Design of Digital Wire Feed Control System Based on LPC2132

2013 ◽  
Vol 694-697 ◽  
pp. 2057-2060
Author(s):  
Jin Shui Shi
Keyword(s):  
Control System ◽  
Response Speed ◽  
Feed System ◽  
Change Rate ◽  
Interface Circuit ◽  
Analog Control ◽  
Feed Control ◽  
Control Principle ◽  
Wire Feed ◽  
Poor Stability

Aiming at the problem of MIG welding and considering the existing analog control wire feed system has the disadvantages of low response speed, low control accuracy and poor stability. This thesis designs a set of digital control wire feed system based on LPC2132 microprocessor and introduces the control principle of wire feed motor, CAN bus interface circuit and PID control algorithm. Under the condition of power grid voltage fluctuation and load change, we do a lot of experiments. The results show that: the wire feed change rate of designed system is very small, which not only meets the requirements of JB/T-1998.MIG/MAG arc welding standard, but also greatly improves the accuracy and stability of control system.

A Wire Feed Control System Based on Detecting Induced Electromotive Force of the Motor

2012 ◽  
Vol 569 ◽  
pp. 781-784
Author(s):  
Zhen Yang Lu ◽  
Peng Fei Huang ◽  
Yong Gang Zhang ◽  
Shao Jun Bai
Keyword(s):  
Electromotive Force ◽  
Feed Speed ◽  
Motor Speed ◽  
Feed System ◽  
Motor Current ◽  
Feed Control ◽  
Wire Feed Speed ◽  
The Given ◽  
The Relationship ◽  
Wire Feed

A stable and even wire feed speed is a guarantee of good quality welding. A new wire feed system, without any speed-measuring equipment, has been designed. And the motor current of this system works in a discontinuous state. When the motor current is zero, it detects the induced electromotive force; acquires the motor speed according to the relationship between the induced electromotive force and the motor speed; calculates and compares with the given speed then changes the duty cycle of the voltage added on the motor by PWM technology, that control the motor speed. Then a stable and even wire feed speed can be achieved. Verified by testing resistance, the change rate of the wire feed speed is slightly, which proves that the new system has good mechanical properties and a stable speed. Besides, it runs reliably.

Characteristic Analysis on Monodrome Modal Algorithm Control and Its Application

2007 ◽  
Vol 121-123 ◽  
pp. 1329-1332
Author(s):  
Xu Xiao Hu
Keyword(s):  
Control System ◽  
Large Time ◽  
Model Building ◽  
Time Lag ◽  
Response Speed ◽  
Model Parameters ◽  
Sampling Point ◽  
Characteristic Analysis ◽  
Feed System ◽  
Periodic Error

Nano drive parts based on thermal deformation is a new drive method, it can afford more than 5000N feeding force, but it has great time-lag change which make it very difficult to control, so it is critical to choose control method. In order to apply monodrome modal algorithm control (MMAC) to nano feed system having large time-lag, A new step by step fitting method by the experimental results to confirm model parameters of control system was presented, and the characteristics of control system was analyzed. Simulation results show that there is periodic error generated by model building, when the number of terms (N) adopted in predicative modal of non-parametric and monotonic is lesser, i.e. little N generated periodic error and there is a lager error when the sampling point are near N2N3N, but with the increasing of number of terms (N), error becomes little, so comprehensive information and error depend on the number of term (N). Predicative step is related to response speed and robust characteristic, there are longer response speed and better robust characteristic, when the predicative step is added. 15nm feeding accuracy was achieved by experiments, when the MMAC was used in nano drive parts having large time-lag change.

A Novel Vertical Lift Machine and its Precise Pose Control

2014 ◽  
Vol 989-994 ◽  
pp. 3105-3109
Author(s):  
Xiao Bo Liu ◽  
Xiao Feng Wei ◽  
Xiao Dong Yuan ◽  
Wei Ni
Keyword(s):  
Control System ◽  
Theoretical Analysis ◽  
Control Method ◽  
High Accuracy ◽  
Inverse Kinematic ◽  
Design Model ◽  
Pose Control ◽  
Vertical Lift ◽  
Position And Orientation ◽  
Control Principle

This paper deals with the design and theoretical analysis on a novel vertical lift machine which can vertically lift above 700 kg load up to 3.2 meters above the floor and located the load with high accuracy of position and orientation. Firstly the design model based on the installment demands of line-replaceable units (LRUs) is constructed. Then theoretical analysis including the number of degree of freedom of the lift machine, the inverse kinematic, the control principle, the lift platform pose error and the precise pose control method are conducted in the article. The validity of the design model and the effectiveness of the precise pose control system are confirmed by experiments using a prototype lift machine.

