scholarly journals Automated Irrigation and Fertigation System Applying Sensing Technology

Author(s):  
Mahyuzie Jenal ◽  
◽  
Hakimi Zikri Nasirin ◽  
Nur Aida Nabilah Mohd Razali @ Kamaruddin ◽  
Syed Amiruddin Hilmi Sayed Mohd Albakir ◽  
...  

Internet of Things (IoT) is the most discussed topic nowadays and it finds many applications in various industries. The development of efficient agricultural systems has become essential to address the challenges of feeding the enormous and ever-increasing population around the globe. One way of dealing with this is to expand agricultural production standard and quantity. An integrated IoT system with irrigation and finishing on the market was missing. To increase production efficiency, farmers shall collect massive data from various devices. The system's effectiveness depends on the performance of the sensor under various climate changes. The network and a closed-loop feedback system need to be connected to the system for maximum operational capacity. The module of the Soil Moisture Sensor and the MCU ESP8266 V2 MCU Node, the float switch and the 5V Optocoupler relay module are used in this project. The remote control of the system is a mobile application. If the moisture level in the soil reaches the desired value, it will stop water supply. The project could be expended on a larger scale in the future and the system may also be developed with solar energy rather than batteries.

2013 ◽  
Vol 850-851 ◽  
pp. 636-639
Author(s):  
Jian Hua Chen ◽  
Xi Hui Mu ◽  
Feng Po Du ◽  
Kai Lv

Based on the analysis of power matching between diesel engine and HST, a simulation model was built by AMEsim. By using of simulation, the result of speed characteristic in closed loop feedback system was analyzed. The results show that power matching and joint control between diesel engine and HST is an effective way to improve the vehicles matching identity and ensure its working point in the economic region.


2008 ◽  
Vol 14 (2) ◽  
pp. 118-121 ◽  
Author(s):  
S. G. Pierzynowski ◽  
H. Håkansson ◽  
L. Ljunggren ◽  
L. Mårtensson ◽  
L. Olsson

2015 ◽  
Vol 31 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Carlos Eduardo de Araujo ◽  
Paulo José Abatti ◽  
Cláudio Da Cunha ◽  
Alexander Gómez ◽  
Patrícia Andréia Dombrowski

2014 ◽  
Vol 496-500 ◽  
pp. 1698-1701
Author(s):  
Ying Sun ◽  
Wei Yan

From a practical point of view, a closed-loop feedback system that is unstable is of little value. Many control systems are subject to extraneous disturbance signals that cause the system to provide an inaccurate output. The Routh-Hurwitz criterion ascertains the absolute stability of a system by determining whether any of the roots of the characteristic equation lie in the right half of the s-plane. This study concludes with a stability analysis based on the Routh-Hurwitz method.


Sign in / Sign up

Export Citation Format

Share Document