基于逆仿真的直升机机动飞行科目数学模型及其应用

逆仿真可以驱动直升机仿真模型完成预定的机动科目,给出完成该机动的操纵输入规律和飞行状态变量的时间历程,因此建立机动科目数学模型是逆仿真的前提。本文提出了一个较通用的直升机机动科目分段函数描述方法,该方法可以对ADS－33E－PRF规定的大部分任务科目建立逆仿真所需的数学模型。以UH－60A“黑鹰”直升机为例,将以该方法所建立的机动科目“转向目标”、“障碍滑雪”数学模型应用于逆仿真,并依照ADS－33E－PRF的有关指标,根据仿真结果对“黑鹰”直升机驾驶品质的某些方面作出了评价,结果表明,该方法建立的数学模型能够真实有效地描述机动科目。

Mathematical Modeling and Its Application for Helicopter Maneuver Flight Based on Inverse Simulation

The inverse simulation allows a helicopter simulation model to be driven by a pre-defined maneuver, and the control input histories, flight state variables histories to be found, so the critical issue is to establish a mathematical model for maneuver flight. A general mathematical method with subsection function is given to describe helicopter maneuver, most of mission task elements (MTE) defined in ADS-33E-PRF can be modeled. Taking the helicopter UH-60A as a sample, the mathematical model of "turn to target" and "slalom" is established and the model is used in inverse simulation. The handling qualities of the helicopter are assessed by simulational results according to ADS-33E-PRF. Results confirms that the method can model the maneuver well and truly.