In this paper, a fuzzy failure mode and effects analysis (FMEA) method is proposed by combining fault theory method. The addresses the problem of board thickness control deviation defect blanking, which can occur during continuous hot pressing (CHP) process, one most important processes in production medium-density fiberboard (MDF). combines with Hamming code using to calculate represent cylinder array hot-pressed execution unit analyze process potential fixed modes MDF press production,...

With the ultimate goal of intelligent sensing for flocking control MDF continuous flat-pressing system, deviation type granular construction and effective expression state information are applied to IoT human-computer interaction in real production site satisfy multi-objective optimization requirements flexible process agile manufacturing. Accordingly, an innovative research work on distributed mode synergy method hot pressing is carried out, interventional three-way decision cooperative...

This paper presents a novel nonlinear control approach for medium-density fiberboard continuous hot pressing electro-hydraulic servo system (EHSS). The EHSS is subject to input saturation and unknown external disturbance. developed in the framework of prescribed performance design. transient steady behaviors are both considered by virtue an appropriate function. A new robust adaptive neural algorithm then introducing dynamic surface scheme. Moreover, compensation designed term arising from...

In order to improve the accuracy and stability of intelligent omnidirectional AGV path tracking based on Mecanum wheels, an improved hybrid error control method is proposed. The combines angular velocity vehicle with correction longitudinal as coupling estimation error. pure algorithm are combined lateral car, while PID used vertical further reduce interference. ROS simulation results showed that compared effect traditional algorithm, closer real path, which greatly trajectory deviation...

Aiming at the problems of low classification accuracy and overfitting caused by limited number particleboard image samples, a Capsule Network algorithm based on improved CBAM (Convolutional Block Attention Module) attention model is proposed. The utilizes GELU equation to improve incorporates it into convolutional layer Network. In this way, optimizes feature maps surface defects and, meanwhile, improves training efficiency stability model. alleviates problem adding dropout layer, which...

Considering the linear motion of particleboards in production line, detection surface defects is a major challenge. In this paper, method based on moving target tracking proposed for particleboards. To achieve this, kernel correlation filter (KCF) algorithm was modified with median flow and used to capture targets defects. The defect images were extracted by Sobel operator, number, area, degree damage calculated. level evaluated fuzzy pattern recognition. Experiments then carried out prove...

This paper presents an adaptive backstepping terminal sliding mode control scheme combined the disturbance observer for hot press hydraulic position servo system with composite including internal parameter perturbations and external load disturbance. The (SMDO) based on adaptive-gain super-twisting (STW) algorithm is introduced to ensure robustness of respect improve performance. Meanwhile, controller SMDO designed by introducing a novel non-singular (NTSM). can derive tracking error third...

In this paper, the problem of model reference adaptive sliding mode control for a class perturbed uncertain systems is investigated. An integral surface design proposed by adding an term into linear surface. The additional in provides one more degree freedom and also reduce steady-state error. Based on Lyapunov stability theorem, strategy solving robust tracking without knowledge upper bound perturbations developed. use technique to adapt unknown so that objective globally asymptotical...

The quality and uniformity of the wood drying are determined greatly by airflow distribution, velocity, pressure, temperature, humidity in kiln these factors significant to fluidics research on wind circulation systems. In this paper, an airflow-coupling model a stack centre for systems studied using renormalisation group k-ε turbulence wall-function method, unified modelling theory is used predict changing section pressure temperature columned structure. addition, emulation researches...

The effective and comprehensive utilization of forest resources has become the theme global “dual-carbon strategy”. Forestry restructured wood is a kind wood-based panel made fiber composite material by high-temperature high-pressure restructuring–molding, an important in field construction, furniture manufacturing, as well derivative processing for its excellent physical mechanical properties, decorative performance. Taking Medium Density Fiberboard (MDF) recombinant research object,...

A new hybrid control system for the rotational maneuver and vibration suppression of an orbiting spacecraft with flexible appendage is designed. The proposed includes attitude controller designed by integral variable structure (IVSC) concept, attenuator input shaping technique. rational this scheme that can achieve good precision pointing, even in presence parameter variations, uncertainties, and/or disturbances, whereas shaped applied to actively suppress undesirable vibrations excited...

A novel hybrid robust control design method is investigated for a three-axis-rotational maneuver and vibration stabilization of spacecraft with flexible appendages. Based on the backstepping, attitude law derived to motion spacecraft. For actively suppressing induced vibration, strain rate feedback methods are presented by using piezoelectric materials as additional sensors actuators bonded surface Numerical simulations demonstrate feasibility effectiveness strategy.

