• Title/Summary/Keyword: Neural Network gain

Search Result 166, Processing Time 0.034 seconds

A Design of Fuzzy-Neural Network Controller of Wheeled-Mobile Robot for Path-Tracking (구륜 이동 로봇의 경로 추적을 위한 퍼지-신경망 제어기 설계)

  • Park Chongkug;Kim Sangwon
    • Journal of Institute of Control, Robotics and Systems
    • /
    • v.10 no.12
    • /
    • pp.1241-1248
    • /
    • 2004
  • A controller of wheeled mobile robot(WMR) based on Lyapunov theory is designed and a Fuzzy-Neural Network algorithm is applied to this system to adjust controller gain. In conventional controller of WMR that adopts fixed controller gain, controller can not pursuit trajectory perfectly when initial condition of system is changed. Moreover, acquisition of optimal value of controller gain due to variation of initial condition is not easy because it can be get through lots of try and error process. To solve such problem, a Fuzzy-Neural Network algorithm is proposed. The Fuzzy logic adjusts gains to act up to position error and position error rate. And, the Neural Network algorithm optimizes gains according to initial position and initial direction. Computer simulation shows that the proposed Fuzzy-Neural Network controller is effective.

H infinity control design for Eight-Rotor MAV attitude system based on identification by interval type II fuzzy neural network

  • CHEN, Xiangjian;SHU, Kun;LI, Di
    • International Journal of Aeronautical and Space Sciences
    • /
    • v.17 no.2
    • /
    • pp.195-203
    • /
    • 2016
  • In order to overcome the influence of system stability and accuracy caused by uncertainty, estimation errors and external disturbances in Eight-Rotor MAV, L2 gain control method was proposed based on interval type II fuzzy neural network identification here. In this control strategy, interval type II fuzzy neural network is used to estimate the uncertainty and non-linearity factor of the dynamic system, the adaptive variable structure controller is applied to compensate the estimation errors of interval type II fuzzy neural network, and at last, L2 gain control method is employed to suppress the effect produced by external disturbance on system, which is expected to possess robustness for the uncertainty and non-linearity. Finally, the validity of the L2 gain control method based on interval type II fuzzy neural network identifier applied to the Eight-Rotor MAV attitude system has been verified by three prototy experiments.

The Speed Control of Induction Motor using Automatic Neural Network Gain Regulator (신경망이득 자동조절기를 이용한 유도모터 속도 제어)

  • Park, Wal-Seo;Kim, Yong-Wook;Lee, Sung-Su
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.20 no.7
    • /
    • pp.53-57
    • /
    • 2006
  • PID controller is widely uesd as automatic equipment for industry. However when a system has various characters of intermittence or continuance, a new parameter decision for accurate control is a hard task. As method of solving this problem, in this paper, a Neural Network gain automatic regulator as PID controller functions is presented. A property feedback control gain of system is decided by a rule of Delta learning. The function of proposed automatic Neural Network gain regulator is verified by speed control experiment results of Induction Motor.

High Performance Speed Control of IPMSM using Neural Network PI (신경회로망 PI를 이용한 IPMSM의 고성능 속도제어)

  • Lee, Jung-Ho;Choi, Jung-Sik;Ko, Jae-Sub;Chung, Dong-Hwa
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
    • /
    • 2006.05a
    • /
    • pp.315-320
    • /
    • 2006
  • This paper presents speed control of IPMSM drive using neural network(NN) PI controller. In general, PI controller in computer numerically controlled machine process fixed gain. They may perform well under some operating conditions, but not all. To increase the robustness of fixed gain PI controller, NNPI controller proposes a new method based neural network. NNPI controller is developed to minimize overshoot, rise time and settling time following sudden parameter changes such as speed, load torque and inertia. Also, this paper is proposed speed control of IPMSM using neural network and estimation of speed using artificial neural network(ANN) controller. The back propagation neural network technique is used to provide a real time adaptive estimation of the motor speed. The results on a speed controller of IPMSM are presented to show the effectiveness of the proposed gain tuner. And this controller is better than the fired gains one in terms of robustness, even under great variations of operating conditions and load disturbance.

  • PDF

The Control of an Electrostrictive Polymer Actuator by Using Neural Network

  • Youn, Ji-Won;Jeon, Jae-Wook;Nam, Jae-Do;Park, Hyoukryeol;Kim, Hunmo
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2002.10a
    • /
    • pp.120.4-120
    • /
    • 2002
  • $\textbullet$ In order to operate EP actuator, high voltage is applied to that. $\textbullet$ Our previous control algorithm for an EP actuator was PI method with constant gain. $\textbullet$ But this Control method is limitation such as rising time, steady-state error, and settling time. $\textbullet$ A neural network algorithm is proposed for improvement of performance. $\textbullet$ To do this, neural network algorithm changes the gain of PI control. $\textbullet$ In order to efficient drive EP actuator, the gain is changed at some point. $\textbullet$ Neural network method improve the performance of operation.

