A hovercraft propulsion pitch angle deviation correction method comprises the steps that the maximum allowable angle difference # imgabs0 # of an air propeller and a pitch feedback value is set, the angle theta 1 of the air propeller and the angle theta 2 of the pitch feedback value are obtained, and the angle difference theta alpha of the air propeller and the pitch feedback value is calculated; obtaining an angle deviation theta3 when the decoder of the rotary transformer is set to be at a zero position; according to the matching characteristics of the propeller, the corrected allowable deviation angle difference # imgabs 1 # of the feedback value of the air propeller and the pitch is obtained; and when a screw pitch changing instruction is carried out, the propeller works at different rotating speeds under different screw pitches according to the matching characteristics of the propeller and the propeller. According to the sudden change of the working condition of the gas turbine, checking the relationship between the angle difference theta alpha of the air propeller and the pitch feedback value and # imgabs2 # after shutdown, and judging whether the pitch angle needs to be corrected or not; if theta alpha is larger than # imgabs3 #, the screw pitch action is stopped, and screw pitch angle deviation correction is conducted; and if theta alpha is smaller than or equal to # imgabs4 #, the air propeller is controlled to continue to act according to the propeller matching characteristic, and the sailing safety is guaranteed.
一种气垫船推进螺距角度偏移修正方法,设置空气螺旋桨和螺距反馈值最大允许角度差#imgabs0#,获取空气螺旋桨角度θ1和螺距反馈值角度θ2,计算空气螺旋桨和螺距反馈值角度差θα;获取旋转变压器解码器置零位时角度偏差θ3;根据机桨匹配特性,得到修正的空气螺旋桨和螺距反馈值允许偏差角度差#imgabs1#;当进行螺距变距指令时,根据机桨匹配特性,螺旋桨进行不同螺距下的转速工作。根据燃机工况发生突变,停机后检查空气螺旋桨和螺距反馈值角度差θα和#imgabs2#之间的关系,判断螺距角是否需要修正;若|θα|>|#imgabs3#|则停止螺距动作,进行螺距角度偏移修正;若|θα|≤|#imgabs4#|,则根据机桨匹配特性控制空气螺旋桨继续动作,保证航行的安全。
Hovercraft propulsion pitch angle deviation correction method
一种气垫船推进螺距角度偏移修正方法
2024-12-31
Patent
Electronic Resource
Chinese
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