FPGA-Based Expert PID Controller for Buck DC-DC Converter

2013 ◽  
Vol 431 ◽  
pp. 215-220 ◽  
Author(s):  
Yao Chen ◽  
Chang Yuan Chang ◽  
Yan Yan
Keyword(s):  
Pid Controller ◽  
Stable Steady State ◽  
Buck Converters ◽  
Steady State Response ◽  
Control Laws ◽  
State Response ◽  
Digitally Controlled ◽  
Expert Theory ◽  
Expert Pid ◽  
Better Than

In this paper, an expert PID controller used for digitally controlled DC-DC buck converters is proposed. It is designed bycombing expert theory with traditional PID theory, basing on the controlled objects and the knowledge of control laws. The controller uses the expert experiences to regulate the PID parameters online according to the dynamic characteristics of the system. The simulation and practical results indicated that, comparing with conventional PID controller, the expert PID controller which has faster startup transient response, smaller overshoot and more stable steady-state response, is better than conventional PID controller. It is well fit for the demand of control system.

Research on Triple-Loop Control of BLDCM Based on Fuzzy PID

2014 ◽  
Vol 615 ◽  
pp. 395-401
Author(s):  
Yang Hua Li ◽  
Bo Mo ◽  
Ying He ◽  
Wen Jing Zhang
Keyword(s):  
Pid Controller ◽  
Step Response ◽  
Brushless Dc Motor ◽  
Control Methods ◽  
Steady State Response ◽  
Fuzzy Pid ◽  
Loop Control ◽  
Brushless Dc ◽  
State Response ◽  
Better Than

The brushless DC motor (BLDCM) has many advantages. This paper first analyzes the work principle of BLDCM and the control methods of the fuzzy PID, then designs a triple-loop controller based on the fuzzy PID BLDCM, finally makes a comparison of the traditional PID method and this new method. The experiment result shows that the result of the PID controller based on the BLDCM is much better than the traditional PID controller, the BLDCM improves the performance both on the step response of the position and the sinusoidal steady state response.

scholarly journals Design and Implementation of Pd based Controller for Accurate Tracking/Heading Angle

2018 ◽  
Vol 7 (4.5) ◽  
pp. 280
Author(s):  
Anil Kumar D ◽  
Dr. Hariprasad S A
Keyword(s):  
Pid Controller ◽  
Computation Time ◽  
Pi Controller ◽  
Steady State Response ◽  
Adaptive Controllers ◽  
State Response ◽  
Design And Implementation ◽  
Heading Angle ◽  
Predictive Controllers ◽  
Huge Challenge

The undesirable effects of the sea on the marine vessel became more noticeable when significant changes were introduced to the design and development of the ship. In order to accurately determine the heading angle of the ship various controllers like PD, pi,pid, predictive and adaptive controllers can be used. Predictive controllers provide accurate heading angles but the computation time becomes a huge challenge. PI controller promises stability but the steady state response time is more. In this work, we have made an attempt to evaluate PD, pi, and PID controller operation for a ship model and it has been inferred that PD is most suitable among the variants for producing the heading angle.

scholarly journals Low Voltage Induction Motor Traction Drive Self-Commissioning Technique with the Advanced Measured Signal Processing Procedure

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1700
Author(s):  
Mladen Vučković ◽  
Vladimir Popović ◽  
Djura Oros ◽  
Veran Vasić ◽  
Darko Marčetić
Keyword(s):  
Signal Processing ◽  
Induction Motor ◽  
Low Voltage ◽  
Experimental Tests ◽  
Measured Signal ◽  
Steady State Response ◽  
Traction Drive ◽  
State Response ◽  
Processing Procedure ◽  
Digitally Controlled

In this paper, the enhanced auto-tuning technique based on the injection of two sinusoidal test signals of different frequencies applicable on the low voltage induction motor self-commissioning process is presented. The main feature of the proposed technique resides in the advanced signal processing of measured IM voltage and current signals based on the cascaded delay signal cancelation structure. This processing algorithm enables the filtering of the symmetry-related fundamental harmonic from the non-symmetrical test signal excitation typical for the self-commissioning process. Based upon the steady-state response from the proposed filtering block, the simple yet effective calculation method derives the complete parameter set of the IM equivalent circuit. The technique is validated through the variety of computer simulations and experimental tests on the digitally controlled low voltage IM traction drive.

