Abstract:
An actuator system for extending and flexing a joint, including a multi-motor assembly for providing a rotational output, a rotary-to-linear mechanism for converting the rotational output from the multi-motor assembly into an extension and flexion of the joint, and a controller for operating the actuator system in several operational modes. The multi-motor assembly preferably combines power from two different sources, such that the multi-motor assembly can supply larger forces at slower speeds (“Low Gear”) and smaller forces at higher speeds (“High Gear”). The actuator has been specifically designed for extending and flexing a joint (such as an ankle, a knee, an elbow, or a shoulder) of a human. The actuator system may, however, be used to move any suitable object through any suitable movement (linear, rotational, or otherwise).
Abstract:
The invention relates to embodiments of methods for extending a subject-controllable range of joint motion, and for increasing subject control of joint movement within a range of motion. Embodiments include fastening a powered device around a joint so as to be able to control the joint, allowing the subject to move the joint within a range of volitional motion, and then engaging the powered device to support movement of the joint into an expanded, rehabilitative range. In some embodiments, the device supports joint movement by substantially providing the force to move the joint beyond the volitional boundary. In other embodiments, supporting movement includes the subject substantially providing the force, and the device allowing movement only in a desired direction. The invention further relates to a system for increasing the functional capability of a joint by implementing embodiments of the method. By such methods and system, rehabilitation is accomplished both by building strength, and training neural pathways.
Abstract:
In an implementation of latent error detection, memory regions that each correspond to a different processor element of a redundant processor system are scanned for latent processing errors maintained as erroneous data. The data maintained in the memory regions is compared to detect a latent processing error in a first memory region. The latent processing error is resolved by copying data from a second memory region into the first memory region where the data maintained in the second memory region is determined to be identical to data maintained in at least a third memory region.
Abstract:
An apparatus and method for tolerating failure of the AC power source in a power supply switchable between the AC power source and a battery, in a processor system having a set of one or more components subject to being powered down. When the failure of the AC power source is recognized, the power supply is switched from the AC power source to the battery. For a first period of time, the battery powers the processor system with all components powered on. The battery then powers the processor system with the specific set of components powered off for a second period of time. In one embodiment, a determination is made that the battery can power the processor system with the set of components powered down for a predetermined period of time. A determination of the first period of time is then made as the capacity of the battery exceeding the predetermined period of time, if the excess capacity is used to power the processor system with the set of components powered on. In effect, a processor system incorporating one embodiment of the invention rides through a first period of a power outage, operating as normal and masking the loss of AC power. For a second, predetermined period, the processor system shuts down optional hardware and maintains the state of memory using the battery power.
Abstract:
Multiple processors are connected to form a multiprocessor system having inter-processor communicating capability. Each processor maintains a configuration option register indicating the resources necessary to operate the multiprocessor system. In the event of a power-fail signal, indicating that possible power loss is imminent, a processor will proceed through a shut-down procedure to save the present operating state so that when power is re-applied the processor can continue from the operating state it left when power was lost. Those processors not receiving a power-fail signal will attempt to reconfigure the multiprocessor system, waiting a reasonable amount of time for the processor receiving the power-fail signal to continue operations. If the processor has not recovered from the power-fail signal after a reasonable amount of time, the other processors check the configuration option register to determine whether that processor is necessary for operation of the multiprocessor system. If it is, then the processors wait for the processor according to a formula specified in said reconfiguration option register. Otherwise, the processors exclude the processor from the system and continue operation without the excluded processors.
Abstract:
An actuator system for extending and flexing a joint, including a multi-motor assembly for providing a rotational output, a rotary-to-linear mechanism for converting the rotational output from the multi-motor assembly into an extension and flexion of the joint, and a controller for operating the actuator system in several operational modes. The multi-motor assembly preferably combines power from two different sources, such that the multi-motor assembly can supply larger forces at slower speeds (“Low Gear”) and smaller forces at higher speeds (“High Gear”). The actuator has been specifically designed for extending and flexing a joint (such as an ankle, a knee, an elbow, or a shoulder) of a human. The actuator system may, however, be used to move any suitable object through any suitable movement (linear, rotational, or otherwise).
Abstract:
A method and system of copying a memory area between processor elements for lock-step execution. At least some of the illustrative embodiments may be a method comprising executing duplicate copies of a first program in a first processor of a first multiprocessor computer system and in a first processor of a second multiprocessor computer system (the executing substantially in lock-step), executing a second program in a second processor element of the first multiprocessor computer system (the first and second processors of the first multiprocessor computer system sharing an input/output (I/O) bridge), copying a memory area of the second program executing in the second processor element of the first multiprocessor computer system to a memory of a second processor element in the second multiprocessor computer system while the duplicate copies of the first program are executing in the first processor elements, and then executing duplicate copies of the second program in the second processors in lock-step.
Abstract:
Techniques for routing data packets in a networked system. Specifically, a network system and methods of arbitrating data packets in a network system are provided. Switching devices are configured to receive one or more data packets, wherein each of the one or more data packets includes a respective source identification. The source identifications are compared to a source identification history mechanism, and the routing order of the data packets is determined based on the comparison.
Abstract:
Aligning execution point of duplicate copies of a user program by exchanging information about instructions executed. At least some of the exemplary embodiments may be a method of operating duplicate copies of a user program in a first and second processor, allowing at least one of the user programs to execute until retired instruction counter values in each processor are substantially the same, and then executing a number of instructions of each user program. Of the instructions executed, at least some of the instructions are decoded and the inputs of each decoded instruction determined (the decoding substantially simultaneously with executing in each processor). The method further may include exchanging among the processors addresses of decoded instructions and values indicative of inputs of the decoded instructions, determining that an execution point of the user program in the first processor lags with respect to an execution point of the user program in the second processor using at least the addresses of the decoded instructions, and advancing the first processor until the execution point within each user program is substantially aligned.
Abstract:
A system for issuing a family of instructions during a single clock includes a decoder for decoding the family of instructions and logic, responsive to the decode result, for determining whether resource conflicts would occur if the family were issued during one clock. If no resource conflicts occur, an execution unit executes the family regardless of whether dependencies among the instructions in the family exist.