Traditional obstacle avoidance algorithms usually use a single shallow application, such as sensor-based distance measurement or some logic judgment algorithm, which leads to problems the need manually adjust parameters first, inability recognize complex unknown environments, and recognition errors caused by significant noise errors. Therefore, overcome these limitations, this paper combines convolutional neural network algorithms. A model of method based on established in paper, puts...

By analyzing the support of load-carrying rolling elements when fall into fault position, dynamics model a bearing variable stiffness system with local faults is proposed, considering retention factor contact deformation. Then, this paper researches change effective stiffness, deformation, force, and total elements. The results show that abruptly decreases position. deformation force in load zone increase, rebalancing external radial while causing sudden reduction resulting vibration system....

Techniques from the perturbation method, Edgeworth series, reliability-based design theory, and sensitivity analysis approach are employed to present a practical efficient method for reliability of automobile components with arbitrary distribution parameters. On condition first four moments original random variables known, theory case studies researched. The respective program can be used obtain parameters accurately quickly.

This work proposes a novel liquid-cooling system that employs the phase change material (PCM) emulsion as coolant for battery pack. To compare proposed scheme with traditional water cooling system, thermal model is developed pack systems, where start-stop control and time hysteresis phenomenon are considered in simulations. The results show either increasing inlet velocity or temperature improves uniformity two schemes, but it enlarges pumping energy consumption during whole discharging...

Coupling electromechanical cell-based smoothed finite element method (CSFEM) with the asymptotic homogenization (AHM) is presented to overcome overstiffness of FEM. This could accurately simulate dynamic responses and coupling effects piezoelectric composite material (PCM) structures. Firstly, efficient performances for active compounds round cross-section fibers are calculated based on AHM. Secondly, in CSFEM, multi-physic-field FEM coupled gradient smoothing technique. CSFEM returns nearly...

Stress concentration damage is one of the most troublesome problems in practical engineering structures. In order to reduce damage, it very important determine stress factors accurately. An artificial neural network (NN) technique has been used this article simulate relationship between basic random variables and factors, explicit expression can be obtained directly. The reliability theory have combined solve structural problems; then, corresponding methods analysis optimization design presented.

<title>Abstract</title> A variable-section design for hyper-redundant robots is proposed in this paper. In industrial development, especially the aerospace industry, nuclear and medical field, where traditional rigid linkage are not sufficiently adapted to working environment such as narrow complex space high-risk space, stiffness of with equal cross-section insufficient. aim solve problem, a robot using variable method decoupled motion control The simulation results show that section has...

<ns4:p>Background Colonoscopy is the best choice for detecting bowel cancer; its effectiveness and early screening can significantly reduce incidence rate of cancer. However, existing colonoscopy procedure very technically demanding doctors painful patients due to difficult maneuver long slender colonoscope inside human colon. This paper will be focused on designing flexible robots with high dexterity improve performance current colonoscopy. Methods article optimizes simulates shape layout...

In alloy bar rolling by Round-Oval pass sequence, the critical point on contact boundary is solved and cross-section profile parameter of outgoing workpiece represented, then equivalent height mean roll radius at exit section derived to correct spread formula. Based initial calculated modified Shinokura Takai formula, an iterative model for prediction in built improve accuracy prediction. The GCr15 experiment has examined validity this model. Compared with experimental data, precise enough...

To study the response under impact load of carbon fiber reinforced composite materials that have excellent mechanical properties.Finite element analysis unidirectional plates was conducted unsymmetrical based on drop weight test. At macroscopic scale, a finite model built ANSYS/LS-DYNA, which took as unknown quantity. The considered different initial conditions, from aspects stress, strain, energy change and deformation degree plates. Finally, mathematical recovery partial established,...

Stress concentration damage is one of the most troublesome phenomena encountered in practical engineering structure. In order to reduce damage, it very important for stress factors determine arbitrarily and accurately. At present, more attention has been given problem concentration, modern structural reliability theory neural network technique have improved rapidly. But difficult be solved case concentration. Neural (NN) used this work simulate relationship between basic random variables...