大学MOOC Airplane Stability and Control(Northwestern Polytechnical University)1458073162 最新慕课完整章节测试答案

Quiz 1

1、单选题：

‌The AOA response of an aircraft after being disturbed is given below. The airplane is statically                   , and dynamically               .

‎

‌

‎选项：
A: stable, stable
B: stable, unstable
C: unstable, stable
D: unstable, unstable
答案: 【 stable, unstable】

2、单选题：
‍For the International Coordinate System, 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. For the USSR coordinate system, 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: upward
B: downward
C: to the left
D: to the right
答案: 【 to the right】

3、单选题：
‌The average Cooper-Harper rating of an aircraft is 4.5, it belongs to              flying quality.‌
选项：
A: Level I
B: Level II
C: Level III
D: Uncontrollable
答案: 【 Level II】

4、单选题：
‍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: positive, positive
B: negative, positive
C: positive, negative
D: negative, negative
答案: 【 positive, negative】

5、单选题：
‎If the side force acting on the rudder is left (negative), this side force will generate a           yawing moment.‎
选项：
A: left
B: right
C: upward
D: downward
答案: 【 right】

6、单选题：
​Rudder locates aft of CG, therefore, a left rudder force will generate a right yawing moment.If the lift acting on the horizontal tail is upward (positive), this tail lift will generate a            pitching moment.‎
选项：
A: nose-up
B: nose-down
C: right
D: left
答案: 【 nose-down】

7、单选题：
‏Which category of flight phases has the highest flying quality requirement?‎
选项：
A: Category A
B: Category B
C: Category C
D: Category D
答案: 【 Category A】

8、多选题：
​Which of the following aircraft belong to class IV?‌
选项：
A: F-22
B: A-10
C: C-130
D: B-2
E: A320
F: F/A-18
答案: 【 F-22;
A-10;
F/A-18】

9、多选题：
‎Which flight phases belong to Category A?‎
选项：
A: Takeoff
B: Landing
C: Air-to-Air Combat
D: Formation
E: Cruise
F: Aerobatic
答案: 【 Air-to-Air Combat;
Formation;
Aerobatic】

10、判断题：

​According to the Cm ~ CL figure, the aircraft is longitudinally stable before stall.

‏

​

‏选项：
A: 正确
B: 错误
答案: 【 正确】

11、判断题：

‌ and are the same coefficient.

‎选项：
A: 正确
B: 错误
答案: 【 错误】

Quiz 10

1、单选题：
‍At low speeds, the phugoid frequency                with the increase of forward velocity.‍
选项：
A: decreases
B: increases
C: remains unchanged
D: [ / ]
答案: 【 decreases】

2、单选题：
​The eigenvalue of roll-subsidence mode mainly depends on which of the following parameters.‍
选项：
A:

B:
C:

D:
答案: 【 
】

3、单选题：
‏The Dutch-roll frequency mainly depends on which of the following parameters.​
选项：
A:

B:
C:
D:
答案: 【 】

4、单选题：
​When the aircraft roll to the right, the right wing AOA will            .‍
选项：
A: increase
B: decrease
C: remain unchanged
D: [ / ]
答案: 【 increase】

5、单选题：
‍If the spiral mode eigenvalue is negative, theflying quality is             .‌
选项：
A: Level I
B: Level I
C: Level II
D: Uncontrollable
答案: 【 Level I】

6、多选题：
‍Which of the following parameters are related to the Dutch-roll mode characteristics?‏
选项：
A:

B:
C:
D:
E:
F:
答案: 【 
;
;
;
】

7、多选题：
‎Which of the following situations satisfy the Level I flying quality requirements?‏
选项：
A: Fighter at Cat A flight phase, Tr = 1.2
B: Fighter at Cat B flight phase, Tr = 1.2
C: Fighter at Cat C flight phase, Tr = 1.2
D: Cargo at Cat B flight phase, Tr = 1.2
E: Cargo at Cat C flight phase, Tr = 1.2
答案: 【 Fighter at Cat B flight phase, Tr = 1.2;
Cargo at Cat B flight phase, Tr = 1.2;
Cargo at Cat C flight phase, Tr = 1.2】

8、判断题：
​For the spiral mode, the requirements for Category A is higher than those for Category B and C.​
选项：
A: 正确
B: 错误
答案: 【 错误】

9、判断题：
‎The roll-subsidence mode characteristics of high AR aircraft are better than low AR aircraft.‌
选项：
A: 正确
B: 错误
答案: 【 正确】