1.课程简介及基本概念(IntroductionandBasicConcepts)

Test1

1、单选题:

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、单选题:
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、单选题:
‍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、单选题:
‍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、单选题:
‏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
D: 下downward
答案: 【 右right

6、单选题:
‌如果平尾上作用有正升力,则该平尾升力会产生          俯仰力矩.‎‌If the lift acting on the horizontal tail is positive, this tail lift will generate a              pitching moment.‎
选项:
A: 抬头nose-up
B: 低头nose-down 
C: 向右right
D: 向左left
答案: 【 低头nose-down 

7、单选题:
​对飞行品质要求最高的是哪个飞行阶段?​​Which category of flight phases has the highest flying quality requirement? ​
选项:
A: A种Category A
B: B种Category B
C: C种Category C
D: D种Category D
答案: 【 A种Category A

8、多选题:
‎下列飞机中,属于IV类飞机的有哪些?​‎Which of the following aircraft belong to class IV?​
选项:
A: J-10
B: J-20
C: H-6
D: Y-20
E: C919
F: J-15
答案: 【 J-10;
J-20;
J-15

9、多选题:
‌下列飞行阶段中,属于A种飞行阶段的有‎‌Which flight phases belong to Category A?‎
选项:
A: 起飞Takeoff
B: 着陆Landing
C: 空对空战Air-to-Air Combat
D: 编队飞行Formation
E: 巡航Cruise
F: 爬升Climb
G: 武器投放Weapon delivery
答案: 【 空对空战Air-to-Air Combat;
编队飞行Formation;
武器投放Weapon delivery

10、判断题:

是两个相同的系数.

 and  are the same coefficient.

‎选项:
A: 正确
B: 错误
答案: 【 错误

11、判断题:
‏B种飞行阶段对飞行品质的要求最低。‎‏Category B has the lowest requirement on flying quality.‎
选项:
A: 正确
B: 错误
答案: 【 正确

12、判断题:
‍空中加油属于A种飞行阶段。‍‍In-flight refuel is a CAT A flight phase.‍
选项:
A: 正确
B: 错误
答案: 【 错误

2.纵向静稳定性(LongitudinalStaticStability)

Test2

1、单选题:
​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、单选题:
‍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、单选题:
‍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、单选题:
‍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、单选题:
‎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、多选题:
‌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、多选题:
​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、判断题:
​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

9、判断题:
‌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、判断题:

​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

3.纵向操纵(LongitudinalControl)

Test3

1、单选题:
‏对于同一架飞机,升降舵效率提高,其重心前限会         。‌‏For a given aircraft, if the control effectiveness of elevator increases, the most forward CG location will            .‌
选项:
A: 前移move forward
B: 后移move aftward
C: 不变remain unchanged
D: 不确定uncertain
答案: 【 前移move forward

2、单选题:
​对于静稳定飞机,随着升力系数的增加,为平衡飞机,升降舵需  

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