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To solve the pressure control problems in the aerial hydraulic system on the high pressure and low flow condition, a scheme is raised on the technology of intelligent pump. In this paper, a mathematical model of intelligent pump is built based on the structure and principle of system. As the load in the aerial hydraulic system is complex and the mathematical model is nonlinear, a fuzzy PID control...
In this paper, Fuzzy PID and Fuzzy PD+I controller are designed for a nonlinear quarter car suspension system. The main aim of these controllers is to decrease vertical car body displacement and control signal, therefore provides more comfortable conditions for passengers. Simulation results show excellent efficiency of the proposed controller.
In this paper, linear elevator driven by permanent magnet synchronous linear motor (PMLSM) is used in fuzzy PID control method, in which it is to adopt the magnetic guidance system to control the PMLSM gap which changed frequently, and it can impact the vertical thrust and control the level vibration and noise in the process of start, operation, and stop to make passenger comfortable. Matlab modeling...
So far, most of the proton exchange membrane fuel cell (PEMFC) models are difficult to apply in the control system design. In this paper, a dynamic control model of PEMFC system is set up. Based on this model, a self-adaptive fuzzy PID controller and a PID controller are respectively used to control the output voltage. The simulation results show that, this adaptive fuzzy PID controller can control...
Taking error and error rate of change as input, this paper realized the online slef-tuning of PID parameter with the method of fuzzy inference, and made a modeling design and simulation on the controller in the Matlab environment, and realized the non-linear processing to PID controller and the non-linear mapping between the changes of system characteristics and controlled variables. This hybrid system...
The dry mortar production line generally adopts a top-down layout. It results in the material dropping error in the process of batching, which is difficult to ensure the accuracy of batching. Moreover, there are nonlinear, large time delay, strong coupling and other features in the dry mortar batching system. It is hard to meet requirement by PID control, so a fuzzy PID controller is proposed to control...
For the purpose of control warp tension of rapier loom and prevent negative impacts on the quality of the fabric by reasons of the excessive fluctuation. This paper took let-off system of SAURER400 rapier loom as investigated subject and laid out the application of fuzzy-PID and multi-neuron adaptive PID control method. This paper gone through with a simulation by use of Simulink of the Matlab and...
Based on practical industrial process control, the concept of networked cascade control system (NCCS for short) is introduced. The simulation of a typical class of NCCS based on TrueTime toolbox by fuzzy PID control method is implemented and investigated. In this kind of NCCS, a real-time network is inserted in the control loops between the primary and secondary controller, as well as between the...
In odder to improve positioning precision and decrease the exceed initial value of solar cell transfer robot, we design a kind of PID controller with fuzzy self-adjusting function based on fuzzy control technique, solve the problem that the PID-controller can not adjust parameters itself on line. The result of simulation in fuzzy logic toolbox of Matlab proves that the controller possess both the...
According to the wheelchair control particularity for requirements, this paper proposes a parameters self-adjusting fuzzy PID control strategy in accordance with wheelchair speed deviation and changes in the rate of deviation which is applied to DC motor speed control system to achieve optimal control for the wheelchair. At the same time, implement control system simulation though MATLAB toolboxes...
Designed a parameter self-tuning PID-controller based on fuzzy control, which can adjust PID-parameters according to error and change-in-error. A simulation study of the system shows that the controller possesses both the precise character of PID controller and the flexible advantage of fuzzy controller. It can eliminate the steady error of the system promptly.
This paper describes a three-phase full control rectification circuit controller which is widely used in the system of speed regulation of DC motor. Conventional PID controller with double close-loops has been used in speed control of separately excited DC motor at present. But under conditions of actual operation we find that it isn't suitable for the high performance cases, because of the low robustness...
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