The suspension cylinder of a mining dump truck is usually stressed to deform and crack. In order to solve this problem so as to improve the service life and safety, the analytic solution meeting boundary conditions fo...
详细信息
Multistage orifice is widely used in large pipe transmission systems. In order to find the key factors which affect the energy dissipation, the orifice characteristics with different geometrical parameters were analyz...
详细信息
Molecular dynamics simulations were employed to perform the nanoindentation analysis of nanocrystalline nickel with different crystal structures (single-crystal, polycrystalline, and nano-twinned) and twin layer thick...
详细信息
This paper presents an improved active disturbance rejection controller to study the trajectory tracking problem of a pneumatic servo system. It is a challenging job to track a given trajectory for pneumatic system wi...
详细信息
ISBN:
(纸本)9781467374439
This paper presents an improved active disturbance rejection controller to study the trajectory tracking problem of a pneumatic servo system. It is a challenging job to track a given trajectory for pneumatic system with strong nonlinearity. The designed active disturbance rejection controller consists of tracking differentiator, extended state observer and nonlinear *** differentiator is designed to arrange a transition process for the given signal and get its corresponding differential *** state observer has advantages in observing states and estimating the nonlinear part of system. Moreover, a nonlinear controller is derived on the basis of backstepping approach. Finally, simulation results indicate the capabilities of the proposed method.
Machine vision is widely used in welding intelligent technology,weld identification is an important prerequisite and *** paper expounds the identification method of non-smooth welds and use
Machine vision is widely used in welding intelligent technology,weld identification is an important prerequisite and *** paper expounds the identification method of non-smooth welds and use
In the test of electro-hydraulic proportional valve,it is necessary to test the high frequency dynamic flow with *** of the limitation of piston stroke,no load hydraulic cylinder is only suit
In the test of electro-hydraulic proportional valve,it is necessary to test the high frequency dynamic flow with *** of the limitation of piston stroke,no load hydraulic cylinder is only suit
An effective pressure estimation algorithm of ABS for motorcycles was proposed in this paper to get the relatively accurate wheel cylinder pressure. Firstly, the performance characteristics of hydraulic control unit w...
详细信息
ISBN:
(纸本)9781509010882
An effective pressure estimation algorithm of ABS for motorcycles was proposed in this paper to get the relatively accurate wheel cylinder pressure. Firstly, the performance characteristics of hydraulic control unit was studied and the vehicle model was established by using BikeSim. Next, the pressure estimation algorithms of master cylinder and wheel cylinder were studied. The estimated pressure is modified according to different vehicle braking stages. Finally, based on an actual motorcycle the wheel cylinder pressure was obtained under different pavements and braking initial speeds by ABS experimental platform to validate the effectiveness of wheel cylinder pressure estimation algorithm. The results show that the actual wheel cylinder pressure can be well tracked by the estimated wheel cylinder pressure with an allowable pressure error.
In this paper, we investigate the problems of stabilization of networked control systems with packets dropout via delta operator approach. A sliding mode controller is constructed to analyze the stochastic stability o...
详细信息
ISBN:
(纸本)9781467374439
In this paper, we investigate the problems of stabilization of networked control systems with packets dropout via delta operator approach. A sliding mode controller is constructed to analyze the stochastic stability of the closed-loop networked control systems. The process of packets dropout is modeled as a Bernoulli process. Sufficient LMI conditions are developed to guarantee the existence of the discrete linear sliding surfaces. By solving the conditions, a linear sliding surface is characterized and a sliding mode controller is designed. Simulation results are given to demonstrate the effectiveness of the proposed approach.
The length variability of telescoping heavy hydraulic trailer wills casue friction and sliding,increasing drag torque and power consumption of steering,moreover,and reducing the security and reliability of steering,so...
详细信息
ISBN:
(纸本)9783037855164
The length variability of telescoping heavy hydraulic trailer wills casue friction and sliding,increasing drag torque and power consumption of steering,moreover,and reducing the security and reliability of steering,so the new type follow-up steering system is designed and studied. In order to reduce the turning radius and tire wear,the adjustable steering wheel structure and double front axle mechanism are *** this basis,the theoretical analysis of the steering system is carried out,and the mathematical model is *** minimum error of actual and ideal angle is regarded as the optimization goal of pure rolling condition,and the simulation optimization and experimental research is *** results show that:the steering structural optimization is feasible, the performance is optimal on the condition that the actual and ideal angle valves of inside and outside wheels of each axis are approximately equal in turning process,and can reflect the advantage of new follow-up steering system in lowering power consumption,improving product life cycle and other areas.
According to the new kind of the upper arm mechanism of the slag pot carrier,optimization design,simulation and experimental research are carried out,in which the combination of conventional design,three dimensional v...
详细信息
ISBN:
(纸本)9783037855164
According to the new kind of the upper arm mechanism of the slag pot carrier,optimization design,simulation and experimental research are carried out,in which the combination of conventional design,three dimensional virtual design and experimental study are *** motion law of multi-segment arc slide way of main arm is given by means of researching the motion process of slag ladle in the main arm slide *** functional relationship among the internal parameters of the arm mechanism,and between load force and arm movement is revealed by studying kinematics of mechanism and dynamics law of the upper arm *** finite element analysis of the upper arm mechanism is carried out to get the weak links of structure strength,and then the improvement solution is *** experiments,the method correctness of optimization and design of upper arm mechanism is testified by the coincidence of the trial results and experimentation results.
暂无评论