With the present condition that there are errors in predicting transient response of cavity with single opening using the ideal adiabatic cavity model in the presence of heat transfer, a zero-dimensional transient modeling method applied to a single opening cavity with the consideration of the effec...

The thermal stability and heat sink of aviation fuel play an important role in the reliability, safety and performance of aircraft and engine. Two types of typical microalgae aviation fuel were investigated to assess thermal stability and heat sink by thermo-gravimetric-differential scanning calorim...

More and more composite structures containing active materials are applied to adaptive structures. The integration of active materials in structures has brought new characteristics but made the design more complicated. In this paper, the deformation of the active composite plate actuated by the macr...

For extracting fault impulse components embedded in the vibration signal with much noise and harmonics, an improved morphological filter algorithm called average combination difference morphological filter (ACDIF) is proposed on the basis of the four basic morphological operators. Then ACDIF is comb...

In order to explore the characteristics and mechanism of passenger travel behavior in the traffic system, the statistical analysis of the passenger travel pattern is studied based on the actual airport departure of the landside passenger travel data. It is found that the behavior of passenger gather...

With the development of global navigation satellite system reflected signals (GNSS-R), its application to sea ice detection has increased recently. The angular speed of BeiDou geostationary earth orbit (GEO) satellite is small and the angle of elevation varies for only 3-4 degrees. Therefore, the sp...

In order to permanently reduce the coupling vortices in film cooling, a novel step-shaped slot cooling geometry with tangential coolant ejection was introduced and its aerodynamic and cooling performance was numerically investigated. The effects of slot location at the suction and pressure side of a...

To deal with the guidance problem of missile for intercepting ground fixed targets, a three-dimensional finite-time sliding mode control based guidance law is proposed in this paper. It is proved by the Lyapunov theory that the guidance law can steer the missile to intercept target with the desired ...

With the aim of dynamic modeling of the climbing robot with dual-cavity structure and wheeled locomotion mechanism, an analytical dynamic model based on the Udwadia-Kalaba equation is established. The desired trajectory, which is regarded as constraints imposed on the system, is integrated into the ...

The low-order equivalent methods are aimed at conventional aircraft. They are not suitable for aircraft with flying wings as a result of flying wings' new handing and stability characteristics. To improve the accuracy and success rate of low-order equivalent matching for aircraft with flying wings, ...

In view of hybrid uncertainty presentation and propagation considering the dissonance and imprecision of information in risk assessment, a hybrid uncertainty analysis method based on variable step discrete random set theory was proposed. All kinds of incomplete and dissonant knowledge was represente...

A new hybrid algorithm which is based on quantum particle swarm optimization (QPSO) algorithm and Broyden quasi-Newton algorithm was proposed to reduce the effect of initial value selection on convergence speed and accuracy in solving the variable cycle engine (VCE) model. Firstly, based on the anal...

With the changes of use environment, the initial spares plan cannot meet the equipment support requirement when the equipment is disposed. Aimed at this situation, similarity system theory (SST) and Bayes method are introduced. According to the similarity system theory, the initial failure rate of s...

An experimental hydrostatic journal bearing intended for the reusable liquid rocket engine turbopump was designed and investigated through numerical calculation and experiments. The Reynolds equation for incompressible laminar fluid was numerically solved based on its linear characteristic and the s...

Owing to the relaxed static stability technology applied to the modern high-performance fighter aircraft, the design of an advanced flight control system is required to confirm its closed-loop system for an excellent dynamic property within the flight envelope. The ability of flight control system (...

As an important parameter of a force transducer, the inertia mass can reduce the measurement accuracy of a dynamic force unless it has been accurately estimated. To eliminate the ill-posedness of an calibration model of the inertia mass caused by parameter errors, a modified Monte Carlo calibration ...

In embryonics array, testing architecture and the fault detection and location method are limited by the electronic cell structure and the array structure. Fault detection and location capability need to be improved, and the hardware consumption of the testing architecture is large. In order to solv...

Asymmetric factors lead to lateral-directional departure after catapult launch, and affect longitudinal flyaway characteristics as well. Principle analysis and numerical simulation are conducted to reveal yawing movement characteristics during deck run and lateral-directional departure characteristi...

Considering maneuvering spacecraft with high flexible appendages, the translational and rotational coupling vibration modes between flexible structures and center rigid body are excited by the simultaneous attitude and orbit maneuvering. Aimed at higher stability of attitude and orbit control of spa...

From the perspective of shore-based application, a marine oil spill detection model based on the inversion of the target water's relative dielectric constant was established using the three-antenna global navigation satellite system-reflection (GNSS-R) technology, the partial depolarization phenomen...

In order to improve the stability of working platform in the process of obstacle negotiation, with balancing-arm mobile robot as research object, an attitude control algorithm was designed based on nonlinear programming genetic algorithm. First, the simplified model of balancing-arm mechanism was bu...

In the case of short-range high squint imaging, the conventional range migration (RM) algorithm cannot be adopted directly, for the reason that the spatial spectrum will shift in the limited spatial spectrum domain and will cause warping and aliasing several times. In order to solve this problem, an...

The traditional reliability evaluation methods only consider the product under constant stress. However, products are often directly exposed to the outdoor natural environment in actual engineering, and the working environment stress or storage environment stress varies with time. Aimed to solve thi...