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Method for designing magnetic levitation system fuzzy controller based on event triggering

A fuzzy controller and event-triggered technology, applied in adaptive control, general control system, control/adjustment system, etc., can solve problems such as system instability, difficult calculation, limited bandwidth, etc., to save bandwidth resources, reduce The effect of information transmission

Active Publication Date: 2018-10-30
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the complexity of the system under study increases, sometimes it is difficult to establish an accurate model, and sometimes the object of study has complex conditions such as strong nonlinearity, time delay, time variation, and external interference. It is difficult to solve and calculate using current mathematical methods. Traditional control methods are no longer suitable for
[0004] In the actual maglev system, since the sensors, actuators and the designed controller are all connected to the control system of the train as nodes, and exchange data through the network, because the bandwidth of the network is limited, it is easy to cause information collision and generate input induction time. Delay, may lead to instability of the controlled system

Method used

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  • Method for designing magnetic levitation system fuzzy controller based on event triggering
  • Method for designing magnetic levitation system fuzzy controller based on event triggering
  • Method for designing magnetic levitation system fuzzy controller based on event triggering

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Embodiment 1

[0174] The simulation is carried out by using the event-triggered fuzzy state feedback controller designed for the maglev nonlinear system. Table 1 below lists the corresponding parameters in the magnetic levitation system, and Table 2 below lists the allowable value range of the antecedent variable θ(k).

[0175] Table 1 Parameter values ​​of maglev nonlinear system

[0176]

[0177] Table 2 Allowable range of antecedent variable θ(k)

[0178]

[0179] Using the parameter values ​​in Table 1 and Table 2, the exact expression of the original maglev nonlinear system can be obtained. Before solving the fuzzy controller, the stability of the original maglev nonlinear system is analyzed first. First, suppose the initial condition of the state of the system is x(0)=[0.0001 0 0] T . image 3 The state trajectory diagram of the original maglev open-loop system is given.

[0180] From image 3 It can be seen that the state trajectory of the nonlinear magnetic levitation is...

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Abstract

The invention discloses a method for designing a magnetic levitation system fuzzy controller based on event triggering. The method comprises the following steps of 1, building a dynamic model of a nonlinear magnetic levitation system, unfolding the model at balance points, then converting the model into a state space equation, and conducting T-S fuzzy modeling on the magnetic levitation system according to four fuzzy rules; 2, using an event triggering strategy and the fuzz controller to obtain a corresponding magnetic levitation closed-loop fuzzy system based on event triggering; 3, using aninteractive convex combination method and a Lyapunov function on which fusion parameters depend to deduct a stability condition and design the corresponding fuzzy controller based on event triggering,and using linear matrix inequalities for representation, so that MATLAB solving is facilitated. By means of the method, the nonlinear magnetic levitation system can be effectively controlled, so thatthe system is stable during running; meanwhile, unnecessary information transmission can be reduced, and bandwidth resources are saved.

Description

technical field [0001] The invention is applied to the fuzzy control of a nonlinear system, and in particular relates to a method for designing a fuzzy controller of a magnetic levitation system based on event triggering. Background technique [0002] Magnetic levitation systems are widely used in many practical production applications due to their environmental, commercial and technical aspects. The maglev train of the EMS system is a very advanced rail transportation tool today. The EMS system uses electromagnetic force to overcome gravity, and uses the principle of "same sex repels, opposite sex attracts" to make the maglev train float above the track with a certain gap, making it completely detached from the track. The maglev train needs to control a stable current in the normal operation state to ensure the normal levitation of the train and high-speed safe driving, so the current control technology of the maglev train is very important. Due to the participation of el...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 苏晓杰章一芳刘鑫鑫文瑶
Owner CHONGQING UNIV
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