Showing 3 results for Ghariblu
H. Ghariblu, A. Behroozirad , A. Madandar ,
Volume 4, Issue 2 (6-2014)
Abstract
This paper concerns the design and analysis, of a ball type continuously variable transmission, (B-CVT).
This B-CVT has a simple kinematic structure, and same as a toroidal CVT, transmits power by friction on
the contact points between input and output discs, that are connected to each other by balls. After, a brief
introduction of our B-CVT structure, the performance and traction efficiency of B-CVT is analyzed. The
geometry and speed ratio of the proposed CVT is obtained. Then, by finding the contact areas between
rotating elements and stress distribution through them, the torque capacity of B-CVT is computed. Next,
the power loss of the system caused by various parameters such as relative arrangement of rotating
elements as well as relative velocity at contact areas is found. Finally, after presenting the influence of the
different geometrical and assembly conditions at efficiency of the system, the efficiency of the system
compared with the efficiency of a Toroidal CVT.
Mr. Arian Afrabandpey, Dr. Hashem Ghariblu,
Volume 10, Issue 2 (6-2020)
Abstract
To reduce the harmful effects of fuel based engines new technologies in automotive industries have introduced. Combination of novel ball continuously variable transmission and hybrid technologies with the advantages of optimum controlling of power sources in the vehicle are the main topic of this paper by preparing a model of transmission using GT-Suite software. In order to determine the operation and responses of the proposed transmission, different operational modes, along with different inputs in term of speed, torque and ratio are presented. This research successfully demonstrates a new type of transmission which is developed to enjoy the benefits of combining technologies in vehicle drivetrain that features high torque capacity and desirable drivability. Main achievement of this paper is to show the operational modes of this system as well as ability to mode alteration during vehicle operation. Various steady and transient modes are studied in this paper using multi body modeling and it shows HBCVT can eliminate most limitation of parallel hybrid systems.
Hashem Ghariblu,
Volume 12, Issue 2 (6-2022)
Abstract
This paper introduces a trajectory planning algorithm for long-term freeway driving for autonomous vehicles including different modes of motion. In the autonomous driving in a freeway, different maneuvers are needed, including free flow, distance adaption, speed adaption, lane change and overtaking. This paper introduces an algorithm that provides all of these driving scenarios in the trajectory planning for an autonomous vehicle. All maneuvers are classified and proper formulation for each driving mode formulated. Then, an algorithm is introduced to show the procedure of decision making and switching between all driving modes. The relative distances and velocities of the other peripheral and front vehicle from autonomous vehicle are considered as the main factors for decision making during the travelling in the freeway. By the developed simulation programming, validity and effectiveness of the algorithm are verified, and pseudo code and flowchart for the simulation programming are introduced. Later in two simulation studies, different driving conditions are generated and results have been discussed and analyzed by detail.
