The power train engine→main transmission→main rotor of a conventional helicopter is usually realized in modular design (see Fig.1)Each individual component has its specific function which-also in a geometrical sense-is performed within strictly defined dimensions in line with the respective configuration. The objective of the research and development activities in the field of transmission technology for future helicopter generations in to integrate further functions and components into the helicopter's main transmission. Large-scale integration of additional control functions into the transmission is intended to save weight as well as to minimize losses and failure probability. Improved aerodynamics due to the transfer of moving parts (swash plate, control rods) into the transmission results in an increase in efficiency. Integrated status monitoring as well as reduced operating costs and simplified maintenance are achievable. Within the framework of the Advanced Light Helicopter (ALH) program, ZF Friedrichashafen AG (ZF) together with the Indian Hindustan Aeronautics Ltd.(HAL) has defined and developed an Integrated Dynamic System (IDS) which-due to its innovative design-is superior to today's helicopter power-transmitting systems with regard to above-explained aspects. Further development work momentarily in process at ZF Luftfahrttechnik GmbH(ZFL) is to make use of the experience gained within the ALH program with the objective of finding an application-oriented subsytem which in the future is to represent the only interface between the power unit and the rotor blades.This transmission must possess utmost reliability in all operating conditions and for its entire lifetime. The ZFL-IDS is a promising propulsion system for helicopters of the next generation, due to the synthesis of integrated blade control and flat-type transmission combined with the integration of new technologies for materials, gearing geometry, aerodynamic performance, lubrication and monitoring procedures as well as integrated status control.%普通的直升飞机的动力系统通常是由一些典型的部件(图1)组成.各组成部件具有其专门的功能，同样在几何学方面它们应以其各自的轮廓外形实现严格的尺寸要求。对于未来的直升飞机的改进，在变速器技术领域的研究和开发目标是综合改进直升飞机减速器的功能和部件的结构。增大减速器内的综合控制功能，减小其重量以及最少的损耗和失效的可能性。由于减速器内的运动部件(旋转盘、控制杆)改进了空气动力学，结果使效率增加。综合状况的监测和运行成本的降低以及维修工作的简化是能够达到的。在先进的轻型直升飞机(ALH)的结构方案内，ZF公司和印度Hindustan Aeronautics有限公司(HAL)已经明确开发了一种综合动力系统(IDS)，由于它考虑了以上所述的各个方面的合理设计使当今的直升飞机的动力传动系统优越化，在先进的轻型直升飞机方案中采用一个应用定向辅助系统所取得的经验，时刻推进ZF Luftfahrttechnik GmbH(ZFL)的开发工作。在今后它仅描述动力部件和旋翼叶片之间的相互关系。减速器在所有工况和全部使用寿命内部都必须具有最大的可靠性。由于ZHL-IDS是集中的叶片控制和具有新材料工艺学、齿轮几何学、空气动力性能、润滑和监测措施以及集中工况控制组合的扁平型减速器的综合，所以它是下一代直升飞机的很有前途的动力系统。
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