Momentum wheel is the key mechanical component for attitude control and accuracy maintenance of spacecraft such as satellite. Its micro-vibration seriously affects attitude stability and imaging accuracy of satellite. The non-uniform, non-continous geometric configuration and rotational effects will...

For improving the braking synchronization performance of tractor and travel trailer during braking, a braking coordination control method based on longitudinal hook force estimation is proposed. Based on the analysis of the straight-line braking kinematics characteristics of the tractor-travel trail...

A geometric optimization algorithm is proposed based on velocity obstacle method to solve the problem of flight collision resolution and track recovery. We gave a rigorous mathematical description of the problem. Firstly, according to the relative position and speed relationship between the aircraft...

In view of the complicated system structure of current weapon equipment, the existing testability verification method based on the testability prior information of the equipment system is difficult to apply, and the testability verification method based on the testability prior information of the su...

The cylinder block is the crucial part of the aviation piston pump, which can directly affect the function of aviation piston pump. In view of the drawbacks of long test period and lacking theoretical approaches, a method for fatigue analysis and life prediction of the cylinder block is proposed bas...

With the rapid development of graphic processing unit (GPU), the parallel computing technology could be easily applied in the numerical simulation of ultrasonic sound field based on compute unified device architecture (CUDA). The calculating efficiency could be greatly promoted by using the parallel...

Anomaly events detection (AED) is quite important in space field for the complex space environment, difficult technology, high risk and strictly safe and reliable requirements. Since there are few space anomaly events samples and they are hard to obtain, it is necessary to carry out targeted AED. In...

Nonlinear problem has always been an obstacle in dynamic analysis domain due to its complexity and high computational cost. This paper aims to present a simple, accurate and efficient nonlinear modal analysis method which can be applied to some common nonlinear systems, including Duffing system, dry...

To solve the instability of the path planning system caused by vehicle driving data loss and lag, a novel real-time regional path decision method based on the cooperative vehicle infrastructure system (CVIS) was presented in this paper. Firstly, the current road section resistance value was calculat...

The drive-control modes of multi-phase permanent magnet synchronous motor (PMSM) consist of the redundant mode and fault-tolerant mode. To research the difference of multi-phase PMSM performance caused by drive-control modes, a redundant PMSM system and a fault-tolerant PMSM system are built respect...

In order to curb kernel matrix expansion and track the time-varying dynamic characteristics when kernel extreme learning machine (KELM) is applied to online condition prediction, a sparse KELM online prediction algorithm with forgetting factor is proposed. By introducing forgetting factor, a new obj...

The moment-tensor inversion method utilizes acoustic-emission signal to obtain cracking information and is regarded as an effective tool to monitor the dynamic growth of cracks. However, in engineering practices, the signal, got by sensors, is always contaminated by noise. The noise will reduce mome...

A new second-order sliding-mode guidance law with finite time stability is proposed for the design of the guidance law of surface-to-air missile attacking maneuvering target. Based on the relative motion model of the missile and the target, guidance problem is transformed into control problem of fir...

In order to improve the accuracy of service modeling and combinatorial optimal-selection in cloud manufacturing, a multi-level modeling methodology is proposed to describe manufacturing services, which subdivided the service into three fine-grained levels:resource service, function service and proce...

In the application of global navigation satellite system (GNSS) common view (CV) technology, the simulation of the GNSS CV signal is needed to reduce the cost of testing the CV receiver and the CV algorithm. For this reason, a channel multiplexing method of signal simulation of GNSS CV signal is pro...

During the return progress of the detector from the extraterrestrial celestial body after sampling, the ascent engine plume flows back to the ascender after the reflection from the launching pad upper surface, which causes aerodynamic effect and disturbing torque effect on the ascender. Numerical si...

As a kind of new inertial navigation system, the hybrid inertial navigation system has the characteristics of three-axis physical platform, strapdown attitude algorithm and installed self-calibration. Based on these characteristics and in order to improve the accuracy of hybrid inertial navigation s...

A new maneuvering group target tracking algorithm based on adaptive correlation gate for solving measurement loss and increasing estimation error of centroid group tracking (CGT) algorithm when tracking maneuvering group target in clutter is proposed in this paper. First, CGT algorithm is combined w...

In order to achieve the control of a class of nonlinear systems in feedback form, the system is studied. First, according to LaSalle's invariance principle, the convergence of a class of autonomous systems is proved. The error function is introduced, and the Lyapunov function of the error function i...

To solve the problem that the random error of the measurement data in the cavity transient heat transfer test is amplified by the differential process of data processing, the influence of random measurement error on the heat transfer characteristics is quantitatively analyzed, and the suppression me...

The ballistic target will cause superposition and folding of the micro-Doppler curve when moving in the midcourse at high speed, the traditional translation compensation method is not suitable for ballistic target translation compensation. After analyzing the frequency characteristics of each scatte...

Aimed at the shortcomings of the existing data downlink mechanisms for low earth orbit (LEO) remote sensing satellite, such as low effiency, high delay and vulnerable transmission path, a new remote sensing data transmission mechanism was proposed. In the proposed mechanism, earth stations were supp...

The effects of impact loading on the failure of cement concrete pavement are significantly different from those of traffic loading. This paper investigates the characterization of cement concrete pavement with varied initial crack length and location under impact loading. It is found that the final ...

A full life cycle evaluation model of compressed natural gas (CNG)/gasoline bi-fuel passenger vehicle has been established based on GaBi software, which is adopted to analyze the energy consumption and emission of the bi-fuel vehicle from the raw material acquirement phase to the scrap recycling pha...