本文件规定了姿势支撑装置（PSD）的静态、冲击和重复载荷强度要求，以及用于未定义轮椅座椅系统的相关连接硬件。它规定了测试方法，以确定是否满足产品投入使用的最低性能要求。它还规定了测试结果的披露要求。并非所有测试都适用于所有PSD。 本文件也适用于其他座椅系统。 测试方法可用于验证制造商关于产品符合本文件要求的声明。本文件不适用于设计为在特定静态、动态或重复负载下发生故障的PSD。 本文件不适用于机动车碰撞条件下PSD的强度。 本文件不评估长期使用寿命。 注意事项1.ISO16840？4提供了用作机动车轮椅座椅一部分时轮椅座椅系统的碰撞试验方法和要求。 注意事项2.对于大于或小于本文件规定的用户质量，可以对测试设备尺寸、安装点间距、力等进行适当的外推，并在测试报告中注明测试参数。 注意事项3.刚性替代测试夹具用于提供标准化测试方法，因此本文件不涉及特定轮椅上PSD的测试。

This document specifies requirements for static, impact, and repetitive load strengths for postural support devices (PSDs) with associated attachment hardware intended for use with an undefined wheelchair seating system. It specifies the test methods for determining whether the minimum performance requirements have been met to release a product into use. It also specifies requirements for disclosure of the test results. Not all tests apply to all PSDs. This document is also applicable to other seating systems. The test methods can be used to verify the manufacturer’s claims that a product meets the requirements of this document. This document does not apply to PSDs that are designed to fail under certain static, dynamic, or repetitive loads. This document does not apply to the strength of PSDs under crash conditions in a motor vehicle. This document does not evaluate long-term useful life. NOTE？1？ISO？16840？4 provides crash test methods and requirements for wheelchair seating systems when used as part of a wheelchair seat in a motor vehicle. NOTE？2？For user masses greater or less than those specified in this document, appropriate extrapolation of test apparatus dimensions, mounting point separation, forces, etc. can be carried out, and the test parameters noted in the test report. NOTE？3？Rigid surrogate test fixtures are utilized to provide a standardized test method, and consequently this document does not involve a test of a PSD on a particular wheelchair.