A correlational two-dimensional inertial navigation landing point accuracy evaluation method
An accuracy evaluation and inertial navigation technology, applied in the field of related two-dimensional inertial navigation landing point accuracy evaluation, can solve problems such as insufficient consideration, unreasonable, and inability to solve the problem of landing point accuracy evaluation.
Active Publication Date: 2020-02-14
BEIJING INST OF AEROSPACE CONTROL DEVICES
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, the circular probability error fall point accuracy evaluation method works better when the standard errors are equal, but when the standard errors are not equal, there is a large deviation in the circular probability error fall point accuracy evaluation method, which is not reasonable; the irrelevant two-dimensional fall point The point accuracy evaluation method does not fully consider the influence of the correlation coefficient. When there is mutual influence between the horizontal and vertical directions, it cannot solve the problem of point accuracy evaluation well.
It can be seen that neither the circular probability error landing point accuracy evaluation method nor the irrelevant two-dimensional landing point accuracy evaluation method can solve the problem of evaluating the inertial navigation landing point accuracy in the case of related two dimensions
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0045] In a missile landing accuracy assessment, collect 1000 actual landing positions, establish a Cartesian coordinate system with the predetermined target landing position as the origin (0,0), and determine the relative position of each actual landing point relative to the target. The horizontal position error and vertical position error of the landing position, to obtain 1000 horizontal position errors and 1000 vertical position errors.
[0046] Calculate the standard deviation α of the 1000 lateral position errors and the standard deviation β of the 1000 longitudinal position errors, and calculate the correlation coefficient ρ between the standard deviation α and the standard deviation β.
[0047] Calculate the horizontal error accuracy evaluation factor e according to the standard deviation α and the correlation coefficient ρ 1 , specifically, the lateral error accuracy evaluation factor e 1 The calculation formula is:
[0048]
[0049] Calculate the longitudinal er...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a precision assessment method for drop points of inertial navigation in related two dimensions. The method comprises the following steps: determining a transverse position error and a vertical position error between a practical drop point position and a target drop point position, obtaining the preset quantity of the transverse position errors and the preset quantity of the vertical position errors; calculating standard deviation alpha of the preset quantity of the transverse position errors and standard deviation beta of the preset quantity of the vertical position errors, calculating a correlation coefficient rho of the standard deviation alpha and the standard deviation beta; calculating a transverse error precision assessment factor e1 according to the standard deviation alpha and the correlation coefficient rho; calculating the transverse error precision assessment factor e2 according to the standard deviation beta and the correlation coefficient rho; and performing precision assessment on the drop points of inertial navigation according to e1 and e2. The method realizes a purpose of precision assessment of the drop points of inertial navigation under transverse and vertical related two dimensions.
Description
technical field [0001] The invention relates to an inertial navigation system accuracy evaluation technology, in particular to a related two-dimensional inertial navigation landing point accuracy evaluation method. Background technique [0002] At present, the measurement methods of inertial navigation placement accuracy include the circular error probability evaluation method CEP (Circular Error Probability) and the uncorrelated two-dimensional placement accuracy evaluation method. The circular probability error impact point accuracy evaluation method is a simple impact point accuracy evaluation method. It takes the theoretical position as the center of the circle, and the distance around the center of the circle containing 50% of the missile warhead impact point is the radius of the circle. An accuracy estimation circle is established to measure the impact point accuracy. to evaluate. The uncorrelated two-dimensional drop point accuracy evaluation method is improved on th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 魏宗康江麒
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES