemetry data quantity of the satellite and can store and transmit the telemetry data of the satellite in full track and full time period and the important data of the whole satellite.

The invention discloses a satellite telemetry data treatment system and a realization method of the system, which solves the problems of telemetry data treatment, such as universality, extensibility and cross-platform. The system comprises a log module, a pointer container module, a memory management module, a basic data management module, a configuration information management module, an index table management module, a data pretreatment module, a treatment method module, a data analysis module and a data initialization and management module. The method comprises preparing configuration file and basic data, and creating a frame index table or a packet index table by use of a dynamic array, i.e. pointer container; receiving telemetry data, and carrying out effective judgment and data integration; carrying out parameter treatment, and treating the parameter result according to a manner defined by a customer; and stopping until all of the telemetry data is treated.

A satellite telemetry data unpacking method which comprises the steps of: firstly defining a data format and storing the data format in a configuration document; receiving telemetry data from the front end and obtaining frame data from the telemetry data according to the frame data format defined in the configuration document; analyzing and reading package data from the frame data according to the package data format defined in the configuration document; and analyzing and reading the package data from the frame data and determining the validity of the package data according to package head information after receiving the complicate package data. If the package data are valid, the invention processes the data in the package and discards the received package data if the package data are invalid.

The invention discloses a system for real-time monitoring the abnormal change of satellite telemetry parameters, comprising a data receiving module, a data preprocessing module, a parametric variation detection module, an out-of-range abnormality judging module, an amplitude variation abnormality judging module, a long periodic variation abnormality judging module, an alarming filtering module and a data recording module. By adopting the invention, the abnormal variations of the trend of the telemetry parameters can be detected, wherein the variations include the short-term trend abnormal variation and the long-term trend abnormal variation, the periodic variations of the satellite telemetry parameters can be continuously and circularly monitored, the exact monitoring and alarming for various abnormal circumstances of the satellite telemetry variations can be realized, and plenty of field testing information is provided for analyzers. The system solves the problems of real-time monitoring, judging, alarming, and the like of many telemetry parameters and has higher sensitivity and real-time property, thereby reducing the labor intensity of a tester and improving the test efficiency.

The invention provides a satellite telemetry data abnormity detection method based on the DTW, and relates to the field of satellite telemetry data abnormity detection. The problems that by means of an existing detection method, missing satellite part abnormity detection is caused when abnormity parameters do not exceed alarm thresholds, large deviation exists when segmentation is conducted on satellite telemetry data with periodic characteristics according to the fixed point number, and the abnormity detection result is not accurate enough when tiny offset happens to the time sequence and the measurement result is not accurate enough are solved. The method includes the steps of conducting segmentation on satellite telemetry data with argument sudden change points as marks, calculating the average DTW distance value in various categories in the time sequence containing category labels, obtaining a time sequence x' where abnormity detection is to be conducted, calculating the DTW distance between x' and the time sequence X containing the category labels and determining the minimum DTW distance dmin between the x' and the quasi category l', and determining whether x' is an abnormal sequence or not according to the relation between dmin and the formula (please see the formula in the specification). The method is suitable for satellite telemetry data abnormity detection.

The invention provides a method and a system for satellite telemetry speed increasing and load data fusion. A measurement and control function and a data transmission function of a microsatellite are integrally designed, and the measurement and control function and the data transmission function are realized in a measurement and control mode and a data transmission mode respectively; in the measurement and control mode, a USB (universal serial bus) measurement and control system is adopted to download telemetry data; in the data transmission mode, acquired effective load data and the telemetry data are packaged, mixed and downloaded, and then the load data and the telemetry data are analyzed on the ground through a virtual channel identification in a classified manner. According to the method and the system for satellite telemetry speed increasing and load data fusion, measurement and control data and data transmission data are effectively fused, the ratio of the measurement and control data to the data transmission data can be flexibly adjusted, and the limit rate of measurement and control data transmission is greatly increased; redundancy of on-board equipment is effectively reduced, allocation of on-board resources is reasonably optimized, the utilization rate of space is remarkably increased, power consumption is remarkably reduced, and besides, the current condition of shortage of frequency resources is relieved.