  • PDF

Optimal Gain Estimation of PID Controller Using Neural Networks (신경망을 이용한 PID 제어기의 최적 이득값 추정)

  • Park, Seong-Wook;Son, Jun-Hyug;Seo, Bo-Hyeok
    • The Transactions of the Korean Institute of Electrical Engineers P
    • /
    • v.53 no.3
    • /
    • pp.134-141
    • /
    • 2004
  • Recently, neural network techniques are widely used in adaptive and learning control schemes for production systems. However, in general it takes up a lot of time to learn in the case applied in control system. Furthermore, the physical meaning of neural networks constructed as a result is not obvious. And in practice since it is difficult for the PID gains suitably, lots of researches have been reported with respect of turning schemes of PID gains. A neural network-based PID control scheme is proposed, which extracts skills of human experts as PID gains. This controller is designed by using three-layered neural networks. The effectiveness of the proposed neural network-based PID control scheme is investigated through an application for a production control system. This control method can enable a plant to operate smoothy and obviously as the plant condition varies with any unexpected accidents.

Design of Adaptive Fuzzy Logic Controller using Tabu search and Neural Network (Tabu 탐색법과 신경회로망을 이용한 SVC용 적응 퍼지제어기의 설계)

  • Son, Jong-Hoon;Hwang, Gi-Hyun;Kim, Hyung-Su;Mun, Kyung-Jun;Park, June-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2000.07a
    • /
    • pp.34-36
    • /
    • 2000
  • This paper proposes the design of SVC adaptive fuzzy logic controller(AFLC) using Tabu search and neural network. We tuned the gain of input-output variables of fuzzy logic controller and weights of neural network using Tabu search. Neural network used to tune the output gain of FLC adaptively. We have weights of neural network learned using back propagation algorithm. We performed the nonlinear simulation on an single-machine infinite system to prove the efficiency of the proposed method. The proposed AFLC showed the better performance than PD controller in terms of the settling time and damping effect, for power system operation condition.

  • PDF

Convergence Progress about Applied Gain of PID Controller using Neural Networks (신경망을 이용한 PID 제어기 이득값 적용에 대한 수렴 속도 향상)

  • Son, Jun-Hyug;Seo, Bo-Hyeok
    • Proceedings of the KIEE Conference
    • /
    • 2004.05a
    • /
    • pp.89-91
    • /
    • 2004
  • Recently Neural Network techniques have widely used in adaptive and learning control schemes for production systems. However, generally it costs a lot of time for learning in the case applied in control system. Furthermore, the physical meaning of neural networks constructed as a result is not obvious. And in practice since it is difficult to the PID gains suitably lots of researches have been reported with respect to turning schemes of PID gains. A Neural Network-based PID control scheme is proposed, which extracts skills of human experts as PID gains. This controller is designed by using three-layered neural networks. The effectiveness of the proposed Neural Network-based PID control scheme is investigated through an application for a production control system. This control method can enable a plant to operate smoothy and obviously as the plant condition varies with any unexpected accident. This paper goal is convergence speed progress about applied gain of PID controller using the neural networks.

  • PDF

Turbojet Engine Control Using Artificial Neural Network PID Controller With High Gain Observer (고이득 관측기가 적용된 터보제트엔진의 인공신경망 PID 제어기 설계)

  • Kim, Dae-Gi;Jie, Min-Seok
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.22 no.1
    • /
    • pp.1-6
    • /
    • 2014
  • In this paper, controller propose to prevent compressor surge and improve the transient response of the fuel flow control system of turbojet engine. Turbojet engine controller is designed by applying Artificial Neural Network PID control algorithm and make an inference by applying Levenberg-Marquartdt Error Back Propagation Algorithm. Artificial Neural Network inference results are used as the fuel flow control inputs to prevent compressor surge and flame-out for turbojet engine for UAV. High Gain Observer is used to estimate to compressor rotation speed of turbojet engine. Using MATLAB to perform computer simulations verified the performance of the proposed controller. Response characteristics pursuant to the gain were analyzed by simulation.

Optimal Condition Gain Estimation of PID Controller using Neural Networks (신경망을 이용한 PID 제어기의 제어 사양 최적의 이득값 추정)

  • Son, Jun-Hyeok;Seo, Bo-Hyeok
    • Proceedings of the KIEE Conference
    • /
    • 2003.11c
    • /
    • pp.717-719
    • /
    • 2003
  • Recently Neural Network techniques have widely used in adaptive and learning control schemes for production systems. However, generally it costs a lot of time for learning in the case applied in control system. Furthermore, the physical meaning of neural networks constructed as a result is not obvious. And in practice since it is difficult to the PID gains suitably lots of researches have been reported with respect to turning schemes of PID gains. A Neural Network-based PID control scheme is proposed, which extracts skills of human experts as PID gains. This controller is designed by using three-layered neural networks. The effectiveness of the proposed Neural Network-based PID control scheme is investigated through an application for a production control system. This control method can enable a plant to operate smoothy and obviously as the plant condition varies with any unexpected accident.

  • PDF