Control System Technology Research Articles

Next-generation innovation and development of intelligent transportation system in China

As an integrated application of advanced technologies such as information technology, system control technology, and artificial intelligence in the transportation field, the intelligent transportation system (ITS) has been regarded as an efficient and effective solution for alleviating transportation issues that are encountered in several countries around the world. In this paper, the development history of the ITS in China is presented, and the problems and challenges faced by the ITS in China in the new normal state are clearly laid out. Three new ITS development requirements in China are then identified, and six development trends and directions are proposed. Through the successful application of the above guidelines, next generation innovation and development of ITS is expected to be realized in China, promoting and supporting the trends of urbanization, motorization, and informationization, which are resulting in fundamental changes in the development of the Chinese society and economy.

Industrial alarm systems: Challenges and opportunities

Industrial alarm systems are very critical for the efficient and safe operation and control of plants. Alarms are used to inform the operator about possible process deviations from the normal so that the operator can take appropriate corrective action. Alarm activation and the corresponding response from the operator together serve as one of the critical layers of protection during the occurrence of a process fault. With the rapid advancement in control systems technology over the past few decades, the number of process sensors deployed for a particular plant has dramatically increased. In addition, due to the ease in configuring the alarms in control systems, the number of alarms in a plant has also gone up. This has led to poor system performance, increase in the operator workload due to alarm overload, and catastrophic incidents in some cases. This review paper discusses such issues, provides details about the existing regulations, standards and guidelines, and challenges related to alarm management. In addition, it summarizes some of the open research problems in the area of effective alarm management.

A low-cost and flexible solution for one-shot cooperative robotic drilling of aeronautic stack materials

In this paper, a general architecture for robotized cooperative drilling of hybrid metal/Carbon Fibre Reinforced Polymer (CFRP) aeronautic stacks is presented. The main objectives are to reduce non-added value operations as dismantling, deburring, cleaning and to improve hole quality by reducing the occurrence of delamination and inter-laminar cracking. The approach to achieve such targets is the adoption of a one-shot drilling automatized system based on low cost cooperative robots. The proposed technology consists in a general robot architecture and a cooperative drilling process using only standard low-cost robots and off-the shelf components. A first robot is in charge of drilling the hybrid stack, while a second manipulator ensures the right clamping force between the parts of the stack. Both robots are equipped with force control capabilities to control the generalized forces raising during the interaction with the stack. In this perspective, thanks to the adoption of a fuzzy inference system, the tuning of the force controllers might be carried out by operators that have knowledge of the drilling process but not of control system technology. Such feature makes the solution appealing for industrial production environments. The approach is experimentally validated on a cell with two Comau SmartSix robots drilling an aluminium-carbon fibre stack.

Attacks on industry

Although the majority of industrial organisations believe they are well-prepared for cyber-security incidents, around half of firms using industrial control system (ICS) technology experienced between one and five incidents last year, according to research by Kaspersky Lab, and 4% experienced more than six. Meanwhile, a major new threat has emerged.

2016 IEEE Transactions on Control Systems Technology Outstanding Paper Award

2016 IEEE Transactions on Control Systems Technology Outstanding Paper Award

Vision algorithms for fixed-wing unmanned aerial vehicle landing system

Autonomous landing has become a core technology of unmanned aerial vehicle (UAV) guidance, navigation and control system in recent years. As a novel autonomous landing approach, computer vision has been studied and applied in rotary-wing UAV landing successfully. This paper aims to fixed-wing UAV and focus on two problems: how to find runway only depending on airborne front-looking camera and how to align UAV with the designated landing runway. The paper can be divided into two parts to solve above two problems respectively. In the first part, the paper firstly presents an algorithm of region of interest (ROI) detection, which is based on spectral residual saliency map, and then an algorithm of feature vector extraction based on sparse coding and spatial pyramid matching (SPM) is proposed, finally, ROI including designated landing runway is recognized by a linear support vector machine. In the second part, the paper presents an approach of relative position and pose estimation between UAV and landing runway. Estimation algorithm firstly selects five feature points on the runway surface, and then establishes a new earth-fixed reference frame, finally uses orthogonal iteration to estimate landing parameters including three parameters of distance, height and offset, and three pose parameters of roll, yaw, pitch. The experimental results verify the effectiveness of the algorithms proposed in this paper.

QCSの変革と未来

これまで製紙業界の繁栄と共にQCSの歴史も重ねられてきた。

Design and implementation of the communication system based on wireless communication for open-pit mine

Aiming at the problems of underdeveloped information technology and low penetration rate of wireless communication technology and automatic control system in open-pit mines, this paper studied the communication technology and protocol for the vehicle communication of open-pit mines. Based on the wireless GPRS/4G cellular network, the study established the basic network framework of the system, and designed the key communication technologies and suitable wireless communication protocol, including network hierarchical model, network protocol, message transmission rules, and message structure. The vehicle management and monitoring information system was developed based on the component-based development technology. Thus, the general communication mode and packet flow transaction were established. The application shows that the designed system can meet the requirements of vehicle data transmission. Vehicles on the road can be monitored, scheduled, and managed much more efficiently than ever before.

A Review on In-situ Monitoring and Adaptive Control Technology for Laser Cladding Remanufacturing

The repair technology of metal parts is one of the important parts in remanufacturing industry, which has been recognized as playing a key role in improving manufacturing sustainability. As an effective repair technology, laser cladding remanufacturing (LCR) has been researched actively for several decades. In the meantime, the quality and repeatability of the cladding layers are still the key issues in LCR technology. This is particularly true in the remanufacturing of high-end and high-value equipment such as aircraft engines and large-scale compressors. With the development of the sensing and control system, in-situ monitoring and adaptive control (IMAC) technology has recently been received increasing attention to enhance parts quality and repeatability as a high priority research goal. This work intends to review the significant signals that can be in-situ gathered and have been published in the literatures for IMAC such as visual signal, temperature signal, acoustical signal and spectrum signal. The in-situ control methods are also discussed in the paper.

電動車両用パワープラント制御システム技術の研究

電動車両用パワープラント制御システム技術の研究

Biostimulation: Innovative Tool to Improve Reproductive Efficiency in Farm Animals

Chemical communication plays an important role in mammalian behaviour and reproductive processes. Pheromones is one means of transmiting such information. Pheromones are air-borne chemical substances (“signals”) released in the urine or feces of animals or secreted from cutaneous glands that are perceived by the olfactory system and that elicit both behavioural and endocrine responses in conspecifics. In mammals, signalling and priming pheromones are thought to act either singly or in combination through olfaction, auditory, visual (sight) or tactile stimuli. Extensive studies in livestock have established the importance of pheromones in influencing the reproductive performance both in males and females. Pheromones and other allelomimetic cues can exert profound effects on reproductive activity via the hypothalamic system that generates pulses of gonadotropin-releasing hormone. Manipulations of these factors and other pathways linking environmental inputs to reproductive output can lead to developing the concept of “control systems technologies”, aimed at controlling reproductive performance. The knowledge acquired on the effectiveness of biostimulation; the factor which conditions it and the biological mechanism which produces it in livestock species, allows its use as a breeding management tool. The understanding of the role of pheromones could be of potential economic importance in addressing some of the problems associated with livestock production in the tropics. The biostimulation technique offers a potentially useful and practical way to improve reproductive efficiency in livestock species in the tropics. The exact nature of the cues and the role of biostimulation in livestock species especially swine, sheep, goats and cattle in developing countries require more attention.

Impact of effective internal control system and information technology on the quality of accounting information system of enterprises in Ho Chi Minh city

This study was conducted to examine impact of effective internal control system and information technology on the quality of accounting information system. Data are collected from a survey on 192 accountants, managers, and employees who operate and manage information systems in HCMC in 2014. The author used Cronbach’s Alpha coefficients, EFA methods to assess the reliability, value of scale, and linear regression analysis to test hypotheses. The results of the study show that the quality of an accounting information system is influenced by the effectiveness of internal control system as well as the application level of IT in accounting. These results are expected to offer managers a basis for establishing a quality accounting information system that provide users with quality accounting information.

Study on Microstructure and Properties of 20MnMoNb Steel by Gas Oxynitriding

The 20MnMoNb steels were gas-oxynitrided for 2 h at 610 °C in a controlled atmosphere by the self-making process control system and gas oxynitriding technology. The microstructure, hardness, wear and corrosion resistance of the 20MnMoNb steels by gas oxynitriding were studied by OM, XRD, hardness test, wear test and neutral salt spray test. The results show that the thickness of diffuse layer is about 0.25 mm and that of the compound layer formed on the surface is about 50 μm. The compound layer is made of bulky columnar crystals, which have different morphology in the different form positions. The compound layer surface of gas-oxynitrided specimens consists of e-Fe3N, magnetite—Fe3O4 and inner surface consists of e-Fe3N and Fe4N. The different oxygen and nitrogen concentrations lead to different morphologies in the different positions of bulky column crystals. The compound layer has a good hardness distribution and high wear and corrosion resistance.

OFF-GRID TINY HOUSE SMART RESIDENTIAL ENERGY MANAGEMENT SYSTEM

INTRODUCTION Students at California State University (CSU), Chico designed, built, and tested an off-grid solar powered tiny house and competed in the 2016 Sacramento Municipal Utility District's (SMUD) Tiny House Competition. Top tier research institutions, predominantly undergraduate universities, and community colleges from all over California competed against one another in a variety of performance and aesthetic events in SMUD's first ever competition. One of the main goals of the CSU, Chico's Tiny House was to design and implement an autonomous energy management system to maximize energy capture, use, and efficiency and provide a seamless, comfortable, and uninterrupted indoor living environment. This system, smart residential energy management system (SREMS), was designed to monitor and sense solar energy collected and stored, indoor heating and cooling loads, occupant cooking and personal water heating needs, and electrical outlets and to determine and allow energy related activities given the amount of stored energy. Thermodynamic and heat transfer models were developed to predict heating, cooling, and appliance requirements. These models were used to size the solar array, battery storage, and appliances. SREMS was installed in the tiny house and its performance was tested and validated during the week long SMUD Tiny House competition. Results showed close correlation with the predicted energy requirements of the models, and the tiny house maintained net-zero energy use even during overcast and rainy skies throughout the three-day event. The CSU, Chico team won best control system and best technology at the statewide event. This paper describes the design, installation and testing results of CSU, Chico's Tiny House SREMS.

Hysteresis behavior of seismic isolators in earthquakes near a fault in eccentrically braced frames with vertical and horizontal links

Seismic performance and appropriate design of structures located near the faults has always been a major concern of design engineers. Because during an earthquake; the effects of plasticity will make differences in characteristics of near field records. These pulsed movements at the beginning of records will increase the maximum acceleration, speed and displacement which create unconventional forms in the response spectrum and apply a lot of energy to the structure. Appropriate lateral loading systems were proposed to eliminate the hardness and ductility at the same time and provide more acceptable systems in this field. One of these systems is the eccentrically braced frames systems in which seismic performance is based on link beam. However, any pulsed movements in the near field records in this system will be followed by unusual behavior. This type of behavior has been controlled by advancement of technology and creation of vibration control systems because the earthquake forces are indirectly applied to the structure. For further investigations about this issue in this study, some traditional twodimensional frame in 4, 8 and 12 floors were modeled using seismic isolators and then by applying nonlinear analysis and near field earthquake records, their hysteresis behaviors were studied. Keywords: hysteresis curve; near-fault records; eccentrically braced frames; link beam

Research on Digital Simulation of mechanical and Control System Based on MATLAB

With the rapid development of power electronic technology, microelectronics technology, modern control theory and material science, AC speed control system and electromechanical integration technology presents a broad development and application prospect. Therefore, it is has become a challenging new topic to set up models, make simulation and analysis for such system.In this paper, it takes the simulation of mechanical control system as the breakthrough point, combined with the brief introduction of Matlab/Simulink simulation software and the general method for simulation of mechanical and control system, discussing the realization of the general simulation model of the mechanical and control system based on MATLAB/Simulink.

Study on dynamic characteristic of wind turbine emulator based on PMSM

In this paper, a wind turbine emulator (WTE) based on the load torque dynamic compensation of PMSM is proposed to satisfy the further study of wind power system control technology in laboratory. The basic characteristic of wind turbine is analyzed to compare the wind turbine with its WTE. The dynamic compensation method based on the acceleration feedback is improved to propose the load torque dynamic compensation method to realize the dynamic characteristic simulation of wind turbine. Moreover, a low pass filter (LPF) is adopted at the load torque compensation module to suppress the torque ripple of the wind generator. An entire wind power system experimental platform is built to test the proposed torque compensation method. The results verify the proposed control method.

Formation and control system by the specialized data in information networks

The paper considers the problem of collection, processing and control by the highly specialized information. The system offers the correct solutions for a multilingual representation of information in the Internet. It is proposed to use the implementation technology of the information control systems based on multi-agent approach.

2015 IEEE Transactions on Control Systems Technology Outstanding Paper Award

2015 IEEE Transactions on Control Systems Technology Outstanding Paper Award

Development of Remote Control System for Residential AC Power Supply Based on GSM Technology

The present study deals with the development of remote control system based on the Global System for Mobile Communication (GSM) technology for switching the low voltage AC power supply system at residential consumer. Function of this system is to disconnect and reconnect the electricity supply to consumers. The introduction of the GSM technology and particularly the use of hand-held mobile phones has brought the innovative distance communication to remote locations. This utilization of this technology for the remote control of systems and appliances will make life easier, safe and quick from anywhere. GSM module was used for receiving short message service (SMS) from user’s mobile phone that automatically enable the controller to take any further action such as to switch on and off the consumer load at the incoming power supply. The system was integrated with microcontroller and GSM network interface using assembly language. AVR Studio 4 software was utilized to accomplish the integration. The system is activated when user sends the SMS to GSM controller circuit at electric meter consumption panel board. Upon receiving the SMS command, the microcontroller unit then automatically controls the incoming power supply by switching on or off the device according to the user command. In other words, the developed system reads message from the mobile phone and responds to control the devices according to the received message. The system can also give feedback to the user to inform the status of switching operation if such command is received.