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In considering the saturation and dead zone nonlinearity as well as the time-variability and the time lag existed in direct drive volume control system, the traditional PID controller has the problems of parameter tuning difficulty and poor adaptability. This paper sets up a fuzzy PID control algorithm by pulling in fuzzy control theory, which realizes self-tuning PID parameters and effectively weaken...
This paper proposed a PID method to control a driven pendulum. Driven pendulum is a suspended pendulum, which has a motorized propeller at the end of the stick. So it can be controlled with controlling the voltage given to DC motor. The characteristics of the transient response of this system such as overshoots and settling time are not acceptable. For example the settling time of this system is upwards...
In this paper conventional proportional-integral-derivative (PID) controller and different type of fuzzy logic controllers are used for controlling the inverted pendulum. The fuzzy logic controller is designed in various forms in the Matlab-Simulink environment with Mamdani type fuzzy inference system. The Inverted Pendulum system (also called “cart-pole system”) is a classic example of a nonlinear...
PID control is widely used to control stable processes; however, its application to integrating unstable processes is less common. Integrating unstable process is often approximated by an integrating-unstable-first-order-plus-dead-time model based on which the simple analytical tuning formulae of PD control are derived to meet gain and phase margin (GPM) specifications. The previous tuning approach...
The design of a self tuning Static Var Compensator (SVC) based on pole placement method is presented. In order to maintain good damping characteristics when there is a drastic change in system operating condition, the gain settings are adapted in real time based on the continuously measured system inputs and outputs. The new self tuning proportional integral derivative (PID) control can provide better...
The aim of this paper is to present a method for on-line tuning of PID controller for stable processes. Without breaking closed-loop control, an explicit process model is developed from a single relay test and then controller gains are re-tuned non-iteratively to improve the performance. An explicit tuning rules are derived with special emphasis on minimizing the control efforts. Examples are given...
Recently, the performance of the DSP and FPGA is developed remarkably. So, fully digital control is enabled in switch mode power supplies. However, in many cases, the control system is built by very complicatedly and very difficult theories such as the adaptive control. Furthermore, in most popular PID control, its design method of the parameters is not clear, so derivation of the optimal parameters...
In this paper, a novel control structure method is proposed to obtain superior output response of the process in the presence of measurement noise and load disturbance. The derivative controller in the inner loop is aimed to stabilize the unstable SOPDT process and also reduce the effect of derivative kick and noise. Four parameters PID with series lead-lag filter are designed based on IMC principle...
This paper presents a method to design and control a two-wheeled self-balancing robot and it focus on hardware description, signal processing, discrete Kalman filter algorithm, system modelling and PID backstepping controller design. In the system, signals from angle sensors are filtered by a discrete Kalman filter before being fed to the PID backstepping controller. The objectives of the proposed...
This paper presents the investigation on a system model for the stabilisation of a Magnetic Levitation System (Maglev's). Furthermore, the investigation on Proportional Integrated Derivative Controller (PID) also reported here. In this paper shows to design both PID and Fuzzy Logic Control (FLC) based on the system model. Maglev's give the contribution in industry and this system has reduce the power...
Comparing with typical closed loop PID control strategy, dynamic matrix control (DMC) strategy performs well in tracking system and could also be directly applied to plant model with time-delay, however its ability of anti-interference is much weaker than typical PID control strategy. In this paper, DMC-PID cascade control strategy is proposed combined with the advantages of these two algorithms and...
The paper introduces the theoretic analysis of the electro-hydraulic servo system, and makes certain the structure of the Fuzzy controller, input or output variable, the quantitative variable, the proportional variable and fuzzy reasoning theorem based on the manipulative experiment. The model and simulation of the system are established with Fuzzy Toolbox in MATLAB. With the results of the simulation...
In this paper, the impact of network induced timedelay on Networked Control System (NCS) and the weights of Sensor-Controller time-delay and Controller-Actuator time-delay is analyzed by simulations. Furthermore, the effects of plant parameters on stability region of PID controllers in first-order and second-order systems with time-delay is also studied. Finally, an open-loop zero was inserted into...
The way of modeling and simulation for Active-Disturbance-Rejection-Controller (ADRC) is discussed by masking subsystem and building user custom library in Matlab/Simulink, after studying the basic principle and structure of ADRC. In this way, the programming workload of researching ADRC can be reduced, and the complex blocks group in Simulink can simplify. The simulation example and results show...
The gyro stabilized platform control is required to isolate the line of sight (LOS) from the disturbance and vibration of carrier and ensure pointing and tracking for target in electro-optical tracking system. A compound adaptive fuzzy PID control with hysteresis-band switching is developed for this servo system with nonlinear property and some uncertainties. Here, in the adaptive fuzzy controller,...
The single freedom magnetic levitation ball system is the base of magnetic products, it is essential to study the magnetic levitation ball system. After linearizing and analyzing the nonlinear model of Maglev system, the schema of the human-simulated intelligent control(HSIC) is proposed to deal with the nonlinear and unstable system , moreover the master control algorithms and the parameter self-tuning...
In this paper, the advantages and disadvantages of traditional PID controller and fuzzy logic controller algorithm were analyzed on the control characteristics of electric furnace. According to the intelligent control theory, fuzzy PID (Fuzzy-PID) compound control was selected to realize intelligent control of electric furnace with two-input and two-output system. Based on real temperature control...
Coal ball mill pulverizing system is a multiple-input multiple-output (MIMO) system characterized with strong couplings and disturbances. In the coal ball mill control system, the three loops possess different dynamics with remarkable lag times. In this paper, we proposed a mixed control scheme based on loop priority (namely the outlet temperature loop, the inlet pressure loop, the pressure difference...
DC-DC Converters widely used in regulated switch mode power supplies and in dc motor drive applications. Often the input to these converters is an unregulated dc voltage and therefore it will fluctuate due to changes in Line-Voltage magnitude. In this paper the PID controller has been used to overcome this problem. The controller parameters are optimized by using the Bacterial Foraging Algorithm (BFA)...
A DC motor speed regulating without speed sensor driven by TRIAC is proposed. The motor speed is transferred to phase width with a converter. The mathematic model of PID is established. And the action factors of PID are autotuned online according to the relationship between speed and phase width. Experiments show that the improved autotuning PID control enhances the stability of the motor speed in...
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