Advanced Materials Research Vols. 989-994

Abstract: Coiling tension control system is the main control means to ensure the quality of the rolling process. According to the characteristics of coiling tension control characteristics and the requirements of actual engineering, establish the mathematical model of the double closed loop control system and use the traditional PID to tuning the model parameters. It is proved by Matlab simulation experiments that traditional PID can effectively improve the response process of coiling tension control system and greatly enhance the dynamic and steady-state performance.

Abstract: The traditional hydraulic shock absorber suspension converts the vibration energy between the sprung mass and unsprung mass into heat energy. The realization of vibration energy recycling can reduce vehicle's energy consumption, developing ideals for the research of the active suspension/ semi-active suspension. Four kinds of energy reclaiming suspension's structure principle is introduced in detail and the development restricting factors of the suspension at present are worked out through the unified measure, indicating the technology breakthrough points.

Abstract: Through researches a new method of bending fatigue test of vehicle steering wheel was raised in this paper. The new method is closer to the actual using condition of vehicle steering wheel, which enhances the reliability of the test.

Abstract: According to the mechanism of the main reducer abnormal sound signal is different from the interfering noise, a detection method based on the digital signal processing technology was proposed. With the qualified main reducer noise signal as the reduction sample, the detected main reducer noise signal is de-noising by means of spectrum analysis, and then be estimated whether the detected main reducer is qualified based on certain threshold values. Finally, the detection method is validated, which provided a new thought on the final drive abnormal sound on-line detection.

Abstract: Based on the theory of gear dynamics and contact, the paper uses multi-rigid-body dynamics software ADAMS to build transmission simulation model. The model takes the highest shift gears of a transmission as objects to finish gear meshing simulation analysis. The corresponding meshing force and its Fourier transform results are acquired based on the analysis to get the transmission gears meshing properties.

Abstract: For the more complicated principles and the lower accuracy for the existing methods of the measurement of the analog circuit parameters, the paper constructs a measurement system for the analog circuits parameters based on the multiplier. The signal source generates two orthogonal sinusoidal analog signals with same frequency, and then one of the signals goes through the analog circuits. Then the multiplication and filtering are completed with the two DC signals. At last the phase and amplitude of the analog circuit are obtained through the DAQ and LabVIEW software. The amplitude and phase errors are less than 3%. The results show that the system has simple circuit, fast speed and high accuracy. So it is a feasible plan for the measurement system of the analog circuit parameters at present.

Abstract: In order to analyze the steering dynamic characteristic of the skid steer loader, refer to the theory of tracked vehicle, established the steering Kinematic and dynamic models. use AMESim software platform and Motion software platform to establish a Co-Simulation model of steering system based on theoretical analysis of skid steer loader steering travel. The results show that: the model can predict the dynamic characteristics of the skid steer loader skid steering process.

Abstract: We build the model of Modified CA(cellular automata) to analyze the right-hand drive principle, at the same time we put forward the New Principle (In the principle, right lane is the high-speed lane and vehicles driving on it normally. This paper divides the whole principle process into four stages. The overtaking vehicle (A) send signals to the overtaked one (B),B moves to the low-speed lane to let A pass, A moves straight to finish overtaking and B returns.) and its creation is optimized by the model. At last, we use the model to analyze the traffic conditions in different principles or vehicle density or speed limit.

Abstract: On employing GSM network as the way for data wareless transmission, this thesis puts emphasis on introducing operating principle of TC35i module and AT89C51 as well as the perpheral interface circuit. Meanwhile, it designs the system hardware circuit, computer control solfware and SCM system solfware with offering the application program for TC35i module and AT89C51 interface partially. After the debugging and practising, it comes to the data transmission terminal with GSM module.

Abstract: Cable suspended parallel mechanisms have potential applications in offshore cargo handling. Due to the flexibilities of the cables, the cargo will vibrate under the excitation of wave-induced ship motion. This paper analyzes the vibration of cable suspended parallel mechanisms with dynamic base platforms. Based on the linearization of the dynamic model about a nominal trajectory, the vibration equation is given. The natural frequencies, sensitivities and frequency responses of the mechanism are derived from the vibration equation. Numerical results of an example are discussed, which validate the analysis given by this paper.