Abstract:
A cargo loading system for a cargo compartment of a means of transport, for example a cargo aircraft or a passenger aircraft, is provided. The system includes at least one power drive unit for transporting cargo of the means of transport. The power drive unit and a control module are coupled to a BUS system. The control module generates control signals for the power drive unit and maintenance data of the power drive unit for the control and maintenance of the power drive unit. The BUS system transmits the control signals and maintenance data of the power drive unit between the control module and the power drive unit. In this manner an existing hardware platform of the means of transport can be used, and weight and cabling as well as the number of control boxes of the means of transport can be reduced.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a continuation of International Application No. PCT/EP2011/063537, filed Aug. 5, 2011, which application claims priority to German Patent Application No. 10 2010 033 568.1, filed Aug. 6, 2010 and to U.S. Provisional Application No. 61/371,353, filed Aug. 6, 2010, which are incorporated herein by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The technical field relates to cargo loading systems for means of transport. In particular, the technical field relates to a cargo loading system for a cargo compartment of a means of transport. Furthermore, the technical field relates to an aircraft comprising the cargo loading system and to a method for loading and unloading cargo to/from a means of transport by means of the cargo loading system. 
     BACKGROUND 
     In cargo loading systems (also called control and conveyance systems) dedicated controllers may be used that process and forward data and control signals from connected devices. In this process, many different ways of communication within the system and the environment of the system may be used, for example in extraneous systems. 
     From DE 10 2006 047 238 B4 a cargo loading system comprising guide rails and a setting device for aligning bearing parts on tolerance-associated structures is known. EP 1 110 860 A1 describes a cargo loading system for an aircraft for loading and unloading loading units, wherein roller drive units are provided for transporting the cargo, latch units are provided for locking the cargo, and control units are provided for operating the roller drive units and/or the latch units. 
     In addition, other objects, desirable features and characteristics will become apparent from the subsequent summary and detailed description, and the appended claims, taken in conjunction with the accompanying drawings and this background. 
     SUMMARY 
     According to various exemplary embodiments, provided are a cargo loading system/cargo loading control system for a cargo compartment of a means of transport, an aircraft comprising a corresponding cargo loading system, and a method for loading and unloading cargo to/from a means of transport by means of the cargo loading system. 
     According to an exemplary embodiment of the present disclosure, a cargo loading system for a cargo compartment of a means of transport is stated, which cargo loading system comprises at least one power drive unit for transporting cargo of the means of transport, a control module, and a BUS system comprising a bus. The at least one power drive unit and the control module are connected to the bus by means of data lines. The control module is designed for generating control signals for the at least one power drive unit and maintenance data of the at least one power drive unit for the control and maintenance of the at least one power drive unit. The BUS system is designed for transmitting the control signals and maintenance data of the at least one power drive unit between the control module and the at least one power drive unit. 
     Such a cargo loading system may make it possible for the control module to be connected to a bus of the BUS system, and to be able to communicate or exchange data, by way of the bus, with one or several power drive units that are also connected to the bus. In this arrangement the data flow is controlled by way of an access method (protocol), which can, for example, take place by means of the control module. All the connected components, for example the control module and the at least one or several power drive units, are cross-linked (networked) through the BUS system. Supplying power to the components and to the bus can take place by way of a direct-current or alternating-current supply. 
     With the use of such a cargo loading system with a BUS system for transmitting control signals and maintenance signals it is possible to do away with discrete lines between individual components such as the control module, and with the at least one or several power drive units, and consequently the expenditure relating to cabling is minimized, and additional components such as power drive units can be connected in a simple and flexible manner. Furthermore, when compared to conventional cargo loading systems a reduction in weight can be achieved because an already existing hardware platform can be used. 
     The bus can, for example, be a CAN-bus which by means of the controller area network (CAN) interconnects several components that have equal rights by way of a two-wire bus. Such a CAN-bus may have high resistance to malfunction and a real-time capability; it may also be more cost effective than conventional buses. 
     Maintenance data that by means of the BUS system can be transmitted between the at least one power drive unit and the control module can, for example, be fault messages of the at least one power drive unit, which fault messages can be transmitted by the control module to external units, for example to a control system. 
