A Direct Digital Control Algorithm for Control of a Single Environmental Space

1985 ◽  
Vol 107 (4) ◽  
pp. 324-331 ◽  
Author(s):  
D. B. Cherchas ◽  
A. Abdelmessih ◽  
M. Townsend
Keyword(s):  
Mathematical Model ◽  
Moisture Content ◽  
Discrete Time ◽  
Digital Control ◽  
Control Algorithm ◽  
Environmental Space ◽  
Practical Performance ◽  
Simulation Results ◽  
Time Form ◽  
Direct Digital Control

A direct digital control algorithm for control of dry bulb temperature in a single environmental space is developed. The algorithm is based on a bilinear mathematical model, developed in the paper, of the response of the space dry bulb temperature and moisture content. The algorithm is somewhat unique in that it includes feedback and feedforward terms in a manner respecting the bilinear nature of the controlled process and as well, minimizes a practical performance index. The discrete time form of the algorithm is presented and simulation results given.

A general direct digital control algorithm for a class of linear systems

AIChE Journal ◽  
1978 ◽  
Vol 24 (2) ◽  
pp. 360-364 ◽  
Author(s):  
Rajeev Gautam ◽  
Rajakkannu Mutharasan
Keyword(s):  
Linear Systems ◽  
Digital Control ◽  
Control Algorithm ◽  
Direct Digital Control

The Study of Fuzzy/PID Compound Control Algorithms in Rubber Sulfuration Process Based on Sugeno Rules

2011 ◽  
Vol 221 ◽  
pp. 571-576
Author(s):  
Chun Tang Zhang ◽  
Zhen Zhu Yu
Keyword(s):  
Mathematical Model ◽  
Control Algorithm ◽  
Fuzzy Inference ◽  
Control Algorithms ◽  
Fuzzy Pid ◽  
Inference System ◽  
Pid Algorithm ◽  
Compound Control ◽  
Simulation Results ◽  
Nonlinear Delay

Aiming at rubber sulfuration of nonlinear, delay and complexity, a Fuzzy/PID compound control algorithm is proposed. The algorithm combined fuzzy inference system and PID algorithm, it has solved well the problem which is difficult to establish a precise mathematical model because of the uncertainties and complexities of rubber sulfuration. The simulation results indicate that the control algorithm is viable and effective.

Identification of Thermal Process Based on Relevance Vector Machine and Firefly Algorithm

2015 ◽  
Vol 742 ◽  
pp. 344-348
Author(s):  
Xiao Zhi Qiu ◽  
Guo Dong Bai ◽  
Bao Hua Huang ◽  
Wei Xu
Keyword(s):  
Mathematical Model ◽  
Traditional Method ◽  
Thermal Process ◽  
Control Algorithm ◽  
Firefly Algorithm ◽  
Relevance Vector Machine ◽  
High Accuracy ◽  
Support Vector ◽  
Simulation Results ◽  
Minimal Resource

Thermal process usually has the characteristics of nonlinearity and uncertainty, so it is difficult to establish the nonlinear model by the traditional method of describing the dynamic mathematical model of thermal process and accurately implement optimal control of thermal process. This paper provides an identification method of thermal process based on relevance vector machine and firefly algorithm, and the modeling results are compared with those by minimal resource allocation network and support vector regression. The simulation results show that the method is effective, and the model has high accuracy and can be directly used in control algorithm based on the model.

UPWARD JUMP OF A BIPED

2013 ◽  
Vol 10 (04) ◽  
pp. 1350032 ◽  
Author(s):  
YANNICK AOUSTIN ◽  
ALEXANDER FORMALSKII
Keyword(s):  
Mathematical Model ◽  
Control Algorithm ◽  
Stance Phase ◽  
Flight Phase ◽  
Human Data ◽  
Ankle Joints ◽  
Simulation Results ◽  
Upward Jump ◽  
Stick Diagram

