Synchronizing process variables in time for industrial process monitoring and control

Industrialization has led to a huge demand for a network control system to monitor and control multi-loop processes with high effectiveness. Due to these advancements, new industrial wireless sensor network (IWSN) standards such as ZigBee, WirelessHART, ISA 100.11a wireless, and Wireless network for Industrial Automation-Process Automation (WIA-PA) have begun to emerge based on their wired conventional structure with additional developments. This advancement improved flexibility, scalability, needed fewer cables, reduced the network installation and commissioning time, increased productivity, and reduced maintenance costs compared to wired networks. On the other hand, using IWSNs for process control comes with the critical challenge of handling stochastic network delays, packet drop, and external noises which are capable of degrading the controller performance. Thus, this paper presents a detailed study focusing only on the adoption of WirelessHART in simulations and real-time applications for industrial process monitoring and control with its crucial challenges and design requirements.

Download Full-text

Process monitoring and control for laser-based thin film treatment

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5062444 ◽

2012 ◽

Author(s):

Christian Vedder ◽

Jochen Stollenwerk ◽

Konrad Wissenbach

Keyword(s):

Thin Film ◽

Process Monitoring ◽

Monitoring And Control ◽

Film Treatment ◽

Process Monitoring And Control ◽

And Control

Download Full-text

Fractal Pattern Recognition of Image Profiles for Manufacturing Process Monitoring and Control

Volume 3: Manufacturing Equipment and Systems ◽

10.1115/msec2018-6523 ◽

2018 ◽

Cited By ~ 4

Author(s):

Farhad Imani ◽

Bing Yao ◽

Ruimin Chen ◽

Prahalada Rao ◽

Hui Yang

Keyword(s):

Additive Manufacturing ◽

Process Monitoring ◽

Manufacturing Process ◽

Manufacturing Systems ◽

Experimental Studies ◽

Precision Machining ◽

Monitoring And Control ◽

Process Monitoring And Control ◽

Ultra Precision ◽

And Control

Nowadays manufacturing industry faces increasing demands to customize products according to personal needs. This trend leads to a proliferation of complex product designs. To cope with this complexity, manufacturing systems are equipped with advanced sensing capabilities. However, traditional statistical process control methods are not concerned with the stream of in-process imaging data. Also, very little has been done to investigate nonlinearity, irregularity, and inhomogeneity in image stream collected from manufacturing processes. This paper presents the multifractal spectrum and lacunarity measures to characterize irregular and inhomogeneous patterns of image profiles, as well as detect the hidden dynamics of the underlying manufacturing process. Experimental studies show that the proposed method not only effectively characterizes the surface finishes for quality control of ultra-precision machining but also provides an effective model to link process parameters with fractal characteristics of in-process images acquired from additive manufacturing. This, in turn, will allow a swift response to processes changes and consequently reduce the number of defective products. The proposed fractal method has strong potentials to be applied for process monitoring and control in a variety of domains such as ultra-precision machining, additive manufacturing, and biomanufacturing.

Download Full-text