     Such a cargo loading system represents an intelligent network, by means of which network existing hardware platforms such as integrated module avionics (IMA) that are currently present in a means of transport, for example in an aircraft, can be used. In this arrangement the control module can be a cargo loading system (CLS) ATA50 or an ATA25-control module. By means of the BUS system the system components of the cargo loading system can be reduced, when compared with a cargo loading system without a BUS system, in that existing hardware platforms are used, which can result in a reduction in weight. The control module can, for example, be integrated in a central hardware platform. 
     The means of transport can, for example, be an aircraft such as an airplane, a helicopter or a zeppelin, or a motor vehicle, a rail vehicle, a watercraft or a spacecraft. 
     According to another exemplary embodiment of the present disclosure, the control module is designed for controlling the BUS system. 
     Such control of the BUS system by means of the control module may be associated with an advantage in that no further control module needs to be stated for controlling the BUS system, and in that the BUS system can be optimized and efficiently controlled according to the control signals and maintenance data to be transmitted. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system furthermore comprises a control system, wherein the control module is connected to the control system. The control system is designed for transmitting and receiving the control signals and maintenance data of the at least one power drive unit by means of the control module and of the BUS system. The control system is designed for processing the control signals and maintenance data. 
     The control module can be connected to the control system by means of a plug-in connection, and according to another exemplary embodiment can be integrated in the control system. The control system can be a hardware platform, a central control system of an aircraft and/or a control system of the type IMA ATA42. 
     Such connection of a control module of the cargo loading system to a control system can, for example, provide an advantage in that information of the control system, for example relating to a driving state or transport state of the means of transport (for example depending on the flight phase), can be transmitted to the control module. For example it is thus possible, during a journey or during takeoff or landing of the means of transport, to switch off the cargo loading system by means of the control module based on information relating to the driving state or transport state, which information is transmitted to the control system. 
     According to another exemplary embodiment of the present disclosure, the control system, which can, for example, be a hardware platform, is designed for the connection of further modules apart from the control module. The further modules are, for example, selected from the group comprising a control system module for door systems and an undercarriage module. The cargo loading system is, among other things, designed to be switched on and off by means of at least one of the further modules on the basis of transport phases of the means of transport. 
     Such a cargo loading system with a control module that is connected to a (central) control system, for example a hardware platform, which cargo loading system comprises further modules, for example a control system module for doors, and an undercarriage module, makes it possible for the cargo loading system to be switched off while the means of transport is engaged in transport, for example during flight of an aircraft. According to requirements of regulatory authorities, cargo loading control systems and drive systems must be switched off during flight. Switch-off cannot be carried out solely by the control module of the aircraft (ATA50-chapter or ATA25-chapter). Data relating to the state of closure of all the doors (for example during takeoff or landing) can easily be tapped by the control system, to which, for example, the control system module for doors is connected, and can be transmitted to the bus system, which subsequently can initiate switch-off, for example by way of the electronic fuse unit or semiconductor fuse unit (for example the secondary power distribution box, SPDB) of the cargo loading system. Furthermore, the control system can detect whether the aircraft is still on the ground, for example by means of the undercarriage module connected to the control system. Thus the cargo loading system can be switched off by means of the control system, by way of the control module during a flight phase and during a takeoff and landing phase of the aircraft, in that information relating to the flight phase or to the takeoff and landing phase is transmitted by means of corresponding modules that are connected to the control system. In this manner less cabling and reduced susceptibility to malfunction can be provided. Such switching-off can also take place by way of a door system that is connected to the control system. 
     Furthermore, in a control system it is possible to connect modules for identifying the cargo, which modules can then transfer information relating to the cargo, by means of the control system, to the control module, which modules subsequently correspondingly control the at least one power drive unit or several power drive units. In this arrangement the cargo can, for example, be identified by means of a cargo evaluation system (CES). 
     According to another exemplary embodiment of the present disclosure, the control system further comprises a module interface for connecting the control module and the further modules. The module interface is designed for data exchange between the control module connected to the module interface and to the further modules connected to the module interface. 
     Such a cargo loading system comprising a control module that is connected to a control system with a module interface makes it possible for information to be exchanged between different modules in the means of transport, which information is relevant to the cargo to be moved or to the cargo loading system, for example, as already mentioned above, information relating to the transport phase of the means of transport, for example to a flight phase or takeoff and landing phase, by way of an undercarriage module. 
     According to another exemplary embodiment of the present disclosure, the control system further comprises a configuration unit that is designed for configuring the control module that is connected to the control system, wherein said configuration unit is designed for configuring further modules connected to the control system. 
