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Flexible force sensor for rapid prototyping is designed and suggested with a suitable process for molding. A physical mixing of both CNT and PDMS shows lower percolation limit which shows proper electrical and mechanical properties. For 1% of CNT/PDMS composite, the mechanical and electrical properties were investigated up to 120kg and kilo-Ohm range of sensor resistance. By comparing with commercial...
We explored the affordances of using visuo-haptic simulations to improve conceptual understanding and representational competence of the concept of friction. Visuohaptic simulations are computer-based simulations that encode mathematical and physical models of certain phenomena and provide visual and tactile feedback. Users can see the simulation and feel the friction with their hand by using a special...
In this paper we propose an approach for the determination of static force characteristic of a plunger-type AC electromagnet using 2D numerical model developed in QuickField software. The attraction electromagnetic force is calculated using Maxwell stress tensor method. The numerical model is an AC magnetics problem coupled with the coil electric circuit. The numerical model has been experimentally...
The paper presents an overview of various steps required for solving the problem of designing electric drives for traction applications. The design problem is solved as an optimization problem with multiple objectives subject to various constraints governed by physical characteristics and limitations of materials and specific parts used for the assembly of electric motors and power converters, international...
In this paper, the force analysis of the blade roller of the tiny cultivator is described firstly. The static analysis of the blade is carried out by using the Simulation plug of SolidWorks, and the data of von mises stress, resultant displacement, equivalent strain and safety factor of the blade are obtained. Then the modal analysis of the blade roller is carried out, and the data of the top ten...
This paper faces the technical and economic challenges related to the design of a green recharge area for electric vehicles at the Campus of Palermo, Italy, with the aim of reduce both costs and pollution connected to the charging process. Based on the behaviour of the student population, the electrical load is identified and two possible solutions are evaluated to manage the peak load: an orientation...
A hybrid aerial vehicle (HAV), featured combination of a quadrotor system and a fixed-wing system, is one of the most promising configurations having both a vertical take-off and landing (VTOL) capability and high cruise performance. In this paper, a HAV has been designed and prototyped to analyze the performance of the HAV. The specifications of the HAV are summarized. The aerodynamic coefficients...
In this paper, the emergency braking of high speed train is studied, and the relationship between the braking force, resistance, speed and deceleration is discussed. According to the Newton's second law of motion, by discretizing the speed and displacement, the emergency braking model of high speed train is established. Further, the unobserved braking parameters of model are identified by the iterative...
To research the effect on the canard rudder aerodynamic layout for the projectile correction, the steering gear model under different aerodynamic layout was established. Various kinds of aerodynamic parameters were obtained through simulation. Through the establishment of the ballistic model of suitable for less spin correction projectiles, the capability of correcting has been received under the...
In this paper a bio-inspired tactile whisker sensor made by 3D printing is discussed. Whisker inspired sensors were printed using flexible dielectric and conductive thermoplastic poly-urethane (TPU). The conductive TPU is used for strain-gauges facilitating resistive read-out. A single whisker sensor contains two strain-gauges allowing to determine both the force acting on the whisker as well as the...
The authors proposed a basic method for generating a colhsionless walking gait of a non-straight-legged biped and analyzed the fundamental gait properties. This paper then discusses the transfer energy efficiency of the generated gait in terms of specific resistance. Numerical simulations show that energy efficiency can be improved by promoting the asymmetry of the leg shape, and by keeping the positivity...
In modern transportation, electric bicycles play an increasingly important role e.g. in urban traffic as well as for commuting and recreational activities. Nevertheless, a limiting factor of electric bicycles is the battery capacity. One approach to increase cruise range is regenerative braking, where kinetic energy is recovered during the braking process and used for recharging the battery. In this...
A novel method of load resistance energy increase in the electric circuit with constant electromotive force is proposed in this paper. The method refers to electrical engineering. It was designed on the base of maximum power point calculation and may be used in the design of electric circuits with constant electromotive force to increase energy in load resistance.
By using a Papkovich Neuber potential based 3D numerical contact modeling method [1], it has been shown that using a wave structured contact surface topography can reduce contact interface resistance by a factor of 2 at a given normal load. It has been proposed that a wave structured topography can be used to reduce contact normal force as a method to reduce connector mating forces. Since there is...
This paper studies on the dynamics model and control method of quad-rotor UAV for research. Firstly analyzes the dynamic characteristic of quad-rotor UAV and establishes the nonlinear dynamics model of quad-rotor UAV; and then applies the PID control to three channels of pitch, roll and yaw based on the established model, and the simulation results show that PID control is effective for the quad-rotor...
This research covers carbon-based strain sensors which are designed and printed onto flexible substrates. Conductive nanocomposite of Polydimethylsiloxane (PDMS) and Carbon Black (CB) powder with 10% of CB have been used as the sensing element utilizing its flexibility and conductivity while silver conductive paste is used as the electrode for the strain sensor. Several designs with different length...
The evaporative cooling system for wind power generator inclines at an angle of 3∼5 degrees. Due to the special structure, it forms a liquid-gas two-phase self-circulation. Two-phase flow self-circulating system is a typical nonlinear dynamic system. So it is important to study the nonlinear characteristics. In this paper, the nonlinear characteristics were studied through theoretical analysis and...
A novel electromagnetic clutch system is proposed to resolve the mechanical and electromagnetic impacts in the in-wheel motor drive electric vehicles. The dynamic analysis of the system is presented for researching the engagement process. Based on the dynamic analysis, the relationship between the action forces in the engagement is studied and the range of clutch's angular deflection is given for...
The Electric Motor Train Units (EMU) load is the main load of the power traction system for high-speed railway, so the accuracy of load characteristic description has an important influence on establishing traction load model. This article designed the logical control strategy for traction drive system and set up a complete digital simulation model of the traction drive system for CRH2 EMU, and then...
In this paper the displacement analysis of an under-constrained parallel robot supported by flexible shafts is addressed. The problem consists of identifying the equilibrium poses of a moving platform when the shaft lengths are changed. Similar to under-constrained cable-driven parallel robots, the moving platform preserves some freedoms once shaft lengths are fixed. Thus, kinematics and statics must...
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