The invention discloses a communication satellite simulator and a general telemetry and telecontrol stream data transmission method. The communication satellite simulator comprises a main thread module and a measurement and control interface module, wherein the main thread module is mainly responsible for coordination work of the modules, the measurement and control interface module is responsible for simulation of a telecontrol subsystem, transmission of telemetry data and receiving of a telecontrol command, and the main thread module coordinates with the measurement and control interface module to achieve simulation of the satellite telemetry and telecontrol data processing procedure and simulation of the telecontrol subsystem. The communication satellite simulator and the general telemetry and telecontrol stream data transmission method have the advantages that the measurement and control interface module is responsible for external interaction of all telemetry and telecontrol data streams, and therefore high cohesion and low coupling of transmission of the telemetry and telecontrol data streams are guaranteed; the transmission method of the telemetry and telecontrol data streams is easy to modify; no other parts inside the satellite simulator contain pre-coded telecontrol data which are sensitive information than the measurement and control interface module, and therefore safety of the telecontrol data is guaranteed.

The invention discloses a telemetry data processing method, belonging to the technical field of satellite telemetry and remote control. The telemetry data processing method comprises the steps of: preprocessing true forms of satellite download data; processing a format formed after preprocessing into queues and managing the format queues; and extracting data frames in the format queues. Accordingto the invention, the true forms of different formats in multi-spacecraft telemetry data can be processed uniformly.

The invention relates to a telemetry parameter and correlation with satellite control behavior-based satellite condition monitoring method. The method comprises the following steps that: telemetry data of satellite controlled analog quantity are received through satellite ground station equipment, and whether the analog quantity is correlated to satellite states is judged, if the analog quantity is correlated to the satellite states, the analog quantity is determined as a corresponding telemetry parameter; correlation relationships of the change modes of the telemetry parameter and satellite control behaviors are analyzed, and characteristic quantity is defined; characteristic quantity data of a monitored satellite under different types of states are obtained according to the characteristic quantity and historical telemetry data; the probability model of the characteristic quantity is established through adopting a statistical method; and the telemetry data of the telemetry parameter are received according to a time sequence, and the characteristic quantity data are extracted, and the state of the monitored satellite is judged through using a statistical method and according to the established probability model. The method of the invention has high efficiency, is not sensitive to noises and outliers, and is consistent with the engineering practice of the discrete value of the satellite telemetry data at a finite level. With the method adopted, inter-threshold anomalies can be identified and warned against as early as possible.

The invention discloses a multi-dimensional time sequence classification method based on mahalanobis distance DTW, and relates to the multi-dimensional time sequence classification method. In order to solve the problems that aiming at satellite telemetry data, a fixed point segmentation effect is non-ideal, due to the facts that relativity exists between multi-dimensional time sequences and small deviation exists between the time sequences, a measuring result is not accurate, therefore a classification result is not accurate, and the multi-dimensional time sequence classification method based on the mahalanobis distance DTW is provided. The method comprises the steps that 1 a multi-dimensional time sequence X={x <1>, x <2>, ..., x<j>, ..., x<n>} used for training and a classification label L={l<1>, l<2>, ..., l<n>}are obtained; 2 a to-be-classified multi-dimensional time sequence X'={x' <1>, x' <2>, ..., x'<j>, ..., x'<n>} is extracted; 3 a DTW distance sequence between the X'={x' <1>, x' <2>, ..., x'<j>, ..., x'<n>} and the X={x <1>, x <2>, ..., x<j>, ..., x<n>} is calculated; 4 classification is conducted on the to-be-classified multi-dimensional time sequence X'={x' <1>, x' <2>, ..., x'<j>, ..., x'<m>} according to neighboring numbers of K which is set by using a KNN classification method based on the mahalanobis DTW distance, and the classification of the to-be-classified multi-dimensional time sequence is determined. The method is applied to the field of multi-dimensional time sequence classification.

The invention provides a ground comprehensive test system and method for satellite data transmission. The satellite data transmission system is connected with the ground comprehensive test system in awired or wireless manner; the ground comprehensive test system for satellite data transmission comprises a plurality of test devices and a remote measurement monitoring terminal, wherein the test device is connected with the telemetry monitoring terminal through an Ethernet switch, in the test process, the telemetry monitoring terminal sends a remote control instruction, and under the support ofthe test device, a satellite completes corresponding operation according to the remote control instruction; data collected by satellite telemetry is also transmitted to the telemetry monitoring terminal under the support of the test equipment, and the telemetry monitoring terminal receives and monitors effective load data and telemetry data; the telemetry monitoring terminal comprises a baseband processor configuration module, a frequency converter configuration module, a telemetry monitoring module, a frequency spectrum configuration module, a real-time signal analysis configuration module and a power meter configuration module.

