The convergence speed and the filtering precision are poor when the interactive multiple model (IMM) filtering algorithm is applied to track the anti-ship missile in S maneuver. Thus a fuzzy logic interactive multiple model (FLIMM) filtering algorithm is proposed by improving the model probability u...

Based on the objective reality of gradient potential existence in spacecraft surface caused by charged particles in space plasma environment in the orbiting spacecraft, discharge of spacecraft with surface charging or deep dielectric charging would be induced by debris or meteoroids impacting. In or...

For the compliant micro-motion mechanism with one input force, compliance describes the relation between output displacement and input force, and is an important performance index for the dynamic performance and positioning precision. For the one with many input forces, the relation equation between...

This paper proposed a failure-behavior-model based accelerated degradation test designing method for assessing the storage life of accelerometer for inertial navigation products, which determines test stress levels while lacking of the preliminary experimental data. On the basis of analyzing the pro...

For dust impact on machine vision of the probe landing in Mars, a method was brought forward to remove the effect of dust on optical image and provide clear input image for the visual system. First, a model was built for the dust image. Then, the values of the atmospheric light and the transmission ...

In the field of precision measurement and aerospace, atomic gyroscope and atomic magnetometer have high requirements on the uniformity of magnetic field, while the uniformity of magnetic field generated by the traditional Helmholtz coil is not good enough for these applications. To obtain better fie...

A distributed spherical simplex-radial cubature quadrature Kalman filter (DSSRCQKF) was proposed aiming at the coordinated navigation problem for cooperative target by multi-satellite on orbit. The spherical simplex rule and second-order Gauss-Laguerre quadrature rule were adopted to calculate the s...

The implicit solving approach of steady transonic flow field equals a Newton iteration for a nonlinear equation system. Globalization of Newton iteration is usually necessary in practice in order to fulfill the convergence requirement. In the framework of homogenous continuation, a Laplace operator ...

Magnetically suspended control and sensing gyroscope takes Lorentz force magnetic bearing (LFMB) as torquer to drive the rotor to tilt. As there is coupling between the two radial rotation degrees of freedom and it requires that rotor tilts with high precision and fast response, feedforward decoupli...

Path following control is one of the key technologies for unmanned surface vehicle (USV) to complete its mission, which is widely concerned by the field of motion control at home and abroad. In order to improve the accuracy and robustness of USV's path following control under the disturbance of the ...

Based on Timoshenko beam theory, this paper has analyzed the dynamic properties when a clamped beam subjected to step load and moving load respectively. In addition, K-V damping model is considered to study the influence of damping on dynamic performance of the system. To acquire the theoretical sol...

Aimed at the deterioration issue of gyroscope angular velocity measurement precision, which is caused by phase fluctuation noise of superfluid gyroscope, a gyroscope noise cancellation system based on recursive least square (RLS) algorithm was proposed. First, the phase detection model of superfluid...

Based on airworthiness requirements of civil airplane, a method for evaluating ground stability and control of crosswind landing based on digital virtual flight is established. With maximum bank angle of airframe and maximum lateral deviation during the landing roll-out as key parameters, and in acc...

The inflatable self-supporting boom, which is made of laminated aluminum film and local discrete self-supporting thin shell, has the ability to support the effective load at zero inner pressure. In order to improve the accuracy predicting the vibration characteristics of the inflatable self-supporti...

In order to improve the dynamic adaptability of reservoir, overcome the ill-posed problems of output weights in echo state network (ESN), and balance the fitting and generalization ability, a fault diagnosis model of plasticity echo state network based on L_1/2-norm regularization is presented. BCM r...

Considering the entire skin coating of aerostat envelop materials as one material, the effect of absorption and emission rate of aerostat envelop materials on helium temperature differences between day and night is investigated. In order to further reduce helium temperature differences between day a...

In order to improve the anti-amplitude-modulation (AM)-jamming, anti-frequency-modulation (FM)-jamming and anti-sweep-jamming performance of FM fuze, a harmonic timing sequence detection anti-jamming method is proposed using the timing sequence characteristics of harmonics during the projectile-targ...

Aimed at the maneuvering penetration and precision strike problem of hypersonic vehicle terminal trajectory, an optimal maneuvering trajectory optimization method considering the dynamic characteristics of intercepting was proposed from the viewpoint of optimal control, so as to obtain the maximum m...

In order to meet the demand of honeycomb structure perfusion of large spacecraft, a novel hybrid perfusion robot is proposed. This article mainly focuses on the analysis of the parallel mechanism. First, the kinematics analysis of 3PSS-PU parallel mechanism is conducted, and the inverse kinematic mo...

With the continuous increasing of flight density, the aviation safety in low altitude has caused extensive concern. Low-altitude environment is complex, and ground obstacles and weather have more significant impact on low-altitude flight than commercial aviation. Traditional traffic alert and collis...

Regarding the deficiencies of bispectrum with big data and high dimension in signal feature extraction and recognition, a method combining bispectra diagonal slice (BDS) with generalized dimension (GD) was proposed. First, BDS was used to reduce data volume and GD in the multi-fractal theory was tak...

Through the analysis on structure characteristics and work principle of bus-based embryonic electronic array (BBEEA), the multi-state system theory is introduced to the reliability analysis of BBEEA, and the universal generating function (UGF) was used to model and analyze BBEEA reliability. Compare...

In order to achieve salvo attack for large heading errors with integrated time, an impact time control guidance (ITCG) law for large heading errors is proposed based on equivalent sliding mode control theory and Lyapunov stability theorem by adopting the nonlinear guidance equation and the time-to-g...

The soft landing stability will be greatly reduced if the main engine of planetary explorer fails to shut down timely. In order to avoid this reduction, a new shutdown mode is introduced to serve as a remedy where engine is shut down at touchdown. The dynamic model of the explorer equiped with novel...

Through the fault diagnosis of aero-engine, the working status of each component can be correctly judged, and the maintenance program can be determined quickly to ensure the safety of flight. Based on the combination of deep belief network and decision fusion theory, the fault fusion diagnosis model...

In this paper, the effect of variant transshipment strategies on expected backorders (EBO) of a three-site inventory system is researched. Based on the predefined assumptions and inventory control strategy, as well as the consumption and replenishment process of the spares, the state equations of sp...

Zero-velocity update (ZUPT) algorithm is imported to calibrate device's cumulative error in traditional inertial navigation system (INS) which is based on micro-electro-mechanical system inertial mea-surement unit (MEMS-IMU). The positioning accuracy will be reduced when the movement trajectory of i...

The identification of branch, motion defect and range of motion of the planar six-bar linkages with sliding pairs is an important indicator for motion characteristics of linkages. Firstly, this paper divides the planar six-bar linkages with two sliding pairs or three sliding pairs into four-bar chai...