This paper explores the vertical upward jumping of a planar biped. There are two stance phases and one flight phase in the jump. One stance phase takes place before the flight phase, another one after the flight phase. The stance phase before the flight phase is decomposed into several parts: A crouching, a thrust at the knees, a rotation of both feet (massless) around their toes. The second stance phase (after the flight phase) starts with a touchdown of the toes. It consists of a feet rotation, a touchdown of the whole soles and finally of a straightening up movement of the biped. A mathematical model for this kind of jump is developed. Torques are applied at the hip, knee and ankle joints. The control algorithm is designed to ensure the jump of the biped. The synthesis of the jumping process is supported by simulation, which gives consistent results with human data from biomechanical literature. The stick diagram of the jump derived from simulation results seems natural for the human jumping.

scholarly journals Discrete-Time Nonlinear Control of VSC-HVDC System

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
TianTian Qian ◽  
ShiHong Miao
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Discrete Time ◽  
Time Domain ◽  
Output Feedback ◽  
Control Algorithm ◽  
Sliding Mode ◽  
Mimo System ◽  
Discrete Control ◽  
Hvdc System

Because VSC-HVDC is a kind of strong nonlinear, coupling, and multi-input multioutput (MIMO) system, its control problem is always attracting much attention from scholars. And a lot of papers have done research on its control strategy in the continuous-time domain. But the control system is implemented through the computer discrete sampling in practical engineering. It is necessary to study the mathematical model and control algorithm in the discrete-time domain. The discrete mathematical model based on output feedback linearization and discrete sliding mode control algorithm is proposed in this paper. And to ensure the effectiveness of the control system in the quasi sliding mode state, the fast output sampling method is used in the output feedback. The results from simulation experiment in MATLAB/SIMULINK prove that the proposed discrete control algorithm can make the VSC-HVDC system have good static, dynamic, and robust characteristics in discrete-time domain.

Analysis and synthesis of converter control system of autonomous induction generator with field oriented control

2013 ◽  
Vol 62 (2) ◽  
pp. 267-279 ◽  
Author(s):  
Błażej Jakubowski ◽  
Krzysztof Pieńkowski
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Control Algorithm ◽  
Induction Generator ◽  
Field Oriented Control ◽  
Analysis And Synthesis ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Load Circuit

Abstract The paper presents the mathematical model of an autonomous induction generator with the AC load circuit and the converter control system of the voltage magnitude at the terminals of stator generator. The control algorithm and the structure of the control system are described. The simulation results of the control system are presented and discussed.

Modeling and Simulation of a Co-current Rotary Dryer

2016 ◽  
Vol 12 (2) ◽  
pp. 189-194 ◽  
Author(s):  
Zhi-gang Huang ◽  
Yun-xuan Weng ◽  
Nan Fu ◽  
Zong-qiang Fu ◽  
Dong Li ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Moisture Content ◽  
Mathematical Models ◽  
Modeling And Simulation ◽  
Air Temperature ◽  
Good Accuracy ◽  
Rotary Dryer ◽  
Simulation Results ◽  
The Mathematical Model

Abstract Mathematical models including mass and energy conservation were developed in order to predict the outlet particles temperature and moisture. As the inlet air temperature increased, the outlet particles temperature increased as well and the outlet particles moisture decreased quickly. The outlet particles temperature and moisture changed a little as a function of the speed of rotation at the low inlet air temperature, while the outlet particles temperature and moisture increased very apparently with the speed of rotation increased at the high inlet air temperature. The error of the simulation results compared to the experimental data showed good accuracy for particles temperature and moisture content. The mathematical model performs well to predict the outlet particles temperature and moisture content.

Implementation of a Feedback Direct-Digital Control Algorithm for a Heat Exchanger

1980 ◽  
Vol 19 (4) ◽  
pp. 546-550 ◽  
Author(s):  
Gerhard K. Giger ◽  
Donald R. Coughanowr ◽  
Werner Richarz
Keyword(s):  
Heat Exchanger ◽  
Digital Control ◽  
Control Algorithm ◽  
Direct Digital Control

Direct digital control of thyristor amplifiers

1969 ◽  
Vol 116 (5) ◽  
pp. 873 ◽  
Author(s):  
F. Fallside ◽  
R.D. Jackson
Keyword(s):  
Digital Control ◽  
Direct Digital Control
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