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The MRF (Magnetorheological Fluid) working mode and mechanics model were firstly constructed, an MRF damper system was formed by designing MRF damper, application to the milling chatter control was studied. Theoretical analysis results show that the MRF damper's stiffness and damp increase with magnetic field strength's increment, the main vibration system amplitude decreases with magnetic field strength's...
In this paper, the flight control system for a small size unmanned helicopter is discussed. The system is mainly used as a platform for the research of autonomous flight controller. So the modularity and expansibility is preferred. Firstly, the hardware of the system are designed based on DSP and FPGA. Then the function modules of FPGA is provided, which are designed to ensure the system's expansibility...
This article uses unascertained mathematics measure model to assess energy-saving conditions of construction management process. The target of this method is minimum energy consumption in the whole system of construction and is to identify factors which may cause energy wasting happen during construction. This method can prevent the occurrence of energy waste. In order to do the quantitative analysis...
On the basis of analysis of traditional discrete cellular automata and Agent-based models, a simulation model has been improved and optimized. The model combines method of the traditional discrete cellular model's investigation on the surrounding environment with the idea of describing individual behavior by the Agent model. Fully considering the escaping individuals' difference and taking into account...
Generally, studies on inverted pendulum system only considered the viscous friction, the system with controllers designed based on this model was stable in simulations. However, when the controller was implemented in experimental system, small oscillation resulted. This paper give strong evidence that stick-slip friction between the cart and the track is the source of the small amplitude oscillations...
This article addresses the problem of enabling a robot manipulator to interact with the environment using the concept of impedance control. As the performance of the Position-Based Impedance Control is highly dependent on the accuracy of the position controller first a time-varying integral plus proportional-derivative controller is applied to the system which is capable of both regulating and tracking...
In this paper, a novel called Tri-axis Differential In-pipe Robot without tether cable, featured with adaptive differential capability is developed as a mobile platform for long distance inspection of moving inside pipelines. The robot has several remarkable features superior to the others such as an differential mechanism with adaptive differential capability in elbow. Consequently the in-pipe robot...
The flight control system is the core of small unmanned gyroplane, in this paper, micro controller AT91M55800A chosen from ARM7 series is used to construct the control platform. In order to improve the stability and robustness of small unmanned gyroplane, this paper puts forward a kind of PID controller which based on improved Differential Evolution Algorithm so that the gyroplane can finally achieve...
This paper presents an accelerated life testing method to solve the problem of in-pipe robot reliability in quantitative analysis. By established inverse power law probability density function model based on Weibull distribution, the results of accelerated life testing can be used to extrapolate reliability features of in-pipe robot under the normal condition, especially for single or rare prototype...
This paper presents the design of a computer aided testing system aimed to the vane pump performance test, in which sensors and the PCI cards are at the bottom layer, the computer is the core of the control system, VC++ is the platform for software designing. In this design, the loading mode is used with proportional valve, PID control method and PWM technology service the temperature control, speed...
China is a large agricultural country, but the water resource amount can not meet the demand of irrigation, Through setting up the long-range monitoring system of irrigated area water that is operated very good, can improve the utilization efficiency of irrigating water resources, to economize irrigate water consumption greatly. This paper introduces Multi-Agent theories in the long-range monitoring...
Because have very high ability of overall situation searching and convergence speed, show excellently in keeping solution variety, the niche genetic algorithm(NGA) is widely used to solving various kinds of combination optimization problem, but the traditional niche genetic algorithm(T-GA) have the problem that the discrimination standard of Euclidean distance between two individuals is not development...
This paper introduces a kind of simple structure, convenient installation and lower cost energy-saving device, that can reclaim and utilize the household air-conditioning condensing heat and is applicable to different kinds of condensation system. When the temperature of the condensing agent rises to a certain extent that needs to cost power to drop it, the device can utilize the heat energy to water...
An intermittent impact type escape apparatus used in high-rise buildings based on the principle of escapement mechanism usually applied in clock for time controlling was designed in this paper. The escapement mechanism in escape apparatus can consume gravitational potential energy of body. Applied the modularized design method, mechanical system of the escape apparatus consisted of a transmission...
Existing heating system of hot press mould was analyzed to state its defects existing in production. On this basis, feasibility of improved scheme was introduced. Heating processes for improved and unimproved heating system were simulated with the application of MSC. Marc software. Temperature fields of mould were obtained. The results show that heating device with inner electrical iron cores can...
This paper devises a new deicing vehicle, which deices ice by the kinetic energy generated by centrifugal force. Because the time that deicing part act on ice is very short, the working theory of it is different from that of traditional mechanism that the petrous hits on the petrous. It has resolved the problem that the surface of road is destroyed by traditional deicing vehicle by fitting a set of...
Aiming at flaws of patient's pain and high expense caused by surgical treatment of genu varum and genu valgum, this paper puts forward a new method based on biomechamics and cartilage-derived growth theory to cure genu varum and genu valgum, in which different kinds of the external force are imposed on knee to stimulate the histiocytic growth of different parts of patient's knee, and develops a prototype...
A new capsule robot prototype with function of radial clearance compensation driven by external rotating magnetic field is proposed, based on the established fluid dynamic model, fluid dynamic pressure and swimming speed of the robot with respect to the clearance between the inner pipe wall and the surface of the robot is analyzed. According to the phenomenon that axial propulsion reduces greatly...
This paper introduces a method using mechanical dynamic analysis software ADAMS to build a simulation model of guiding mechanism for cable climbing robot. By means of this model and simulation, the influences of many factors, including operation attitude angles, support stiffness, preload, dimension of supporting wheels, to the offset of robot body in working status are obtained. The method presented...
Design and analysis on the new type of Pneumatic Artificial Muscle (PAM) with elongation and torsion is presented. The PAM we developed can not only elongate but also twist about its axis when supplied the air pressure. We establish the theoretical models of axial elongation using strain-energy function; analyze the twist performance applying the Moore integral; discuss the influences of wire diameter,...
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