In modern industries, bearings are often subjected to challenges from environmental noise and variations in operating conditions during their operation, which affects existing fault diagnosis methods that rely on signals single types of sensors. These fail provide comprehensive stable information, thereby affecting the diagnostic performance. To address this issue, paper introduces a multi-source multi-domain information fusion method for (M2IFD) bearings, integrating an attention mechanism...

With the broadband, noise-like, and non-periodic characteristics of chaotic signals, digital modulation schemes have received extensive attention. A new short reference orthogonal double bit rate differential shift keying (SR-ODBR-DCSK) communication scheme is proposed in paper. The technology generates two signals by using orthogonality acting on Walsh function modulates continuous two-bit data information respectively to achieve simultaneous transmission at same time slot. Odd bits even...

A short reference differential chaotic shift keying communication system based on signal scrambling transformation (RSST-SR-DCSK) is proposed in this paper. The introduces information-bit-driven scramblers at the transmission end to effectively eliminate correlation between and information signal. At receiving end, a descrambler used restore correlation, thereby enhancing security. Additionally, employs mechanism further increase rate. transmitter receiver structures of are designed through...

A new multi−carrier orthogonal double bit rate differential chaotic shift keying (MC−ODBR−DCSK) communication system is presented in this paper. With two composite signals generated by an signal generator as reference signals, 2M bits of information data are transmitted on M−channel subcarriers, improving transmission speed and energy efficiency. In addition, the receiver does not require a radio frequency (RF) delay circuit to demodulate received data, which makes easier implement. This...

WiFi fingerprinting positioning systems have been used in tunnels. But, the limitation and complexity of tunnel environment, solution to achieve a high accurate system remains open. In order solve this problem, we done following three tasks: 1) Different access point (AP) layout schemes are proposed for several different environments; 2) A dynamic fingerprint database based on test signal is established; 3) An improved algorithm designed by combining k-nearest neighbors(KNN) fuzzy C-means...

This paper presents a kind of intelligence control algorithm for the mine hoist system. Firstly, desired output system is described by speed curve hoisting process. Then, structure diagram constructed, and expert PID controller designed based on model this system; knowledge base was established according to analysis characteristics in different periods Finally, effect verified SIMULINK simulation; comparing with result conventional control, improved more safe suitable

In order to improve stability and capability of rejecting disturbance the platform, feedforward controller observer (DOB) are used in angular loop 3-axis stabilized platform. This method can effectively avoid conflict between rapidity system. Using error signal as evaluation index, DOB accurately track external disturbances, such constant, periodic random signal, eliminate model mismatches robustness inner loop. Finally, simulation result shows that composite control has better dynamic...

In this paper, the ideal normal mode characteristic equation of optical fiber with uniaxial anisotropic crystal cladding is derived. Using mean value theorem and combining Matlab numerical method, a solving algorithm transcendental proposed. Therefore, relationship between FBG reflect spectrum reflective index simulated. The simulation results show that kcl has strong influence on spectrum, different values can lead to reflectivities Bragg wavelengths.

With the expansion of grid scale, fault location for transmission lines put forward higher requirements. In this paper, current as research object, according to singularity current, iterative SVD decomposition method is adopted reduce noise traveling wave, and singular points are detected by dichotomy recursive SVD. Based on analysis principle initial wave reflected point, a eliminate error caused uncertainty velocity forward. The correctness verified PSCAD simulation.

In this paper, a kruskal algorithm of graph theory in calculating the cost erecting communication network by matlab is presented. With algorithm, optimization choice total construction between cities and provide some code GUI which uses fuzzy weight process, obtained.

The design and verification of accurate temperature control system the oven with small or middle scale programmable logic controller (PLC) base on dahlin algorithm is introduced. can achieve to pure lag regulate other form same controller. cost-effective specific modular instrument for complex computing in some automatic device. Meanwhile, computed simulated by matlab softwear verifying implementation. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3101

The ordering of high-periodic attracting points and their periodic buds in Mandelbrot set have been analyzed. Using the method computer mathematic experiments, five-periodic are solved topology distribution images six-period gained. Furthermore, reasons bottleneck In this paper, we study distributing discipline characteristic, focused on created a recurrence formula between numbers set. As result, it provides useful discussion internal structure

Based on the research of air-ground data link communication principle, model between multiple aerial platforms and single ground station is designed. At same time, combined with software interface development STK, VC MATLAB, simulation for carried out. The realizes generation, transmission reception multi-channel signal by MATLAB. And information flight platform displayed through interaction at interface, finally visual display presented to user STK. design more flexibility than existing...

To address the problems of low classification accuracy in bird sound recognition algorithms, a method based on FBank feature extraction is proposed. features are extracted from audio data, trained with Transformer model, and confusion matrix model obtained by adjusting learning rate optimizing loss function. Tests have shown that proposed has good identifying 10 types sounds.

With the depletion of traditional energy sources, microgrid control technology represented by VSG has received extensive attention. In order to overcome shortcomings methods, such as long transient time and over-damped operation mode, An alternating adaptive strategy changing moment inertia damping coefficient was established further analyzing influence on dynamic output characteristics verified simulation MATLAB/Simlink platform. The theoretical analysis results show that method can...

Particle swarm optimization (PSO) is a new evolutionary algorithm developed in recent years. It easy to implement with few parameters, but it often fall into local the later period. This paper introduces interbreeding genetic algorithms (GA) increase population size diversity, and uses inertia weight adjustment method of chaos mechanism adjust factor, proposes an adaptive hybrid particle (AIHPSO). In this paper, six representative nonlinear experimental functions are used simulate compare...

Aiming at the problem of UAV space target positioning, this paper proposes a monocular visual multipoint locating method based on photogrammetry technology and inertial navigation information. The establishes three-dimensional coordinate error equation obstacles principle three points collinear. In process rigorously solving equation, uses Tikhonov regularization L-curve to reduce noise interference in positioning meet accuracy requirements. Finally, builds hardware platform for verify...

Automobilespsila maneuverability, security and comfort are very important. To obtain the ideal steering stability cornering portability of vehicles in any conditions, a multi-body dynamic model automobile equipped with electric power system (EPS) is established Matlab/Simulink ADAMS. A new control method presented which combined strategy parameter compensation method. The simulation results show that, yaw can improve automobiles when large angle on slippery roads; Return lack returning...

In this paper, the colour, grayscale and edge of Nymphalidae larvae are analyzed by using image segmentation technology, results applied to data system simulation. Then is proposed as target system. It predicts population simulating larval STELLA software. also mainly understand influence environmental fitness on number at each stage.

This paper proposes a fractional-order PD controller to suppress the vibration of typical pipeline system nuclear power plant. In view characteristics systems plants, mathematical models are established and dynamic equations derived make complex digitized for analysis research. A piping damping based on control is designed. The introduces differential order basis traditional integer-order improve matching degree model. Under this structure, quadratic performance index designed, particle...