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Technological advances in wireless sensors shed some light on the deployment of Industrial Wireless Sensor and Actuator Networks (IWSAN) for diverse applications in process automation due to their multiple advantages related to the reduction in wiring costs, implementation and maintenance. However, the most critical processes, like closed loop control applications which have shorter than 1 ms time...
The next industrial revolution, generally referred to as Industry 4.0, is already here. This envisions a rapid transformation in the design, operation and service of manufacturing systems, where machines, sensors and actuators are interconnected in the factories in order to enable spontaneous collaboration, monitoring and control. Currently, Cyber-Physical-Systems (CPS) use regular Internet protocols...
In this paper, a method of interaction with Wireless Sensors Networks (WSN) through cloud, called Wireless Sensor Network over Cloud (WSN-C), is proposed. The physical sensors are not considered stand-alone sensors but they can be monitored, controlled and updated (programmed) via cloud services. The Cloud can communicate with the sensors through the WSN access point, or Sensor Gateway. Thus, every...
The micro-operation technology is developing rapidly since the miniaturization of the research object and the precision of the operation. As the actuator of micro-operation, the piezoelectric material with the inverse piezoelectric effect has been widely used in this field. A new type of actuator based on piezoelectric single crystals is characterized in this paper, and a set of test system is designed...
This paper proposes an event-triggered control algorithm that uses self-triggered sampled data for continuous-time uncertain linear systems. In the proposed approach, the controller computes not only the actuator signal, but also two kinds of time instants online; the time of sampling and the time of the actuator signal updates. In particular, the next time of sampling is determined so as to maximize...
In this paper, a disturbance observer (DOB) approach is developed to reject disturbance and achieve precision position control of a quadcopter. The Q-filter is tuned to deal with both drift and noise from the onboard sensors. The position estimates are obtained from a hybrid low-pass and de-trending (HLPD) filter. Simulation and experimental flight tests are conducted to demonstrate the performance...
In this paper we present an integrated approach to control and sensing design. The framework assumes sensor noise as a design variable along with the controller and determines l1 regularized optimal sensing precision that satisfies a given closed loop performance in the presence of model uncertainty. We pursue two approaches here. In the first approach, we represent the uncertainty as polytopic and,...
We introduce the system level approach to controller synthesis, which is composed of three elements: System Level Parameterizations (SLPs), System Level Constraints (SLCs) and System Level Synthesis (SLS) problems. SLPs provide a novel parameterization of all internally stabilizing controllers and the system responses that they achieve. These can be combined with SLCs to provide parameterizations...
In this work, a data-driven fault diagnosis and estimation scheme is proposed and developed specifically for aircraft gas turbine engine actuator and sensors. The proposed fault detection, isolation and estimations filters are directly constructed by using only the system I/O data at each operating point of the engine. The associated system Markov parameters are estimated by using the frequency response...
The proposed research is devoted to the problem of information models creation for intelligent control of wells drilling process through the relevant sensors derived parameters identification and feedback generation by the changes of the drilling environment through the modification of controlled variables for relevant process actuators under the imposed constraints.
This paper presents the design and implementation techniques for an embedded device and computer cooperative system. The system is mainly designed for realtime industrial measurement, analysis, and control applications. The embedded device, the microcontroller, can stream realtime data to the computer up to 11520 bytes per second. In the embedded device side, four channels of ADCs and PWMs are implemented...
Distributed control applications cover a wide range of areas such as automotive, avionics, and automation. The Logical Execution Time (LET) Model of Computation (MoC) was proposed as a formal method to describe the functional and timing behavior of such applications. However, modern Multi-Processor Systems on Chip (MPSOC) do not have a shared notion of time between processors, due to their use of...
The more the technology advances into the future, the more it makes the life of people depending on it easier and one of such technologies is Automation. The term Automation can be coupled with-no effort, ease of performing a task and less human involvement. Internet of Things is such other term which envisions every object around us as an integral part of the Internet. In this paper, we suggest a...
We all are very much aware of IoT that is Internet of Things which is emerging technology in today's world. The new and advanced field of technology and inventions make use of IoT for better facility. The Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers and the ability to transfer...
This paper proposes a design method of a support tool for detection and diagnosis of failures in discrete event systems (DES). The design of this diagnoser goes through three phases: an identification phase and finding paths and temporal parameters of the model describing the two modes of normal and faulty operation, a detection phase provided by the comparison and monitoring time operation and a...
Noise and vibration causes many problems in most of the industrial applications and they have grown in recent years. Active methods of controlling vibration has been of great interest for applications requiring low weight, lower energy consumption, ease of handling, safer operation due to reduced inertia, and high speed applications. Active control involves the use of sensors to sense the vibratory...
A single-chip Atomic Force Microscope (sc-AFM) has been developed that integrates X, Y, and Z scanners, sensors, and a sharp tip onto a single 1×1 mm CMOS-MEMS device to replace a conventional AFM. This solution leverages physical scaling laws to offer numerous benefits over conventional instruments, including reduced size (1,000x), reduced cost (100x), superior vibration immunity, and improved versatility...
This study presents a practical method to perform mechanical characterization of cells using Silicon Nano Tweezers (SNT). Integrated with a microfluidic device, SNT tips were inserted in a channel via a side opening. Cells to be characterized were injected to an inlet of the microfluidic channel and withdrawn by a vacuum pump connected to an outlet. Mechanical properties of a cell, e.g. diameter,...
This paper reports the first single-chip atomic force microscope (sc-AFM) array that simultaneously acquires multiple images of a sample. The design, fabrication in a CMOS-MEMS process, and characterization of a 4×1 array is presented in this paper. Four AFM cantilevers share an electrothermal (ET) lateral stage while each AFM cantilever is independently driven, sensed, and controlled. The reported...
A passively self-aligned, assembly-based process for rapidly creating compact, micro-barrel hinges with unconstrained rotation from SU-8 epoxy is presented. The alignment process takes places in two stages: a coarse alignment stage guided by external dowel pins followed by a fine alignment stage driven by the hinges' features themselves. The assembly of pins into housings circumvents the design rules...
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