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It is a timeless and actual problem to develop vehicle's active safety. In case of commercial vehicle category more sophisticated difficulties could be found. Increased mass and inertia are the fundamental differences between a usual passenger car and a truck. At the same time, the low series number requests cheap solutions. The aim is in this way to ensure low cost solutions to control increased...
The paper presents aspects concerning the modeling, driving scenarios and control structures of two classes of vehicular power train systems with continuously variable transmission (CVT). The modeling includes an analysis of the systems' components which include the spark-ignition internal combustion engine, the torque converter, the continuously variable transmission and the wheels. The CVT offers...
This paper presents a specific simulation modeling of a hydraulic system with regenerative braking used to improve vehicle emissions and fuel economy. To optimize the bus integrated performance, an exact modeling of hydraulic component has been built up in Matlab/Siumulink. The simulation has been run on both designated parameters and CYC-UDDS drive cycle. At last, experiment results show that the...
In this paper, an optimization is reported for the determination of time response (Tr) and power (P) of Electric Vehicle. The electric constant of back-electromotive-force, stator d- and q- axes inductances, switching period, battery voltage, stator resistance and torque gear ratio were selected as factors being able to influence the Tr and P. The optimization process was carried out with Doehlert...
Reconnaissance robots can reduce the danger of hazardous places by providing information before human personnel take action. In practice, the robot platform should be small and light. However, this fact leads to a scaling issue with terrain that poses a huge obstacle for the vehicle. The problem can be solved by the inspiration of nature. This paper presents a sliding mode control (SMC) of locomotion...
This paper presents a motion control method of 6WD/6WS (6-wheel-drive and 6-wheel-steering) vehicle using optimum tire force distribution method. When we make used of independent driving and steering system, the motion control performance of the 6WD/6WS vehicle can be improved. For example, vehicle's maneuverability is more improved at low speed and vehicle's stability is also improved at high speed...
Skid-steered vehicles are favored for military use in off-road operations because of their high maneuverability and mobility on extreme terrains and obstacles. There is a trend towards transforming steered tracked vehicles to skid-steered wheel vehicles for high speed at the expense of reduced mobility. Skid-steered vehicles turn by generating different longitudinal forces at the tires due to the...
One of the advantages of using electric vehicles (EVs) and hybrid electric vehicles (HEVs) is recovering energy through vehiclepsilas braking regeneration. In this paper, a regenerative braking control strategy for a fuel cell hybrid vehicular power system has been presented based on fuzzy logic. Fuel cell output power is determined according to the driving load requirement and the battery SOC, using...
The electromagnetic damp characteristics, namely, the characteristics of electromagnetic torque varying according to angular velocity, of permanent magnet synchronous generator (PMSG) were derived by phasor method. The relationships between the characteristics and PMSG interior parameters were discussed. Transient process and electromechanical time constant were proposed. Both the analysis result...
Compared with traditional fuel vehicles, electric vehicles need to deal with the problem of mapping relationship between accelerator pedal and motor-driving torque. At present, this problem is mainly resolved by means of PID control and Fuzzy control. However, the issues on stability, real-time performance, adaptability and complex achievement follow, too. In this paper, a neuromuscular-like model...
As a new energy transmission device, dual rotor four-quadrant transmission (4QT) simplifies power-train structure of electrical variable transmission (EVT) and makes internal combustion engine (ICE) operate in high efficiency region. Reduction of fuel consumption and the improvement of vehicle performance are achieved as well. In this paper, different operation modes of EVT are analyzed based on the...
A dual mechanical ports electric machine (DMPM) with clutch is used as an electrical variable transmission (EVT) in hybrid electric vehicle (HEV). In this paper, the working principle and advantages of this novel converter is explained. Then a method of power parameters matching design for DMPM with clutch considering the fuel economy and power performance based on driving cycle is presented and the...
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