scholarly journals A New Compensation Method for DRR of a Roll-Pitch Seeker Based on ESO

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Yue Li ◽  
Wei Li ◽  
Xiaodong Liu ◽  
Qunli Xia
Keyword(s):  
High Precision ◽  
High Speed ◽  
Rejection Rate ◽  
Compensation Method ◽  
Guidance System ◽  
New Method ◽  
Filter Method ◽  
Kalman Filter Method ◽  
Definition Of ◽  
Miss Distance

We propose a new DRR (Disturbance Rejection Rate) compensation method of a roll-pitch seeker based on ESO (extended state observer). The characteristics of a roll-pitch seeker and the DRR definition of two frames of a roll-pitch seeker are analyzed. The influence of different interference torques and different frequency bandwidths on the compensation effect is analyzed. Modeling and simulation of the guidance system of a roll-pitch seeker with the parasitic loop of DRR are carried out. Influence of the new DRR compensation method on dimensionless miss distance is analyzed. Mathematical simulation is established to compare the new ESO-based DRR compensation method with the existing methods such as the feedforward method and Kalman filter method. The analysis and simulation results show that the new ESO-based DRR compensation method has the advantages of high precision, good applicability, and easy adjustment, and the new method can effectively reduce the dimensionless miss distance with different types of input errors. The research of this proposed new method can provide a reference for the latest generation air-to-air missile operations in a high-altitude and high-speed environment and the high-precision research of a roll-pitch seeker.

METHODS FOR STACK ARCHITECTURE HARDWARE-COMPUTING DEVELOPMENT FOR HARSH ENVIRONMENT OF OPERATION

2018 ◽  
pp. 32-41
Author(s):  
A. P. Sorokin
Keyword(s):  
High Speed ◽  
Operating Conditions ◽  
New Method ◽  
Harsh Environment ◽  
Computing Platforms ◽  
Main Components ◽  
Definition Of ◽  
Industrial Standards ◽  
Processor Module

The article contains materials on the most common industrial standards for the design of components and heterogeneous hardwarecomputing platforms of four architectures that define the requirements and methods for connecting the main components of the platform to each other. The new proposed method for designing protected hardware-computing platforms of the new StackPC architecture is considered in detail. The main advantages of the new app manufacturability roach and the scope of its application are described. Described new functionality that has become available for the stack architecture due to the introduction of the new high-speed StackPC-FPE stack connector, the stackable power connector and the definition of stack expansion in one direction (up from the processor module) to the standard. The trends in the development of the standard have been determined. A comparison of the new method with existing methods is presented. It is shown that the implementation of the proposed method allows the design of new modern platforms with preservation of the required indices of resistance to harsh operating conditions, as well as to increase manufacturability, productivity and expand the functionality.

A High Precision Dynamic Autocollimator

2005 ◽  
Vol 295-296 ◽  
pp. 337-342 ◽  
Author(s):  
M.Z. Shen ◽  
Shu Tao Liao
Keyword(s):  
High Precision ◽  
High Speed ◽  
Polynomial Interpolation ◽  
New Method ◽  
Calibration Data ◽  
Rotary Table ◽  
Compensation Algorithm ◽  
Measuring Accuracy

In order to increase the precision of a high speed dynamic autocollimator, which uses quadrate detector, we propose a new method to compensate the residual measuring errors. For this purpose, a multi-tooth rotary table with precision of 0.2 seconds of arc is used to calibrate the autocollimator. From the calibration data, a polynomial interpolation compensation algorithm is used. As a result, the measuring accuracy is increased to the order of 0.8 seconds of arc and the sampling speed is not affected.

A new method used for high speed pseudo-random code generating

2014 ◽  
Author(s):  
Zhanfeng Zhao ◽  
Dong Zhang ◽  
Zhiquan Zhou
Keyword(s):  
High Speed ◽  
New Method ◽  
Random Code

scholarly journals Performance evaluation of GPS / BDS combined single-point positioning based on RTKLIB

2020 ◽  
Vol 165 ◽  
pp. 03009
Author(s):  
Li Yan-yi ◽  
Huang Jin ◽  
Tang Ming-xiu
Keyword(s):  
Kalman Filter ◽  
Extended Kalman Filter ◽  
Single Point ◽  
Least Square Method ◽  
Least Square ◽  
Filter Method ◽  
Single System ◽  
Positioning Error ◽  
Dual Mode ◽  
Kalman Filter Method

In order to evaluate the performance of GPS / BDS, RTKLIB, an open-source software of GNSS, is used in this paper. In this paper, the least square method, the weighted least square method and the extended Kalman filter method are respectively applied to BDS / GPS single system for data solution. Then, the BDS system and GPS system are used for fusion positioning and the positioning results of the two systems are compared with that of the single system. Through the comparison of experiments, on the premise of using the extended Kalman filter method for positioning, when the GPS signal is not good, BDS data is introduced for dual-mode positioning, the positioning error in e direction is reduced by 36.97%, the positioning error in U direction is reduced by 22.95%, and the spatial positioning error is reduced by 16.01%, which further reflects the advantages of dual-mode positioning in improving a system robustness and reducing the error.

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