     Such a cargo loading system with a control system that comprises a configuration unit makes it possible for several modules to be able to be connected in a simple manner to the control system, which can be the central control system of the means of transport, without there being the need to specially and expensively configure each individual module. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system further comprises a power supply unit, wherein the BUS system is designed for cross-linking the power supply unit with the at least one power drive unit and with the control module for supplying power to the at least one power drive unit and to the control module. 
     The power supply unit can be designed for providing a voltage, for example about 270 V, in the form of direct voltage or alternating voltage, for the at least one power drive unit. 
     Such a cargo loading system, connected to a power supply unit for providing a particular voltage, makes it possible for the individual components of the cargo loading system to be able to be supplied with power by means of a single voltage, rather than, as is the case in conventional cargo loading systems, with different voltages of about 115 V and about 28 V. 
     According to another exemplary embodiment of the present disclosure, the BUS system with the BUS, in particular with the CAN-BUS, is designed for regulating the supply of power to the control device, the control module, the control system and a maintenance system, wherein the maintenance system and the control device can form part of the cargo loading system. 
     The power supply unit can comprise a fuel cell and/or a battery. According to another exemplary embodiment of the present disclosure, the power supply unit is supplied with power by a generator that is driven by a turbine. 
     According to another exemplary embodiment of the present disclosure, the power supply unit is connected by means of a line to the BUS system or the BUS and/or directly to the BUS. In this context the term “directly” means without any interruption, for example as a result of data lines, terminals or other electrical connections or BUSES. 
     According to another exemplary embodiment of the present disclosure, the power supply unit is designed for the requirement-oriented supply of power to the at least one power drive unit on the basis of a control signal of the control module, which control signal is transmitted by means of the BUS system. 
     In other words, the at least one power drive unit or several power drive units can be supplied with power depending on their individual requirements, wherein the requirement for power can be determined by the control module in that data relating to the power requirement is transmitted, by way of the BUS system, to the control module by the power drive units or by the at least one power drive unit. 
     Such a cargo loading system with a requirement-oriented supply of the at least one power drive unit makes it possible, for example, to save power and thus costs, and thus ensure an efficient cargo loading system. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system comprises a safeguard or fuse unit for monitoring the supply of power to the cargo loading system. 
     In this arrangement according to another exemplary embodiment the safeguard or fuse unit can comprise at least one secondary power distribution box (SPDB), a solid state power controller (SSPC) as well as a power monitoring unit. 
     Such a safeguard or fuse unit can be associated with an advantage in that in the case of a possible short circuit of a component of the cargo loading system the cargo loading system can be switched off, and thus the other components are not damaged. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system further comprises a power-supply BUS system, for example a power supply, wherein the at least one power drive unit is connected to the power-supply BUS system. The power-supply BUS system is designed for the requirement-oriented supply of power to the at least one power drive unit. 
     Such a cargo loading system with a power-supply BUS system for the at least one power drive unit makes it possible that only one connection to the power-supply BUS needs to be established, for example from a power supply source or power supply unit, to which power-supply BUS the at least one power drive unit or several power drive units are connected, thus obviating the need to provide discrete power supply lines from the power supply source to each of the at least one power drive units or to each of the several power drive units. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system further comprises a maintenance system for receiving and transmitting maintenance data from/to the at least one power drive unit. 
     The maintenance system can be connected by means of a BUS, for example an aeronautical radio incorporated (ARINC) BUS for communicating with the control system, wherein the maintenance system collects fault messages of the at least one power drive unit, or in the case of several power drive units collects fault messages for each power drive unit, for example relating to which ones of the power drive units were defective at a particular point in time. At particular points in time the maintenance system transmits the maintenance data to a base control station, which can, for example, be arranged outside the means of transport. 
     Such a cargo loading system with a maintenance system makes it possible for power drive units that for example have become faulty during transport to be identified and switched off. 
     In this arrangement, maintenance data can be transmitted that is important to the operator and that leads to maintenance action. This data is, for example, displayed on the on-board maintenance system of an aircraft. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system further comprises a control device that is connected to the BUS system and that is designed for controlling the at least one power drive unit by means of the control module. 
     The control device can be a portable control panel and can be designed for transmitting and receiving control signals and maintenance data of the at least one power drive unit. The control device can carry out the function of the control module, and can transmit and receive corresponding control signals and maintenance data by way of the BUS system to and from power drive units and further connected components, for example the maintenance and control system. In this arrangement, according to another exemplary embodiment, the control device can wirelessly communicate or exchange data with the control module and/or the BUS. 
