LYYTI—integrated design and control system

1990 ◽  
Vol 20 (4) ◽  
pp. 373-377
Author(s):  
Timo Teileri ◽  
Toivo Olkkola
Keyword(s):  
Control System ◽  
Integrated Design ◽  
And Control

scholarly journals Design and Performance Evaluation of a Low-Cost Autonomous Sensor Interface for a Smart IoT-Based Irrigation Monitoring and Control System

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3643 ◽  
Author(s):  
Abba ◽  
Namkusong ◽  
Lee ◽  
Crespo
Keyword(s):  
Control System ◽  
Low Cost ◽  
Integrated Design ◽  
Monitoring And Control ◽  
Sensors And Actuators ◽  
Irrigation Systems ◽  
Sensor Interface ◽  
Monitoring And Control System ◽  
Autonomous Sensor ◽  
And Control

Irrigation systems are becoming increasingly important, owing to the increase in human population, global warming, and food demand. This study aims to design a low-cost autonomous sensor interface to automate the monitoring and control of irrigation systems in remote locations, and to optimize water use for irrigation farming. An internet of things-based irrigation monitoring and control system, employing sensors and actuators, is designed to facilitate the autonomous supply of adequate water from a reservoir to domestic crops in a smart irrigation systems. System development lifecycle and waterfall model design methodologies have been employed in the development paradigm. The Proteus 8.5 design suite, Arduino integrated design environment, and embedded C programming language are commonly used to develop and implement a real working prototype. A pumping mechanism has been used to supply the water required by the soil. The prototype provides power supply, sensing, monitoring and control, and internet connectivity capabilities. Experimental and simulation results demonstrate the flexibility and practical applicability of the proposed system, and are of paramount importance, not only to farmers, but also for the expansion of economic activity. Furthermore, this system reduces the high level of supervision required to supply irrigation water, enabling remote monitoring and control.

scholarly journals Equivalent Linearization Methods for a Control System with Clutching Inerter Damper

2019 ◽  
Vol 9 (4) ◽  
pp. 688 ◽  
Author(s):  
Luyu Li ◽  
Qigang Liang ◽  
Han Qin
Keyword(s):  
Control System ◽  
Numerical Study ◽  
Integrated Design ◽  
Inertial Mass ◽  
Structural Vibration ◽  
Equivalent Linearization ◽  
Sdof System ◽  
Linearization Methods ◽  
Study Results ◽  
And Control

Inerter-based dampers have gained great popularity in structural vibration control. In this paper, equivalent linearization methods (ELMs) for a single-degree-of-freedom (SDOF) system with a clutching inerter damper (CID) are studied. The comparison of a SDOF system with a CID and an inertial mass damper (IMD) shows the advantage of the CID. Considering that the system with the CID is nonlinear, which is problematic for its performance evaluation and the integrated design of the structure and control system, three equivalent linearization methods based on different principles are proposed and discussed in this paper. The CID is considered to be equal to a combination of an IMD and a viscous damper. The equivalent inertance and damping can be calculated using the obtained formulas for all methods. In addition, all methods are compared in a numerical study. Results show that the ELM based on period and energy is recommended for small inertance-mass ratios.

An Integrated Design Approach of Local Control System of a Linear Drive Single Facet Heliostat

2016 ◽  
Author(s):  
M. M. Nageb ◽  
A. A. El-Samahy ◽  
M. A. Rady ◽  
A. M. A. Amin ◽  
R. H. Abd El-Hamid ◽  
...  
Keyword(s):  
Control System ◽  
System Performance ◽  
Integrated Design ◽  
Control Design ◽  
Drive System ◽  
Solar Power Plant ◽  
Central Receiver ◽  
Design Variables ◽  
Integrated Design Approach ◽  
And Control

In a central receiver solar power plant, heliostats are arranged with respect to the central receiver so as to reflect the rays from the sun onto the power tower with high precision by tracking the sun in both the azimuth and elevation directions. The master control system of a solar power plant consists of different levels. The first level is local control; it takes care of the positioning of the heliostats when the aiming point and the time are given to the system, and informs upper level about the status of the heliostats field. The second logic level makes some important dispatch calculations of heliostats field. The most popular linear two-axis local driving system of heliostat consists of two linear driving actuators, the driving mechanism with rotary joints, and the controller. Traditional methods for heliostat design are often based on a sequential approach in which the mechanical structure is designed first and then the control system is advised. In order to reach the optimal design of heliostats, an integrated design approach that concurrently considers the interactions between the mechanical and control subsystems is necessary. In this article, an integrated design methodology of heliostat drive system is presented. The methodology is based on modeling and simulation. The dynamic models that describe the behavior of the mechanical and control components are presented. These models involve mechanical and control design variables such as the motor parameters, power screw (including back lash), heliostat mass, load forces, and wind forces. Matlab, Solidwork, and Simulink are chosen to apply PID tracking control to heliostats, due to the ability to arbitrarily model complex mechanical systems, directly import properly constructed, third-party 3D CAD models, simulate integrated control, handle a variety of robotics nomenclature, and other features. The present methodology is employed for integrated design of a single facet small size heliostat with mirror area of 3 m2.The methods described in this article also show a way to rapidly simulate novel and complex heliostat geometries. Analysis of the heliostat drive system performance and dynamic characteristics according to mechanical and control design variables is conducted for the purpose of control system design and performance optimization. The drive system performance is evaluated in terms of positioning tracking errors, system response, and control system behavior. It is shown that the mechanical characteristics of the ball power screw actuator such as ball-screw diameter, lead, overall flexibility, stiffness, backlash, and inertia significantly influence the performance of drive system.

Configuration Design of Modular 3-PRS Parallel Robot and Dynamic Simulation Analysis

2011 ◽  
Vol 130-134 ◽  
pp. 347-352
Author(s):  
Jing Tao Lei
Keyword(s):  
Control System ◽  
Screw Theory ◽  
Simulation Analysis ◽  
Integrated Design ◽  
Parallel Robot ◽  
Configuration Design ◽  
Prototype System ◽  
Three Dimension ◽  
End Effector ◽  
And Control

This paper presented model-based integrated design technology for configuration design of modular 3-PRS parallel robot. The kinematics screws matrix and constraint screws matrix of the end effector were obtained based on screw theory, the constraints of the end effector were analyzed and the degree of freedom of the robot can be determined. The forward kinematics of the parallel robot was analyzed according to the geometric relationship of a kinematics chain. Three-dimension solid model of the parallel robot was designed. Afterwards, the co-simulation of the mechanical and control system of the parallel robot was studied by applying virtual prototype technology to optimize the parameters of mechanical structure and control system. The simulation results of kinematics and dynamics can be obtained, which will offer basis for developing the prototype system.

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