Illustrates how you can build your own custom planetary gear components from the Simscape™ Driveline™ Planetary Subcomponents library. The example is based on Example 10.7 published in K.J. Waldron, G.L. Kinzel "Kinematics, Dynamics, and Design of Machinery", 1999. It consists of a coupled planetary train built from simple and compound planetary trains with a common carrier and bevel gears. The simple train fundamental train ratio is -N_4/N_2 * N_7/N_4 = -N_7/N_2. It connects shafts S2 and S7. The compound planetary train fundamental ratio is -N_4/N_2 * N_6/N_5 and it connects shafts S2 and S6. When the input shaft of the train is rotated at 100 rpm, the model shows the output shaft rotates at 1.4456 rpm as given in the reference.

总体比率为256：1的环环齿轮驱动器鉴于单个齿轮网格划分效率，并验证其传输效率。该示例基于W.A.的Tuplin，“设计复合的环环齿轮列车以高速度比率达到最大速度”，机器设计，1957年4月4日。该驱动器由两个环形行驶元素构建，如变速箱示意图所示。该示例确认了本文提出的分析分析预测的0.22的传输效率值。

Model a gear with backlash using the Simple Gear in series with the Foundation Library Rotational Hard Stop. The backlash is set to 0.2 degrees, and the damping adjusted so that there are a few oscillations when the torque is applied.

A test for measuring gear box efficiency. The input shaft is driven at a fixed speed and a variable torque is applied to the output shaft. Power is measured on both the input and output shafts, and efficiency is calculated as the ratio of output to input power. The simulation results match the parameters specified for the efficiency of the gear.

一个简单的齿轮耦合两个惯性（轴）。追随者（F）和基数（B）之间的齿轮比为2：1。因此，跟随轴的角速度是基轴的角速度的一半。跟随轴扭矩是底轴扭矩的两倍。

A variable ratio gear coupling two inertias (shafts). The gear ratio between the follower (F) and the base (B) is steadily increased from 1:1 to 2:1. The ratio of the follower to base angular speed decreases with gear ratio, and conversely the ratio of the follower to base torque increases with gear ratio. The variable gear is implemented using the Variable Ratio Transmission block which includes compliance. Appropriate stiffness and damping values for the compliance will depend upon the levels of torque transmitted by the variable gear. If the compliance damping is unrealistically low, the system can develop high frequency oscillations that require small simulation time steps.