scholarly journals One-Dimensional Control System for a Linear Motor of a Two-Dimensional Nanopositioning Stage Using Commercial Control Hardware

Micromachines ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 421 ◽  
Author(s):  
Lucía Díaz Pérez ◽  
Marta Torralba Gracia ◽  
José Albajez García ◽  
José Yagüe Fabra
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Dynamic Properties ◽  
Linear Motor ◽  
Two Dimensional ◽  
Precision Engineering ◽  
Loop Control ◽  
One Dimensional ◽  
Linear Motors ◽  
Custom Made

A two-dimensional (2D) nanopositioning platform stage (NanoPla) is in development at the University of Zaragoza. To provide a long travel range, the actuators of the NanoPla are four Halbach linear motors. These motors present many advantages in precision engineering, and they are custom made for this application. In this work, a one-dimensional (1D) control strategy for positioning a Halbach linear motor has been developed, implemented, and experimentally validated. The chosen control hardware is a commercial Digital Motor Control (DMC) Kit from Texas Instruments that has been designed to control the torque or the rotational speed of rotative motors. Using a commercial control hardware facilitates the applicability of the developed control system. Nevertheless, it constrains the design, which needs to be adapted to the hardware and optimized. Firstly, a dynamic characterization of the linear motor has been performed. By leveraging the dynamic properties of the motor, a sensorless controller is proposed. Then, a closed-loop control strategy is developed. Finally, this control strategy is implemented in the control hardware. It was verified that the control system achieves the working requirements of the NanoPla. It is able to work in a range of 50 mm and perform a minimum incremental motion of 1 μm.

scholarly journals 2D Positioning Control System for the Planar Motion of a Nanopositioning Platform

2019 ◽  
Vol 9 (22) ◽  
pp. 4860 ◽  
Author(s):  
Lucía Díaz-Pérez ◽  
Marta Torralba ◽  
José Antonio Albajez ◽  
José Antonio Yagüe-Fabra
Keyword(s):  
Control System ◽  
Laser System ◽  
Linear Motor ◽  
Planar Motion ◽  
Two Dimensional ◽  
Positioning Control ◽  
Linear Motors ◽  
Generic Solution ◽  
Custom Made ◽  
Planar Movement

A novel nanopositioning platform (referred as NanoPla) in development has been designed to achieve nanometre resolution in a large working range of 50 mm × 50 mm. Two-dimensional (2D) movement is performed by four custom-made Halbach linear motors, and a 2D laser system provides positioning feedback, while the moving part of the platform is levitating and unguided. For control hardware, this work proposes the use of a commercial generic solution, in contrast to other systems where the control hardware and software are specifically designed for that purpose. In a previous paper based on this research, the control system of one linear motor implemented in selected commercial hardware was presented. In this study, the developed control system is extended to the four motors of the nanopositioning platform to generate 2D planar movement in the whole working range of the nanopositioning platform. In addition, the positioning uncertainty of the control system is assessed. The obtained results satisfy the working requirements of the NanoPla, achieving a positioning uncertainty of ±0.5 µm along the whole working range.

LIM Control Strategy Supported by Genetic Algorithm with Unbalanced AC Source

2018 ◽  
Vol 19 (4) ◽  
Author(s):  
Matheus Garcia Soares ◽  
Afonso Bernardino Almeida Junior ◽  
Thiago Berger Canuto Alves ◽  
Luciano Martins Neto
Keyword(s):  
Computational Model ◽  
Control Strategy ◽  
Induction Motors ◽  
Linear Motor ◽  
Open Loop ◽  
Open Loop Control ◽  
Loop Control ◽  
Linear Motors ◽  
Low Speeds ◽  
Supply Voltages

AbstractThis work presents the improvement of an open loop control strategy for linear induction motors operating at low speeds. The improvement is provided through the application of genetic algorithms in determining unbalance factors of the supply voltages of the linear motor. For this, a computational model of the linear motor was used as the evaluation function. The computational model was developed based on the equations of the linearized induction motor. The proposed methodology is validated through the comparison between computational results and experimental data performed in a linear motor prototype. This methodology allows to evaluate the influence of the unbalance of the supply voltages for linear motors working at low speeds.

