Papers by Keyword: Coordinate Control

Abstract: Building a dynamic coordinated shifting control model of hybrid electric bus, analyzing of dynamic coordinated shifting process to achieve good perfomance by coordinated control of main motor and engine, clutch control, active synchronous motor, automatic transmission and so on. This article provides motor torque compensation algorithm to achieve no torque interrupted and motor active synchronization algorithm to reduce the shift time. From the results show that the control strategy realizes no torque interrupted and greatly reduces the jerking to achieve the smooth operation in the shifting process.

Abstract: In pure electric vehicle and hybrid electric vehicle, the adoption of motor barking for energy recycling make its braking control more complicated. Making good use of braking energy can improve vehicle efficiency. A new method was developed to coordinate the motor regenerative braking and ABS braking. Which identify the road condition with real time basing on wheel speed information from four wheel speed sensors. Then control system decides the braking force provided by ABS system. The residual braking force is produced by motor barking to meet total braking force requirements. The two braking forces are coordinated by control system to perform brake function of vehicle.

Abstract: The ABS, motor, Battery, fly wheels, wheel and roller are used to built test bench to measure coordinate control strategy between ABS braking and regenerative braking. The test bench can also be used to simulate engine brake during vehicle deceleration, and ABS control methods. This can reduce development time and cost effectively.

Abstract: In position control system of hydraulic excavator, the uncoordinated speeds between joints make quite trajectory errors no matter how well each joint performs. In order to solve this problem, a cross-coupled pre-compensation method is introduced in and applied to hydraulic excavator servo control system to solve this problem. Furthermore, in order to compensate for the nonlinearities of excavator and friction resistance, a nonlinear controller with angle velocity error observer and acceleration feedback is designed. Experimental results show that the proposed control strategy is effective in improving tracking accuracy and response ability when subjected to external load.