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With the partial or global target positions unknown, mobile robot detects the environment information by laser radar when it can not feel infrared of some frequency. The combination of the resolution-changed time-varying potential field algorithm and the traditional method of fuzzy logic control makes the robot quickly get out of the local environment. Having felt the infrared from outside, the robot...
In order to improve the performance of HVDC, using adaptive Fuzzy Self-Tuning PI Controller instead of traditional PI controller in the rectifier sides, take the deviation and its rate of the current in the DC Line as the inputs. Then adjusted On-line PI parameters according to the operation condition, and aimed to make the performance of the system is more superior. The DC circuit fault was simulated...
The paper presents aspects concerning the tuning of two-degree-of-freedom (2-DOF) fuzzy controllers focused on 2-DOF PI-fuzzy controllers and on 2-DOF PID-fuzzy controllers. 2-DOF Mamdani and Takagi-Sugeno fuzzy control system structures are offered. The tuning is based on mapping the parameters of the linear PI and PID controllers to the parameters of the fuzzy controllers in terms of the modal equivalence...
This paper uses a dynamic method to analyze the direct gasification and melting incineration process. By using fuzzy methods, it solves a temperature control model that consists of 4 inputs and 2 outputs. GA (Genetic Algorithm) is used to construct the learning algorithm, which is able to find the optimum rule base. The simulation and field application results show that the GA-based fuzzy model can...
The main aim of this paper is to design a hybrid force-position controller using fuzzy logic (FL) for the robotic arm of a 9 degrees of freedom (DOF) upper limb wearable exoskeleton rehabilitation robot. The robot is designed and built in our lab for assisting in the rehabilitation of patients post-stroke. The robotic arm of the rehabilitation robot is driven by pneumatic muscles (PM) and its dynamic...
Firstly, it introduces the different operating modes and control mechanism of the high-voltage DC transmission (HVDC) system and analyzes the fuzzy control theory. On this basis, using MATLAB, a typical 12-pulse HVDC transmission system model of the bridge has been simulated under the control of traditional PI and fuzzy intelligent respectively. Compared with the traditional control methods, the real-time...
In order to eliminate steady-state errors and chatter caused by quantization error of the conventional fuzzy controller, based on the self-adjustment of quantified proportionality factors fuzzy controller, this paper establishes the flexible fuzzy controller, and can achieve the online parameters self-adjusting function. This method is used in inflation process of pneumatic membrane structure, which...
PWM rectifier technology is introduced to the main Power Circuit of the charger for aircraft battery to enhance the charging efficiency of aircraft battery and improve its long term reliability and save its life in this paper. A new strategy of DPC Based on the Space Vector Modulation (SVM) is used in PWM rectifier, Meanwhile, a fuzzy PI controller is designed in DC voltage control loop. The simulation...
Temperature is a very important parameter in industrial production. Based on Fuzzy PID controller structure and study algorithm, fuzzy PID controller can be used in actual industrial processes on Kingview movement platform by using PLC technology. The results show that PID parameters can be adjusted on line by control strategy configuration, and the effect meets the need in temperature control experiments.
This article introduces the make-up and principle of intelligent wheat dampen control system, establishes system mathematical models, analyses PID control and the fuzzy roles of parameter on-line dynamic self -tuning, develops a fuzzy PID controller.
In this article, fuzzy control theory is used to solve the robot's obstacle avoidance problem. The inputs and the outputs of the fuzzy logic control system are selected suitably to establish the fuzzy control rules and the fuzzy-controller. Computer simulation results show that, by using this algorithm, the robot can avoid the obstacle accurately, and arrive at the destination quickly.
The design of the voltage loop and current loop of three-phase high power factor PWM rectifier was introduced, the strategy of dual-mode control that combine fuzzy control to PI regulator is proposed, which use fuzzy controller to obtain quick dynamic response when deviation is in small range and adopt PI regulator to realize no static error when deviation is in long range, improving the control accuracy...
To make an analysis on the output exists oscillation of inverter Fuzzy control system, this paper focuses on the digital signal processor (DSP), brings variable universe into Fuzzy self-tuning PID control structure, and put forward a Fuzzy self-tuning PI double closed loop inverter controller based on variable universe, so as to achieve an online adaptive stretching changes of Fuzzy universe. The...
After this text carries on deep research to the fuzzy controller of routine and PID controller, we know that it is a kind of non-linear controller changed. It has a lot of similarity to PID controller, and then we design a fuzzy PID controller. Fuzzy PID controller is the exactly making of each parameter of the fuzzy controller in the key of comprehensive application that puts in the working range...
This paper describes a fuzzy control system and simulation for ultrasonic motors. Although ultrasonic motor has much merit, such as small size, light weight, high precision, fast control dynamics and large driving force when low speed, etc. However, the nonlinear dynamic characteristic and the accurate mathematical model is difficult to obtain. So the traditional control method is almost no effect...
In this paper, based on parameter self-tuning fuzzy PID controller, a fuzzy inference method is utilized to realize automatic regulating PID parameter, and the application of the controller in a system is studied with MATLAB. The results of simulation indicate that the controller gives a good control performance and has a high reference value for further applications.
A drive for Brushless DC motor (BLDCM), which is fully based on the adaptive fuzzy controllers, is presented in this paper. One of the fuzzy controllers is used in the speed feedback loop to guarantee the accurate speed control. The other fuzzy controller is used in the current feedback loop to track the current change. The proposed full adaptive fuzzy controllers have the characteristics of robustness,...
Adaptive cruise control (ACC) system is a Driver assistant system, which can provide safe and comfortable driving. Based on the analysis of ACC system, a parameter self-tuning fuzzy-PID algorithm is developed to design the ACC control strategy. According to the traffic condition, the parameters of PID controller are adapted on-line by fuzzy rule. The simulation results show that the parameter self-...
The permanent magnet synchronous motor (PMSM) is increasingly playing an important role in alternating current(AC) transmission system. Recently, lots of researches have been investigated for the PMSM system without speed and position sensors. The Vector-control system based on fuzzy self-tuning PID is proposed in this paper. The new algorithm based on fuzzy self-tuning PID can improve the performance...
Caster vibration waveform with variable, non-sinusoidal vibration characteristics, the device uses electro-hydraulic servo drive control algorithm using variable universe fuzzy control, robustness, high control precision, fast response. The paper focuses on variable universe fuzzy controller of rigor the flex-factors that ensure its applicability, and integration testing to determine model parameters,...
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