Intelligent Operation Control for the Fused Magnesia Production

2011 ◽  
Vol 391-392 ◽  
pp. 1450-1454
Author(s):  
Yong Jian Wu ◽  
Ping Zhou ◽  
Pin Shang ◽  
Tian You Chai
Keyword(s):  
Control System ◽  
Intelligent Control ◽  
Control Strategy ◽  
Control Method ◽  
Level Control ◽  
Loop Control ◽  
Intelligent Control System ◽  
Technical Requirements ◽  
Operation Control ◽  
Lower Loop

An electro-fused magnesia furnace (EFMF) is used to produce electro-fused magnesia. Due to the complex dynamic characteristics of the EFMF production process, it is difficult to achieve the satisfactory control performances only by the independent conventional control method. As a result, the lower loop control with manual operations is still widely used in practice. However, the manual operation cannot ensure that the actual production qualities and the energy consumption of unit production meet the technical requirements all the time. In this paper, an intelligent operation control strategy is developed for the EFMF to automatically adjust the setpoints of the lower level control system. Based on the proposed intelligent control strategy, an intelligent control system for the EFMF is built and implemented on site. Industrial application has demonstrated that the intelligent control system can achieve reliable, accurate and timely control performances.

Research on Control Strategy of Integrated Gasification Humid Air Turbine Cycle

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Tingting Wei ◽  
Dengji Zhou ◽  
Di Huang ◽  
Shixi Ma ◽  
Wang Xiao ◽  
...  
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Design Method ◽  
Control Mode ◽  
Humid Air ◽  
Loop Control ◽  
System A ◽  
Air Turbine ◽  
Integrated Gasification ◽  
Strategy Design

Integrated gasification humid air turbine (IGHAT) cycle is an advanced power generation system, combining gasification technology and humid air turbine (HAT) cycle. It draws great attention in the energy field considering its high specific power, high efficiency, and low emission. There are only a few HAT cycle plants and IGHAT cycle is still on the theory research stage. Therefore, the study on control strategies of IGHAT cycle has great significance in the future development of this system. A design method of control strategy is proposed for the unknown gas turbine systems. The control strategy design is summarized after IGHAT control strategy and logic is designed based on the dynamic simulation results and the operation experience of gas turbine power station preliminarily. Then, control logic is configured and a virtual control system of IGHAT cycle is established on the Ovation distribution control platform. The model-in-loop control platform is eventually set up based on the interaction between the simulation model and the control system. A case study is implemented on this model-in-loop control platform to demonstrate its feasibility in the practical industry control system. The simulation of the fuel switching control mode and the power control mode is analyzed. The power in IGHAT cycle is increased by 24.12% and 32.47%, respectively, compared to the ones in the simple cycle and the regenerative cycle. And the efficiency of IGHAT cycle is 1.699% higher than that of the regenerative cycle. Low component efficiency caused by off-design performance and low humidity caused by high pressure are the main limits for system performance. The results of case study show the feasibility of the control strategy design method proposed in this paper.

Permanent Magnet Linear Synchronous Motor Servo System Based on DSP

2011 ◽  
Vol 103 ◽  
pp. 388-393
Author(s):  
Dong Qing Hao ◽  
Lian Qing Zhu ◽  
Zhi Kang Pan ◽  
Yang Kuan Guo ◽  
Qing Shan Chen
Keyword(s):  
Control System ◽  
Servo System ◽  
Linear Motor ◽  
Servo Control ◽  
Feedback Signal ◽  
Power Module ◽  
Current Feedback ◽  
Loop Control ◽  
Servo Control System ◽  
Communication Module

Linear motor has a lot of merits, such as simple structure, fast dynamic response, high localization accuracy and great speed capability. It improves the dynamic sensitivity, accuracy and reliability of modern machining. On the basis of analyzing structure trait and operational principle of linear motor, a position servo control system of linear motor based on DSP is designed. This system is constructed according to vector control model. It consists of a control module, a detection module, a power driver module and a communication module. Closed-loop control strategies based on position feedback, speed feedback and current feedback are adopted. The Space Vector Pulse Width Modulation (SVPWM) integrates an inverter and a motor into a whole, which can make the full digital real-time controlling of PMLSM. TMS320LF2812 is selected as the controller in this control system, which can process the feedback signal of the detection module and output motor-droved current signals. The position and speed detection of linear motor is realized by a QEP circuit with a grating bar. Application of intelligent power module (IPM) simplifies the rectifier circuit and protects the circuit. The communication module is used to make connection between the servo system and a PC. The experimental results show that the servo control system proposed in this paper has reliable structure, good control performance, and simplicity in operation.

scholarly journals Vector Control Strategy for Halbach Linear Motor Implemented in a Commercial Control Hardware

