This paper presents a multi-objective energy management strategy for hybrid electric vehicles. It aims at reducing fuel consumption and minimizing battery wear simultaneously while fulfilling system’s constraints. A control-oriented differential model is considered to account aging effects, an algorithm developed identify its parameters. The formulated as optimal control problem solved by Pontr...

The conventional electric loader uses a motor instead of an engine, which aligns with the current energy-saving and emission-reduction trend. However, motor’s speed control performance overload capacity are under-utilized, actuator suffers from potential energy waste problem boom arm. This study proposes variable pressure margin recovery system for actuator. It combination permanent magnet sync...

Identifying risk components is crucial to improve product quality. Failure mode and effects analysis as a useful assessment method has become prevalent application in design. However, the critical data, which contain failure causality relationships (FCRs) between modes, importance correlations among factors, customer requirements of component, are not considered. This study develops an integrat...

Safety-critical systems usually need to be accompanied by an explained and well-founded body of evidence to show that the system is acceptably safe. While reuse within such systems covers mainly code, reusing accompanying safety artefacts is limited due to a wide range of context dependencies that need to be satisfied for safety evidence to be valid in a different context. Currently, the most c...

This paper describes a response acquisition system composed of some spindle accelerometers and a time synchronized on-board GPS receiver developed in order to collect the dynamic response of vehicle riding on an unpaved road. A method of time-space conversion for calculating the response spectrum is proposed to eliminate the adverse effect of time-varying speed, based on the transform from the ...

Authors have been conducting research on an autonomous system for loading operation by wheel loader. In loading operation with V shape loading method, a time for travelling is the dominant factor for the cycle time. The path should be modified varied condition of the working place. To achieve quicker and reliable operation in autonomous loading operation, new path planning method is developed. ...