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Aerial scene classification has been drawn much attention in numerous surveillance applications such as terrain landform analysis and traffic situation assessment. However, due to the diversity of aerial scenes, they present large intra-class variations and make the classification process very challenging. To handle such problems, a batch loss regularization based deep learning method is proposed...
A kind of closed hydraulic system controlled by servo motor and constant pump is introduced for controlling the experimental press. By using AMESim and Adams, the hydraulic system model and motion model of the beam of the experimental press are established and co-simulation is carried out. PID controller is used in this hydraulic system to improve the control performance. Simulation results indicate...
The hydraulic drive legged robot with high performance is introduced in this paper. When the robotic foot contacts the ground, the collision and impact can easily take place. Therefore, the robotic leg joint should possess certain compliance. In order to enhance the compliance of robotic leg joint, the paper researches the position-based impedance control method. Besides, the analysis for the composition...
For the vibration of the aero pipeline and the conveying pipeline exists universally and the vibration has effects on the pipeline life, the detection accuracy and the system stability, the research on the natural characteristic of the pipeline vibration has promising prospects. In this paper, the vibration mathematical model is built with the simple and practical Rayleigh-Ritz energy method to calculate...
There is a new type of hydraulic accumulator has been presented in this paper, and for the magnetorheological fluid(MRF) chamber of the new hydraulic accumulator, the modeling and the solving method for the fluid-solid interactions and magnetic- fluid interactions in the MRF chamber are provided and also studied by the finite element method. And also, using the ADINA software, the finite element network...
Identification of steady state is an important task for satisfactory control of many processes. Due to the disadvantages of the traditional steady-state identification (SSI) methods, the adaptive polynomial filtering (APF) method was used for SSI in this paper. Furthermore, the presence of gross errors can corrupt the steady-state identification method, giving undesirable results. The APF steady-state...
For quick realization of controller design and optimization of parameters in a project, avoiding the long-time and danger during debugging the project, a new co-simulation control method based on dSPACE and Siemens PID module FM355C was introduced. In this method the close-loop control system was set-up with the rapid control prototype method based on the dSPACE and its hardware environment, using...
The Opposed Multi-Burner (OMB) Coal-Water Slurry (CWS) gasification is a new large-scale coal gasification technology with higher product yield, lower oxygen and coal consumption than that of Texaco CWS gasification technology. However, current furnace temperature measurements of OMB and other gaisifiers are unstable and even short-life due to the extreme internal environment: high temperature, strong...
Accumulator is an important component of the fast forging hydraulic press system, and it has a great impact on the return precision and energy consumption of fast forging hydraulic machine, so do simulation and experiment study on the fast forging hydraulic system has a certain need for performance analysis. In this paper, we found the mathematical model of fast forging system and do simulation study,...
In this paper a new intelligent dual-line lubricant bus system was introduced. SIEMENS PLC is central controller, the PROFIBUS is the communication mode, the touch screen is to show the working status data and set data can be input through it in this system. Through measuring the oil temperature, oil pressure, and pressure difference etc signals, the system can automatically control the oil to be...
On the basis of studying the components and the dynamic peculiarities of rolling force control system in a 1500 skin pass mill, a mathematical model was established. The trend term is extracted from original signal using the wavelet multi-scale analysis, most noise signal was deleted, and the data suitable for system identification are obtained. Based on the data the characteristic parameters were...
The secondary regulation technology is a new energy saving hydraulic transmission technology, which can make several loads work parallel in a constant network system and very suitable for the drive axle test system. Secondary regulation load test of drive axle is a three axis loading system. The basic theory of the test system is analyzed, and the mathematic model of the secondary regulation is found...
A novel over modulation methodology for dual bridge matrix converter (MC) is first put forward in this paper. Based on amplitude control of the rectifier side and inverter side, an over modulation methodology is presented. First the rectifier side is separated into six intervals to get the maximum DC voltage, and then a novel over modulation strategy is invented for the inverter side, which can manage...
A lot of research has been made on space vector modulation (SVM) strategy of matrix converter, but research on over modulation strategy of MC is almost blank. This paper analyzed conventional control theory of two-stage matrix converter, derived voltage transmission characteristic, then presented an over modulation method, which covered the entire over modulation range. The method was divided into...
The paper firstly introduced the composing and the theory of the vehicle transmission loading test stand based on secondary regulation technology. The test stand includes speed control system and torque control system. Then the theory of these two control systems is illuminated and theirs mathematic models is established in the paper. When there are multi subsystems in the whole system, it would be...
A PC based CNC system for planer cams grinding is presented, and some key techniques are also studied. Among them are steady speed grinding, automatic orientation of cams block, remote control, and automatic programming. It is shown that with this integrated system, the quality and the productivity of cams manufacturing are greatly promoted. This kind of integrated system can also be used in other...
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