97 results about "Reflective memory" patented technology

A bi-directional reflective memory channel between a pair of storage controllers is used to maintain a mirrored copy of each storage controller's native buffer contents within the buffer of the other storage controller. To maintain such mirrored copies, buffer write operations that fall within a reflective memory segment of one storage controller are automatically reflected across this channel to the other storage controller for execution, and vice versa. The write operations are preferably transmitted across the reflective memory channel using a protocol that provides for error checking, acknowledgements, and retransmissions. This protocol is preferably implemented entirely in automated circuitry, so that the mirrored copies are maintained without any CPU intervention during error-free operation. When a failover occurs, the surviving storage controller uses the mirrored copy of the failed storage controller's native buffer contents to assume control over the failed storage controller's disk drives.

The system of the invention includes a method for monitoring changes in the status or condition of a Container using one or more monitoring units mounted to the Container. The monitoring units preferably include a power supply, sensors using reflective energy with programmable parameters, globally-unique sensor identification, recording capability on a timeline, long term memory and the ability to rebroadcast information on RFID radio technology. Programmable monitoring hardware in the monitoring unit detects significant changes in the sensor outputs as a triggering event. The programmable monitoring hardware includes memory for storing identification information for the Container. The sensors which can include conventional devices that detect various forms of energy including visible light, infrared light, magnetic fields, radio frequency energy and sound. In one embodiment, a monitoring unit is mounted inside a shipping Container suitable for long distance transport. The triggering event can be used for tamper detection security.

The invention discloses an HLA-based distributed simulation support platform and an implementation method thereof, which are designed to solve the defects of the conventional HLA distributed simulation system in terms of operating performance and communication flow. The HLA-based distributed simulation support platform comprises a high-performance computing cluster compatible RTI (Run-Time Infrastructure) system unit, a reflective memory network and a federate deployment module, and provides HLA interface specification-based service for a simulation model. The implementation method for the HLA-based distributed simulation support platform is as follows: an interface function library provides service requests for federates via an RTI ambassador process, and federate processes submit the requests to an RTI via an RTI ambassador; the federates are interconnected and interoperated in a local area network, and a local RTI server centrally carries out management and communication. The invention achieves the state that the whole simulation federates can coordinatively advance, and increases the efficiency of distributed simulation; and the reflective memory network accelerates data synchronization.

The invention discloses a collaborative fault simulation system of a high-speed train information control system. The collaborative fault simulation system adopts a mixed distributed simulation structure based on an HLA-RIT (high level architecture-run time infrastructure) and a reflective memory network and comprises a real-time simulation computer, a real-time simulation control network and system physical effect analog equipment, wherein the real-time simulation computer comprises a total control desk, a fault injection control desk and simulation computers of all systems; the real-time simulation control network mainly comprises a train bus and HLA-reflective memory network mixed simulation network; the physical effect analog equipment mainly comprises object equipment of all the systems, a dSACE real-time simulator, a simulation model, an interface conditioning board and an FIU (fault injection unit) and is used for simulating main element objects, abstract models and common faults in the high-speed train information control system. The system can provide safe and reliable fault injection/simulation/analog and testing for function verification of the high-speed train information control system and has higher applicability.

The invention discloses a relaying control method for a long-stator linear synchronous motor. The method comprises that: 1, a propulsion control system of an nth subarea fully controls a long stator, the propulsion control system of an (n+1)th subarea is on standby, and the propulsion control systems of adjacent subareas perform data synchronization by utilizing a reflective memory network; 2, the propulsion control system of the nth subarea half controls the long stator, and the propulsion control system of the (n+1)th subarea serves as an assistant; 3, the propulsion control system of the nth subarea assists in controlling the long stator, and the propulsion control system of the (n+1)th subarea half controls the long stator; and 4, the propulsion control system of the nth subarea is on standby, and the propulsion control system of the (n+1)th subarea fully controls the long stator. In the method, communication is established by adopting the reflective memory network, high speed, high real-time performance, electromagnetic interference resistance and high accuracy are ensured; the adjacent subareas synchronize data to ensure the consistency of control in the adjacent subareas; and control power is transferred step by step so as to avoid the current of a frequency converter unit being fluctuated in the transfer, ensure the continuity of propulsion forces of the propulsion control systems, maintain the stable running of a rotor and improve the system reliability.

A semi-physical simulation test system for sun-oriented control comprises a satellite-borne computer system, a gyro, an infrared horizon instrument, a star sensor, a three-axis magnetometer, an actuator and a target simulator. The target simulator simulates the space environment. A motion simulator simulates the attitude motion of an aircraft. The satellite-borne computer system performs attitude and control quantity calculation according to measurement data acquired by single measurement machines, and outputs the attitude and control quantity to the actuator. The semi-physical simulation test system further comprises a sun sensor equivalent device, a dynamic geomagnetic field simulator, a target simulator, a motion simulator, a PXI acquisition control computer, a dynamics simulator, a data distribution unit, a telemetry, remote control and remote injection machine, a database, a display terminal, a CAN bus network and an optical fiber reflective memory network. The problem that ground simulation verification of sun-oriented control cannot be carried out under abnormal attitude rolling of an aircraft in the prior art is solved. The semi-physical simulation test system has the beneficial effect that the test authenticity and effectiveness are improved.

A system includes multiple agents coupled to an optical bus for transmission of high speed signals and to an electrical bus for transmission of low speed signals. The agents can be memory modules, such as DIMMs. An optical connector housing for coupling the agent to the optical bus can include a reflective device such a mirror, a semi reflective mirror, a pellicle beamsplitter, or the like. The low speed signals can be, for example, power, ground, and supervisory signals. The high speed signals can be, for example, data, address, control, and clock signals.

The invention discloses a large data battlefield environment hardware-in-the-loop simulation system with air-space-ground integration, including a virtual battlefield simulation system, a hardware-in-the-loop simulation system and a bridge assembly; In a federated manner, the virtual battlefield simulation system and the subsystem of the hardware-in-the-loop simulation system are federated members. The RTI requests the service to join the federation, the bridge component uses the proxy federation member, and the hardware-in-the-loop simulation system is added with the fiber-optic reflective memory network. data nodes are arranged on the fiber-optic reflective memory network, the proxy federation member accesses the data node, and accesses the virtual battlefield simulation system through the RTI. The invention effectively connects the virtual simulation network with the semi-physical simulation real network, and constructs a comprehensive simulation system. The real application runningon the real device can participate in the virtual network in real time, by accessing the real network and the real node. Improve the fidelity of virtual simulation.

The invention belongs to aerospace measurement technology, and relates to a star sensor dynamic calibration device and a calibration method. The device of the present invention includes a single star simulator 1, a star sensor 3, a two-dimensional high-precision turntable 4, a data processing computer 5, a platform base 6 and a turntable control lower computer 9, and is characterized in that the data processing computer 5 is inserted with The reflective memory card A7 is inserted with the reflective memory card B8 on the lower computer 9 controlled by the turntable, and the two reflective memory cards A and B are connected by optical fibers to form a reflective memory real-time network. The calibration steps of the dynamic calibration method of the present invention are: static calibration; dynamic data collection; dynamic data processing. The system of the invention is simple in structure, easy to realize and low in cost; the real-time synchronization precision of data collection is relatively high; and the universality is good.

A clock synchronization method based on a PTP (Precision Time Protocol) and a reflective memory network relates to the technical field of virtual simulation tests. According to the invention, the problem of the existing communication method that the clock synchronization precision is low due to unstable network can be solved, and the clock synchronization method based on the PTP and the reflective memory network is provided. The method is applicable to the clock synchronization between a host and node equipment in a virtual simulation experiment. A reflective memory card is inserted into each of the host and the node equipment respectively, and the data transmission is carried out by a fiber between the reflective memory cards in the host and the node equipment. The method comprises the following steps: a main clock and a slave clock are constructed; an offset correction phase is carried out; the offset correction is repeated; an offset value is obtained by a data processing algorithm; an optimal fitting value is obtained; a delay correction phase is carried out; the relay correction is repeated; a delay value is obtained by the data processing algorithm; and an optimal fitting value is obtained to complete the synchronization of the main clock and the slave clock. The method is suitable for virtual simulation tests.

The invention relates to a double-rotary table semi-physical simulation system and method for a full strapdown missile guidance control system. A guide head, body sight simulation rotary tables, a target simulator, an inertia group, a missile-borne computer, a posture simulation rotary table, a steering gear, a steering gear loading system, a real-time master control simulation machine, a data acquisition computer and a reflective memory network are included; one rotary table is used for simulating the attitude motion, and the other rotary table is used for simulating motion of a missile relative to the body sight. By means of the system, two three-axis rotary tables are used for replacing five-axis rotary tables required during semi-physical simulation of a traditional full strapdown missile guidance control system, and the complexity and cost of the simulation platform are effectively reduced.

