31 results about "Time-Triggered Protocol" patented technology

The invention belongs to the field of flight control, and achieves a configuration scheme of an unmanned aerial vehicle (UAV) three redundancy flight control system (hereinafter referred to as a flight control system) architecture based on a TTP/C (Time-Triggered Protocol) bus. The architecture takes a high-performance digital three redundancy flight control computer (FMC) as a core control module, an external bus is formed by using the TTP/C bus based on time triggering, and the demanding requirements of an unmanned aerial vehicle for the flight control system are met. The architecture is beneficial for the unmanned aerial vehicle flight control system to develop in a highly reliable, real-time and open direction, and has a broad application space.

The invention relates to a network operating on a time triggered protocol using time slots, wherein at least two clusters are included in the network, each cluster includes at least a node. Further, it relates to a method for clock synchronization within a time triggered network. To provide a network and a method reducing the amount of time needed for aligning multiple communication clusters as much as possible it is proposed to provide a network operating on a time triggered protocol using time slots, wherein at least two clusters (A, B, X) are included in the network, each cluster (A, B, X) includes at least a node (11), wherein the node (11) includes a communication controller (15) having a node clock source (18) for determining a timing for the node (11), wherein the clusters (A, B, X) are connected to a coupling unit (10) having a clock alignment control logic (20) comprising a coupling unit clock source (21) which is more accurate than the node clock source (18), wherein the coupling unit clock source (21) is used for aligning the timing between the at least two clusters (A, B, X). Further it is proposed to provide a method for clock synchronization within a time triggered network using time slots, having at least two clusters (A, B, X), wherein each cluster includes at least one node (11), each node (11) comprises a node clock source (18) and a communication controller (15) and the clusters (A, B, X) are connected to a coupling unit (10) having a clock alignment control logic (20) comprising a coupling unit clock source (21) which is more accurate than the node clock source (18), the method comprising the steps of: monitoring the timing of the connected clusters (A, B, X) within the coupling unit (10); increasing or decreasing a cycle length of the timing within the clusters by use of the coupling unit clock source (21).

The present invention relates to a node in distributed communication system operating under a time triggered protocol, further it relates to distributed communication system and to a monitoring device coupled to such node of a communication system. To provide a node in a distributed communication system, a distributed communication system and a monitoring device increasing the error detection and reducing complexity for providing a high availability for systems which require a non 100% fail safe solution a node is proposed comprising: a communication controller (15) coupled to a receiving and a transmission path, a host (13) for performing an application, and a monitoring device (16) coupled at least to one of a transmission path of the communication controller (15), an interface (91) between communication controller (15) and the host (13), and to internal lines of the communication controller (15), wherein the monitoring device (16) is provided for evaluating information provided by the communication controller (15) to monitor at least one state of the communication controller (15), wherein in case of detecting a non-defined state the host (13) is informed for performing predetermined actions in respect to the state of the communication controller (15). Thereby, an easy cost reduced solution is provided adapted to detect a predetermined number of faults in a distributed communication system.

The invention discloses a TTP/C bus-based electronic controller and an FADEC system. Each of the two groups of functional units which are redundant to each other comprises multiple functional daughter boards and inter-board TTP/C buses, each functional daughterboard is integrated with a TTP/C bus controller and the TTP/C bus controllers are connected with the inter-board TTP/C buses, thus the data interaction among functional daughter boards is realized. According to the TTP/C bus-based electronic controller and the FADEC system, buses are adopted for data exchange among the boards, the wiring becomes easy, the interference among the boards is small and the processing burdens of computing and a control board are reduced; by adopting time-triggered protocol, broadband for various tasks can be assigned in real time, the reliability of the whole machine is increased and the design can be more flexible.

A communication system having a communication medium and at least two subscribers connected thereto is described; the communication system being designed for transmitting data among the subscribers via the communication medium in communication frames of communication cycles via a time-triggered protocol. To accelerate the start of the communication system before the actual data transmission, the communication system has a device for generating at least two different synchronization frames per communication cycle and per channel, in at least one of the subscribers, e.g., in the node AB. For example, the device is designed as two separate communication controllers per transmission channel. As an alternative, the device may also be designed as a simple logic circuit, a so-called application-specific standard product. For generating the at least two different synchronization frames per communication cycle, the subscriber is designed as an active star coupler of the communication system. Data transmission in the communication system is preferably performed using the FlexRay protocol.

