Automation Solutions for Special Vehicles

MOBIL ELEKTRONIK supplies entire automation solutions for all branches of special vehicle construction such as port vehicles, airport vehicles/GSE, heavy load vehicles, industrial trucks/material handling as well as mobile loader cranes and working platforms.

Projection and implementaion is done under observance of the Machine Guideline and branch-specific norms and safety standards. The exhaustive product portfolio contains:

  • steer-by-wire systems
  • control-by-wire of hydraulic systems
  • brake-by-wire
  • drive-by-wire
  • load torque regulation / crane control
  • inductive and optical guidance systems / AGV
  • vehicle diagnostics / remote diagnostics / data logger

 

Steer-by-Wire with Approval

Our dual-circuit fail-operational steer-by-wire systems are ground-breaking in X-by-wire technologies. Approved for public traffic they are the next milestone in the development of steer-by-wire systems.

 

 

 

Fail-operational Steer-by-Wire System for Safeaero De-Icer

Providing an entirely redundant system structure a fail-operational steering system for the De-Icer was designed. In the event of an accidental failure such as cable break, short-circuit, drop of a power source or defect of a component the steering function is maintained through a second circuit. This leads to an inproved availability and safety corresponding to the grown requirements on the apron.

The set point generator is mechanically/hydraulically completely decoupled from the chassis and the vehicle is operated fully electronically from the mast cabin. The system provides a realistic steering feedback with simulation of a variable steering force and a mechanical end stop

Rear Axle Steering System in a Pushback

So far the steering of the rear axle in a pushback tractor was linked to the orbitrol circuit of the front axle. In these systems high steering forces and inner leakage lead to steering deviation of the rear axle. Moreover, changing of the steering modes e.g. from all-wheel into crab steering requires a return-to-zero procedure in order to synchronize the axles.

The electronic-hydraulic steering system applied in the TUG GT110 is using an angle transducer on the front axle. Based on the front axle steering angle, the vehicle geometry and the vehicle speed a set point for the rear axle is calculated in the safety steering computer. A proportional valve provides the steering movement of the rear axle, so the rear axle is mechanically completely decoupled from the front axle and always synchronized according the geometry due to a closed-loop control circuit. The axle payload is not an issue at all and finally only a question of the nominal volume flow of the hydraulic valve.

A change of different steering modes can be done from any steering position of the axles. Moreover, in vehicles with two driver cabins the orbitrol and the electronic-hydraulic steering valve can be assigned to the respective axle in dependency of the drive direction and active driver cabinet, so maloperation is avoided.