To study the compressive mechanical properties of hydroxyl-terminated polybutadiene (HTPB) propellant at high strain rates (700–1900/s) and low temperatures (−50 °C to 25 °C), we conducted a dynamic experiment using cylindrical specimens on split Hopkinson pressure bar (SHPB). In addition, scanning electron microscopy was employed observe fracture surfaces. The experimental results indicate effectiveness proposed SHPB testing for HTPB propellant. effects rate temperature remarkably...

Weapon‐target assignment (WTA) is critical to command and decision making in modern battlefields a typical nondeterministic polynomial complete problem. To solve WTA problems with multiple optimization objectives, multipopulation coevolution‐based multiobjective particle swarm (MOPSO) algorithm proposed realize the rapid search for globally optimal solution. The constructs master‐slave population coevolution model. Each slave corresponds an objective function used noninferior solutions....

Key ground targets and target attacking weapon types are complex diverse; thus, the weapon‐target allocation (WTA) problem has long been a great challenge but not yet adequately addressed. A timely reasonable WTA scheme only helps to seize fleeting combat opportunity also optimizes use of weaponry resources achieve maximum battlefield benefits at lowest cost. In this study, we constructed (GTA‐WTA) model designed genetic algorithm‐based variable value control method address issue that some...

With the development of times, problem mechanical failures in bearings has gradually become prominent. If this cannot be solved, it would cause significant safety hazards, so new technologies are needed to solve problem. The research article was an analysis bearing fault diagnosis method based on improved PSO (Particle Swarm optimization) algorithm, which aimed improve accuracy by using algorithm. This tested algorithm through experiments, with a maximum 85% and minimum 80%. traditional as...

Frequency agility is a promising technique for addressing the threat of mainlobe jamming in modern electronic warfare. This paper investigates confrontation between subpulse-level frequency agile radar and smart jammer from game theory perspective. The interaction process two sides modeled as two-player zero-sum extensive form game, which can capture multi-stage highly competitive nature. To obtain optimal strategy presence jammer, we introduce Simultaneous Move Monte Carlo Tree Search...

The flight deck of an aircraft carrier is relatively vulnerable compared to its hull, as the damage some subsystems on may cause losing operational capability. Therefore, this work aims represent a simulative method for evaluating resistance deck's capability in condition that together with strike group and enemy uses anti-ship missiles cluster warheads attack. In simulations, susceptibility vulnerability guarantee resources are gained. Then, help closed queuing network, residual sortie...

This paper discusses the H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</sub> model reduction problem for linear continuous-time systems with pure state delay. Different from conventional entire-frequency approximation performance specification, finite-frequency norm was adopted in this paper, which is a more suitable index to characterize problems apriori known operating frequency range. Based on recently developed TDS GKYP (time delay...

For questions of joint angle control space manipulator, a method based on genetic algorithm PID self-tuning is proposed, which can improve the accuracy angle. We establish dynamic model manipulator and design controller, then using to tuning parameters, simulate in MATLAB. The result shows that performance improved, difficulties traditional parameter regulation be avoided by this method.

Aiming at shortcomings of depending on experiences and inferior computation accuracy brought by using linear interpolation to calculate fixed pressure burning temperature, a new method iteration was put forward. Moreover, the optimization model equilibrium ingredients formulated based method, sequential quadric programming rather than Lagrange multiplier used compute model. At last, numerical example given validate in this paper. Results make show that more perfect outcomes can be achieved...