     Such a cargo loading system with a control device, which is, for example, portable, makes it possible for the power drive units to be able to be controlled simply and efficiently from any desirable location in the cargo compartment or outside the cargo compartment. 
     According to another exemplary embodiment of the present disclosure, the cargo loading system further comprises at least one proximity switch, wherein the at least one proximity switch is designed for switching on and off the at least one power drive unit on the basis of a position of cargo, which cargo can be moved by the at least one power drive unit. 
     In this arrangement the at least one proximity switch can be supplied with power, independently or separately of the at least one power drive unit, for example by means of a power supply unit, and consequently independent switching on and switching off of the power drive unit is ensured, even if the power supply of the power drive unit is defective. The position of the cargo relative to the fastening device, for example a cargo latch, is determined by the power drive unit and/or the proximity switch, and on the basis of this position the proximity switch switches the power drive unit on or off. For example, when the cargo is locked by means of the fastening unit, and when the power drive unit assumes a corresponding position, the power drive unit is switched off by the proximity switch on the basis of this position. 
     When the cargo is locked down (with the latch in the upright position) the power drive unit is switched off. When the cargo is unlocked (with the latch in the folded-down position) the power drive unit is enabled/switched on. 
     Any operation of the power drive unit or of the power drive units when the cargo is locked down is prevented. 
     According to another exemplary embodiment of the present disclosure, an aircraft comprising a cargo loading system according to any one of the exemplary embodiments described above and below is stated, wherein at least one fastening unit for holding the cargo during cargo transport through the aircraft is stated. In this arrangement the aircraft can be a passenger aircraft or a cargo aircraft. 
     According to another exemplary embodiment of the present disclosure, a method for loading and unloading cargo to/from a means of transport by means of a cargo loading system according to any one of the exemplary embodiments described above and below is stated, which method comprises generating a control signal for at least one power drive unit by means of a control module; transmitting of the control signal from the control module to the at least one power drive unit by means of a BUS system; and moving cargo by means of the at least one power drive unit on the basis of the control signal transmitted by means of the BUS system. 
     The individual features of the various exemplary embodiments can also be combined, as a result of which, in part, advantageous effects may arise which exceed the sum of the individual effects even if these effects are not expressly described. 
     In one example, it should be noted that features or characteristics described so far and below with regard to the means of transport comprising the cargo loading system can also be implemented in the method and vice-versa. 
     A person skilled in the art can gather other characteristics and advantages of the disclosure from the following description of exemplary embodiments that refers to the attached drawings, wherein the described exemplary embodiments should not be interpreted in a restrictive sense. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The various embodiments will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and wherein: 
         FIG. 1  shows a diagrammatic view of a cargo loading system for a cargo compartment of a means of transport, according to an exemplary embodiment of the present disclosure. 
         FIG. 2  shows a diagrammatic view of a cargo loading system for a cargo compartment of a means of transport, according to another exemplary embodiment of the present disclosure. 
         FIG. 3  shows a diagrammatic view of an aircraft comprising a cargo loading system according to an exemplary embodiment of the present disclosure. 
         FIG. 4  shows a diagrammatic view of a flow chart of a method for loading and unloading cargo to/from a means of transport by means of a cargo loading system according to an exemplary embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The following detailed description is merely exemplary in nature and is not intended to limit the present disclosure or the application and uses of the present disclosure. Furthermore, there is no intention to be bound by any theory presented in the preceding background or the following detailed description. 
       FIG. 1  describes a cargo loading system  100  for a cargo compartment of a means of transport with three power drive units  101 ,  102 ,  103  for the transport of cargo in the means of transport. The cargo loading system  100  comprises a control module  106  and a BUS system  108  with a bus  110 , wherein the power drive units  101 ,  102 ,  103  and the control module  106  are connected to the bus  110  by means of data lines  111 ,  112 . The control module  106  is designed for generating control signals for the power drive units  101 ,  102 ,  103  and maintenance data of the power drive units  101 ,  102 ,  103  for the control and maintenance of the power drive units  101 ,  102 ,  103 . The BUS system  108  is designed for transmitting the control signals and maintenance data of the power drive units  101 ,  102 ,  103  between the control module  106  and the power drive units  101 ,  102 ,  103 . The bus  110  can be designed as a CAN-bus  110 . The control module  106  is designed for controlling the BUS system  108 . 
