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With the serious pollution of urban industry, sewage treatment has become an urgent problem to be solved. However, there are many problems in the traditional sewage treatment process, resulting in waste of energy, secondary pollution, and so on. In order to overcome the lack of artificial dosing in ozone water treatment system, this paper presents a fuzzy adaptive PID control algorithm for ozone water...
Ozone is considered as one of the strongest oxidizing agent, yet it leaves no residues that are harmful to global environment. In this paper, the close loop control of ozone generator has been studied. The main concern of this issue is to achieve desired ozone concentration. Due to the ozone generation process is a complex nonlinear multivariable system, which is difficult to model and regulate, thus...
This paper discusses a novel strategy of dynamic modeling of clarithromycin against Helicobacter pylori. A nonlinear fractional order equivalent circuit model is proposed to describe kill-time curves for different concentrations of antibiotics and different ages of bacteria. The efficiency of the time domain analysis method has been proved by plenty of tested data. All model parameters and variables,...
Modern production requests higher ability of transportation, thus intelligent machine is needed to replace human to work. The automated guided vehicle can carry heavy loads by human, people can choice the way they go and how fast they run. The chip selected is STM32f103VET6 which can provide many functions and it is frequently-used in intelligent machine. The L298n and actuator are selected to control...
In order to alleviate the congestion between the side road and the freeway, a novel balancing control scheme is proposed based on model free adaptive iterative learning control (MFAILC) in this paper. Controller realization possesses the model free attribute to merely utilize the measured input and output (I/O) data of the controlled plant of side road and freeway. The control performance is enhanced...
A fault feature extraction model based on the PCA and wavelet packet is proposed to describe the characteristics of gearbox fault feature, which is expressed by low amplitude of the vibration signals, and easy to be disturbed by system and noise. Firstly, the PCA is used to reduce the correlation between the data dimension and the data. Then, the gearbox signals are decomposed by wavelet packet, and...
The robustness is one of the primary characteristics of a real system, which impacts the function and performance of the system. Many real systems in our real world can be formulated as complex networks. It is a feasible method to estimate the robustness of real systems from the perspective of complex networks. The robustness evaluation is one of the basic and hot research topics in the field of complex...
An adaptive boundary controller is developed in this article for minimizing the vibration displacement of a flexible riser. The dynamics of riser system is represented by partial-ordinary differential equations. Through combining boundary control, adaptive technique with backstepping technique, an adaptive boundary controller is given for realizing vibration restraint for the riser system, where an...
This paper investigates the problem of the distributed cooperative learning over networks via the wavelet approximation. On the basis of the wavelet approximation (WA) theory, the novel distributed cooperative learning (DCL) method, called DCL-WA, is proposed in this paper. The wavelet series is used to approximate the function of network nodes. For the networked systems, DCL method is used to train...
This paper addresses the problem of repetitive control for systems in which the reference input is a periodic signal, with known a period. The sliding mode repetitive controller based on switching-function dynamics is designed to eliminate the disturbances with the same period. In exponential reaching law, the sign function is replaced with power item to decrease chattering and a measure of disturbance-rejection...
Flight vehicle attitude control is of great importance. In this paper, a flight controller based on active disturbance rejection control (ADRC) is proposed. Then stability margin tester is utilized to tune the parameters of the controller to meet the specified stability margins, which will serve as a practical tuning method in practice. Moreover, the CAD software based on MATLAB GUI is designed to...
It presents a sliding mode strategy integrated with rear angle and yaw moment to control the four-wheel-steering vehicle. The slip angle and yaw rate of vehicle gravity center are controlled variables. One input of sliding mode controller is the front steering angle which is measured by sensor, while others are estimated values of disturbance bound and the errors of slip angle and yaw rate. Furthermore,...
This article designs a dual-loop energy-saving control scheme for the refrigeration system. To deal with the actual refrigeration system with characteristics of large time-delay, a model-free adaptive control method with input rate constraint of time delay is designed to reduce the impact of large time delay on the whole control process. Simulation study of typical system with large time delay is...
The innovation graph method and current reckoning method are combined to realize complementary advantages and comprehensive identification in this paper. For different identification objects, using different identification method, the bad measurement is mainly caused by current reckoning method, and the topology change identification is mainly done by the innovation graph method. This way uses the...
Due to the development of aerospace technology in China, this paper proposes a method of characteristic line detection and matching to reconstruct the non-cooperative target. The geometric and algebraic constraints are given by its 2D images, and the linear equations about position and attitude of the aircraft relative to the non-cooperative target are deduced by n lines (n > 13). Then, by using...
Recent empirical evidence from research on temporal networks has shown that the time constraints imposed on individual interactions are crucial for understanding the generic structure and dynamics of networks. A desirable but challenging task is sampling the waiting time distribution (WTD) associated with their internal interactions, a defining feature that reflects the added time dimension of temporal...
In order to solve the problem of override trip in high-voltage power supply system of coal mine, a new scheme for preventing override trip is proposed on basis of optical fiber locking control. Referring to a typical mine power supply system, the short circuit protection principle of high-voltage grid based on optical fiber locking is analyzed. The hardware circuit, as well as the control procedures...
This paper deals with cooperative control problems for multi-agent networks subject to directed dynamic interactions. First, the directed dynamic interactions in these networks are described by directed dynamic graphs which admit adjacency weights of edges in terms of transfer functions. Then a distributed dynamic protocol is proposed based on the nearest neighbor rule, and the Lyapunov-based approach...
Considering the time-varying scaling function matrix and system disturbances, a new sliding mode control strategy is proposed to realize modified function projective synchronization (MFPS) of two different fractional-order hyperchaotic systems, meanwhile improve the control robustness of synchronization system. From the MFPS error equations, combining a proper fractional-order exponential reaching...
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