3 results about "GPS/INS" patented technology

The invention discloses a multi-mode airborne aviation communication navigation monitoring comprehensive simulation system and method, and the system takes a main control module as a core processing center, and is responsible for data collection, instruction distribution, and parameter configuration and storage. The system integrates a VHF / UHF communication module, a DME navigation module, a monitoring module and a GPS / INS navigation module. Wherein the VHF / UHF communication module, the DME navigation module and the monitoring module all adopt a unified highly integrated hardware architecture, the core of the VHF / UHF communication module, the DME navigation module and the monitoring module is a signal processor integrated with an FPGA and a DSP and a chip with analog-to-digital / digital-to-analog conversion and radio frequency transceiving functions, and the VHF / UHF communication module, the DME navigation module and the monitoring module are respectively connected with a UV antenna, a DME antenna and a monitoring antenna; and the GPS / INS navigation module is connected with the GPS antenna. The system integrates communication, navigation and monitoring functions through a highly integrated unified hardware architecture, solves the problems that traditional equipment is discrete and poor in collaboration, and improves the test efficiency and reliability.

The invention discloses a low-cost intelligent terminal satellite and inertial integrated precise point positioning method and device, and belongs to the technical field of navigation positioning. The method comprises the following steps: aiming at the problem that the pseudo-range inter-frequency deviation of the low-cost terminal is large and gradually varied, carrying out deviation estimation and correction by adopting a semi-parameter estimation and compensation least square method; for observation value abnormity and deletion, RAIM and LSTM are fused to construct an early warning-recovery-verification closed loop mechanism; aiming at a dual-frequency and single-frequency observation value coexistence scene, a mixed ionosphere delay processing strategy is adopted, and differential correction is realized through ionosphere elimination combination and GIM constraint; aiming at the problem of combination switching lag, constructing a fuzzy-neural network adaptive decision model, and dynamically selecting a GNSS / INS combination mode based on multi-dimensional features; and position parameter estimation and post-processing are realized through an integrated algorithm framework. According to the invention, high-precision and high-robustness precise point positioning is realized under the condition of low-cost hardware.

The invention belongs to the technical field of road traffic safety, and discloses an autonomous road traffic system vehicle rollover risk early warning method and system, and the method comprises the steps: collecting the kinetic parameters, road parameters and environmental parameters of an autonomous vehicle; based on GPS / INS positioning data, in combination with a roadside unit collaborative awareness technology, space-time synchronization and dynamic mapping of a vehicle planning track and road environment parameters are carried out, and a space-time coupling sequence used for rollover prediction is constructed; calculating a real-time rollover risk index according to the four-wheel load obtained by the data of the vehicle detector; according to the real-time rollover risk index, taking the kinetic parameters, the road parameters and the environmental parameters of the current vehicle as input, and adopting an extreme random tree algorithm to predict a rollover risk index value in a future preset time; and judging a rollover risk level according to the predicted rollover risk index value, and outputting early warning information for an autonomous road traffic system to perform safety control and path adjustment.