scholarly journals DESIGN AND TEST EVALUATION OF THE SUBSOILER EQUIPPED WITH TILLAGE DEPTH MONITORING AND CONTROL SUBSOILING ASSEMBLIES

2021 ◽  
pp. 139-152
Author(s):  
Shangyi Lou ◽  
Jin He ◽  
Hongwen Li ◽  
Qingjie Wang ◽  
Caiyun Lu ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Hydraulic Cylinder ◽  
Soil Disturbance ◽  
Performance Comparison ◽  
Monitoring And Control ◽  
Magnetic Exchange ◽  
Single Row ◽  
Tillage Depth ◽  
The Stability ◽  
And Control

Aiming at solving problems that the variation of tillage depth between rows and within rows caused by the surface undulation was great, the lateral stability of tillage depth obtained by the method of adjusting at the three-point suspension was poor, and lack of subsoilers with the function of accurate detection and adjustment of single row tillage depth, a method of independent control of single row tillage depth based on ultrasonic sensor detection and hydraulic adjustment was proposed. And the tillage depth monitoring and control subsoiling assembly and the subsoiler equipped with subsoiling assemblies were designed. The key structural parameters of the hydraulic cylinder and the model of the three-position four-way magnetic exchange valve were determined. The subsoiling quality and performance comparison tests were conducted, and the results showed that the mean value of the variable coefficient of soil hardness, looseness of soil and coefficient of soil disturbance were 52.23%, 32.55% and 62.15%, respectively, and the stability coefficient of tillage depth was 92.43%, which all met the subsoiling operation requirements. The standard deviation of tillage depth belonged to the method of independent adjustment of single row and unified adjustment of each row were 38.315mm and 51.521mm, respectively. The subsoiler equipped with tillage depth monitoring and control subsoiling assemblies designed in this paper was capable of significantly improving the stability of tillage depth between rows and within rows.

scholarly journals Current Knowledge and Future Directions for Improving Subsoiling Quality and Reducing Energy Consumption in Conservation Fields

Agriculture ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 575
Author(s):  
Shangyi Lou ◽  
Jin He ◽  
Hongwen Li ◽  
Qingjie Wang ◽  
Caiyun Lu ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Cover Crops ◽  
Current Knowledge ◽  
High Energy ◽  
Field Application ◽  
Research Progress ◽  
Monitoring And Control ◽  
Future Directions ◽  
Tillage Depth ◽  
And Control

Subsoiling has been acknowledged worldwide to break compacted hardpan, improve soil permeability and water storage capacity, and promote topsoil deepening and root growth. However, there exist certain factors which limit the wide in-field application of subsoiling machines. Of these factors, the main two are poor subsoiling quality and high energy consumption, especially the undesired tillage depth obtained in the field with cover crops. Based on the analysis of global adoption and benefits of subsoiling technology, and application status of subsoiling machines, this article reviewed the research methods, technical characteristics, and developing trends in five key aspects, including subsoiling shovel design, anti-drag technologies, technologies of tillage depth detection and control, and research on soil mechanical interaction. Combined with the research progress and application requirements of subsoiling machines across the globe, current problems and technical difficulties were analyzed and summarized. Aiming to solve these problems, improve subsoiling quality, and reduce energy consumption, this article proposed future directions for the development of subsoiling machines, including optimizing the soil model in computer simulation, strengthening research on the subsoiling mechanism and comprehensive effect, developing new tillage depth monitoring and control systems, and improving wear-resisting properties of subsoiling shovels.

scholarly journals A fuzzy based parametric monitoring and control algorithm for distinctive loads to enhance the stability in rural islanded microgrids

2020 ◽  
Vol 33 (2) ◽  
pp. 227-241
Author(s):  
Fawad Azeem ◽  
Ghous Narejo
Keyword(s):  
Control Algorithm ◽  
Fuzzy Controller ◽  
Load Control ◽  
Prolonged Storage ◽  
Monitoring And Control ◽  
Skilled Manpower ◽  
Parameter Variations ◽  
Load Monitoring ◽  
The Stability ◽  
And Control

