Hydraulic support working posture determining method based on space coordinate converting

The invention discloses a hydraulic support working posture determining method based on space coordinate converting. The working posture of a four-bar linkage hydraulic support is obtained by measuring the dip angle value of changing of a support member in real time. The inclination angle, relative to a reference coordinate system, of a base of the hydraulic support, the inclination angle, relative to the reference coordinate system, of a connecting rod of the hydraulic support and the inclination angle, relative to the reference coordinate system, of a top beam of the hydraulic support are measured in real time, and the positions and angles of the current members and the length of a driving oil cylinder are worked out by establishing the reference coordinate system and a relative coordinate system according to the three angle values and the geometric dimensioning of the support. The hydraulic support working posture determining method is accurate in measurement, the measuring method is simple, and the hydraulic support working posture determining method can be transplanted to a controller or upper computer software conveniently.