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To deal with the online inertial sensor quality evaluation problem of the inertial navigation system (INS) aided by global poisoning system (GPS), an evaluation function is proposed in the framework of optimal fault detection. As inertial sensors are vulnerable to ambient disturbances such as temperature change and vibration during the flight, the system model is reformulated considering the unknown...
Due to the fact that the traditional Kalman filtering has difficulties in determining dynamic noise and observation noise in the application of vehicular GPS dynamic positioning, an improved adaptive Kalman filter algorithm is put forward for GPS dynamic positioning in this paper. The proposed algorithm has the ability of making a real-time correction on the parameters of system noise, avoiding the...
In this paper, we study the optimal tracking performance problem of continuous-time linear multi-input multi-output (MIMO) networked control systems. The unstable and non-minimum phase systems is considered. The output feedback path is subject to quantization noise, additive white Gaussian noise and bandwidth constraints, and encoding and decoding are considered. The reference input is a random signal...
This paper analyzed the factor of bias drift of quartz vibratory gyroscope, proposed the method of improving bias stability of quartz vibratory gyroscope and designed an interface ASIC of quartz vibratory gyroscope. The bias instability is generated by characteristic of noise in the detecting circuit and the quantity of the driving single in the exciting circuit. We propose a sine-wave exciting circuit...
The gear mesh nonlinear characteristic is an important factor in planetary gearbox nonlinear study. However the gear meshing stiffness in many research papers is often calculated with formulas from handbooks. This kind of method is not reliable and accurate enough in the planetary gear box nonlinear characteristic study especially in the high speed transmission. The vibration and noise is becoming...
An enhanced chaos shift keying named FM-QACSK (Frequency Modulated Quadratrue Amplitude chaos shift keying) is presented in this paper by using a high-level signal constellation in the FM-QCSK (Frequency Modulated Quadratrue chaos shift keying) system This scheme improves the speed of chaos shift keying and its noise performance is better than other chaotic communication systems, such as DCSK and...
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