Decoding system of biss-c protocol based on FPGA

Abstract

The invention discloses a decoding system of a biss-c protocol based on an FPGA, and belongs to the technical field of inertial navigation systems. The system comprises a BISS-C encoder used for providing a position request and clock information for an absolute encoder, providing position acquisition data synchronized with a clock signal after the clock signal is received, and providing the position acquisition data to a data acquisition module; the data acquisition module, which is used for receiving slo position data of a turntable and navigation data of an inertial system; an encoding module, which is used for encoding according to the position data and the navigation data received by the data acquisition module to obtain encoded data; and a decoding module, which is used for decoding the encoded data received from the encoding module to obtain decoded data. The system has important significance for improving the test quality of an inertial navigation system.

Description

technical field [0001] The invention relates to the technical field of inertial navigation system calibration, in particular to a decoding system based on FPGA-based biss-c protocol. Background technique [0002] The attitude accuracy of a high-precision inertial navigation system is a key indicator to measure its long-term navigation performance. Usually, before using high-precision inertial navigation, its accuracy must be evaluated. The attitude accuracy evaluation not only gives the attitude accuracy index of the high-precision inertial navigation system, but also provides a basis for the accuracy analysis of the weapon platform. Therefore, it is of great significance to establish a simulation test system to simulate the movement of the carrier and combine it with the vehicle test to improve the test quality of the inertial navigation system. The precision evaluation equipment commonly used at home and abroad is a high-precision turntable. Absolute encoders are common...

AI Technical Summary

Problems solved by technology

[0003] However, in the traditional accuracy evaluation test, the angle information of the turntable is sent to the user through the upper computer software of the turntable, and the time delay is difficult to estimate accurately

This leads to the difficulty of time synchronization between the attitude reference data output by the turntable and the attitude measurement information of the inertial navigation system.

Images