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Hydro-viscous speed clutch (HVC) is a central control element of the driver system. Because of nonlinearities and hysteresis of the clutch, the setting of control parameters has a significant impact on the performance of the speed control system. This paper studies the HVC of a vehicle temperature control system, and analyzes the parameters tuning method of a PID controller for the closed-loop control...
The paper is focused on investigating the stiffness characteristic of a hydraulic assisted turning system in low-floor trams. Equations to illustrate the operating processes of the simplified and the completed systems are presented respectively. Simulation works done in Matlab/Simulinkshow that the throttle valve and damping cylinder will reduce the stiffness of the system. The results also display...
Hydraulic power steering (HPS) is generally used in heavy vehicles. For the purpose of reducing the energy consumption of HPS as well as improving high-speed stability and low-speed maneuverability of heavy vehicles, the electromagnetic clutch hydraulic power steering (ECHPS) is proposed, which is characterized by an electromagnetic clutch to control the steering pump. The electromagnetic clutch consisting...
To meet the requirements of increasing off-highway vehicle productivity and of higher safety requirements, an improvement on boom/bucket stability of off-high way vehicles has been commanded in industry on multiple platforms. Various control algorithms have been developed to deal with the motion compensation problem. Developing and implementing the controllers directly on a vehicle is challenging...
This paper analyzes and simulates the model of automotive pneumatic braking pipeline pressure response delay and build pressure response delay testing system based on dSPACE system to test the different diameter and length of nylon line pressure response delay. The influence of test data parameters on the pressure response delay has been analyzed, fitting the different pipe diameter calculation formula...
The paper presents a control algorithm hydropneumatic system with smooth changes in the elastic characteristics of the impact of various kinds of dynamic and kinematic disturbances. We had made the analysis of the control object, which allowed us to offer a common structure of the automatic control system. Particular attention is paid to the description of control principles inherent in the computing...
Synchronization problem was the principal problem and technological challenge for hydrostatic driving tracked vehicle in straight working conditions. The asymmetry caused by parameter perturbations, friction resistance coefficient, leakage coefficient and pump displacement are taken into consideration. These factors were treated as disturbance inputs, and were suppressed by control algorithm. A simulation...
Robotics research is motivated by the desire to develop tools or machines to accomplish tasks in place of humans or undertake tough activities which cannot be done by human labour. In order to design advanced robots, one approach is the learn from mechanical structures and locomotion mechanisms of animals in the natural world. This survey focuses on legged dynamic locomotion of robots which are mammal-like...
Ebola hemorrhagic fever, causing by the Ebola virus, is a kind of communicable disease of the acute hemorrhagic symptom and is highly infectious for human beings. In order to prevent and control Ebola effectively, this paper establishes an epidemic model and a drug delivery model to study the Ebola virus's drug delivery system.
Hydraulic power assist (HPA) vehicle control strategy is always a hotspot in the field of hybrid vehicle research. To improve the HPA vehicle entire fuel consumption efficiency, many researches have been done to make the energy recovery rate higher. Well, according to the engine's fuel consumption curves, the fuel consumption does not proportion to the energy requirement, which means the energy recovery...
The traffic congestion in modern cities deteriorates urban bus' fuel economy and pollutes the atmosphere seriously, Hydraulic hybrid system becomes one of the efficient ways to improve motor's fuel economy and reduce its pollution under the frequent starts and stops. In order to improve the power performance, a front located parallel hydraulic hybrid (FPHH) configuration is proposed. Through dynamic...
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