Effective monitoring and control of isolated rural microgrid in the developing world is challenging. The modern communication and monitoring is difficult to handle in such communities due to a complicated approach to the area, lack of modern facilities and unavailability of skilled manpower. Implementation of a microgrid in such areas using intermittent renewable sources and limited storage is challenging. Uncontrolled load consumption leads to the system-wide outages due to prolonged storage utilization in peak hours and is referred here as battery storage stress hours (BSSH). This research is focused to study and analyze the behavior of parametric load monitoring and control algorithm that could control the distinctive load of the microgrid during BSSH. In the proposed algorithm, the residential loads are distinctively controlled while utilizing the three locally available parameters that are the state of the charge of storage, solar irradiations and ambient temperature. In other words, the natural parameter variations have been uniquely utilized as a monitoring tool for load control. The fuzzy controller takes a decision for the activation or deactivation of any load based on the three parameters variation ranges. It is observed from the simulation and experimental results that while only utilizing locally available parameters the effective load control is possible.

scholarly journals A Tillage Depth Monitoring and Control System for the Independent Adjustment of Each Subsoiling Shovel

Actuators ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 250
Author(s):  
Shangyi Lou ◽  
Jin He ◽  
Caiyun Lu ◽  
Peng Liu ◽  
Hui Li ◽  
...  
Keyword(s):  
Control System ◽  
Response Time ◽  
Transient Response ◽  
Field Experiments ◽  
System Control ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
The Mean ◽  
Tillage Depth ◽  
And Control

Subsoiling can break the compacted hardpan without turning or mixing soil layers. It has significant advantages in improving soil structure, promoting rainwater infiltration, and increasing air permeability of soil. The soil compacted hardpan will not be completely broken and more power consumption will be generated unless the desired tillage depth is obtained. However, due to uneven surface between and within each row of subsoiling shovel in the field, the existing adjustment methods, adjusting via the lifting device of the whole machine or a group of tillage components, cannot ensure each subsoiling shovel avoiding undesired tillage depth. Therefore, a tillage depth monitoring and control system for the independent adjustment of each subsoiling shovel was developed, and the methods of detecting, adjusting, displaying, and recording tillage depth were described. Field experiments were conducted to evaluate detecting accuracy, stability of tillage depth, transient response time, and advantages. The results showed that the value obtained by sensor differed from manual measurement at the speed of 3 km/h, 4 km/h, and 5 km/h averagely by 8.28%. The mean value of the coefficient of the tillage depth stability at three speeds were all greater than 94%. The mean transient response time was 0.6 s. The standard deviation of tillage depth obtained under system control was 38.31, which was less than the 51.52 obtained by only adjusting on the three-point suspension. The subsoiler equipped with this system was capable of obtaining a desired tillage depth of each subsoiling shovel in every second.

Analysis and Design of Open Remote Monitor and Control System

2013 ◽  
Vol 722 ◽  
pp. 393-396
Author(s):  
Xiang Chen ◽  
Hui Huang Pi ◽  
Lin Lin Zhou
Keyword(s):  
Control System ◽  
Real Time ◽  
Monitor System ◽  
Monitoring And Control ◽  
Time Data ◽  
Remote Monitor ◽  
Analysis And Design ◽  
Remote Monitor System ◽  
The Stability ◽  
And Control

Introduced a Web-based real-time network monitoring and control system design methods, the 3-D VR was applied in a remote monitor system based on browser/server structure, and a VRML and Java based 3-D remote monitor system was realized. Meanwhile, give possible solutions of the real-time data transmission and the stability of the system.

Finite Element-Based Control of a Single-Link Flexible Hydraulic Manipulator

2017 ◽  
Author(s):  
Petri Mäkinen ◽  
Jouni Mattila
Keyword(s):  
Finite Element ◽  
Controller Design ◽  
Hydraulic Cylinder ◽  
Flexible Manipulator ◽  
Flexible Link ◽  
Hydraulic Actuator ◽  
Single Link ◽  
Dynamics And Control ◽  
The Stability ◽  
And Control

In this study, a stability-guaranteed, nonlinear, finite element-based control is presented for a single-link flexible manipulator with hydraulic actuation, subject to experimental validation. The strong, inherent nonlinearities of the hydraulic cylinder and fluid dynamics, coupled with flexible link dynamics, cause remarkable challenges in controlling the system effectively. In an attempt to cope with these challenges, a controller based on the Virtual Decomposition Control (VDC) approach is introduced. The VDC approach takes advantage of subsystem-dynamics-based control, enabling the handling of the dynamics and control of the hydraulic actuator and the flexible link separately, thus keeping the controller design relatively simple. The rigorous stability theory of the VDC approach guarantees the stability of the entire system. The experiments demonstrate the VDC controller’s performance in end-point control with built-in vibration dampening.

