Method for designing digital filter applied in inertia device

A digital filter and inertial device technology, applied in the field of inertial navigation, can solve the problems of not considering the influence of amplitude attenuation signal accuracy and system accuracy, not considering the spectral characteristics of the inertial device signal, only considering the denoising effect and system bandwidth, etc. Achieve optimal or sub-optimal performance indicators, flexible parameter design, and satisfactory overall filtering performance
CN102055434AInactive Publication Date: 2011-05-11北京华力创通科技股份有限公司
1 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京华力创通科技股份有限公司
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a method for designing a digital filter applied in an inertia device. The method is characterized by comprising the following steps of: determining an amplitude attenuation allowable value according to the precision of the inertia device, determining a phase delay allowable value according to the performance index of a strap-down inertial navigation system, and determining certain technical parameters of the filter according to the actual signal power spectrum analysis of the inertia device; designing a reference analog filter, converting the reference analog filter into an infinite impulse response (IIR) digital filter by using a bilinear transform method, observing a bode diagram in the filter parameter adjusting process, and performing off-line simulation calculation according to the actually measured data; and performing judgment by using de-noising effect, common cutoff frequency, amplitude attenuation and phase delay as fuzzy variables and using fuzzy rules to optimize the integral performance index. The digital filter designed by using the method can effectively filter the noise in the inertia device, meanwhile, controls the amplitude attenuation and the phase delay in an allowable range, and ensures the precision of the signals.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field The present invention relates to signal processing technology in the field of inertial navigation, in particular to a design method of digital filters applied to inertial devices. Background technique In the application of inertial navigation, inertial devices (gyro and accelerometer) give the angular velocity and acceleration signals of the carrier in real time, and the attitude angle and position information of the carrier are obtained after the integral solution, which directly determines the navigation accuracy. The strapdown inertial navigation system with inertial devices as the core component has a wide range of applications in modern military, aviation, aerospace and other fields, and is of great significance to the defense industry. Inertial devices are precision instruments, with high accuracy and wide dynamic range, which determine the guidance accuracy of a weapon about 70%. In the strapdown inertial navigation system, the inertial device is directl...

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