Provided is an apparatus and method for monitoring a status of a satellite, including classifying satellite telemetry information and space weather information and storing the information in a storage unit including respective databases, predicting whether a predetermined type of satellite failure occurs based on the space weather information, and generating satellite control command information to change a status of a predetermined satellite configuration when a satellite failure determining index used to determine a possibility of the satellite failure is beyond a predetermined critical alert range.

The invention discloses an S-band multi-channel high-precision space ranging transponder. The S-band multi-channel high-precision space ranging transponder comprises a power supply, a command module,a receiving channel, a digital baseband, a transmission channel, an interface module, and a self-calibration module, wherein the receiving channel is used for receiving an uplink radio-frequency signal and performing low noise amplification, down conversion, intermediate frequency filtering, intermediate frequency signal amplification, and AGC telemetry control; the digital baseband is used for sampling and outputting calculated PCM telemetry code, synchronous clock, and strobe pulse after acquisition and tracking of a spreading code, acquisition and tracking of a carrier wave, and remote control information bit synchronization are conducted on the uplink telemetry channel; the PCM telemetry code is subjected to spectrum spreading and BPSK modulation in a downlink telemetry channel, and amodulated downlink spread spectrum signal is outputted; a range zero value of a transponder is calculated; the transmission channel is used for performing uplink frequency conversion, radio frequencyfiltering, and power amplification, and then a radio frequency signal is obtained and transmitted; the interface module is used for interacting with an on-board computer for satellite telemetry data,transponder telemetry data, and satellite remote control data; and the self-calibration module calculates the range zero value of the self-calibration module according to the digital baseband for self-calibration. The S-band multi-channel high-precision space ranging transponder has the advantages that the function is complete, ranging precision is high, and the structure is simple.

The invention discloses a rule-based satellite telemetry data analysis system. The system comprises a rule editing system and an online analysis subsystem, wherein the rule editing system serves as aninput port of diagnosis rules to provide a graphic rule editing mode and a script rule editing mode and write association judgment diagnosis rules, condition judgment diagnosis rules, mode judgment diagnosis rules, mathematic and logic operation diagnosis rules and other diagnosis rules for one-dimensional telemetry and multi-dimensional telemetry through associated satellite telemetry parameters, and the rule editing system is provided with a rule base; and the online analysis subsystem reads the rules compiled by a user from the rule base and loads the rules into an analysis and judgment process, the analysis process performs analysis and diagnosis on real-time telemetry data according to the rules by receiving telemetry physical quantity data from the Internet, the judgment result is written into a result database, and the judgment result is sent out through the Internet. Through the system, a satellite test data judgment rule establishing tool is provided, and therefore the user can establish and modify the rules conveniently and quickly.

The invention discloses a real-time telemetry system and a real-time telemetry method of greenhouse gas column concentration. The real-time telemetry system comprises a fixed station building and a sun follower, wherein the station building is provided with an automatic sunroof; the sun follower is installed on a fixed platform in the station building and used for receiving sunlight from the sunroof, thereby automatically following the sun; emergent light of the sun follower passes through a sample tank to enter an infrared spectrometer, and an output end of the infrared spectrometer is connected with a computer; a micro weather station and a wireless data transmission antenna are installed outside the station building and connected to the corresponding input end of the computer; measured spectra and numerical simulation calculated spectra based on an atmospheric radiation transmission model are obtained simultaneously; and the greenhouse gas column concentration of various kinds is obtained in real time by using a nonlinear least-squares iteration method. According to the real-time telemetry system and the real-time telemetry method, the defects of the greenhouse gas three-dimensional high space-time resolution measurement technology are overcome, calibration data can be provided for airborne and satellite telemetry, and local long-term greenhouse gas observation results can be provided.

The invention provides a satellite integrated electronic system, which comprises a plurality of satellite subsystems configured to collect on-board task data and whole-satellite telemetry data and upload the on-board task data and the whole-satellite telemetry data to a network routing center; and the network routing center configured as a routing transfer center for communication among the plurality of satellite subsystems. The network routing center is configured to store and manage the on-board task data and the whole-satellite telemetry data, form shared data and / or key data, and perform whole-satellite autonomous health management according to the shared data and / or key data. The network routing center is also configured to back up the key data.

