  Modular design is the foundation of on orbit construction technology of large
space facilities in the future.Standard interface is the key technology of
modular design of the future space robotic systems and space facilities.This
paper presents the designed and tested of PetLock,a standard and genderless
interface which can transfer mechanical loads,power and data between the future
modular space robotic manipulator and spacecraft.PetLock adopts a completely
genderless design,including connection face,locking mechanism,data and power
interface.The connection surface provides a large translation and rotation
misalignment tolerance,due to its 120-degree symmetrical and 3D shape
design.The locking mechanism features the three locking pins retraction
structure design,which is simple and reliable.POGO pin connectors in the center
of the interface provides the power and data transfer capabilities.Due to the
advantages of high locking force,large tolerance,high reliability and low
cost,PetLock has the very big application potential in future on orbit
construction missions.