FORCED VIBRATION OF TIP-MASSED CANTILEVER WITH NONLINEAR MAGNETIC INTERACTIONS

2014 ◽  
Vol 06 (02) ◽  
pp. 1450015 ◽  
Author(s):  
GUO-CE ZHANG ◽  
LI-QUN CHEN ◽  
HU DING
Keyword(s):  
Steady State ◽  
Forced Vibration ◽  
Viscoelastic Model ◽  
Magnetic Interactions ◽  
Stable Steady State ◽  
Steady State Response ◽  
Response Curves ◽  
Approximate Methods ◽  
State Response ◽  
Tip Mass

This paper predicts the nonlinear relative motion of a cantilever with a tip mass and magnets based on a distributed-parameter model. The Kelvin viscoelastic model is used to account for the damping in the cantilever. Under the harmonic base excitation, the governing equation is deduced via a coordinate transformation linked to its static equilibrium. To qualitatively validate those results captured from the approximate methods, the finite difference method and the multi-scale method are respectively employed to determine the natural frequency and the steady-state response of forced vibration. It is analytically demonstrated that those modes uninvolved in a certain resonance actually have no effect on the response amplitude of the stable steady-state motion. The effects of forcing amplitude, viscoelastic damping, and tip mass on the steady-state response are detailed via the amplitude–frequency response curves. For the first time, the current works theoretically illustrated the conversion from the hardening-type behavior to the softening-type versus the augmenting magnetic force, as well as the opposing effect of different tip masses on the first mode and the higher modes.

The Design of Expert PID Parameter Optimized by Genetic Algorithm

2011 ◽  
Vol 130-134 ◽  
pp. 3091-3094
Author(s):  
Jia Tang Cheng ◽  
Wei Xiong ◽  
Li Ai
Keyword(s):  
Genetic Algorithm ◽  
Parameter Optimization ◽  
Pid Controller ◽  
Dynamic Performance ◽  
Parameter Tuning ◽  
Expert Pid ◽  
Parameter Values ◽  
Better Than

Aiming at the problems Expert PID parameter tuning for time-consuming, and the results are not necessarily the best. In this paper, genetic algorithm is introduced to the parameter optimization, finally get a set of optimal PID parameter values. In comparison with simulated experiments, the results show that the performance of the Designed to optimize the performance of optimization expert PID controller is better than conventional controller, can achieve good dynamic performance.

scholarly journals Vibration Equation of Fractional Order Describing Viscoelasticity and Viscous Inertia

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 850-856 ◽  
Author(s):  
Jun-Sheng Duan ◽  
Yun-Yun Xu
Keyword(s):  
Fractional Derivative ◽  
Fractional Order ◽  
Fractional Derivatives ◽  
Harmonic Excitation ◽  
Steady State Response ◽  
Vibration System ◽  
Derivative Operator ◽  
Vibration Equation ◽  
State Response ◽  
Frequency Relation

Abstract The steady state response of a fractional order vibration system subject to harmonic excitation was studied by using the fractional derivative operator ${}_{-\infty} D_t^\beta,$where the order β is a real number satisfying 0 ≤ β ≤ 2. We derived that the fractional derivative contributes to the viscoelasticity if 0 < β < 1, while it contributes to the viscous inertia if 1 < β < 2. Thus the fractional derivative can represent the “spring-pot” element and also the “inerterpot” element proposed in the present article. The viscosity contribution coefficient, elasticity contribution coefficient, inertia contribution coefficient, amplitude-frequency relation, phase-frequency relation, and influence of the order are discussed in detail. The results show that fractional derivatives are applicable for characterizing the viscoelasticity and viscous inertia of materials.

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