What kind of harness design is needed to connect automotive components?

Since there is grease in the harness, the metal composite tape will be in contact with the grease for a long period of time, which makes it necessary to consider the compatibility with the grease. Compatibility is looked at to see if the base tape and polymer film will blister or delaminate in the grease. Corrosion resistance is whether the composite tape will delaminate or cause corrosion to the base tape in an acidic or alkaline environment. For example, the base belt of composite steel belt, usually with chrome-plated steel belt, chrome layer is characterized by that in the humid atmosphere is very stable, but also in the general acidic environment is also very stable. This is because the metal chromium itself oxidizes very easily in the atmosphere into a very thin passivation layer. Tests and long-term use have proved that chrome-plated steel belts are quite stable and reliable for use in wire harness design composite belts.

Connector library is the basis of programming, through the establishment of the connector library, programming directly call, to avoid each time to build the program to define the connector, especially for the same series of chassis, only need to define once, the establishment of a modular programming framework, for other chassis can be directly call this module, to improve the efficiency of programming. The test program is prepared in the system software, which is based on the standard wiring diagram (table) and the connection relationship between the chassis and the tester, and the use of self-learning combined with input method is the main method of programming. The correct establishment of the connector library is very important, all the connectors of the chassis under test must be correctly and accurately written into the connector library, the definition, number, number of terminals, model number is clear and accurate, the number, the definition of a unique. In order to simplify the input process, the first choice of harness design on the longer line as the main harness, and in turn, according to the branch point of the harness to divide the node, not through the main line line of the branch line from the main harness node or branch line of the node connected to the surface cladding segmentation describes each node to the previous node between the cladding method, so that describes the main structure of the harness. The two ends of the loop are connected from the nodes of the main harness or the nodes of the branch wires with plastic plugs, connectors, or no headers without any parts, collectively referred to as terminals: or with other circuits for a single match, thus describing the starting and stopping position of the loop, the length of the path between the two ends of the loop connection point is the length of the loop. In order to input convenience, usually in the form of adding terminals to specify the access position of the circuit, as in the material database has been configured with plastic inserts for each plug applicable joints, sealing plugs and plugs (commonly referred to as holes in the annex), add plastic inserts, respectively, specify the circuit number of each receiver, the system according to the cross-sectional area of the circuit and the adaptive range of the annex to the bit to automatically determine should be crimped joints and sealing plugs model, then the drawing inserts any part, collectively referred to as terminal: or with other circuits single match, thus describing the starting and stopping position of the circuit between the two ends of the path length is the length of the circuit. Then insert the corresponding block file and text notes of the plastic plugs on the drawing; adding joints and headless processing is similar to this. Nodes, terminals, circuits and other information between the connection, the data structure formed after inputting the information and the body of one-to-one correspondence, the reference relationship between the data corresponds to the relationship in the diagram. In addition, there are a number of positioning parts on the wire harness, strapping parts and customer requirements of the banding material, but also through the graphical way to add to the product information. In this way, the harness nodes as the main line and the terminals as the end point of the circuit that is a complete description of the starting and ending points of the circuit and the structural information of the harness design.

In order to make the above designed model not to resonate during excitation it is necessary to carry out a modal analysis of the above design to find out the intrinsic frequency of the model at each order. The intrinsic frequency which is unfavorable.

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