Applied Mechanics and Materials Vols. 543-547

Abstract: In order to achieve fine regulation on wheel cylinder pressure of hydraulic ABS, the mathematical model of the solenoid valve and the wheel cylinder are built up through the analysis of the model of key components of hydraulic control unit solenoid valve and wheel cylinder.The relationship between the change rate of wheel cylinder pressure and the duty ratio of control signal is directly proportional. The frequency and effective duty ratio range of control signal of solenoid value is obtained through the simulation experiments. Oil pump is theoretically analyzed. The flow mathematical model of the oil pump is built up. The relationship between the speed of oil pump and the decompression rate of wheel cylinder is obtained. The wheel cylinder pressure fine regulation control strategy based on PID is presented. The control strategy is verified through simulation experiments. The Simulation results show that fine regulation of wheel cylinder pressure is achieved with the proposed control strategy, the vehicle braking effect is effectively improved and the vehicle braking stability is improved compared with the common logic threshold control strategy.

Abstract: This paper presents three algorithms to control the motion of wheeleg robot in unknown rough terrains. First, on the basis of the wheeleg robot, we establish the plane geometry model. By this way, we can easily derive the kinematics and dynamics equations. Based on these equations, we design the control strategy, include three algorithms: posture control, force compensation control and force control. We lay emphasis on researching force control. Then, dynamic simulation of the wheeleg robot is performed in unknown rough terrains to verify the proposed algorithms. Finally, analysing and comparing the three algorithms, and drawing the conclusion.

Abstract: This article discusses the global stabilization problem of nonlinear systems, based on the Lyapunov method. First discussed the situation of a class of two order nonlinear stabilization, sufficient conditions for global stabilization of the system. Secondly, we study the global stabilization of a class of three order nonlinear, got a new conclusion stabilization of the global system, and design a feedback control law of the system stabilization, at the end of this article of the global nonlinear system of general types of stabilization problem, we obtain sufficient conditions for stabilization of the system, and design the feedback control law is the system stabilization.

Abstract: Because of the long mileage of expressway, considering the expensive operating cost, the lighting system is seldom installed in expressway; however, this will raise the traffic accident rate. To solve this problem, the paper introduces an energy-saving intelligent lighting system which can be used in the expressway, and the system can improve and enhance the drivers driving visibility at night or in the bad weather.

Abstract: The vibration of large packaged power equipment can not only cause the structural fatigue damage and facilities damage, but also damage the physical and mental health of workers. It brings hidden danger to normal operation of the large equipment. This paper analyzed the reason and harms of vibration for large packaged power equipment, elaborated technical status of vibration field in large packaged power equipment, and presented future application prospect of intelligent vibration control technology based on information condition.

Abstract: The combined variable stiffness and damping on-off control strategy is investigated using a magnetorheological elastomer (MRE) isolator. A one-degree-of-freedom system has been adopted to assess the efficiency of different control strategies under sinusoidal and random and pulse excitations. The obtained results illustrate that a single tunable stiffness control with maximal damping values under both excitations can simultaneously performs better control of displacement than using minimal damping if the relative displacement and relative velocity of load are in contrary directions . Moreover, on-off variable stiffness control plays a more important role than damping control, therefore it is feasible to only control magnetic field to change MRE elastic and damping property for simplicity.

Abstract: In this paper, a parametric modeling and simulation method is proposed, which provides a virtual simulation test environment for photovoltaic radar. A graphical user interface (GUI) is developed using VC++6.0. With this system, the integration of CAD/CFD application is achieved. Application examples show that, this system can significantly improve the efficiency of aerodynamic design. Finally, it is proved that the control process of developing RFID middleware simulator has superior performance and expected effect.

Abstract: This passage introduces using inverters to achieve high efficiency and energy conservation, and using distributed remote data collection system to achieve anti-interfering, intelligent and energy-saving combined pumping station. The passage emphatically analyzes pump station system's structure, the energy-saving profits of inverter application, and the anti-interference of remote data collection. This system has been put into operation in several industrial corporations, and the reliability and energy conservation of it have been fully affirmed; therefore, it can be used as reference for other similar systems.

Abstract: In this paper, a new design of integrated power is presented, which uses a modular structure, distributed control system. According to the technical requirements of mechanical and electrical test equipment for the power system, the BCT of the switching power supply is used. The design of DC power is described in detail in this paper. The trial operation proves: this integrated power is high common, high stability and high integration.

Abstract: According to the technical requirements of controlled fire extinguisher filling pretreatment of self-propelled artillery, in this paper, we use the method of principles tunnel to control the air flow, combined with multi-parameter self-tuning fuzzy PID control, different models of controlled fire bottle filling pretreated at the same time are achieved, and the adaptive capacity of controlled fire extinguishers pretreatment equipment is improved. After the trial, the device has high synthesis, good versatility and high stability.