Three tracking algorithms are discussed in chapter three: the IMM algorithm, the reweighed interacting multiple model (RIMM) algorithm and the interacting acceleration compensation (IAC) algorithm.
A generalized interactive acceleration compensation (IAC) algorithm in mixed coordinate is presented. Considering the range rate measurement provided by Doppler radar,through changing measurement equation in spherical coordinate,the estimation accuracy is improved.
The influence of acceleration on parameter measurements of CW radar is analyzed,a new real-time acceleration correction algorithm based on partial dechirping for CW radar is introduced,its principles and computional costs are discussed in details.
The algorithm is also comapred with acceleration correction algorithm based on total dechirping,with the results that when SNR is met,it attains almost the same effects as the total acceleration correction algotithm,while its computional costs are much lower.
To deal with high-speed maneuvering target and to improve the tracking accuracy of radar, it is necessary to introduce a computer velocity-acceleration compensation loop into the servo system of radar.
In order to improve the radar maximal unambiguous range and acceleration, a good method is introduced, which is based on the principle of dual-frequency continuous wave radar ranging.
On he basis of analysis of the original cantilever type transducer measuring smaller force, a transducer structure with acceleration compensating beam is presented.
In order to improve precision, combining with the project realization of Pulse-Doppler radar, measuring velocity by Pulse-Doppler pulse cluster was advanced, by irradiating target time after time, using accumulation of pulse cluster to improve Signal-to-Noise ratio, using range gate-Doppler filter technique to measure the spectrum of target, then, compensating insert value and acceleration of Doppler frequency, achieving the accurate velocity information of target by conversion of frequency and velocity.
Calculation and spectra analysis of horizontal acceleration correction (HACC) for airborne gravimetry
On the basis of a sinusoidal model of the disturbed horizontal acceleration, the spectrum characteristics of misaligned angle and horizontal acceleration correction are analyzed.
In an airborne gravimetry test, the misaligned angle of platform and horizontal acceleration correction are calculated.
The basic principle of the approach is to insure the object center of mass acceleration correction and optimal force distribution using a linear programming method.
On he basis of analysis of the original cantilever type transducer measuring smaller force, a transducer structure with acceleration compensating beam is presented. The test results show that by this structure the working frequency bandwidth of the transducer is expanded and the dynamic measurement error reduced. This structure is simp e and practical
The celltripetal acceleration is a main factor disturbing the platform leve-ling or inertial navigation system alignment on the base that swings with largeangles. After engaging in research in the area of inertial navigation for about15 years, the first author has not yet found in the world's open literature anyeffective method for compensating for centripetal-acceleration disturbance forplatform on a swing base. Under unfavorable conditions, ships still require 24hr. alignment time and airplanes still require...
The celltripetal acceleration is a main factor disturbing the platform leve-ling or inertial navigation system alignment on the base that swings with largeangles. After engaging in research in the area of inertial navigation for about15 years, the first author has not yet found in the world's open literature anyeffective method for compensating for centripetal-acceleration disturbance forplatform on a swing base. Under unfavorable conditions, ships still require 24hr. alignment time and airplanes still require more than 10 minutes of align-ment time. Such alignment time requirements are evidently not satisfactory. This paper proposes a scheme for effectively compensating for centripetalacceleration disturbance. It is believed that the scheme is the first to use twokinds of signals--(1) swing angular rate of carrier and (2) platform attitudeangles--to compute the swing arm. Other detaile about the scheme are omittedfrom the abstract. The results of theoretical analysis and simulation calculations show that forswing angular rate=50°/s and for swing angle varying between-20°--+20°,the use of angular rate gyro with 0.1% error and the use of attitude anglesensor with error≯15′, can guarantee that the error of compensating for contri-petal acceleration disturbance be less than or equal to 1×10~(-4)g.
The paper gives the analysis of the dynamic features of piezoel-ectric dynamometer based on the dynamic theory.The mathematical model aboutthe dynamometer has been put up.The errors of the amplitude and the measuringwidth about the piezoelectric dynamometer have been deduced, and are comparedwith those about strain dynamometer. It is also pointed out Why the piezoelect-ctric dynamometer is of high dynamic measuring accuracy and partly of the fun-ction of measuring acceleration compensation.
加速度补偿
acceleration compensation
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