     A control system  130  is stated to or on which the control module  106  is connected or integrated or plugged in, wherein the control system  130  is designed for transmitting and receiving the control signals and maintenance data from the power drive units  101 ,  102 ,  103  by means of the control module  106  and of the BUS system  108 . The control system  130  is designed for processing the control signals and maintenance data. The control system  130  can be a hardware platform and is designed for the connection of further modules  132 ,  134 ,  136  that are selected from the group comprising a control system module  132  for doors, a module for supplying electrical power  134 , and an undercarriage module  136  as examples of further modules. The cargo loading system  100  is designed to be switched on and off by means of at least one of the further modules  132 ,  134 ,  136  on the basis of transport phases of the means of transport. Transport phases of the means of transport can, for example, be the flight phase or the takeoff and landing phase of an aircraft. 
     The control system  130  comprises a module interface  138  for connecting the control module  106  and the further modules  132 ,  134 ,  136 , for example by means of lines  137 , that are designed for data exchange between the control module  106 , which is connected to the module interface  138 , and the further modules  132 ,  134 ,  136  that are connected to the module interface  138 . In this way it is possible, for example, to exchange data relating to the flight phase, takeoff and landing phases as well as relating to the power supply or the undercarriage state by way of the module interface  138  between the corresponding modules  106 ,  132 ,  134 ,  136  and thus, for example, the cargo loading system can be correspondingly switched on or off, for example when an aircraft is in flight, which complies with the requirements of regulatory authorities. 
     The control system  130  further comprises a configuration unit  140  for configuring the control module  106  connected to the control system  130  and for configuring further modules  132 ,  134 ,  136  connected to the control system  130  by means of lines or channels  142 . A power supply unit  120  is connected to the bus  110  of the BUS system  108  by means of a data line  115 , wherein the BUS system  108  is designed for networking the power supply unit  120  with the at least one power drive unit  101 ,  102 ,  103  and with the control module  106  for supplying power to the at least one power drive unit  101 ,  102 ,  103 , and to the control module  106 . The control module  106  is connected to the bus  110  by means of the data line  112 . The control module  106  can be plugged into the control system  130 , wherein the control system  130  can be connected to the bus  110  by means of the data line  112 . 
     Supplying power can take place in a requirement-oriented manner according to the requirements of each one of the power drive units  101 ,  102 ,  103  on the basis of control signals of the control module  106 , which control signals are transmitted by means of the BUS system  108 . 
     The cargo loading system  100  can further comprise a safeguard or fuse unit  122  for monitoring the power supply of the cargo loading system, which safeguard or fuse unit  122  is connected to the power supply unit  120  by means of a line  117 , which power supply unit can, for example, be a fuel cell or a battery and/or can be supplied with current by means of a generator driven by turbines. In this arrangement the safeguard or fuse unit  122  can comprise at least one SSPC that can be connected to an SPDB, wherein a power monitoring unit is designed for monitoring the power consumption or the supply of power to the cargo loading system  100  for monitoring each of the at least one SPDBs. 
     By means of a data line  114  a maintenance system  150  is connected to the bus  110  of the BUS system  108  and is designed for receiving and transmitting maintenance data of the at least one power drive unit. In this arrangement the maintenance system  150  collects fault messages of the at least one power drive unit or of each individual power drive unit  101 ,  102 ,  103  and can, for example, detect which power drive unit  101 ,  102 ,  103  was defective at a given point in time. The maintenance system  150  can transmit the data, for example wirelessly, to a base control station that can be arranged outside the means of transport. 
     By means of a line  113  a control device  160  is connected to the bus  110  of the BUS system  108  and is designed for controlling the power drive units  101 ,  102 ,  103  by means of the control module  106 . The control device  160  can be a portable control panel and can be designed for transmitting and receiving control signals and maintenance data to/from the at least one power drive unit  101 ,  103 . 
     A proximity switch  170 ,  171 ,  172  is connected to each of the three power drive units  101 ,  102 ,  103  and is designed for switching on and off the power drive units  101 ,  102 ,  103  on the basis of the position of cargo that can be moved by means of the at least one power drive unit  101 ,  102 ,  103 . In this arrangement, each one of the proximity switches is supplied with power independently or separately of the power drive units  101 ,  102  by means of the power supply unit  120 . To this effect, in the exemplary embodiment of  FIG. 1 , for example, each one of the proximity switches is connected to a power-supply BUS  118  at which power is transmitted, by means of data lines  116  and  117 , from the power supply unit  120  by way of the fuse unit  122  to the power-supply BUS  118 . 
