A SELF-TUNING CONTROLLER FOR THE PRIMARY SUSPENSION SYSTEM OF A HIGH-SPEED TWO-AXLE RAILWAY VEHICLE

摘要

AN ACTIVE PRIMARY SUSPENSION SYSTEM FOR A RAILWAY VEHICLE FOR MAINTAINING WHEELSET (2) STABILITY AND PROVIDING SATISFACTORY CURVING PERFORMANCE COMPRISING OF A SELF TUNING LINEAR-QUADRATIC CONTROLLER COUPLED TO THE SUSPENSION SYSTEM TO MINIMIZE THE LATERAL DISPLACEMENT OF THE WHEELSET (2) OF A RAILWAY VEHICLE RELATIVE TO TRACK CENTER LINE AND ITS YAW ANGLE ON BOTH STRAIGHT AND CURVED TRACKS. IN ONE EMBODIMENT OF THE SELF TUNING LINEAR-QUADRATIC CONTROLLER INCLUDES A CONTINUOUS-TIME LEAST-ABSOLUTE ERROR WITH VARIABLE FORGETTING FACTOR (C-T LAE + VFF) ESTIMATION ALGORITHM WHICH IS COUPLED TO THE CONTROLLER TO ESTIMATE THE TIME VARYING CONICITY AND CREEP COEFFICIENTS VALUES OF THE WHEELSET (2). THE ESTIMATED CONICITY AND CREEP COEFFICIENTS VALUES WILL BE USED BY THE SELF TUNING LINEAR-QUADRATIC CONTROLLER DESIGN ALGORITHM TO GENERATE THE CONTROLLER FEEDBACK GAIN OVER A WHOLE RANGE OF THE WHEELSET PARAMETERS? VARIATIONS FOR MINIMIZING THE LATERAL DISPLACEMENT OF THE WHEELSET (2). THE MOST ILLUSTRATIVE DRAWING: