Abstract: Aiming at the capture process of a tether net, the evaluation criterion of successful capture is proposed, and the influence of the non ideal parameters on the net capture is studied. The mass spring damper method is used to model the tether net and the contact dynamics model of the tether net considering the friction force is established. Based on the side length of the net, the limit size of the target is determined. The evaluation criterion to define the successful capture of the tether net under ideal and non ideal cases are proposed, and the effects of shooting velocity error, shooting synchronization, and extraction force error on the capture performance of the tether net are studied. The results reveal that the deployment rate of 80% is too strict as the threshold value of a successful capture, and the tether net has a high degree of fault tolerance.

Key words: Tether net, Mass spring damper method, Contact dynamics, Capture performance