Rig Jacking on Soft Soil Foundations: Improvements in Safety and Speed by Monitoring Leg Loads

1983 ◽  
Vol 105 (2) ◽  
pp. 201-204
Author(s):  
P. F. Ansquer ◽  
S. A. Antalovsky
Keyword(s):  
Continuous Monitoring ◽  
Soft Soil ◽  
Soil Conditions ◽  
Soil Reaction ◽  
Monitoring And Control ◽  
Reaction Forces ◽  
Structural Stresses ◽  
The Stability ◽  
And Control ◽  
Jack Up

The stability of jack-up rigs with spud-cans, particularly during the jacking-up and preloading operations, has always been critical in soft soil conditions. In the offshore areas opened to prospection in Cameroon, unconsolidated clays and silts are frequent, and therefore the need to conduct these critical operations with maximum safety is of utmost importance. The monitoring of soil reactions at the spud-cans and of structural loads at the jack-houses enabled jacking operations to be conducted safely, in an area where other rigs previously encountered severe difficulties (capsizing). Data recorded by instrumentation have shown that leg maneuvering with soil penetrations of up 40 m (131 ft) may induce dangerous overloads to the structure. The continuous monitoring and control of soil reaction forces and structural loads during drilling ensured the safety of the rig. For jacking-down, the monitoring of the loads was necesary to control the structural stresses induced by the legs pulling out. To the authors’ knowledge, no similar measurements have been reported in the past.

scholarly journals Analysis of Construction Monitoring and Control of Tunnels Crossing Broken Faults and Water-rich Geology

2022 ◽  
Vol 2152 (1) ◽  
pp. 012019
Author(s):  
Jingang Fang
Keyword(s):  
Surrounding Rock ◽  
Monitoring Data ◽  
Monitoring And Control ◽  
Tunnel Engineering ◽  
Construction Monitoring ◽  
Construction Methods ◽  
The Poor ◽  
Secondary Lining ◽  
The Stability ◽  
And Control

Abstract In view of the poor geology such as tunnel engineering crossing faults or passing faults, the construction of surrounding rock and support is complicated. During construction, it is necessary to ensure the stability of the surrounding rock and supporting system, and ensure the timing of the secondary lining construction. For this reason, through the analysis and processing of monitoring data, the law of stratum change is mastered, and the supporting parameters and construction methods are adjusted and revised at the same time, so as to provide the best information for the tunnel surrounding rock and supporting lining construction.

scholarly journals Experimental Investigation on the Operational Stability of Multistage Centrifugal Compression Systems

1999 ◽  
Author(s):  
Chaoqun Nie ◽  
Jingyi Chen ◽  
Haokang Jiang
Keyword(s):  
Dynamic Pressure ◽  
Stability Boundary ◽  
Maximum Amplitude ◽  
Pressure Oscillation ◽  
Operational Stability ◽  
Air Separation ◽  
Monitoring And Control ◽  
Pressure Transducers ◽  
The Stability ◽  
And Control

The operational stability of three multistage centrifugal compression systems was studied experimentally. Two of the tested machines are four-stage centrifugal compressors arranged in two cylinders and used for air separation. The third machine is a ten-stage compressor in two cylinders and used for oxygen production. The measurement features conventional probes for describing performances and per-stage pressure transducers for recording dynamic characteristics. The performance measurement was conducted for the entire machine and also per stages. The signal of dynamic pressures was analyzed in both time and frequency domains. The result of per-stage performances clearly indicated which stage is first to lose the operational stability and how far it happens before the whole system runs into the stability boundary. This result is further demonstrated by the commencing time and location of stages of the strengthened dynamic pressure oscillation which differs from the most dangerous location in terms of maximum amplitude of the pressure oscillation during surge. The knowledge thus obtained for the operational stability should serve a good basis for monitoring and control purposes when running the machine in multistage compression environment.

Computers for data, control and simulation

1988 ◽  
Vol 46 ◽  
pp. 920-921
Author(s):  
David C. Joy
Keyword(s):  
Personal Computers ◽  
Monitoring And Control ◽  
Data Logging ◽  
Data Logger ◽  
Operational Conditions ◽  
Data Control ◽  
The Many ◽  
And Control

Personal computers (PCs) are a powerful resource in the EM Laboratory, both as a means of automating the monitoring and control of microscopes, and as a tool for quantifying the interpretation of data. Not only is a PC more versatile than a piece of dedicated data logging equipment, but it is also substantially cheaper. In this tutorial the practical principles of using a PC for these types of activities will be discussed.The PC can form the basis of a system to measure, display, record and store the many parameters which characterize the operational conditions of the EM. In this mode it is operating as a data logger. The necessary first step is to find a suitable source from which to measure each of the items of interest. It is usually possible to do this without having to make permanent corrections or modifications to the EM.

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