1 Mbps serial communication bus to simulate traffic and controller overhead
MIL-STD-1553 is a military standard published by the United States Department of Defence that defines the mechanical, electrical and functional characteristics of a serial data bus. A MIL-STD-1553 multiplex data bus consists of a bus controller (BC) controlling multiple Remote Terminals (RT) all connected together by a data bus providing a single data path between the BC and the associated RTs. There may also be one or more Bus Monitors (BM). However, BM is specifically not allowed to take part in data transfers and are only used to capture or record data for analysis.
VisualSim 1553B library provides the only industrial simulation of this Standard. Using this library, users can identify performance bottlenecks in the software execution, data loss issues and network topology errors. The protocol can be combined with hardware architecture blocks to define the behaviour of the Remote Terminals.
The VisualSim model of a 1553B network can be used to validate the performance and behaviour of the software tasks executing in triggered sequence across multiple RT and evaluate the latency to complete the end-to-end tasks.
The model can be used to introduce faults and test the responsiveness of the software diagnostics.
The library blocks have been designed for use with avionics and spacecraft on-board data handling (OBDH) subsystems for both military and civil.
It features a dual redundant balanced line physical layer, a (differential) network interface, time-division multiplexing, half-duplex command/ response protocol, and can handle up to 31 remote terminals (devices).
Optical cabling details can be entered to support MIL-STD-1773. The protocol can support multi-level network topologies and integration with other avionics protocols. The Remote Terminals can be assembled using a combination of the hardware architecture and the software model associated with each RT.
The 1553B network takes care of all the data communication.
Using this, designers of rockets and spacecraft systems can design the bus architecture to support the required onboard applications.
VisualSim 1553B library provides extensive statistics including End-to-end latency, 1553B Bus Latency Histogram, Packet Histogram, 1553B Bus Throughput, Rejects plot, Datalink Statistics and 1553B Bus Statistics for buffer occupancy and waiting time at the RT, and the utilization of the 1553B bus controller.
1553B Library contains:
The protocol can support multi-level network topologies and integration with other avionics protocols. The Remote Terminals can be assembled using a combination of the hardware architecture and the software model associated with each RT. The 1553B network takes care of all the data communication. Using this, designers of rockets and spacecraft systems can design the bus architecture to support the required on-board applications.