scholarly journals The linear quadratic regular algorithm-based control system of the direct current motor

2019 ◽  
Vol 10 (2) ◽  
pp. 768
Author(s):  
Trong-Thang Nguyen
Keyword(s):  
Control System ◽  
Direct Current ◽  
State Space Model ◽  
Linear Quadratic Regulator ◽  
Response Speed ◽  
Dc Motor ◽  
Linear Quadratic ◽  
Lqr Controller ◽  
Mathematical Equations ◽  
Feed Forward Controller

<span>This research aims to propose an optimal controller for controlling the speed of the Direct Current (DC) motor. Based on the mathematical equations of DC Motor, the author builds the equations of the state space model and builds the linear quadratic regulator (LQR) controller to minimize the error between the set speed and the response speed of DC motor. The results of the proposed controller are compared with the traditional controllers as the PID, the feed-forward controller. The simulation results show that the quality of the control system in the case of LQR controller is much higher than the traditional controllers. The response speed always follows the set speed with the short conversion time, there isn't overshoot. The response speed is almost unaffected when the torque impact on the shaft is changed.</span>

Research on Simulation and Modeling of Split Double-Rotor Motor Based on Indirect Vector Control

2011 ◽  
Vol 317-319 ◽  
pp. 672-677
Author(s):  
Bin Wei ◽  
Ji Bin Hu ◽  
Zeng Xiong Peng
Keyword(s):  
Control System ◽  
Vector Control ◽  
Stable State ◽  
System Model ◽  
Dynamic Capability ◽  
Simulation And Modeling ◽  
Simulation Results ◽  
Set Up ◽  
Vector Control System ◽  
Control Principle

A novel vector control system of the split double-rotor motor based on indirect vector control principle has been proposed. The mathematic models of the primary machine and the secondary machine are set up respectively. Through the coupling of the two models, the system model of the split double-rotor motor is build. Matlab software is used for the simulation and analysis of this indirect vector control system. According to the simulation results, the validity of system model is proved with nicer static and dynamic capability, and without steady-state error in stable state. These are important to analyze and design the double-rotor motor. Furthermore, the results provide the basis for simulation and apply of double-rotor motor in HEV.

scholarly journals Study results of the on-board weight control system as exemplified by feed mixture preparation using a trailed feed mixer-and-distributor

2020 ◽  
Vol 175 ◽  
pp. 03006
Author(s):  
Vladimir Sirovatka ◽  
Alexey Dorokhov ◽  
Vladimir Kirsanov ◽  
Dmitriy Pavkin ◽  
Evgeniy Nikitin
Keyword(s):  
Control System ◽  
Technological Process ◽  
Weight Control ◽  
Response Speed ◽  
Feed Mixture ◽  
Human Machine Interaction ◽  
Feeding Management ◽  
Dosing Error ◽  
Study Results ◽  
Recorded Data

The study purpose is to determine the operational efficiency of the on-board weight control system using the technological process of preparing the feed mixture as an example. The Daily TMR Manager, an on-board weight control system, consisting of communication components, digital indicators with information on the display installed in the operator’s cab (of the mixer-and-distributor) and loader operator, and the “Feeding Management” software package were used as a means of controlling the technological process of preparing the feed mixture. The recorded data were transmitted via Internet resources to a cloud storage that provides round-the-clock access to information. The process of evaluating the performance of the weighing system involved loading stalky bulk and loose concentrated components of the feed mixture. Analyzing the evaluation results of the weight control protocols with the recorded data, the authors have determined the influence of human-machine interaction on accuracy, and revealed that the material dosing error increases inversely with the dosed material mass. To improve the operational characteristics of on-board weight control systems it is recommended to install weight sensors on the loader boom to reduce the error when dispensing materials and increase the operator’s response speed.

Research of Automatic Welding Machine Controlling System Based Single-Chip

2012 ◽  
Vol 214 ◽  
pp. 700-704
Author(s):  
Jin Hu Song
Keyword(s):  
Production Efficiency ◽  
Feed Speed ◽  
Automatic Welding ◽  
Single Chip ◽  
Interface Circuit ◽  
Welding Machine ◽  
Welding Technology ◽  
Controlling System ◽  
Wire Feed Speed ◽  
Wire Feed

In this paper, a scheme for the structure and controlling design of an all-position automatic welding machine is studied, and also the automatic welding systemis explored in depth. In this system, the C8051F020 single chip is used as the controller and the DC servo-motor as the executive component. Through the interface circuit and software program of the single chip, the system can control and harmonize the wire-feed speed as well as the tread and swing of the welding tractor, and can meet the needs of the all-position welding technology, hence realizing the automation of welding, and increasing the welding production efficiency.

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