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The problem of observer design is addressed for a class of triangular nonlinear systems in presence of output measurement sampling and time-delay. A major difficulty with the considered nonlinear systems is that the state matrix is dependent on the “undelayed output signal” which is not accessible to measurement, making existing observers inapplicable. A new observer is designed where the effects...
In practice often multiple control applications share a communication channel, requiring a smart and scalable scheduling mechanism to coordinate the access to the capacity-limited communication medium. In this paper, we propose a decentralized event-triggered medium access control (MAC) for multiple feedback control loops which are coupled through a capacity-limited communication medium. The individual...
The following paper discusses the design and implementation of a 3D gesture-based control system that can substitute any complex human-machine interface with a simpler and more familiar one. This system that can be used by any user disregarding his/her background (age, education, health, language etc.…), making it dependent on nothing more than the movements of the user’s hands, thus allowing them...
Autonomous systems able to react and change their behaviour in response to events during operation. These established abilities are based on the preprogrammed action or actions to be taken when encounter certain states in the deployed environment. Therefore prior to deployment, a knowledge expert with comprehensive understanding of the physical system and the deployed environment must specify anticipated...
During the spinning forming process of chitosan and collagen absorbable suture, the diameter is uneven. To solve this problem, this article provides a diameter control system of absorbable suture which based on generalized predictive control (GPC) algorithm. The system consists of the diameter detection module based on linear CCD, the control module based on STM32, the actuator of reverse series type...
CNC lathe is popular automatic machine tools, which basically requires Programmable Logic Controller (PLC) for the mechanical motion of the machine. This paper discuss the initial implementation of PLC-CNC in controlling the AC induction motor as rotation servo of the lathe turret. The implementation was mainly tested on CNC lathe machine with 4 different conditions that is 270 rpm, 240 rpm, 210 rpm...
Developing embedded control systems for UAVs is a crucial problem that has received a considerable attention in the literature, mainly due to the high stakes related to these vehicles. Given the progress of simulation tools, model-based approaches have became a natural trend to achieve this task. However, one common drawback of such approaches relies in the complex transition from simulation to real...
The article shows the design and implementation of a gesture control system, which determines the gesture from the movement of the hands. The presented gesture controller system can be built relatively easy from cheap components, so it is ideal development goal in case of a students' project also in the field of project based learning. The movement detected with distance measurement sensors, and the...
Severe in-vehicle air quality may affect drivers and passengers' health and reduce customers' satisfaction or experience with the vehicles, especially in some areas with heavy pollutants. Nowadays, in-vehicle cabin air quality management draws more attention from automakers. The advances in climate control include improved filtering systems and advanced climate control management based on air quality...
This paper considers the design and implementation of a discrete-time fast tracking controller for quadrotor vehicles subject to perturbations. The proposed controller consists of a model-based disturbance observer and a Composite Nonlinear Feedback (CNF) controller. The CNF control law introduces nonlinear damping to the system so that it possesses a fast rise time without overshoot. The least square...
This study introduces a distributed virtual laboratory for a multiagent programming course which has been very satisfactorily adopted by students, with a success rate of nearly 80%. It also aims at capturing the daily activity of students, providing the basis for data-driven assessment. Finally, it also allows for using process mining technologies to unveil successful and failed behaviors of students...
Currently, cloud computing offers flexible, dynamic and cost effective computing outsourcing, but it limits these economic and operational benefits to non real-time and non safety-critical systems. This is because of the lack of alternative control, supported by current cloud infrastructures, in case of a broken cloud link. While steps have been taken in using cloud infrastructures for soft real-time...
Nowadays, crucial parts of modern Building Automation and Control Systems (BACS) are active control and monitoring functions. Many of research have been conducted to investigate the support of location-based services (LBS) for individuals in the BACS. Since microlocation technology could be used to enable reliable and precise indoor positioning and navigation, an indoor positioning system (IPS) has...
To optimize the lifetime of switching power semiconductors, this paper presents improvements in the performance and coordination of a control system to regulate power device junction temperature, Tj, and its change during power cycles, ΔTj. This research proposes a ΔTj control law which closes a control loop on the rate of change state, Tj, and subsequently introduces active thermal capacitance and...
In view of the situation that patients are transferred by manual method which makes it waste of manpower and easy to produce secondary damage to the patient, a new patient transfer apparatus is presented, and the mechatronics design and application are described. Using this apparatus, one nurse can transfer patient from bed to stretcher or from stretcher to the bed without changing the attitude of...
An Unknown Input Observer design for the sensors fault diagnosis of a non-linear system is the aim of this paper. To detect the faulty sensor, the method based on output residual is used. To obtain such a residual signal, an observer-based approach is proposed. How to design such observer is explained in details. Moreover, the two-tank system fault-tolerant control method is proposed. An experimental...
The use of Petri nets (PNs) to create control systems has many advantages, because of their formalism, graphical presentation and the possibility of parallel processes control. One of the few fuzzy PNs that was used directly in the control system is the fuzzy interpreted Petri net (FIPN). However, there is a long way from a control algorithm in the form of FIPN to its practical implementation. The...
This paper is a part of work on the attempt to implement the continuous control system which dynamically derives the control law during its operation, on basis of a model-based control algorithm. The measurements obtained from the sensors are dynamically included or excluded depending on the availability of individual sensors. The prototype application was developed in the JADE environment, and its...
As distributed systems such as automotive, medical, manufacturing automation become larger and more complex, it is difficult to test these systems. Also, the synchronization of distributed applications make the testing more difficult. In the Software-in-the-Loop (SiL) simulation, a synchronization method among clock of applications is provided for virtual hardware devices and environment. A typical...
This paper presents a method to check for feature interactions in a system assembled from independently developed concurrent processes as found in many reactive systems. The method combines and refines existing definitions and adds a set of activities. The activities describe how to populate the definitions with models to ensure that all interactions are captured. The method is illustrated on a home...
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