This paper introduces a novel neural network adaptive fractional-order sliding mode control strategy based on the minimal learning parameter method (MLPNN-FOSMC). aims to solve problem of relative position in satellite formation flying (SFF), especially presence model uncertainties, external disturbances, input saturation, and unknown actuator gains. First, mathematical for positioning is derived. Then, controller introduced integrated with radial basis function (RBF) (MLP) compensate errors...

The control of complex industrial processes has been a forefront research topic. Biodiesel production, as typical reaction process, exhibits multivariable coupling, nonlinearity, and high latency, making it challenging for traditional methods to achieve real-time under varying operating conditions. To address this issue, paper proposes method based on the twin delayed deep deterministic policy gradient (TD3) algorithm, which dynamically adjusts process parameters adaptive optimization...

Aiming at the problem that end motion of a robot arm is constrained and cannot be accurately modeled when it in contact with working environment, reduced order fuzzy neural network sliding mode control method designed to realize high-precision tracking Angle, angular velocity force each joint. Firstly, model double-joint manipulator simplify dynamic reduce computational difficulty. Then, used approximate friction nonlinear quantity generated during movement manipulator. Finally, improve...

This article presents a hybrid position–force control method based on adaptive neural network for addressing the problems of position and force tracking constrained reconfigurable manipulator. The reduced-order dynamic model manipulator is formulated considering uncertainty external constraint. Combining decentralized with centralized scheme, controller designed controlling coupling effect are compensated by radial basis function network. stability closed-loop system proved using Lyapunov...

Purpose Marx’s monetary theory is an important part of Marxist economics and irreplaceable milestone in the intellectual history theory. The purpose this paper to summarize main content from three aspects: source nature money, function money historical significance money. Design/methodology/approach Moreover, also gives extended understanding four perspectives: endogenous credit mechanism functions demands for financial economic social Findings Lastly, present discusses practical...

In this paper, a force/position control method is proposed for constrained reconfigurable manipulators based on extended state observer (ESO). First, the reduced-order dynamic model of manipulator formulated in presence external constraint. Second, backstepping sliding mode controller designed with observer, which used to estimate overall uncertainty, and desired position force can be tracked accurately. The stability system proved by using Lyapunov theory. Finally, simulations are performed...

A novel, effective, and feasible attitude-orbit cooperative control algorithm with adaptive sliding mode neural network is developed in this study. The analyzed investigated for the problem of attitude disturbance caused by orbit transfer small satellites chemical propulsion. changing rule satellite fuel consumption rate moment inertia are given experimental measurement. interference torque model based on propulsion 6-DOF dynamic mass variation established respectively, given. novel...

ABSTRACT Methylethylsilicone rubber (MESR)/methylphenylsilicone (MPSR) blends were cured with 2,5‐dimethyl‐2,5‐di( tert ‐butylperoxy)hexane. The curing characteristics, morphology, thermal behaviors, mechanical properties at different temperatures, radiation resistance, and aging resistance of the MESR/MPSR investigated. results show that a high MPSR content could decrease optimum time improve scorch safety. Dynamic analysis revealed glass‐transition temperature increased slightly addition...

Abstract In view of the technical difficulties in preparation graphite intercalation compound (GIC) such as complex processes, need to use strong acid reagents, and product containing corrosive elements. A novel, efficient simple method used sodium bicarbonate agent was developed, which combined with mechanical force chemical for green production GIC. The parameters were optimized by single factor experiments, optimal conditions ball mill speed 500 r/min 4 h (6 mm diameter stainless-steel...

We investigate the tracking control problem for a non-strict feedback nonlinear system with external disturbance and time-varying asymmetric full state constraints. Firstly, unknown term in are estimated by fuzzy logic system. The backstepping method is applied to design of adaptive controller. However, prevent that constraints overstepped introducing an improved log-type barrier Lyapunov function (TABLF) each step design. Secondly, dynamic surface (DSC) introduced designed algorithm solve...

Silicon oxide is widely used as a thin film to improve the surface properties of materials, because it anti-resistance, hardness, corrosion resistance, dielectric, optical transparency etc.Just these excellent performances, silicon films are in many fields.There ways get films, such evaporating deposition, sputtering ion plating, plasma enhanced chemical vapor deposition (PECVD), atmospheric pressure sol-gel method and oxidation etc. preparative techniques have obtained certain research...

Pollution flashover is the main factor that affects safety of transmission line and transformation equipment. Generally, anti-pollution coating considered to be one most effective means prevent reduce pollution flashover. Currently, mostly used room temperature vulcanized (RTV) silicone rubber. To solve key technical problems coating, this work focus on improving base gums, mechanical properties, thixotropic fire resistance, resistance anti-weather capabilities RTV rubber coatings. The...

Promoting the competitiveness of China's agricultural industry is crucial for building China into a great modern country.The aggravation external risks and basic national conditions-smallholder farmers, resource shortage, tight balance products supply demand-propose new requirements challenges to industry.It becomes urgent redefine propose corresponding strategic framework development stage.In this study, we concept labeled as safe diversified, green efficient, core control, independent...

A new method to calculate very fast transient over-voltages (VFTOs) in transformer windings has been presented. The applied algorithm uses a hybrid model which is combination of the multi-conductor transmission line (MTLM) and single-transmission (STLM). voltages at end each coil are calculated with STLM model. Then, these values used MTLM determine distributed along turns. Several representative curves respect time illustrated. maximums over-voltage electric field intensity generated wire...