Helicopter/engine integrated system model with torsional vibration dynamic characteristic taken into consideration

• Main Authors: LI PENGYUAN, XU TIANZHEN, JU XINXING, MIAO LIZHEN, ZHANG HAIBO, SUN FENGYONG
• Format: Patent
• Language: English
• Published: 23.12.2015
• Subjects: CALCULATING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a helicopter/engine integrated system model with a torsional vibration dynamic characteristic taken into consideration and belongs to the technical field of helicopter system control and simulation. In the integrated system model, the rotating speed omega EI of an output shaft of an engine in the system model is determined according to the formula in the specification, wherein omega represents a constant rotor wing rotating speed; N represents a gear transmission ratio of an engine rotating speed to a rotor wing rotating speed; the unit shown in the specification represents a first-order derivative of engine DOF (degree of freedom) torsion relative angular displacement Psi E with respect to time, and the engine DOF torsion relative angular displacement Psi E is obtained by resolving a helicopter/engine integrated torsional vibration model shown in the specification. The invention further discloses a helicopter/engine integrated control system established on the basis of the helicopter/engine integrated system model. By comparison with the prior art, the torsional vibration dynamic characteristic of a helicopter/engine integrated system is sufficiently considered, and the model is simpler and also better accords with the torsional vibration condition of a helicopter/engine under the actual flight condition.