This invention relates to a star coupler connected to a plurality of nodes within a network using a time triggered protocol on a time slot basis. The invention further relates to a network including a cluster having at least one node. Further, the invention relates to a method for communication between nodes within a network using a time trigger protocol. To provide a star coupler, which is able to increase the bandwidth and to communicate with low propagation delay for communicating the relevant data it is proposed to provide a star coupler (11) comprising a switch (12) having a plurality of input branches and output branches, wherein a switch controller (13) is provided for controlling the switch (12), further comprising means (14, 15) for deriving knowledge about the protocol timing, which knowledge is used for selectively forward data in a certain time slot to at least one predetermined output.

The invention discloses a time trigger type real-time simulation control system which comprises a target PC (personal computer) and TTC200 controllers connected with the target PC through a TTP (Time-Triggered Protocol) bus, wherein the TTC200 controllers exchange data with the target PC through the TTP bus, each TTC200 controller has rich I/O ports, each I/O port is provided with a driving circuit which can output 50-ampere current, and the I/O ports are connected with a control system to drive the control system to act. The time trigger type real-time simulation control system disclosed by the invention adopts the TTC200 controllers, the controllers are provided with the I/O ports, the I/O parts are provided with the driving circuits, and no extra I/O board card and driving circuit is needed, thus the problems of higher cost and inconvenience in use of the traditional dSPACE real-time simulation system, caused by needing a plurality of I/O board cards and additionally providing a driving circuit, are solved.

The invention provides a low time-delay time triggering network system and an optimization method. The method comprises steps that step 1, occupation applications are brought forward by multiple synchronization applications mounted on multiple single-core processors to a bus during arrival of a next self period; step 2, sequence determination of the occupation application of each synchronization application is carried out by the bus according to the set priority to acquire the data sending time of each synchronization application at a corresponding node ; and step 3, the time for forwarding the data from each node to the bus within a lowest common multiple period is recorded. Through the method, system end to end weight time-delay is substantially reduced, compared with a traditional method employing scheduling on the basis of an inherent period, a scheduling mode on the basis of the lowest common multiple period is employed, a system end to end weight time-delay sum can be reduced by 3.53%, and work efficiency of the bus employing a time triggering protocol is improved.

The present invention involves a distributed control system for controlling a steering movement of a vehicle. The system includes a driver interface assembly, a driver interface node having a first time-triggered protocol (TTP) processing system and a road wheel node having a second time-triggered protocol (TTP) processing system. The driver interface node having a first time-triggered protocol (TTP) processing system is coupled to the driver interface assembly, where the driver interface node receives steering wheel parameters from the driver interface assembly. The road wheel node having the second time triggered protocol (TTP) processing system is coupled to the driver interface node, where the road wheel node transmits sensor measurements from a vehicle to the driver interface node. The road wheel node generates an applied torque that adjusts a wheel of the vehicle.

The invention provides a time-triggered bus planning and scheduling method, and solves the problem that a traditional event-triggered communication bus or network planning and scheduling method does not consider the transmission characteristics of communication messages in a time domain and cannot be suitable for a bus system adopting a time-triggered communication mechanism. The time-triggered bus planning and scheduling method comprises the following steps: carrying out time-triggered protocol bus topology configuration, and setting TTP bus global parameters; configuring parameters of each node of the bus; planning and distributing corresponding relations between nodes and time slots, nodes, messages, time slots and TDMA periods, and sequentially finishing planning and arrangement of themessages on the nodes in different TDMA periods in a bus cluster period and planning and arrangement of the messages in the time slots in the TDMA periods; carrying out the parameter verification andschedulability analysis on the planning and scheduling scheme, verifying the rationality of bus parameter setting and the correctness of a scheduling table, acquiring configuration information of each node under the operation scheme after verification is passed, and carrying out graphical display and file output.

