The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An alternate stepping piezoelectric linear motor was proposed. The operation principle of this novel linear motor was analyzed. A prototype was fabricated and its mechanical properties was tested which proves that the principle is feasible. When the motor is driven by three-phase square and triangular waves and four-phase sine waves at a voltage of 100V(peak to peak value), and frequency of 100Hz,...
This paper introduces a new type of linear actuator using the electromagnetic attractive force, which enables a submillimeter stroke. In general, actuation by the electromagnetic attractive force causes a tradeoff problem between the thrust force and the stroke because the thrust force depends on the gap between the electromagnet and the armature; an increase in the gap (stroke) drastically degrades...
In this paper, we introduce the latest prototype MoMo for the R+iSpace. The R+iSpace denotes ‘Reconfigurable Intelligent Space’, and it can solve the problem of device's spatial constraint that the conventional iSpace has. The R+iSpace employs the mobile module (MoMo) to solve the problem. The MoMo is a kind of wall climbing robot, and the device is mounted on the MoMo. Thus, the R+iSpace can solve...
Morbus Parkinson is a widespread disease amongst the elderly people. With increasing life expectancy the numbers of patients with Parkinsons disease are rising. Over the last decade, Deep Brain Stimulation (DBS) of certain nuclei within the basal ganglia has been established as an effective treatment for patients with advanced Parkinsons disease (PD) and motor complications not longer adaequatly treated...
In bio-inspired robotic applications, multiple-degree-of-freedom actuators are often desired. The current state of the art of variable stiffness actuators consist mostly of different concepts for single-degree-of-freedom joints. An innovative Mechanically Adjustable Compliance and Controllable Equilibrium Position Actuator (MACCEPA) concept is presented to specifically accommodate implementation in...
Piezo-actuated micro/nano manipulators have been extensively investigated in the past decades. A large number of prototypes and products were developed to perform micro/nano operations. In general, once built, the characteristics of a micro/nano manipulator are fixed and not changeable. Therefore, one manipulator is particularly well-suited to certain special tasks. A new modularized design methodology...
In recent years, biological micromanipulations emerge as a promising application in the micro/nano technology. Manual manipulation tends to have disadvantages of low success rate and low repeatability. In order to perform the robotic biomanipulations, a novel flexure-based Yθ large-workspace micromanipulator with differential lever displacement amplifier (DLDA) is proposed in this paper. After a series...
A novel design concept is presented for amplifying the displacement of a PZT stack over 50-fold while transmitting a significant amount of work per cycle. Piezoelectric devices, such as PZT stack actuators, have a competitive power density, while consuming virtually no energy for generating a force at a constant position. Despite the salient features, the actual work usable for activating a load is...
In recent years, piezo-actuated micro/nano positioning stages emerge as a significant tool in the nanotechnology. However, the shortcomings of small positioning stroke and hysteresis of piezoelectric actuators have constrained their further development and applications. In this paper, a novel piezo-actuated hydraulic displacement amplifier (PHDA) based on Pascal's law and area differential principle...
This paper presented a click mechanism, which is inspired by a Dipteran insect, for use in flapping-wing micro aerial vehicle. The clicking mechanism is integrated in a thorax-like compliant mechanism, which buckles and consequently produces a large wing stroke when driven by an electric motor. The thorax-like compliant mechanism can store elastic energy in flexible hinges and is good for storing...
A virtual prototype model of wall finishing robot is developed and the force situation in the working process has been analyzed. Applying SolidWorks and its CAE packages, operating characteristics under the real project condition are shown by simulation analysis so as to provide a reliable basis for the design and manufacture of the prototype.
The Actuator with Adjustable Stiffness (AwAS) is an actuator which can independently control equilibrium position and stiffness by two motors. The first motor controls the equilibrium position while the second motor regulates the compliance. This paper describes the design and development of AwAS-II which is an improved version of the original realization. AwAS tuned the stiffness by controlling the...
Screw-driven clamping fixture, it's external or internal force and deformation may be the direct cause of manufacturing precision, is one of absolutely necessary parts for manufacturing process. An effective way of predicting the movement and force of the screw-driven clamping is proposed in this paper based on mathematical methods and numerical simulation. As an example, a kind of screw-driven fixture...
Virtual Prototyping (VP) aims at substituting physical prototypes currently used in the industrial design practice with their virtual replica. The ultimate goal of VP is reducing the cost and time necessary to implement and test different design solutions. The paper describes a pilot study that aims at understanding how interactive Virtual Prototypes (iVPs) of consumer products (where interaction...
A geared 5-bar spring/linkage mechanism used for hopping robot is investigated based on the analysis of over-obstacle performance, and the mechanism is able to adjust the energy stored in spring for hopping. The impact of structure parameters on over-obstacle performance is also investigated. The gait of robot in a hopping cycle is analyzed as the action sequence which includes attitude adjustment...
This paper presents a nonlinear friction modeling and its evaluation for rolling friction behaviors in ball screw-driven table systems. The rolling friction behaves as a nonlinear component in the table drive mechanism, especially in the micro-displacement region, deteriorating the control performance in the fine positioning. The friction characteristic, therefore, should be clarified to provide the...
In this study the working principle and characteristics of electrical discharge machining was introduced and in order to resolve the kinematic and dynamic research problems. The part simulation method was used by means of ADAMS based on the virtual prototype technique. The data has been changed by using Mechpro. The virtual prototype model was set up. The kinetic and dynamic simulation was conducted...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.