Human machine interfaces (HMI) have become a part of our daily lives. they are an essential part of a variety of products ranging from computers over smart phones to home appliances. Customer9;s requirements for HM...
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ISBN:
(纸本)9789897585227
Human machine interfaces (HMI) have become a part of our daily lives. they are an essential part of a variety of products ranging from computers over smart phones to home appliances. Customer's requirements for HMIs are rising and so does the complexity of the devices. Several years ago, many products had a rather simple HMI such as mere buttons. Nowadays lots of devices have screens that display complex text messages and a variety of objects such as icons. this leads to new challenges in testing, the goal of which it is to ensure quality and to find errors. We combine a genetic algorithm with computer vision techniques in order to solve two testing use cases located in the automated verification of displays. Our method has a low runtime and can be used on low budget equipment such as Raspberry Pi which reduces the operational cost in practice.
In this paper, the design of an exoskeleton for the upper limb is presented, aimed primarily at training and rehabilitation in virtual environments. A mechanical model of the exoskeleton arm as haptic device is built ...
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ISBN:
(纸本)9789897583049
In this paper, the design of an exoskeleton for the upper limb is presented, aimed primarily at training and rehabilitation in virtual environments. A mechanical model of the exoskeleton arm as haptic device is built up and impedance control scheme is selected as the most suitable for force reflection at the arm. the design of a grounded exoskeleton prototype is revealed in the paper. A driving system based on braided pneumatic muscle is selected to ensure natural security in the interaction. Antagonistic drive system for each joint is shown, using pulley and Bowden cable transmissions. An approach is presented for the joint moments control by antagonistic interaction of bundles with different numbers of pneumatic muscles. control scheme of joint torque by antagonistic interaction is given, too. Computer simulations are performed to provide power reflection by virtual reality (VR), according to scenario of virtual gymnastics.
this paper proposes a novel way of constructing strut-type modular robotic structures to avoid some difficulties of designing and implementing ideal compliant nodes. Rigid nodes are employed to replace the ideal compl...
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ISBN:
(纸本)9789897581984
this paper proposes a novel way of constructing strut-type modular robotic structures to avoid some difficulties of designing and implementing ideal compliant nodes. Rigid nodes are employed to replace the ideal compliant nodes and to reduce the structural complexity while the feasibility of hardware implementation is dramatically improved. To release some kinematic constraints caused by the rigid nodes, we introduce robotic struts that consist of two prismatic actuators linked by a passive revolute joint. Physics-based robot models are constructed using a robot simulator. A scalable distributed control method is implemented using coupled central pattern generators. And, for comparison, the same control method is applied to conventional and the proposed strut-type modular robotic structures. Simulation results show that the proposed strut-type structures have several advantages over the conventional ones including less number of passive joints and shape-maintenance property.
the paper introduces the multi-robot area coverage problem, wherein a group of robots must inspect every point of a 2-dimensional test environment and surround all contaminations (or enemies) found. Self-organizing ro...
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ISBN:
(纸本)9789897580406
the paper introduces the multi-robot area coverage problem, wherein a group of robots must inspect every point of a 2-dimensional test environment and surround all contaminations (or enemies) found. Self-organizing robotic systems are able to accomplish complex tasks in a changing environment, using local interactions among individual agents and local environment without an external global control. Our interest in this area is motivated by an involvement in a project with a goal to solve tasks of difficult area coverage and surveillance by a large team of small autonomous robots. In the paper, the architecture to achieve this is described, and simulation results are presented to compare efficiency of coverage of the area and surround of found targets using robots groups having different sensors ranges.
In this paper we propose the use of a redundant array of structured light scanning cameras to monitor a collaborative robot workspace. We present the model and suggest a minimum number of such cameras required to moni...
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ISBN:
(纸本)9789897580406
In this paper we propose the use of a redundant array of structured light scanning cameras to monitor a collaborative robot workspace. We present the model and suggest a minimum number of such cameras required to monitor a particular area. We then propose a concept for segmenting the workspace into different sub volumes to allow for different categories of obstacles. We then propose that a voting scheme will allow us to process multiple camera inputs in real-time in a safe fashion. We perform initial experiments and draw appropriate conclusions before defining further work.