       FIG. 2  diagrammatically describes the cargo loading system according to  FIG. 1 , except that apart from the BUS system  108  with the bus  110  for the transmission of control signals and maintenance data a power-supply BUS system  210  is provided to which several power drive units  101 ,  102 ,  103 ,  104 ,  105  are connected to nodal points  213  by means of lines  212 , wherein the power-supply BUS system  210  is supplied with power by way of a power supply line  211  that is connected to the bus  210  at a nodal point  213 . In this arrangement the power supply line  211  is connected to a safeguard unit  122  by way of which safeguard unit  122  power from a power supply unit  120  is transmitted by means of the line  117  to the power supply line  211 , if applicable depending on the requirements of the individual power drive units  101 ,  102 ,  103 ,  104 ,  105 . 
     In a manner that differs from that in the exemplary embodiment of  FIG. 1 , in the embodiment of  FIG. 2  the supply of power to the proximity switches  170 ,  171 ,  172 ,  173 ,  174  does not take place separately of the supply of power to the power drive units  101 ,  102 ,  103 ,  104 ,  105 , but instead directly by way of the respective power drive units  101 ,  102 ,  103 ,  104 ,  105 . 
     The BUS system  108  comprises a bus  110  to which the fuse unit  120  is connected to the node  214  by way of the line  115 , and the power drive units  101 ,  102 ,  103 ,  104 ,  105  are connected to the nodes  214  and  215 , in each case by means of a line  111 . 
     When compared to the exemplary embodiment of  FIG. 1 , the control system  130  comprises only the control module  106 , the control system module for doors  132 , and the module for supplying electrical power  134 , wherein corresponding signals or data can be exchanged among the modules  106 ,  132 ,  134  by means of the module interface  138 . The configuration unit  140  is correspondingly designed for configuring the modules  106 ,  132  and  134 , which are connected to or integrated in the control system  130 , by means of the channels  142 . 
     By means of a bus  114 , for example an aeronautical radio incorporated (ARINC) bus, the maintenance system  150  is connected directly to the control system  130 . The control system  130  is, furthermore, directly connected, by way of a bus  112 , to the nodal point  216  of the bus  110 . The control device  160  is connected to a nodal point  217  of the bus  112  by means of a line or a bus  113 . 
       FIG. 3  shows an aircraft  300  as an exemplary embodiment of a means of transport  300  with a cargo loading system  100  according to  FIGS. 1  and/or  2  with corresponding power drive units  101 ,  102 ,  103 ,  104  for moving cargo  304  that is held or fastened by means of the fastening unit  302  during cargo transport through the aircraft  300 . 
     In  FIG. 4  a flow chart of a method  400  for loading and unloading cargo to/from a means of transport by means of the cargo loading system is stated, which method involves generating  401  a control signal for at least one power drive unit by means of a control module; involves transmitting  402  the control signal from the control module  106  to the at least one power drive unit by means of a BUS system; and involves moving  403  cargo by means of the at least one power drive unit on the basis of the control signal transmitted by means of the BUS system. 
     Although the present disclosure has been described with reference to the exemplary embodiments, various alterations and modifications can be carried out without leaving the protective scope of the present disclosure. A cargo loading system can be used both in a cargo compartment in an aircraft, and in any other means of transport, for example in rail vehicles, watercraft, spacecraft as well as in airplanes and helicopters. 
     In addition, it should be pointed out that “comprising” does not exclude other elements or steps, and “a” or “an” does not exclude a plural number. In particular, the cargo loading system for a cargo compartment in a means of transport can, for example, comprise more than one power drive unit, more than one control module, more than one BUS system, more than one control system, more than one power supply unit, more than one fuse unit, more than one power-supply BUS system, more than one maintenance system, more than one control device, more than one proximity switch; the control system can comprise more than one module interface, more than one configuration unit, more than one module; and the aircraft can comprise more than one cargo loading system and more than one fastening unit. 
     While at least one exemplary embodiment has been presented in the foregoing detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the present disclosure in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the present disclosure as set forth in the appended claims and their legal equivalents.