Aircraft cable harness virtual assembly technology has an important influence on improving the efficiency of the aircraft assembly and performance of the machine. Modeling on aircraft cable harness is elementary and difficult. For aircraft cable harness elements, there are two kinds of the most common process constraints: suspension constraint and minimal bending constraint. The catenary theory has been proposed to model the elements under the suspension constraint accurately. For the elements under the minimal bending constraint the robot arm has been chosen to build the dynamic model to simulate the lying process. By controlling the parameters of the robot arm to meet the minimal bending radius requirement, the cables’ geometric changes can be realized in time. The Aircraft Cable Harness Virtual Assembly System (ACHVAS) has been developed and the cable harness elements under the two constraints have been demonstrated in the platform to verify effectiveness of the two models.

In order to improve the assembling efficiency and assembling quality of complex electromechanical products, it presents the method for deducing the assembling space ranks of harness from their assembling process information.It establishes the harness assembling space priority matrix to generate some assembling se-quences as the initial population, describes the fitness functions of harness assembling sequence from perspec-tives of assembling space ranks, the maximum diameter, the maximum length and number of branches.It devel-ops genetic algorithm, realizes the harness assembling sequence planning, obtains the optimal assembling se-quence and outputs the process information.

It is important for cable assembly to simulate the process planning on mechanical and electrical products in virtual environments.The planar static cable model was proposed according to the theory of catenary for cables to install under the suspended condition.To satisfy the real-time requirement for the cable assembly simulation,the planar cable model could be built rapidly by the algorithm analysis on its key parameters on condition that the cable length and two fixed endpoints of the cable were determined.Using the coordinate transformation method,the 3D cable assembly simulation model under the suspended condition could be gotten from the planar cable model,which is suitable for the environment platform.Using the cable assembly simulation model,the dynamic simulation for cables under the suspended condition could be realized by real-time getting cable’s terminal point coordinates and computer screen’s refreshing.At the same time,the tensions of each key point of cables could be computed to guide cable realistic assembly process.

In order to improve the efficiency of the cable assembly , it proposes a method for the modeling and simulation of cables in virtual environment according to their geometrical characteristics .A cable is modeled by rigid rod connected with joints like a robot manipulator arm .Based on a start and an end position and orientation of the cable , the method calculates the shape of the cable using the principle of inverse kinematics , uses the B-spline curve passing control points to smooth the cable models .This can factually simulate the true shape of ca-bles .The results show that the method is less time -consuming , and can realize the real-time simulation of de-formable cables in a virtual environment .