The invention discloses a multifunctional measurement and control and data distribution terminal for improving the real-time performance of data transmission, characterized by comprising a telecontrolcommand receiving module, a telemetry signal transmitting module and a data distributing module, wherein the telecontrol command module receives telecontrol signals of a ground monitoring and controlstation or a relay satellite, completes carrier demodulation, despreading, descrambling and decrypting processing, and transmits the processed telecontrol information code to an on-board computer; The telemetry signal transmitting module and the data distribution module are fused together to form a fusion module. The invention completes the fusion of the satellite telemetry data and the broadcastdistribution data to the user at the data level, which greatly reduces the weight, layout and power consumption requirements of the whole satellite, and improves the universality, reliability and flexibility compared with the traditional independent scheme of the satellite-borne TTC stand-alone machine and the data distribution terminal.

The invention relates to a satellite-ground integrated telemetry configuration management method in the technical field of satellite development process and on-orbit telemetry programming. The methodcomprises the following steps: automatic generation of a satellite-ground integrated frame table configuration file, hierarchical analysis of satellite telemetry, and satellite-ground telemetry closedloop comparison based on hierarchical telemetry equivalent generation. Hierarchical telemetry large table design is adopted. A ground telemetry analysis large table, a satellite service framing configuration file and a telemetry on-orbit programming beamlet can be automatically generated. The requirement for frequent change of a telemetry organization in the satellite development stage is well met, and the workload of framing arrangement and telemetry analysis configuration of comprehensive measurement, measurement and control and satellite service is reduced. The on-orbit telemetry programming modification capability of the long pipe system of the ground measurement and control center is improved and the on-orbit telemetry programming modification capability of the long pipe system is rapidly adapted. Three-dimensional telemetry configuration is adopted. Telemetry traceability is improved. Telemetry tracking and positioning capacity is enhanced, telemetry points and transmission paths are quickly positioned. Troubleshooting is facilitated.

The invention concerns a satellite telemetry, tracking and command system including ground stations, on-board units and a network control center. Each on-board unit is installed on board a respective satellite and is configured to compute a future orbital path of the satellite and determine when said respective satellite is within the visibility region of one of the ground stations on the basis of the satellite's positions and velocities computed and of the stored coverage data. When said respective satellite is within the visibility region of a ground station, the on-board unit may transmit to said ground station the downlink signals and receive therefrom the uplink signals; and carry out actions / operations corresponding to the commands received from the ground stations. The ground stations may be networked together and may send and receive information to and from the network control center.

The invention is applicable to the aerospace field and provides a satellite delay telemetry data storing and downloading method. The method comprises collecting real-time satellite telemetry data; storing the real-time satellite telemetry data into a nonvolatile memory in a cyclic covering mode to form uncompressed delay telemetry data; according to a preset storage cycle, synchronizing the critical data of the nonvolatile memory such as the current writing position, the reading position and the data downloading state to a satellite-mounted backup device; designing an uncompressed delay telemetry data downloading instruction, and according to user requirements, resuming uncompressed delay telemetry data which are not completely transmitted the last time or selecting uncompressed delay telemetry data corresponding to a downloading designated satellite time. The satellite delay telemetry data storing and downloading method has the advantages of solving the contradiction that microsatellites are large in overseas telemetry data volume and measurement and control modules are low in transmission bit rate, being capable of providing effectively support for satellite on-orbit abnormality location, overseas condition query and the like and effectively improving the system reliability.

The invention discloses a non-domain knowledge satellite sub-system exception detection method. The method includes, to a high-dimensional data space constructed by satellite telemetry data, constructing a related data set space by a shared neighbor algorithm with distance replaced by angle; screening attributes associated with exception by an angular offset attribute selection algorithm; and finally, calculating exception valve by normalized mahalanobis distance, calculating to obtain the exception threshold according to knowledge of statistics, and classifying the data set. The non-domain knowledge satellite sub-system exception detection method to the complicated satellite subsystem telemetry data has the advantages of higher detection accuracy and better effect according to repeated tests.

