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美国马丁·玛丽埃塔公司一直把可靠性和维修性看作是精心设计成套系统的重要问题。本文给出一组机械载荷值，在这些载荷下，垂直发射系统（ＶＬＳ）口盖的控制器和传动系统必须在时序等时限制范围内能可靠地工作。本文涉及的数据仅限于与美国海军导弹试验船ＡＶＭ－１（“诺顿海峡”号）的垂直发射系统工作有关的数据。本文涉及到两类口盖系统：发射隔舱口盖可为甲板下装有待发导弹的贮运发射箱提供冲击防护和水密密封；而上气道口盖则可为甲板下增压室燃气排导（在导弹发射时）的上气道提供冲击防护和水密密封。作为这些机械设计载荷最佳化的辅助手段，设置了几个动作开关以控制电动机电流和制动器工作，并向发射定序器提供口盖的位置数据。根据预测载荷，已经计算出安全系数以评估系统机械元件的疲劳寿命。只要硬件分系统适用，就可进行试验以验证临界参数值以及系统设计和工作的可靠性。
The United States Martin Marietta has been the reliability and maintainability as a well-designed system of important issues. This article presents a set of mechanical load values at which the controller and driveline of the vertical launch system (VLS) flap must operate reliably within the timing isochronous limits. The data covered in this paper is limited to data relating to the operation of the vertical launch system of the United States Naval Missile Test Vessel AVM-1 (“Norton Strait”). Two types of flap systems are covered in this article: flaming hatch covers provide impact protection and watertight seals for the stowage launchers containing the missiles to be launched under the deck; and the gas cap can be the gas guide for the underpressure plenum (At missile launch) upper airway provides impact protection and watertight seal. As an aid to optimizing these mechanical design loads, several motion switches are provided to control the motor current and brake operation and provide the firing sequencer with position data for the flap. Based on the predicted load, a safety factor has been calculated to assess the fatigue life of the system’s mechanical components. As long as the hardware subsystem is applicable, experiments can be conducted to verify the critical parameter values as well as the reliability of system design and operation.