longitudinal stability

简明释义

纵稳性

英英释义

例句

1.The longitudinal stability of the vehicle was enhanced by adjusting its weight distribution.

通过调整重量分布，增强了车辆的纵向稳定性。

2.Pilots are trained to understand the importance of longitudinal stability for safe landings.

飞行员接受培训，以理解纵向稳定性对于安全降落的重要性。

3.A boat with good longitudinal stability will remain upright in rough waters.

一艘具有良好纵向稳定性的船在波涛汹涌的水域中将保持直立。

4.Engineers conducted tests to measure the longitudinal stability of the new model under various conditions.

工程师们进行了测试，以测量新型号在不同条件下的纵向稳定性。

5.The aircraft's design prioritizes longitudinal stability to ensure a smooth flight experience.

飞机的设计优先考虑纵向稳定性以确保飞行体验平稳。

作文

In the field of aerodynamics and engineering, the concept of longitudinal stability plays a crucial role in the design and performance of aircraft. Longitudinal stability refers to the ability of an aircraft to maintain its flight path in a straight line along the longitudinal axis, which runs from the nose to the tail of the aircraft. This stability is essential for ensuring smooth and controlled flight, particularly during takeoff, cruising, and landing phases. Without adequate longitudinal stability, an aircraft may experience difficulties in maintaining altitude and could be prone to excessive pitching movements, which can lead to dangerous situations.The importance of longitudinal stability can be illustrated by examining how different aircraft designs affect their flying characteristics. For instance, a well-designed aircraft will have its center of gravity positioned correctly in relation to its aerodynamic center. This positioning ensures that any pitching moments caused by changes in airflow or control inputs are counteracted by the natural stability of the aircraft. In contrast, if the center of gravity is too far forward or backward, the aircraft may become unstable, requiring constant adjustments by the pilot to maintain level flight.One key factor contributing to longitudinal stability is the design of the tail surfaces, particularly the horizontal stabilizer. The horizontal stabilizer provides a balancing force that counters the pitching moments generated by the wings and the fuselage. When the aircraft pitches up, the angle of attack of the horizontal stabilizer increases, generating a downward force that helps to bring the nose back down. Conversely, if the aircraft pitches down, the stabilizer's angle of attack decreases, allowing the nose to rise. This dynamic interplay between the wings and the stabilizer is fundamental to achieving and maintaining longitudinal stability.Moreover, the control surfaces, such as elevators, also play a significant role in managing longitudinal stability. Elevators are located on the trailing edge of the horizontal stabilizer and are used by pilots to control the pitch of the aircraft. By deflecting the elevators up or down, pilots can introduce additional forces that either enhance or counteract the natural stability of the aircraft. Therefore, understanding how to effectively use these control surfaces is vital for pilots to ensure safe and efficient flight operations.In conclusion, longitudinal stability is a fundamental aspect of aircraft design and performance. It not only affects the safety and comfort of passengers but also influences the overall efficiency of flight operations. Engineers and designers must carefully consider the positioning of the center of gravity, the design of tail surfaces, and the functionality of control surfaces to achieve optimal longitudinal stability. As aviation technology continues to advance, maintaining a strong focus on this critical factor will be essential for the development of safer and more efficient aircraft in the future.

在空气动力学和工程学领域，纵向稳定性的概念在飞机的设计和性能中起着至关重要的作用。纵向稳定性指的是飞机沿着纵轴（从飞机的鼻部到尾部的轴线）保持其飞行路径直线的能力。这种稳定性对于确保平稳和可控的飞行至关重要，特别是在起飞、巡航和着陆阶段。如果没有足够的纵向稳定性，飞机可能会在维持高度方面遇到困难，并且可能会出现过度俯仰运动，从而导致危险情况。通过研究不同飞机设计如何影响其飞行特性，可以说明纵向稳定性的重要性。例如，设计良好的飞机将其重心正确定位于气动中心的相对位置。这种定位确保了由于气流或控制输入变化引起的任何俯仰力矩，都能被飞机的自然稳定性所抵消。相反，如果重心过于靠前或靠后，飞机可能会变得不稳定，要求飞行员不断调整以维持水平飞行。影响纵向稳定性的一个关键因素是尾翼的设计，特别是水平稳定器。水平稳定器提供一种平衡力，抵消机翼和机身产生的俯仰力矩。当飞机向上俯仰时，水平稳定器的攻角增加，产生向下的力，帮助将机头拉回下来。相反，如果飞机向下俯仰，稳定器的攻角减小，允许机头上升。这种机翼与稳定器之间的动态相互作用是实现和维持纵向稳定性的基础。此外，控制面，例如升降舵，也在管理纵向稳定性中发挥着重要作用。升降舵位于水平稳定器的后缘，飞行员通过它来控制飞机的俯仰。通过将升降舵向上或向下偏转，飞行员可以引入额外的力量，以增强或抵消飞机的自然稳定性。因此，理解如何有效使用这些控制面对于飞行员确保安全和高效的飞行操作至关重要。总之，纵向稳定性是飞机设计和性能的基本方面。它不仅影响乘客的安全和舒适性，还影响飞行操作的整体效率。工程师和设计师必须仔细考虑重心的位置、尾翼的设计以及控制面的功能，以实现最佳的纵向稳定性。随着航空技术的不断进步，持续关注这一关键因素对于未来更安全、更高效的飞机开发将至关重要。