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针对某型直升机无人化改装过程中带传动离合器的控制要求,探讨一种具有安全保护功能的控制系统.通过分析带传动离合器的操纵原理和控制特性,提出了控制系统的设计需求,确定了控制系统的总体方案.采用转速反馈和间歇接合的控制方法,实现离合器的自动接合,避免发动机转速降幅过大.通过采集着陆信号,采取硬件注销的方式,避免无人直升机在飞行中响应离合器分离等危险指令.采用转速反馈和磁电机间歇接地的控制方法,防止发动机在离合器未接合的情况下超速.在某型无人直升机上分别进行自动接合试验和超速保护试验,在地面模拟进行空中/地面保护试验.结果显示:自动接合试验中发动机最小转速为960r/min;超速保护试验中发动机瞬时最大转速为2 016r/min,最小转速为1 088r/min,超速持续时间为0.5s;空中/地面保护试验确认了地面状态指令正常执行和空中状态指令注销的功能.试验结果表明:该控制系统设计方案满足无人直升机的使用需求.
A kind of control system with safety protection is discussed in view of the control requirements of belt clutch in the unmanned conversion process of a certain type of helicopter.Through analyzing the operation principle and control characteristics of belt clutch, the design requirements of the control system are proposed, Control system of the overall program.Using speed feedback and intermittent engagement control method to achieve automatic clutch engagement to avoid engine speed drop is too large.Combined landing signal by taking the way of hardware write-off, to avoid unmanned helicopter in response to clutch separation And other dangerous directives. The use of speed feedback and magneto intermittent grounding control method to prevent the engine in the clutch is not engaged in the case of speeding.A type of unmanned helicopter on the automatic engagement test and speeding test, ground simulation in the air / Ground protection test.The results show that the minimum engine speed is 960 r / min in the auto-engagement test, the instantaneous maximum speed is 2 016 r / min, the minimum speed is 1.088 r / min and the overspeed duration is 0.5 s, The ground protection test confirmed that the ground status command is normally executed and airborne The instruction cancellation function test results showed that: the control system design to meet the needs of unmanned helicopter.