Proper control of the wood-drying kiln is crucial to ensure satisfactory quality dried wood and in minimizing drying time energy. This paper investigates development evaluation a robust system for process incorporating variable structure (VSC) such that moisture content lumber will reach be stabilized at desired set point. A description dynamics by means time-delay neural network also presented, which back-propagation algorithm was implemented testing, training validation. Then this...

This investigation is to apply the so-called component synthesis vibration suppression (CSVS) based feedforward control and conventional PD feedback of a flexible spacecraft. The proposed design process two fold: attitude controller followed by attenuator. law on Lyapunov stability theory achieve stabilizing closed-loop system. shaped command input CSVS method designed for reduction modifying input, which only requires information about natural frequency damping To extend system with on-off...

In this paper, we develop a robot manipulator for furniture coating and present composition kinematic theory, give the method to obtain optimal path of applicator on plane two intersecting respectively .on basic applying overlap distance velocity solve optimize trajectory problem, make further consideration effect spray deposition rate moving velocity. To test effectiveness prove rationality, process that in three dimensions was simulated Robotics Toolbox matlab. The results appeared planned...

In order to guarantee slab thickness precision of Medium Density Fibreboard (MDF), an adaptive fuzzy Dynamic Surface Control (DSC) was investigated. Firstly, a mathematical model for hydraulic servo system the continuous hot-pressing machine with input saturation proposed, and auxiliary introduced compensate effect saturation. Due uncertain function in model, logic approximate it. Subsequently, tracking controller less complexity developed help DSC approach. Simultaneously, on-line law...

In order to improve the accuracy and stability of intelligent omnidirectional AGV path tracking based on Mecanum wheels, an improved hybrid error control method is proposed. The combines angular velocity vehicle with correction longitudinal as coupling estimation error. pure algorithm are combined lateral car, while PID used vertical further reduce interference. ROS simulation results showed that compared effect traditional algorithm, closer real path, which greatly trajectory deviation...

In order to realize high-precision position tracking control for (Medium Density Fiberboard, MDF) continuous hot press hydraulic servo system in the presence of interior parameter perturbations and external load disturbance, an adaptive backstepping sliding mode strategy with fuzzy disturbance observer (FDO) is presented. Firstly, a modified FDO designed estimate compensate system. Secondly, controller algorithm used online uncertainty Thirdly, convergence error asymptotic stability are...

In order to realize position tracking for Medium Density Fiberboard (MDF) continuous hot pressing electro-hydraulic servo system at the fixing thickness stage, a sliding-mode dynamic surface control strategy is proposed. Compared with backstepping method, (DSC) introduces first low-pass filters into procedure calculate derivatives of synthetic inputs, which simplifies design. Owing parameter variations and external load disturbances in system, applied third subsystem improve robustness. The...

In this paper, a robust adaptive tracking control problem is investigated for medium density fibreboard (MDF) hot press hydraulic system in the presence of interior parameter perturbations and external load disturbance. Firstly, novel fuzzy disturbance observer designed to estimate system, output fed back into input compensate model. Subsequently, continuous controller that ensures finite-time convergence state third subsystem. Numerical simulation results are also exhibited authenticate...

An adaptive inverse disturbance canceling method for normal pointing attitude control and vibration reduction of an orbiting spacecraft with flexible appendage is proposed by defining the correlative as "modal disturbance". In this method, dynamical system rigid first modeled using NARX neural network. Then, a very close copy model, disturbance-free match to plant, fed same input plant. The difference between disturbed output plant model estimation modal disturbance, which filter. Upon that,...

This paper investigates the airflow circulation system based on array fans for wood drying kiln process incorporating simulation of patterns, velocity and pressure distributions. A description array-based is presented, furthermore, by setting mesh size, grid unit boundary conditions appropriately with fluid tools using renormalisation group (RNG) k-ε turbulence model theory, experiments are established. The results evaluated to demonstrate that designed can improve working efficiency rate;...

This paper is concerned with the problem of fuzzy guaranteed cost control time-delay system parametric uncertainties based on T-S model. By making out singular value matrix, biggest extension uncertainty found. Sufficient conditions for existence a law and an upper bound function closed-loop are given in terms linear matrix inequality (LMI). It proved that such optimal exists. A procedure to select controller minimize quadratic performance index.