The invention discloses a high flux distributed type simulation support platform, a system and a simulation method based on the HLA, and is designed for large data amount simulation processing. The high flux distributed type simulation support platform based on the HLA includes that a runtime infrastructure (RTI) gateway and a RTI local process unit transmit data by calling a high flux data transmission control module. The high flux distributed type simulation support system comprises a reflective memory network and at least two simulation support platforms, wherein the reflection memory network comprises a multimode optical fiber and reflection memory cards connected with the simulation support platforms. The high flux distributed type simulation based on the HLA includes that internal interconnection and interoperation of federates are achieved through the reflection memory cards, and the reflection memory cards and the RTI gateway are connected by the reflection memory network to perform management and communication. The high flux distributed type simulation support platform, the system and the simulation method based on the HLA have the advantages of being applicable to simulation of big data high-speed transmission, low in delay, high in instantaneity, and rapid and reliable in data transmission.

The invention belongs to the aircraft control system field, and provides a control rule verification platform and a control rule verification method capable of configuring redundancy level. The control rule verification platform comprises a four-redundancy real-time simulation node, a software loading/system testing computer, an Ethernet network and a reflective memory network, wherein the four-redundancy real-time simulation node is composed of four embedded computers identical in function, performance, interface and composition, and runs a V*Work real-time operation system, data cross transmission is performed among the computers through a CCDL (cross channel data link), the CCDL further comprises a synchronous cable used for clock synchronization management among simulation nodes, and the four redundancy real-time simulation node runs a flight control system algorithm, and inputs and outputs data through a physical I/O (input/output) interface.

The invention provides a guidance control semi-physical simulation system timing method and a guidance control semi-physical simulation system timing system. The method comprises the steps of performing clock controlling by an RTX real-time operation system which is installed on a timing management test computer, and generating timely interruption of an RTX high-precision clock; performing broadcast interruption through a VMIC reflective memory network when counting time is up, writing a frame period counting value in a specific address of the VMIC reflective memory network, wherein the counting value is the number of time frames in a simulation experiment; after each system node computer receives the interception, reading the counting value of the frame period in the specific address of the VMIC reflective memory network, calculating a data reading address according to the frame period counting value, performing model resolving, and writing the result into the VMIC reflective memory network. The guidance control semi-physical simulation system timing method and the guidance control semi-physical simulation system timing system can settle problems of data synchronization and clock synchronization between nodes of an existing semi-physical simulation system.

The invention relates to the technical field of time and space consistency of a simulation node in semi-physical simulation and discloses an ultrahigh-precision timing method and device applied to a semi-physical simulation system. The devices employed in the method comprise time management computers, clients and center optical fiber HUBs. The time management computers are connected with upper ends of the center optical fiber HUBs through optical fibers. The lower ends of the center optical fiber HUBs are connected with clients through the optical fibers. The middle ends of the center optical fiber HUBs of adjacent subsystems are connected through the optical fibers. According to the method and the device, network timing is carried out on each node device of the system through a reflective memory network, the difficulty that a massive semi-physical simulation system is many in user nodes and dispersed in employment is overcome, the high timing of the massive semi-physical simulation system is ensured, and the timing precision reaches a microsecond level. The designed timing device is simple in structure and low in development and maintenance cost, and is convenient for engineering realization.

A node has at least one memory module comprising at least one reflective memory region configured to reflect at least one reflective memory region of one or more other nodes, and the node and the one or more other nodes being configured to communicate on a packet-based serial point-to-point topology network. The node also comprises at least one network switch configured to provide at least two links each configured to connect to at least one non-host peer node on the network, multicast to the one or more other nodes at least one change to the at least one reflective memory region, receive from the one or more other nodes at least one other change to the at least one reflective memory region, and communicate to the at least one memory module the received at least one other change to the at least one reflective memory region.

The invention discloses a multidisciplinary co-simulation realization method based on a reflective memory network. The method comprises the steps that multidisciplinary simulation system demand description is performed; IOCE model description is performed; an IOCE model is realized; and data management and general control management are performed, wherein the IOCE model contains input, output, calculation and events and is triggered by a certain message to generate an event response under a certain external or internal input condition, calculation is performed according to the response, and a result is output. Through the multidisciplinary co-simulation realization method, the problems that a traditional complex weapon system is long in simulation running consumed time in a digital simulation process, disciplinary models cannot be coupled, and a simulation result is low in confidence are solved, and quasi-real-time high-precision multidisciplinary co-simulation is realized.