A nano satellite remote-measuring and remote-controlling method capable of switching communication path relates to a satellite remote-measuring and remote-controlling processing method. Without increasing the cost and the complexity of the satellite, the ground also can remotely measure and control the satellite when a malfunction occurs on an on-board computer. In this method, through detecting whether the updating frequency and the communication of remote-measuring data sent by the on-board computer of a satellite system is normal or not, a ground tracking telemetry control station judges whether a malfunction occurs on the on-board computer or not; when a malfunction occurs, the ground tracking telemetry control station directly communicates with a plurality of sub-systems of the satellite through a measuring and controlling sub-system. The method provided by this invention is applicable to the remote-measuring and remote-controlling data transmission of the nano satellite.

The invention provides a measurement, control and data transmission integrated system for micro-nano satellites, which comprises a measurement, control and data transmission integrated module, a processor module and a load module, and is characterized in that the processor module sends satellite telemetry data to the measurement, control and data transmission integrated module and receives telemetry quantity acquisition data of the measurement, control and data transmission integrated module; the load module receives the upper injection data of the measurement, control and data transmission integrated module and returns load data to the measurement, control and data transmission integrated module; the measurement, control and data transmission integrated module comprises a to-the-sky transceiver module and a to-the-ground transceiver module. The independent design of multiple single machines of a traditional satellite measurement and control and data transmission subsystem is replaced,the functions of measurement and control, data transmission, storage and the like are integrated, the functions of measurement and control and data transmission are achieved at the same time throughthe same channel, miniaturization, integration and simplification design of microsatellites is facilitated, the application efficiency of a ground measurement and control network is improved. The method is a future satellite-ground communication development trend.

The invention provides a satellite telemetry parameter allocation and scheduling method, including: step 1, the upper computer collects the whole satellite telemetry parameters from the lower computer, and the collection period is equal to the operation cycle of the upper computer; step 2, designs the telemetry frame format, and divides into fixed telemetry areas In the subcontracting telemetry area, the upper computer performs grouping according to the format of the telemetry frame; step 3, design a large table of telemetry data frames, and the upper computer performs grouping and downloading of telemetry data according to the large table of telemetry data frames. The present invention realizes the dynamic scheduling capability of satellite downlink telemetry data through the method of centralized allocation of telemetry parameters of the satellite upper computer, and can conveniently increase the downlink rate of the telemetry parameters of the tested system through the way of uplink injection during the satellite test process, It can more effectively judge the state of the test system, and can focus on downloading different telemetry parameters according to the different stages of the satellite in orbit, and realize the ability to download key telemetry parameters in different working modes.

The invention discloses a satellite fault rapid positioning system based on bus monitoring; a bus communication main node is responsible for polling telemetry data, distributing, and broadcasting data scheduling transmission to a bus communication slave node and a bus monitoring module on the bus; the bus communication slave node is responsible for acquiring the telemetry data of the system, and polling, receiving and broadcasting the data in response to the telemetry data of the bus communication main node; the bus monitoring module is mainly responsible for receiving, formatting and storingall communication data on the bus; an order sent from the ground is transferred to the bus monitoring module through a ground order control; the bus monitoring data at an appointed position is sequentially sent to a data transmission system according to the content of the order by the bus monitoring module, and then transmitted to the ground by the data transmission system; or the bus monitoring data polling at the appointed position is performed on the bus through the ground order control, the bus monitoring data is packed and processed to form the satellite telemetry data packet to be sent to a responder which is used for transmitting the satellite telemetry data packet to the ground; and the ground device performs the fault positioning or extracts the concerned satellite telemetry dataaccording to the received bus monitoring data.

The invention belongs to the technical field of spaceflight, and discloses a universal satellite telemetry data processing system and method, and the system comprises a ground receiving station whichis used for receiving satellite telemetry data transmitted by satellite telemetry equipment; a ground station console which converts the satellite telemetry data into telemetry message information according to the user-defined application layer protocol; a telemetry data receiver which is used for analyzing the telemetry message information and storing the telemetry message information in the database server in a classified manner; And a web server end which is connected with the browser front end. According to the invention, through a user-defined application layer protocol, component information of different satellite models can be packaged into messages of a fixed format, so that the system can adapt to different satellite models in a self-adaptive manner, telemetry data of different satellites can be processed in a unified manner, and the system has universality for different satellite models.