We consider the problem of time-sampling optimization for a Statistical Process control. the aim of this optimization is to minimize the expected loss, caused by a delay in the detection of an undesirable process chan...
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ISBN:
(纸本)9783030319939;9783030319922
We consider the problem of time-sampling optimization for a Statistical Process control. the aim of this optimization is to minimize the expected loss, caused by a delay in the detection of an undesirable process change. We study the case where the criterion of the optimization is a quadratic polynomial of this delay. the optimization problem is modeled by a calculus of variations problem where the functional is minimized by a proper choice of the time-sampling interval. this functional also depends on a numerical parameter, characterising a magnitude of the process change. the problem is solved in two cases of the information on this parameter: (i) the value of the parameter is known;(ii) the value of the parameter is unknown, while we know the interval where this parameter varies. Examples and numerical simulation, illustrating the theoretical results, are presented.
this work presents the optimisation of the heading controller of a small flying robot. A genetic algorithm (GA) has been used to tune the proportional, integral, and derivative (PID) parameters of the helicopter9;s...
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ISBN:
(纸本)9789898111319
this work presents the optimisation of the heading controller of a small flying robot. A genetic algorithm (GA) has been used to tune the proportional, integral, and derivative (PID) parameters of the helicopter's controller. Instead of evaluating each individual's fitness in an artificial simulation, the actual flying robot has been used. the perfonnance of a hand-tuned PID controller is compared to the GA-tuned controller. Tests on the helicopter confirm that the GA's solutions result in a better controller performance. Further more, results suggest that evaluating the GA's individuals on the real flying robot increases the controller's robustness.
LiDAR sensors are unable to detect objects that are inside or behind dense smoke, fog or dust. these aerosols lead to problems for environmental modeling with mobile robotic platforms. For example, if a robot equipped...
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ISBN:
(纸本)9789897581984
LiDAR sensors are unable to detect objects that are inside or behind dense smoke, fog or dust. these aerosols lead to problems for environmental modeling with mobile robotic platforms. For example, if a robot equipped with a LiDAR is surrounded by dense smoke, it can neither localize itself nor can it create a map. Radar sensors, on the other hand, are immune to these conditions, but are unable to represent the structure of an environment in the same quality as a LiDAR due to limited range and angular resolution. In this paper, we introduce the mechanically pivoting radar (MPR), which is a 2D high bandwidth radar scanner. We present first results for robotic mapping and a fusion strategy in order to reduce the negative influence of the aforementioned harsh conditions on LiDAR scans. In addition to the metric representation of an environment with low visibility, we introduce the LRR (LiDAR-Radar-Ratio), which correlates withthe amount of aerosols around the robot discussing its meaning and possible application.
the paper studies the problem of determining the optimal control when singular arcs are present in the solution. In the general classical approach, the expressions obtained depend on the state and the costate variable...
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ISBN:
(纸本)9783030319939;9783030319922
the paper studies the problem of determining the optimal control when singular arcs are present in the solution. In the general classical approach, the expressions obtained depend on the state and the costate variables at the same time, so requiring a forward-backward integration for the computation of the control. In this paper, firstly sufficient conditions on the dynamics structure are discussed, in order to have boththe control and the switching function depending on the state only, computable by a simple forward integration. then, the possibility to extend this result by means of a preliminary dynamic extension is presented. the approach has been checked and validated making use of a classical SIR epidemic model.
In this paper we describe a Wireless Body Area Network (WBAN) designed and implemented for an autonomous robot. We concentrate in particular on the ultra-low power radio aspects. We compare and contrast standard and p...
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ISBN:
(纸本)9789897581984
In this paper we describe a Wireless Body Area Network (WBAN) designed and implemented for an autonomous robot. We concentrate in particular on the ultra-low power radio aspects. We compare and contrast standard and proprietary solutions before deciding on a proprietary radio SoC in the 2.4 GHz. band. We describe the protocol implementation and tests on both a test jig and on the robot itself at sampling rates of up to 1 kHz. and conclude that the principle of a robot based WBAN works well. We also show that the proposed WBAN is suitable for connection by nodes employing energy harvesting.
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