Applied Mechanics and Materials Vols. 716-717

Abstract: This paper mainly focuses on the modeling and simulation of a three-DOF high-speed parallel robot which is widely used in the design of an enterprise vials testing equipment. For high-speed parallel manipulator rapid modeling and collaborative simulation, we study the two methods. One approach is to transfer the 3D SOLIDWORKS model into MATLAB/ SIMULINK model. Another method is to convert the three-dimensional model of SOLIDWORKS models into ADAMS. ADAMS and SIMULINK work together as a simulation platform. The results show that the two methods could provide the efficient and significant simulation platform to research the control strategy of High-speed parallel manipulator.

Abstract: Aiming at the request of EPS system for the robust stability and the dynamic characteristic, the dynamics model of an electric power steering system (EPS) is established , the outer ring mixed H₂/H_∞ control based on genetic algorithm decides the values of the target torque and solves the perturbation problem, the inner ring control with PID control algorithm will never compromise with current real-time control. Simulation results show that the application of mixed H₂/H_∞ in the outer ring for current decision can make the EPS system stable and realize the ideal control performance, can also obtain the low frequency information from the surface of the road and depress the high frequency interference.With the application of current tracking loop PID control, EPS system has good dynamic characteristics of the target current real-time tracking, so that electric power steering system has better stability and traking performence.

Abstract: This article is based on PLC automatic control of variable frequency constant pressure water supply system in the application of beverage factory, the automatic water supply system of constant pressure control method and reasonable design. Analyses the composition of control system structure, working process and PLC ladder diagram control process and the touch screen man-machine interface design. The system is reliable in performance, convenient operation, high automatic degree, intuitive interface, has higher application value.

Abstract: In order to achieve the integrated process of wastewater treatment, this research designs a kind of intelligent control system that can monitoring water quality parameters in real-time, which is small, convenient control, high efficiency and low consumption. The acquisition station and control station of the system are based on STM32F107 and industrial control tablet, combined with IASBR process to achieve simultaneous removal of organic matter, nitrogen, phosphorus and COD in wastewater. This system can monitor water temperature, pH, ORP, DO and other water quality parameters. Aiming at the uncertainty of the DO in process control, the fuzzy control method is proposed to realize the rationalization of aeration, meet the needs of wastewater biochemical treatment of the DO. It has a certain reference value to the intelligent development of integrated wastewater treatment.

Abstract: This paper proposes a design of pneumatic high-pressure mud pump based on PLC control. According to this method, we design the three-cylinder reciprocating single acting pneumatic high-pressure mud pump, and give the details of PLC control system and high-pressure pump body, finally briefly describe the working principle and the experimental results.

Abstract: This paper designs a new mechatronic modeling and simulation platform, which uses Solidworks to establish the mechanical model, and uses LabVIEW intelligent network library function to realize mechatronic control. Combining with VC software it realizes the simulation results visualized output, which realizes the co-simulation design of SolidWorks, LabVIEW and VC software. With the help of this system, engineers can establish mechanical model by computer software, and use interdisciplinary field theory to analyze the product key performance indicators in the virtual operating environment, further visual processing, and according to the simulation data to improve and optimize the system. It provides a new method for computer research and development of mechatronic products.

Abstract: This paper designs a new ZigBee intelligent robot communication control system, which realizes one to many data transmission. Upper computer can send commands to control multiple mobile intelligent robots to do the action response through wireless module. Slave computer can also send data to host computer to achieve remote monitoring, and has high relay ability. In order to verify the effectiveness and reliability of the system, this paper tests the system and obtains 3D signal and robot node control distribution. Through the analysis of the system time delay and control signal features, we found that the system has good stability, which can satisfy the design need of multi-intelligent robot control. It provides the theoretical reference for the study of ZigBee automation control.

Abstract: This article is based on the theory of fractional calculus control, and put forward a kind of fractional order PI controller design method for lateral attitude control system of unmanned aerial vehicle (UAV) model. And the unit step response of the control system is analyzed in the simulation to improve the UAV flight control system stability and robustness. Use the controller parameter tuning method and combined with fuzzy reasoning to design IOPID controller, FOPI controller and fuzzy fractional order PI controller. Then, by exploiting Matlab, the frequency domain response and unit step response characteristics of the different control systems can be plotted. The results verified that the designed fuzzy fractional order controller for the attitude control system is effective.

Abstract: In this paper, a new control method for large time delay system is proposed. Firstly, the decreasing time delay controller is used to remodel large delay time plant into small delay time plant. Then, a fractional robust proportional-integral controller (FOPI) is designed, using the phase margin and cut-off frequency at a specified point in the Bode plot of flat robust conditions, to guarantee the desired control performance and the robustness of the high order system to the gain order system. For comparison between the fractional order proportional integral controller and the traditional integer order PID (IOPID) controller, the IOPID controller is also designed following the same proposed tuning specifications. The simulation results indicates that the both designed controllers work efficiently. Furthermore, the FOPI controller makes the large time-delay system get better control effect, the system has high robustness, adaptive ability and anti-jamming ability.

Abstract: A new training method is proposed, which could solve the problem of that parameters of fractional order controller are not easy to be selected. This method which based on the principle of gravity optimizes parameters. Random initial parameter based on step was set as coordinate form which in the midpoint of the multidimensional space. The error between the actual output and the target output was set as radius. This method had advantages which could not need to calculate the gradient and could randomly select initial. Through the simulation experiment, this method is successfully applied in the fractional order PID controller, which obtains the optimal parameters.