Gimbal lock is a phenomenon that can occur when using a three-axis gimbal to control the orientation of a camera or other object. It occurs when two of the three axes of rotation become aligned, causing the object to lose one degree of freedom. This can make it difficult or impossible to control the orientation of the object, as any attempt to rotate it around one of the locked axes will also cause it to rotate around the other locked axis.
There are a number of ways to avoid gimbal lock. One common method is to use a redundant set of sensors to measure the orientation of the object. This allows the system to determine the orientation of the object even if one or more of the axes are locked. Another method is to use a gimbal that has a limited range of motion. This prevents the axes from becoming aligned and causing gimbal lock.