Simulation of automatic control system of differentials locking of heavy trucks
Keywords:
control system, transmission, differential locks, heavy trucksAbstract
The method of introducing a rigid kinematic connection in transmission is one of the modern promising scientific and technical directions for increasing energy efficiency, passability and fuel efficiency of vehicles. A rigid kinematic connection is provided by locking the corresponding differential. Rigid kinematic connection in the transmission is introduced in cases of moving in difficult road conditions with significant forces of external resistances and a non-homogeneous support surface. Similar power distribution mechanisms in the transmission, as well as their automatic control systems, are widely used in passenger car designs. The emergence of automatic control systems for locks of differentials of trucks is a further prospect for the development of the automotive industry. One of the main disadvantages of this method is the difficult introduction of a rigid kinematic connection during the movement of the vehicle. The most effective solution to this problem is to build a control system integrated with standard anti-lock and traction control systems. The article presents an algorithm for the automatic control system for locking the differentials of a truck with a 6×6 wheel arrangement. For a fully differential transmission, a control law for two interaxle and three inter-wheel locks of differentials has been developed. The control process is realized by a multicriteria analysis of the current mode of operation of the vehicle.
The control algorithm is approved by means of simulation simulation using the model of the three-axis three-wheel drive vehicle with a detailed transmission. The architecture of the developed system for road tests and debugging of the algorithm is given. The obtained results testify to the adequacy and efficiency of the developed control algorithm with the possibility of further equipping the automatic locking system for the differentials of commercially produced vehicles with the proposed control system.
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