2021 飞行器稳定性与操纵性(英)(西北工业大学) 最新满分章节测试答案

文章目录[隐藏]

2. 纵向静稳定性 (Longitudinal Static Stability) Test 2
1. 课程简介及基本概念 (Introduction and Basic Concepts) Test 1
3. 纵向操纵 (Longitudinal Control) Test 3
4. 重心位置与范围 (CG Locations and Limits) Test 4
5. 航向静稳定性 (Directional Static Stability) Test 5
6. 航向操纵与横向操稳特性 (Directional Control and Lateral Stability and Control) Test 6
7. 坐标轴系及运动方程 (Axes and Equations of Motion) Test 7
8. 模态及要求 (Modes and Requirements) Test 8

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-03-02到2021-06-30

2. 纵向静稳定性 (Longitudinal Static Stability) Test 2

小提示:本节包含奇怪的同名章节内容

1、问题:平尾对纵向静稳定性的影响与以下哪个因素无关？Which of the following factors is not related to the tail contribution on longitudinal static stability.
选项：
A:平尾面积Horizontal tail area
B:平尾距重心距离Distance between CG and horizontal tail
C:平尾下洗角Downwash angle of the horizontal tail
D:平尾安装角setting angle of the horizontal tail
答案: 【平尾安装角setting angle of the horizontal tail】

2、问题:机翼对纵向静稳定性的贡献取决于重心位置，重心前移，纵向静稳定性将。Wing contribution on longitudinal static stability depends on CG location, CG moves forward, the stability .
选项：
A:降低decreases
B:提高increases
C:不变doesn’t change
D:N/A
答案: 【提高increases】

3、问题:绝大部分机翼采用的都是正弯度翼型，其零升俯仰力矩系数。Most of the wings use positively cambered airfoil, the zero-lift pitching moment is .
选项：
A:>0positive
B:=0zero
C:<0negative
D:N/A
答案: 【<0negative】

4、问题:平尾会提高飞机的纵向静稳定性，鸭翼会飞机的纵向静稳定性。Horizontal tails increase the longitudinal stability, while canards the longtitudinal stability.
选项：
A:提高increase
B:不影响don’t affect
C:降低decrease
D:N/A
答案: 【降低decrease】

5、问题:螺旋桨式发动机的滑流对以下哪个参数没有影响？Which of the following parameters is not affected by the propeller slipstream?
选项：
A:局部动压local dynamic pressure
B:局部升力local lift
C:局部阻力local drag
D:发动机功率engine power
答案: 【发动机功率engine power】

6、问题:在给定飞行状态下，飞机的纵向静稳定性与以下哪些参数有关？For a given flight condition, which of the following parameters are related to the longitudinal static stability?
选项：
A:机翼弯度Wing camber
B:平尾尾容比Tail volume ratio
C:重心位置CG location
D:飞机升力系数Lift coefficient
E:下洗角Downwash angle
F:平尾动压比Tail dynamic pressure ratio
答案: 【平尾尾容比Tail volume ratio;
重心位置CG location;
下洗角Downwash angle;
平尾动压比Tail dynamic pressure ratio】

7、问题:发动机产生的俯仰力矩与哪些因素相关？Which of the following parameters are related to the pitching moment generated by the engine?
选项：
A:发动机类型 Engine type
B:发动机安装角Engine setting angle
C:发动机推力Engine thrust
D:发动机安装位置Engine position
答案: 【发动机类型 Engine type;
发动机安装角Engine setting angle;
发动机推力Engine thrust;
发动机安装位置Engine position】

8、问题:机翼对纵向静稳定性起的是增稳作用。The wing has a stabilizing effect on longitudinal static stability.
选项：
A:正确
B:错误
答案: 【错误】
分析：【机翼的贡献取决于重心相对于焦点的位置，重心在焦点之前为增稳，否则会降低稳定性，不能保证起的是增稳作用。
The wing contribution depends on the relative positions of CG and wing aerodynamic center. If CG is ahead of ac, the wing contribution is stabilizing. While if CG is aft of ac, the wing contribution is destabilizing.】

9、问题:中性点是飞机纵向中立稳定对应的重心位置.Neutral point is the CG location where the aircraft is neutrally stable.
选项：
A:正确
B:错误
答案: 【正确】

10、问题:某飞机的Cm~CL曲线如下图所示，该飞机纵向静稳定The Cm~CL curve of an aircraft is given below, and the aircraft is longitudinal statically stable.
选项：
A:正确
B:错误
答案: 【正确】