The invention provides a real-time simulation communication system and method. The real-time of real-time simulation capability and data interaction can be enhanced by the implementing of distributedsimulation based on a reflective memory network. The system includes a simulation main control computer, simulation servers and general interface simulators, wherein the simulation main control computer controls the testing of the distributed simulation and the operation status of simulation; the simulation servers operate different equipment simulation models; one end of each general interface simulator is connected to to-be-detected equipment, and the data interaction of the other end of each general interface simulator and the simulation servers and the to-be-detected equipment can be realized through reflective memory cards; and the reflective memory cards are installed on the simulation main control computer, the simulation servers and the general interface simulators, the connectionof the reflective memory cards can be achieved by optical fibers, and therefore, the star shaped reflective memory network can be formed. According to the technical scheme, the transmission efficiencyof real-time communication data can be enhanced, the delay and unpredictability of data transmission can be reduced, communication protocols are simplified so that the communication efficiency can beenhanced, transmission distances are increased so that the transmission speed can be enhanced, and at the same time, programming can be simplified, and the difficulty of development can be reduced.

The invention discloses a multi-node automatic memory allocation method based on a reflective memory network. The method comprises the steps that the reflective memory network is established; (2) one node in the reflective memory network is appointed to be a master control node, all node data structures in the reflective memory network are defined in the master control node; (3) all nodes are started, and an interrupt 1 and an interrupt 2 of each node are made to play roles; (4) the master control node sends handshake information to other child nodes, connection is established between the master control node and the child nodes, and the child nodes receive the handshake information through the interrupt 1; (5) after the child nodes receive the handshake information, the memory data needed by the child nodes are returned to the master control node; (6) the master control node conducts statistics on the number of the child nodes in the reflective memory network, memory allocation of the reflective memory network is conducted uniformly, and memory allocation results are stored to local memories; (7) the master control node informs all the child nodes to read the memory allocation result in the respective local memory through the interrupt 2; the master control node and the child nodes respectively conduct memory pointer mapping according to the memory allocation results, and automatic memory allocation is achieved.

A mechanical multi-frame RF/infrared composite interference semi-physical simulation system includes a microwave anechoic chamber, a three-axle table, a table control system, a RF interference simulator, an infrared interference simulator, a mechanical multi-frame moving system, a servo system, and an integral real-time simulation control system. The three-axle table, the table control system, the RF interference simulator, the infrared interference simulator, and the mechanical multi-frame moving system are arranged inside the microwave anechoic chamber, and the integral real-time simulation control system is arranged outside the microwave anechoic chamber. The RF interference simulator and the infrared interference simulator are mounted on a moving platform of the mechanical multi-frame moving system. The integral real-time simulation control system is composed of a multi-node real-time computer network including a master control computer, an acquisition computer, a RF interference control system, an infrared interference control system, a real-time communication network, a simulative master control system and a monitoring system. The real-time communication network is built up by the utilization of reflective memory networking, and information transmission and real-time control among devices of the simulation system are realized.

The invention provides a data storage and distribution system of a hardware-in-the-loop radar simulation system. The data storage and distribution system of the hardware-in-the-loop radar simulation system comprises a bulk-storage memory board and reflective memory cards; the bulk-storage memory board and a radar signal processor of the hardware-in-the-loop radar simulation system are together inserted into one compact peripheral component interconnect (CPCI) case and mutually connected through low voltage differential signaling (LVDS) cables, and the reflective memory cards are combined with a computer main board through PMC ports and mutually connected with other reflective memory cards through optical fibers; the hardware-in-the-loop radar simulation system can simulate a specific system radar under laboratory conditions, test data that are output by the radar signal processor are real-timely stored to the bulk-storage memory board in the test process, meanwhile, the test data are real-timely reported to the reflective memory cards, and processed results are real-timely distributed to a radar efficiency simulation evaluation unit by means of the reflective memory cards. By means of the data storage and distribution system of the hardware-in-the-loop radar simulation system, the problem that large quantities of test data can not be real-timely stored in pre-stage test can be solved, and meanwhile, real-time sharing and transmission of data among all nodes in network can be achieved by means of topological structures of reflective memories.

The invention provides a multi-source detection semi-physical simulation and time window analysis system. The system comprises an upper computer, an Ethernet router, a comprehensive control system, a dynamics/kinematics simulation machine, a ground-based beyond visual range radar simulation machine, a space-based satellite detection simulation machine, a simulation radiation source, a quantity of passive radar, a GPS tame rubidium clock, a multi-station collaborative signal processor, a real-time reflective memory network, a direct-current voltage-stabilized power supply and a UPS power supply. The system is based on the real-time reflective memory network and an Ethernet network, a mathematical simulation and radio frequency simulation combination real-time system architecture is adopted, combination properties of the multi-source detection system can be effectively verified, simulated analysis can be carried out on a target indication time window, and thus technological support can be provided for target guidance system argument of an aircraft.