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 232 ◽  
Author(s):  
Lucía Díaz-Pérez ◽  
José Albajez ◽  
Marta Torralba ◽  
José Yagüe-Fabra
Keyword(s):  
Vector Control ◽  
Control Strategy ◽  
Experimental Validation ◽  
Hardware Implementation ◽  
Target Position ◽  
Vertical Force ◽  
Research Projects ◽  
Precision Engineering ◽  
Linear Motors ◽  
Vector Control Strategy

Halbach linear motors are selected as actuators in positioning stages because they present numerous advantages in precision engineering. These motors generate a horizontal and a vertical force. Whereas the horizontal force is used to perform the movement, the vertical force can be leveraged for the levitation of the moving part of the stage. This paper proposes a vector control strategy that enables the positioning of the motor while regulating the generated vertical force. In contrast to other research projects, this work implements the control strategy in a commercial control hardware. The use of commercial hardware facilitates the applicability and replication of the developed control strategy. The selected hardware is a generic Digital Motor Control Kit of Texas Instruments. The hardware implementation of the control strategy is analysed in detail in order to understand and optimize the control system. The developed control is first validated by simulation, where the error contributors are included. Then, an experimental validation is carried out. The results demonstrate that the control strategy enables the positioning of the motor along its complete operating range and the regulation of the vertical force when the motor is static, as well as while it is moving to a target position.

Control System Design of Rotary Inverted Pendulum

2014 ◽  
Vol 608-609 ◽  
pp. 766-769
Author(s):  
Li Qian Wang ◽  
Kai Hu
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Inverted Pendulum ◽  
Controller Design ◽  
Single Stage ◽  
Test Results ◽  
Final Test ◽  
Loop Control ◽  
Classical Control ◽  
Rotary Inverted Pendulum

In this paper we study the control system of single stage rotary inverted pendulum, and put forwards the controller design based on the core of STM32. In control strategy we use the classical control theory-PID control algorithm, which realizes the closed-loop control of rotating arm and swing rod for the single stage rotary inverted pendulum. The final test results show that the control strategy is effective.

Research on Control Strategy of Integrated Gasification Humid Air Turbine Cycle

2017 ◽  
Author(s):  
Tingting Wei ◽  
Dengji Zhou ◽  
Di Huang ◽  
Shixi Ma ◽  
Huisheng Zhang ◽  
...  
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Design Method ◽  
Control Mode ◽  
Humid Air ◽  
Loop Control ◽  
System A ◽  
Air Turbine ◽  
Integrated Gasification ◽  
Strategy Design

Integrated Gasification Humid Air Turbine (IGHAT) cycle is an advanced power generation system, combining gasification technology and Humid Air Turbine (HAT) cycle. It draws great attention in the energy field considering its high specific power, high efficiency and low emission. There are only a few H AT cycle plants and IGHAT cycle is still on the theory research stage. Therefore, the study on control strategies of IGHAT cycle has great significance in the future development of this system. A design method of control strategy is proposed for the unknown gas turbine systems. The control strategy design is summarized after IGHAT control strategy and logic is designed based on the dynamic simulation results and the operation experience of gas turbine power station preliminarily. Then, control logic is configured and a virtual control system of IGHAT cycle is established on the Ovation distribution control platform. The model-in-loop control platform is eventually set up based on the interaction between the simulation model and the control system. A case study is implemented on this model-in-loop control platform to demonstrate its feasibility in the practical industry control system. The simulation of the fuel switching control mode and the power control mode is analyzed. The power in IGHAT cycle is increased by 24.12% and 32.47% respectively, compared to the ones in the simple cycle and the regenerative cycle. And the efficiency of IGHAT cycle is 1.699% higher than that of the regenerative cycle. Low component efficiency caused by off-design performance and low humidity caused by high pressure are the main limits for system performance. The results of case study show the feasibility of the control strategy design method proposed in this paper.

Novel Design for LC-VSI Double-Loop Control System of Microsources in Microgrid Based on Typical System Setting Method

2014 ◽  
Vol 556-562 ◽  
pp. 2436-2439
Author(s):  
Jia Ming Li ◽  
Peng Li
Keyword(s):  
Control System ◽  
Power Control ◽  
Control Strategy ◽  
Voltage Source ◽  
Double Loop ◽  
Loop Control ◽  
Typical System ◽  
Loop Control System ◽  
Lc Filter ◽  
Novel Design

Control strategy of inverter is the foundation of microsource’s power control. Based on a typical system setting method, double-loop control system of LC filter and inverter for voltage-source inverter in microgrid is designed. The feasibility is verified via the simulation.

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