11、问题:机翼对纵向静稳定性的贡献取决于重心位置，重心前移，纵向静稳定性将。Wing contribution on longitudinal static stability depends on CG location, CG moves forward, the stability .
选项：
A:降低decreases
B:提高increases
C:不变doesn’t change
D:N/A
答案: 【提高increases】

12、问题:绝大部分机翼采用的都是正弯度翼型，其零升俯仰力矩系数。Most of the wings use positively cambered airfoil, the zero-lift pitching moment is .
选项：
A:>0positive
B:=0zero
C:<0negative
D:N/A
答案: 【<0negative】

13、问题:平尾会提高飞机的纵向静稳定性，鸭翼会飞机的纵向静稳定性。Horizontal tails increase the longitudinal stability, while canards the longtitudinal stability.
选项：
A:提高increase
B:不影响don’t affect
C:降低decrease
D:N/A
答案: 【降低decrease】

14、问题:在给定飞行状态下，飞机的纵向静稳定性与以下哪些参数有关？（多）For a given flight condition, which of the following parameters are related to the longitudinal static stability?
选项：
A:机翼弯度Wing camber
B:平尾尾容比Tail volume ratio
C:重心位置CG location
D:飞机升力系数Lift coefficient
E:下洗角Downwash angle
F:平尾动压比Tail dynamic pressure ratio
答案: 【平尾尾容比Tail volume ratio;
重心位置CG location;
下洗角Downwash angle;
平尾动压比Tail dynamic pressure ratio】

15、问题:发动机产生的俯仰力矩与哪些因素相关？Which of the following parameters are related to the pitching moment generated by the engine?
选项：
A:发动机类型 Engine type
B:发动机安装角Engine setting angle
C:发动机推力Engine thrust
D:发动机安装位置Engine position
答案: 【发动机类型 Engine type;
发动机安装角Engine setting angle;
发动机推力Engine thrust;
发动机安装位置Engine position】

16、问题:机翼对纵向静稳定性起的是增稳作用。The wing has a stabilizing effect on longitudinal static stability.
选项：
A:正确
B:错误
答案: 【错误】

17、问题:某飞机的Cm~CL曲线如下图所示，该飞机纵向静稳定The Cm~CL curve of an aircraft is given below, and the aircraft is longitudinal statically stable.
选项：
A:正确
B:错误
答案: 【正确】

1. 课程简介及基本概念 (Introduction and Basic Concepts) Test 1

1、问题:某飞机纵向受扰动后的迎角响应如下图所示，该飞机纵向静，动。The AOA response of an aircraft after being disturbed is given below. The airplane is statically , and dynamically .
选项：
A:稳定，稳定stable, stable
B:稳定，不稳定stable, unstable
C:不稳定，稳定unstable, stable
D:不稳定，不稳定unstable, unstable
答案: 【稳定，不稳定stable, unstable】

2、问题:如果一架飞机某个试飞科目的Cooper-Harper等级评分为4.5, 则该飞机该科目的飞行品质应为几级？If the average Cooper-Harper rating of an aircraft is 4.5, the flying quality of this aircraft is .
选项：
A:一级level I
B:二级level II
C:三级level III
D:不可控Uncontrollable
答案: 【二级level II】

3、问题:目前我国采用的是国际坐标系，又称欧美坐标系，x由重心指向机头，y由重心指向右，根据右手定律，z轴朝下。在上世纪我国曾经采用过前苏联的坐标系，该坐标系x轴由重心指向机头，y轴由重心指向上，那么根据右手定律，z轴是由重心指向。At present, China adopts the international coordinate system, where x-axis points from CG to the nose, and y-axis points from CG to the right. According to the right-hand system, the z-axis points downward.In the last century, China used the USSR coordinate system. The x-axis points from CG to the nose, and y-axis points upward. According to the right-hand system, the z-axis points .
选项：
A:上upward
B:下downward
C:左to the left
D:右to the right
答案: 【右to the right】

4、问题:按照本课程的符号定义习惯（国际坐标系），绕x轴向右滚转为，绕z轴向左偏航为。According to the sign convention in this course (international coordinate system), roll to the right about the x-axis is , and yaw to the left about the z-axis is .
选项：
A:正，正positive, positive
B:负，正negative, positive
C:正，负positive, negative
D:负，负negative, negative
答案: 【正，负positive, negative】

5、问题:如果垂尾上作用有负侧力，则该侧力会产生偏航力矩.If the side force acting on the rudder is negative, this side force will generate a yawing moment.
选项：
A:左left
B:右right
C:上upward