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According to the principle of generating-forming method, this thesis introduces a method of addendum lines' chamfering for the driven gear in spiral bevel gear pair. The mathematical model of addendum lines' chamfering is proposed and the equations of chamfering trace are deduced. The problem is transformed into constrained optimization, which can be solved by the use of the MATLAB optimization function...
In this paper, theoretical analysis and numerical simulation of a vertical vibrating system with an impact damper is presented. Different impacting forms are occurred in system under simple harmonic excitation. Phase diagram of periodic motion and temporal changes of velocity and displacement in time domain are given. Two important parameters of mass ratio and restitution coefficient are discussed...
In this paper, motion equation of vertical impact damping system is established. Both parameters domain of stable periodic response and corresponding vibration reducing effect are attained by numerical simulation under pre-assigned excitation parameters and structural parameters. Evolving approach of transition from period doubling bifurcation to chaos of vertical impact damping system is revealed.
This paper introduces a design method of heating welder temperature control system for PE battery clapboard based on 89C52 single-chip, and gives hardware circuit diagram of temperature control system. It makes simulation and experimental effect comparison between PID control and integral separation PID control with Smith prediction, proved that integral separation PID control with Smith prediction...
This paper studied the cutting experiments of dry turning the cemented and hardened steel 20CrMnTi using cemented carbide cutting tools, ceramic cutting tools and PCBN cutting tools. Through measuring the value of surface roughness in varying cutting conditions, analyzed the influence of cutting speed and the feed rate to the surface roughness, obtained two empirical formulas Ra-v and Ra-f. This research...
Friction in the electro-hydraulic servo system makes tracking and pointing accuracy lower, it is one of the most important influence factors. This paper proposes a nonlinear adaptive friction compensation method based on analysis of the position-control system of valve-control asymmetrical hydraulic cylinder and the LuGre friction model. Dual nonlinear observers were constructed to estimate the friction...
This paper established mathematical model based on control theory for electro-hydraulic position servo system, used Simulink to simulate system model, and applied M files and module mask function to simplify the system simulation process. This electro-hydraulic position servo system adopted PID controller. The PID control is the abbreviation of proportion, integral and differential control, its value...
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