An anomaly detection device included in a communication network adopting a time-triggered protocol based on a time slot includes: a frame transceiver that receives frames; and an anomaly detector that detects an occurrence of an anomalous frame in accordance with a time slot among a plurality of time slots included in a cycle and the number of repeated cycles of the cycle for each frame. The anomaly detector detects an occurrence of an anomalous frame by verifying a statistic on the frames received while the cycle is repeated a predetermined number of times, which is at least once, against a rule indicating a reference range of the statistic.

The invention relates to a distributed motor drive control system. The distributed motor drive control system is characterized by comprising a speed controller, a signal detection module, N current control drive modules, a dual-redundancy time trigger protocol bus and an M-phase synchronous motor. By adopting multi-phase and multi-group independent drive control, when one winding or H bridge is broken, the fault range is only controlled K solenoids, so that the influence of the fault on the system is greatly reduced. The capacity requirement of each H bridge is reduced, comprehensive utilization of system layout is facilitated, distributed drive is achieved and the problem of low utilization rate of an inverter in a redundancy scheme is solved. The time trigger protocol bus is adopted as an internal communication bus, so that the distributed motor drive control system has the advantages of good determinacy, good instantaneity, high reliability and high efficiency, and fault diagnosis is facilitated, and N groups of current drive control are easy to synchronize. The reliability of key information detection and control system communication is further improved by partially adopting aredundancy technology.

The invention relates to a redundancy flight management computer synchronous debugging method based on an ARINC659 bus. The method is characterized in that a special synchronous debugging device is constructed to debug redundancy flight management computer airborne software based on the ARINC659 bus, and redundancy channels of a redundancy flight management computer are mutually independent and synchronous in operation, a real-time task is scheduled according to a time triggering protocol of a unified clock, and there is no independent clock; in the development and debugging process of airborne software of the redundancy flight management computer, synchronous operation and stop among redundancy channels must be guaranteed. The technology is already applied to the research and developmentprocess of flight management systems of multiple unmanned aerial vehicle models, and a good effect is achieved. Meanwhile, the technology can also be universally applied to the fields of other redundancy computers using ARINC659 backplane buses.

The invention discloses a method for sending a data frame of a TTP (Time-Triggered Protocol) format at a TTE (Time-Triggered Ethernet) sending end. The method comprises the following steps: step 1), performing split judgment on TTE message flow to be sent, and if the length of the TTE message flow is greater than the maximum message load of TTP configuration, executing step 2); otherwise, directly packaging the TTE message flow into a TTP non-fragmented format to be transmitted by a TTP bus; and step 2) sequentially reading application messages from the TTE message flow according to the maximum message load of TTP fragment frames, packaging the TTP fragment frames and transmitting the TTP fragment frames via the TTP bus. The method realizes a network communication connection function between the gigabit bandwidth TTE bus serving as an airborne backbone network and the 25-mega bandwidth TTP bus serving as an airborne branch network, and realizes a time-triggered architecture-based real unified network of an avionics system.

A secure star coupler in a communication network adopting a time-triggered protocol based on a time slot include: transceivers each of which is connected to one of branches and transmits and receives signals; a routing table holder that holds a predetermined rule indicating a correspondence between a time slot and a branch; and a router that routes a signal received from a first branch to another branch unless a no-transfer condition is satisfied. The no-transfer condition includes a condition that the predetermined rule is not followed by the first branch and a condition that routing of a signal received from a second branch different from the first branch has started in the time slot.

Disclosed are various embodiments for a cabin management system that increases data throughput and decreases transmission delay via at least two dual channel time-triggered bus. In one embodiment, the cabin management system comprises a cabin management controller for controlling the cabin management system and interfacing with a plurality of avionics of an aircraft. The cabin management system further comprises a plurality of equipment controllers for generically interfacing with the cabin equipment of the aircraft. Additionally, the dual channel time-triggered data buses transmit data between the cabin management controller and the cabin equipment controllers based on a time triggered protocol.