Instruments and Control
VŠB-TU Ostrava, 6.5.2003
| Annotation of paper No. 40 |
|---|
| Title: | The Control of the Rotational Speed of Hydraulic Engine in Hydrostatic Transmission by Use the Module DSP |
| Author(s): | PIOTROWSKA, Agata |
| Text: | In spite that hydrostatic transmission is well-known object since a long time and practical universally to it new solutions in continuation were sought was, which was it been possible to apply in arrangements of adjustment. Such drives must have great precision in set problem, the most important is the exact realization of set speed. With regard on kind of running executed through hydrostatic drives as well as on variation of conditions in what this running she be executed, the sequence of problems appears in track the projections and the construction of for hydrostatic transmissions the arrangements of adjustment in working machine engines. The rotational speed of hydraulic engine the two-stage controller, controllers of type PID to control the most often be practical in classic figure at present or noise modified at an angle of immunity. Rotational speed method using absolute value DSP in article be circumscribed to control. The practical gender of hydrostatical transmission about closed circulation of liquid to investigations was put-upon the most often. She be built from multi-piston axial pump about variable of efficiency as well as engine about solid working absorbency. The change of rotational speed of hydraulic engine be realized across control volumetric on road of change of efficiency hydraulic pump. The output of pump control be realized with the help of the electrohydraulic of aggregate master, which hydraulic coupling cylinder is from deflection executive unit the rotor of pump. Unit servovalve is master. Angular deflection of rotor of pump and this the dislocation the piston rod of cylinder be exchanged on dislocation it causes change of her output as well as direction of expression then it in turn causes the change of rotational speed as well as sense of rotation of hydraulic engine. Incriminating aggregate the weight of transmission be realized electrohydraulic, connect from hydraulic engine, which similarly how transmission works in closed circulation of liquid. The mathematical model of transmission in first unit of article was introduced. It model on his basis was built was to simulating investigations in packet MATLAB/SIMULINK. It in more far unit was described was prepare the realization of controller of type PID near utilization modules SPAC20, which is quick coprocessor (DSP) for programmers Mitsubishi. He is provided for to intensive calculations numeric as well as to folded processes .It to it was control the rotational speed of hydraulic engine was proposed the cascade algorithm. Dislocation hydraulic servo-motor the parameters of controller were well-chosen to control first and the parameters of controller were chosen stabilizing the rotational speed of hydraulic engine then. The computer of PC to registration of measuring data was used. It processed measuring signals were passed was on analog input of measurement card Advantech. Received unit of article the state the composition and comparison of results on road of simulation with coming from with laboratory investigations of object results. The results of investigations of controller be introduced for different points of working as well as near regard the disturbances also. |