In recent years, multi-rotor unmanned aerial vehicles (UAV) have been widely applied for various applications; however, they are yet to be as commonly utilized in certain industrial transportation applications. Thus, this work designed and implemented a reference model-based integral sliding mode control (SMC) method the velocity controller of UAV. The was compared with an SMC scheme, then modeling robustness were verified. Finally, proposed six-rotor Three experiments involving...

Activity coefficients for the NaI + maltose water system at 298.15K were determined by an electrochemical method. The Gibbs energy interaction parameter (gES) and salting constant (kS) have also been calculated. Infinite dilution apparent molar volumes (VΦ,S) in aqueous solution those (VΦ,E) from density measurements as well volumetric parameters. results are discussed terms of structural model properties anions.

In the past few decades, drones have become lighter, with longer hang times, and exhibit more agile performance. To maximize their capabilities during flights in complex environments, researchers proposed various model-based perception, planning, control methods aimed at decomposing problem into modules collaboratively accomplishing task a sequential manner. However, practical it is extremely difficult to model both very existing methods. this study, we propose novel model-free...

Viscosity B-coefficients for sodium halides (NaX, X− = Cl−, Br−, and I−) in aqueous monosaccharides (d-glucose, d-galactose, d-xylose, d-arabinose) were determined from density viscosity (η) measurements at 298.15 K. The contributions of solvent property (B1) the electrolyte−solvent interaction (B2) to B-coefficient also obtained together with molar activation energies (ΔμE0≠) electrolytes viscous flow saccharide−electrolyte solution. In addition, 1H spin−lattice relaxation times (T1)...

This paper dissertates the advantage of wind-solar complementary power supply system from complementarities time and region. It describes development single-phase sine wave inverter presents its hardware structure, operation principle, intelligent control method to design for charging discharging. Some key techniques such as circuit topology modes master loop, algorithm discharging so on, are particularized. The proposed technique was applied in 500W/220V/50 Hz DC/AC integrated with...

Due to the differences between simulations and real world, application of reinforcement learning (RL) in drone control encounters problems such as oscillations instability. This study proposes a strategy for quadrotor drones using reference model (RM) based on deep RL. Unlike conventional studies associated with optimal adaptive control, this method uses neural network design flight controller drones, which can map drone’s states target values commands directly. The was developed...

The evolution of product function is the result demand or system evolution, which governed by certain laws and predictable. composition structure classification are proposed to lay foundation for evolution. stages division point out direction design, approaches give concrete method design. forecasting zones provide a practicable space. contradiction analysis make evaluation then TRIZ tools CAI software can help designer solve generate principle solutions. Integrated above contents,...

Due to their intrinsic isotropic magnetic properties, soft composite (SMC) materials are applied in electrical machines which the energy can be transported three dimensions (3-D). However, real applications, complicated properties such as anisotropy and nonlinearity, found, particular, at ahigh frequency range. This paper studies 3-D of SMC under magnetizations, circular, elliptical, spherical excitations. The flux density vector B loci, field strength H core losses magnetization frequencies...

This paper presents a hardware based cache scheme to detect misbehaving nodes in mobile ad hoc network. In this scheme, the monitors activities of upper-layer software and reports misbehavior other The stores identity information recently received packets. detection mechanism uses packet dropping misrouting. simulation results show that can nearly 100% with 0% false positive scenario. misrouting scenario, has more than 90% rate. result could be used by protect

This paper studies a wind-solar complementary single-phase sine wave power inverter, including the hardware structure, operating principle, and method to charging discharging design. A dual-level three-state intelligent float based on PIC single chip control is brought forward for combining special characteristics of energy system. It helps automatic transfer between active protection battery. Unattended system achieved. With help reasonable calculation simulation analysis, final parameters...

The paper mainly describes the test system of AC contactor for electrical parameters, which is in control microcomputer. Under software, could operate samples at set frequency and measure real-time parameters contacts. functions include automatic voltage adjusting, dynamic data acquisition based on FIFO, contact state monitoring, saving automatically so on. further analysis continuing.

Aiming at the problem of closed-loop detection errors in graph-optimized laser SLAM algorithm high-similarity scenes, we present a method using binocular cameras for detection. Use FAST feature points and BRIEF descriptors with rotation invariance depth estimation; introduce concept local maps, use single-frame lidar data to match improve accuracy front-end. A k-ary tree dictionary based on BoW (bag words) model is used evaluate similarity pictures complete detection, finally, construct...

Relative permittivities for the galactose + glycine water solution have been measured from (278.15 to 313.15) K. Results indicate that logarithmic values of relative increase with increasing molalities and decrease as temperature rises. At given molalities, relationship permittivity can be expressed by a quadratic equation. temperatures compositions glycine, dependence on mole fraction described linear composition galactose, between An empirical equation is proposed used relate log ε ternary...